v1.11.0 (closes #62 )

docs:
* add readme section on using amazon/aws s3 as storage * mention http/https confusion caused by incorrectly configured cloudflare * improve custom-font notes * docker: ftp-server howto * docker: suggest moving hist-folders into the config path and switch the idp docker-compose files to use the main image, in anticipation of v1.11
2024-03-15 20:47:58 +00:00 · 2024-03-14 23:26:26 +00:00 · 2024-03-14 22:30:25 +00:00 · 2024-03-14 18:37:05 +00:00 · 2024-03-14 19:07:35 +01:00 · 2024-03-13 22:50:50 +00:00
97 changed files with 4969 additions and 783 deletions
--- a/.vscode/launch.json
+++ b/.vscode/launch.json
@@ -19,8 +19,7 @@
                "-emp",
                "-e2dsa",
                "-e2ts",
-                "-mtp",
-                ".bpm=f,bin/mtag/audio-bpm.py",
+                "-mtp=.bpm=f,bin/mtag/audio-bpm.py",
                "-aed:wark",
                "-vsrv::r:rw,ed:c,dupe",
                "-vdist:dist:r"
--- a/2
+++ b/2
@@ -1,6 +1,6 @@
 MIT License

-Copyright (c) 2019 ed
+Copyright (c) 2019 ed <oss@ocv.me>

 Permission is hereby granted, free of charge, to any person obtaining a copy
 of this software and associated documentation files (the "Software"), to deal
--- a/README.md
+++ b/README.md
@@ -3,7 +3,7 @@
 turn almost any device into a file server with resumable uploads/downloads using [*any*](#browser-support) web browser

 * server only needs Python (2 or 3), all dependencies optional
-* 🔌 protocols: [http](#the-browser) // [ftp](#ftp-server) // [webdav](#webdav-server) // [smb/cifs](#smb-server)
+* 🔌 protocols: [http](#the-browser) // [webdav](#webdav-server) // [ftp](#ftp-server) // [tftp](#tftp-server) // [smb/cifs](#smb-server)
 * 📱 [android app](#android-app) // [iPhone shortcuts](#ios-shortcuts)

 👉 **[Get started](#quickstart)!** or visit the **[read-only demo server](https://a.ocv.me/pub/demo/)** 👀 running from a basement in finland
@@ -53,6 +53,7 @@ turn almost any device into a file server with resumable uploads/downloads using
    * [ftp server](#ftp-server) - an FTP server can be started using `--ftp 3921`
    * [webdav server](#webdav-server) - with read-write support
        * [connecting to webdav from windows](#connecting-to-webdav-from-windows) - using the GUI
+    * [tftp server](#tftp-server) - a TFTP server (read/write) can be started using `--tftp 3969`
    * [smb server](#smb-server) - unsafe, slow, not recommended for wan
    * [browser ux](#browser-ux) - tweaking the ui
    * [file indexing](#file-indexing) - enables dedup and music search ++
@@ -69,6 +70,7 @@ turn almost any device into a file server with resumable uploads/downloads using
        * [upload events](#upload-events) - the older, more powerful approach ([examples](./bin/mtag/))
    * [handlers](#handlers) - redefine behavior with plugins ([examples](./bin/handlers/))
    * [identity providers](#identity-providers) - replace copyparty passwords with oauth and such
+    * [using the cloud as storage](#using-the-cloud-as-storage) - connecting to an aws s3 bucket and similar
    * [hiding from google](#hiding-from-google) - tell search engines you dont wanna be indexed
    * [themes](#themes)
    * [complete examples](#complete-examples)
@@ -76,7 +78,7 @@ turn almost any device into a file server with resumable uploads/downloads using
    * [prometheus](#prometheus) - metrics/stats can be enabled
 * [packages](#packages) - the party might be closer than you think
    * [arch package](#arch-package) - now [available on aur](https://aur.archlinux.org/packages/copyparty) maintained by [@icxes](https://github.com/icxes)
-    * [fedora package](#fedora-package) - currently **NOT** available on [copr-pypi](https://copr.fedorainfracloud.org/coprs/g/copr/PyPI/)
+    * [fedora package](#fedora-package) - does not exist yet
    * [nix package](#nix-package) - `nix profile install github:9001/copyparty`
    * [nixos module](#nixos-module)
 * [browser support](#browser-support) - TLDR: yes
@@ -103,7 +105,7 @@ turn almost any device into a file server with resumable uploads/downloads using
 * [sfx](#sfx) - the self-contained "binary"
    * [copyparty.exe](#copypartyexe) - download [copyparty.exe](https://github.com/9001/copyparty/releases/latest/download/copyparty.exe) (win8+) or [copyparty32.exe](https://github.com/9001/copyparty/releases/latest/download/copyparty32.exe) (win7+)
 * [install on android](#install-on-android)
-* [reporting bugs](#reporting-bugs) - ideas for context to include in bug reports
+* [reporting bugs](#reporting-bugs) - ideas for context to include, and where to submit them
 * [devnotes](#devnotes) - for build instructions etc, see [./docs/devnotes.md](./docs/devnotes.md)


@@ -157,11 +159,11 @@ you may also want these, especially on servers:
 and remember to open the ports you want; here's a complete example including every feature copyparty has to offer:
 ```
 firewall-cmd --permanent --add-port={80,443,3921,3923,3945,3990}/tcp  # --zone=libvirt
-firewall-cmd --permanent --add-port=12000-12099/tcp --permanent  # --zone=libvirt
-firewall-cmd --permanent --add-port={1900,5353}/udp  # --zone=libvirt
+firewall-cmd --permanent --add-port=12000-12099/tcp  # --zone=libvirt
+firewall-cmd --permanent --add-port={69,1900,3969,5353}/udp  # --zone=libvirt
 firewall-cmd --reload
 ```
-(1900:ssdp, 3921:ftp, 3923:http/https, 3945:smb, 3990:ftps, 5353:mdns, 12000:passive-ftp)
+(69:tftp, 1900:ssdp, 3921:ftp, 3923:http/https, 3945:smb, 3969:tftp, 3990:ftps, 5353:mdns, 12000:passive-ftp)


 ## features
@@ -172,6 +174,7 @@ firewall-cmd --reload
  * ☑ volumes (mountpoints)
  * ☑ [accounts](#accounts-and-volumes)
  * ☑ [ftp server](#ftp-server)
+  * ☑ [tftp server](#tftp-server)
  * ☑ [webdav server](#webdav-server)
  * ☑ [smb/cifs server](#smb-server)
  * ☑ [qr-code](#qr-code) for quick access
@@ -284,6 +287,9 @@ roughly sorted by chance of encounter
  * cannot index non-ascii filenames with `-e2d`
  * cannot handle filenames with mojibake

+if you have a new exciting bug to share, see [reporting bugs](#reporting-bugs)
+
+
 ## not my bugs

 same order here too
@@ -339,9 +345,21 @@ upgrade notes
  * yes, using the [`g` permission](#accounts-and-volumes), see the examples there
  * you can also do this with linux filesystem permissions; `chmod 111 music` will make it possible to access files and folders inside the `music` folder but not list the immediate contents -- also works with other software, not just copyparty

+* can I link someone to a password-protected volume/file by including the password in the URL?
+  * yes, by adding `?pw=hunter2` to the end; replace `?` with `&` if there are parameters in the URL already, meaning it contains a `?` near the end
+
+* how do I stop `.hist` folders from appearing everywhere on my HDD?
+  * by default, a `.hist` folder is created inside each volume for the filesystem index, thumbnails, audio transcodes, and markdown document history. Use the `--hist` global-option or the `hist` volflag to move it somewhere else; see [database location](#database-location)
+
 * can I make copyparty download a file to my server if I give it a URL?
  * yes, using [hooks](https://github.com/9001/copyparty/blob/hovudstraum/bin/hooks/wget.py)

+* firefox refuses to connect over https, saying "Secure Connection Failed" or "SEC_ERROR_BAD_SIGNATURE", but the usual button to "Accept the Risk and Continue" is not shown
+  * firefox has corrupted its certstore; fix this by exiting firefox, then find and delete the file named `cert9.db` somewhere in your firefox profile folder
+
+* copyparty seems to think I am using http, even though the URL is https
+  * your reverse-proxy is not sending the `X-Forwarded-Proto: https` header; this could be because your reverse-proxy itself is confused. Ensure that none of the intermediates (such as cloudflare) are terminating https before the traffic hits your entrypoint
+
 * i want to learn python and/or programming and am considering looking at the copyparty source code in that occasion
  * ```bash
     _|  _      __   _  _|_
@@ -739,7 +757,8 @@ some hilights:
 click the `play` link next to an audio file, or copy the link target to [share it](https://a.ocv.me/pub/demo/music/Ubiktune%20-%20SOUNDSHOCK%202%20-%20FM%20FUNK%20TERRROR!!/#af-1fbfba61&t=18) (optionally with a timestamp to start playing from, like that example does)

 open the `[🎺]` media-player-settings tab to configure it,
-* switches:
+* "switches":
+  * `[🔀]` shuffles the files inside each folder
  * `[preload]` starts loading the next track when it's about to end, reduces the silence between songs
  * `[full]` does a full preload by downloading the entire next file; good for unreliable connections, bad for slow connections
  * `[~s]` toggles the seekbar waveform display
@@ -749,10 +768,12 @@ open the `[🎺]` media-player-settings tab to configure it,
  * `[art]` shows album art on the lockscreen
  * `[🎯]` keeps the playing song scrolled into view (good when using the player as a taskbar dock)
  * `[⟎]` shrinks the playback controls
-* playback mode:
+* "buttons":
+  * `[uncache]` may fix songs that won't play correctly due to bad files in browser cache
+* "at end of folder":
  * `[loop]` keeps looping the folder
  * `[next]` plays into the next folder
-* transcode:
+* "transcode":
  * `[flac]` converts `flac` and `wav` files into opus
  * `[aac]` converts `aac` and `m4a` files into opus
  * `[oth]` converts all other known formats into opus
@@ -940,6 +961,35 @@ known client bugs:
  * latin-1 is fine, hiragana is not (not even as shift-jis on japanese xp)


+## tftp server
+
+a TFTP server (read/write) can be started using `--tftp 3969`  (you probably want [ftp](#ftp-server) instead unless you are *actually* communicating with hardware from the 90s (in which case we should definitely hang some time))
+
+> that makes this the first RTX DECT Base that has been updated using copyparty 🎉
+
+* based on [partftpy](https://github.com/9001/partftpy)
+* no accounts; read from world-readable folders, write to world-writable, overwrite in world-deletable
+* needs a dedicated port (cannot share with the HTTP/HTTPS API)
+  * run as root (or see below) to use the spec-recommended port `69` (nice)
+* can reply from a predefined portrange (good for firewalls)
+* only supports the binary/octet/image transfer mode (no netascii)
+* [RFC 7440](https://datatracker.ietf.org/doc/html/rfc7440) is **not** supported, so will be extremely slow over WAN
+  * assuming default blksize (512), expect 1100 KiB/s over 100BASE-T, 400-500 KiB/s over wifi, 200 on bad wifi
+
+most clients expect to find TFTP on port 69, but on linux and macos you need to be root to listen on that. Alternatively, listen on 3969 and use NAT on the server to forward 69 to that port;
+* on linux: `iptables -t nat -A PREROUTING -i eth0 -p udp --dport 69 -j REDIRECT --to-port 3969`
+
+some recommended TFTP clients:
+* curl (cross-platform, read/write)
+  * get: `curl --tftp-blksize 1428 tftp://127.0.0.1:3969/firmware.bin`
+  * put: `curl --tftp-blksize 1428 -T firmware.bin tftp://127.0.0.1:3969/`
+* windows: `tftp.exe` (you probably already have it)
+  * `tftp -i 127.0.0.1 put firmware.bin`
+* linux: `tftp-hpa`, `atftp`
+  * `atftp --option "blksize 1428" 127.0.0.1 3969 -p -l firmware.bin -r firmware.bin`
+  * `tftp -v -m binary 127.0.0.1 3969 -c put firmware.bin`
+
+
 ## smb server

 unsafe, slow, not recommended for wan,  enable with `--smb` for read-only or `--smbw` for read-write
@@ -970,7 +1020,7 @@ known client bugs:
  * however smb1 is buggy and is not enabled by default on win10 onwards
 * windows cannot access folders which contain filenames with invalid unicode or forbidden characters (`<>:"/\|?*`), or names ending with `.`

-the smb protocol listens on TCP port 445, which is a privileged port on linux and macos, which would require running copyparty as root. However, this can be avoided by listening on another port using `--smb-port 3945` and then using NAT to forward the traffic from 445 to there;
+the smb protocol listens on TCP port 445, which is a privileged port on linux and macos, which would require running copyparty as root. However, this can be avoided by listening on another port using `--smb-port 3945` and then using NAT on the server to forward the traffic from 445 to there;
 * on linux: `iptables -t nat -A PREROUTING -i eth0 -p tcp --dport 445 -j REDIRECT --to-port 3945`

 authenticate with one of the following:
@@ -1028,6 +1078,8 @@ to save some time,  you can provide a regex pattern for filepaths to only index

 similarly, you can fully ignore files/folders using `--no-idx [...]` and `:c,noidx=\.iso$`

+* when running on macos, all the usual apple metadata files are excluded by default
+
 if you set `--no-hash [...]` globally, you can enable hashing for specific volumes using flag `:c,nohash=`

 ### filesystem guards
@@ -1216,11 +1268,24 @@ replace 404 and 403 errors with something completely different (that's it for no

 replace copyparty passwords with oauth and such

-work is [ongoing](https://github.com/9001/copyparty/issues/62) to support authenticating / authorizing users based on a separate authentication proxy, which makes it possible to support oauth, single-sign-on, etc.
+you can disable the built-in password-based login sysem, and instead replace it with a separate piece of software (an identity provider) which will then handle authenticating / authorizing of users; this makes it possible to login with passkeys / fido2 / webauthn / yubikey / ldap / active directory / oauth / many other single-sign-on contraptions

-it is currently possible to specify `--idp-h-usr x-username`; copyparty will then skip password validation and blindly trust the username specified in the `X-Username` request header
+a popular choice is [Authelia](https://www.authelia.com/) (config-file based), another one is [authentik](https://goauthentik.io/) (GUI-based, more complex)

-the remaining stuff (accepting user groups through another header, creating volumes on the fly) are still to-do; configuration will probably [look like this](./docs/examples/docker/idp/copyparty.conf)
+there is a [docker-compose example](./docs/examples/docker/idp-authelia-traefik) which is hopefully a good starting point (alternatively see [./docs/idp.md](./docs/idp.md) if you're the DIY type)
+
+a more complete example of the copyparty configuration options [look like this](./docs/examples/docker/idp/copyparty.conf)
+
+
+## using the cloud as storage
+
+connecting to an aws s3 bucket and similar
+
+there is no built-in support for this, but you can use FUSE-software such as [rclone](https://rclone.org/) / [geesefs](https://github.com/yandex-cloud/geesefs) / [JuiceFS](https://juicefs.com/en/) to first mount your cloud storage as a local disk, and then let copyparty use (a folder in) that disk as a volume
+
+you may experience poor upload performance this way, but that can sometimes be fixed by specifying the volflag `sparse` to force the use of sparse files; this has improved the upload speeds from `1.5 MiB/s` to over `80 MiB/s` in one case, but note that you are also more likely to discover funny bugs in your FUSE software this way, so buckle up
+
+someone has also tested geesefs in combination with [gocryptfs](https://nuetzlich.net/gocryptfs/) with surprisingly good results, getting 60 MiB/s upload speeds on a gbit line, but JuiceFS won with 80 MiB/s using its built-in encryption


 ## hiding from google
@@ -1256,6 +1321,8 @@ the classname of the HTML tag is set according to the selected theme, which is u

 see the top of [./copyparty/web/browser.css](./copyparty/web/browser.css) where the color variables are set, and there's layout-specific stuff near the bottom

+if you want to change the fonts, see [./docs/rice/](./docs/rice/)
+

 ## complete examples

@@ -1395,17 +1462,7 @@ it comes with a [systemd service](./contrib/package/arch/copyparty.service) and

 ## fedora package

-currently **NOT** available on [copr-pypi](https://copr.fedorainfracloud.org/coprs/g/copr/PyPI/)  ,  fedora is having issues with their build servers and won't be fixed for several months
-
-if you previously installed copyparty from copr, you may run one of the following commands to upgrade to a more recent version:
-
-```bash
-dnf install https://ocv.me/copyparty/fedora/37/python3-copyparty.fc37.noarch.rpm
-dnf install https://ocv.me/copyparty/fedora/38/python3-copyparty.fc38.noarch.rpm
-dnf install https://ocv.me/copyparty/fedora/39/python3-copyparty.fc39.noarch.rpm
-```
-
-to run copyparty as a service, use the [systemd service scripts](https://github.com/9001/copyparty/tree/hovudstraum/contrib/systemd), just replace `/usr/bin/python3 /usr/local/bin/copyparty-sfx.py` with `/usr/bin/copyparty`
+does not exist yet;  using the [copr-pypi](https://copr.fedorainfracloud.org/coprs/g/copr/PyPI/) builds is **NOT recommended** because updates can be delayed by [several months](https://github.com/fedora-copr/copr/issues/3056)


 ## nix package
@@ -1535,8 +1592,8 @@ TLDR: yes
 | navpane         |  -  | yep  | yep  | yep  |  yep  | yep  | yep | yep  |
 | image viewer    |  -  | yep  | yep  | yep  |  yep  | yep  | yep | yep  |
 | video player    |  -  | yep  | yep  | yep  |  yep  | yep  | yep | yep  |
-| markdown editor |  -  |  -   | yep  | yep  |  yep  | yep  | yep | yep  |
-| markdown viewer |  -  | yep  | yep  | yep  |  yep  | yep  | yep | yep  |
+| markdown editor |  -  |  -   | `*2` | `*2` |  yep  | yep  | yep | yep  |
+| markdown viewer |  -  | `*2` | `*2` | `*2` |  yep  | yep  | yep | yep  |
 | play mp3/m4a    |  -  | yep  | yep  | yep  |  yep  | yep  | yep | yep  |
 | play ogg/opus   |  -  |  -   |  -   |  -   |  yep  | yep  | `*3` | yep |
 | **= feature =** | ie6 | ie9  | ie10 | ie11 | ff 52 | c 49 | iOS | Andr |
@@ -1544,6 +1601,7 @@ TLDR: yes
 * internet explorer 6 through 8 behave the same
 * firefox 52 and chrome 49 are the final winxp versions
 * `*1` yes, but extremely slow (ie10: `1 MiB/s`, ie11: `270 KiB/s`)
+* `*2` only able to do plaintext documents (no markdown rendering)
 * `*3` iOS 11 and newer, opus only, and requires FFmpeg on the server

 quick summary of more eccentric web-browsers trying to view a directory index:
@@ -1596,6 +1654,10 @@ interact with copyparty using non-browser clients

 * sharex (screenshot utility): see [./contrib/sharex.sxcu](contrib/#sharexsxcu)

+* contextlet (web browser integration); see [contrib contextlet](contrib/#send-to-cppcontextletjson)
+
+* [igloo irc](https://iglooirc.com/): Method: `post` Host: `https://you.com/up/?want=url&pw=hunter2` Multipart: `yes` File parameter: `f`
+
 copyparty returns a truncated sha512sum of your PUT/POST as base64; you can generate the same checksum locally to verify uplaods:

    b512(){ printf "$((sha512sum||shasum -a512)|sed -E 's/ .*//;s/(..)/\\x\1/g')"|base64|tr '+/' '-_'|head -c44;}
@@ -1614,7 +1676,7 @@ the commandline uploader [u2c.py](https://github.com/9001/copyparty/tree/hovudst

 alternatively there is [rclone](./docs/rclone.md) which allows for bidirectional sync and is *way* more flexible (stream files straight from sftp/s3/gcs to copyparty, ...), although there is no integrity check and it won't work with files over 100 MiB if copyparty is behind cloudflare

-* starting from rclone v1.63 (currently [in beta](https://beta.rclone.org/?filter=latest)), rclone will also be faster than u2c.py
+* starting from rclone v1.63, rclone is faster than u2c.py on low-latency connections


 ## mount as drive
@@ -1623,7 +1685,7 @@ a remote copyparty server as a local filesystem;  go to the control-panel and cl

 alternatively, some alternatives roughly sorted by speed (unreproducible benchmark), best first:

-* [rclone-webdav](./docs/rclone.md) (25s), read/WRITE ([v1.63-beta](https://beta.rclone.org/?filter=latest))
+* [rclone-webdav](./docs/rclone.md) (25s), read/WRITE (rclone v1.63 or later)
 * [rclone-http](./docs/rclone.md) (26s), read-only
 * [partyfuse.py](./bin/#partyfusepy) (35s), read-only
 * [rclone-ftp](./docs/rclone.md) (47s), read/WRITE
@@ -1663,6 +1725,7 @@ below are some tweaks roughly ordered by usefulness:

 * `-q` disables logging and can help a bunch, even when combined with `-lo` to redirect logs to file
 * `--hist` pointing to a fast location (ssd) will make directory listings and searches faster when `-e2d` or `-e2t` is set
+  * and also makes thumbnails load faster, regardless of e2d/e2t
 * `--no-hash .` when indexing a network-disk if you don't care about the actual filehashes and only want the names/tags searchable
 * `--no-htp --hash-mt=0 --mtag-mt=1 --th-mt=1` minimizes the number of threads; can help in some eccentric environments (like the vscode debugger)
 * `-j0` enables multiprocessing (actual multithreading), can reduce latency to `20+80/numCores` percent and generally improve performance in cpu-intensive workloads, for example:
@@ -1670,7 +1733,7 @@ below are some tweaks roughly ordered by usefulness:
  * simultaneous downloads and uploads saturating a 20gbps connection
  * if `-e2d` is enabled, `-j2` gives 4x performance for directory listings; `-j4` gives 16x
  
-  ...however it adds an overhead to internal communication so it might be a net loss, see if it works 4 u
+  ...however it also increases the server/filesystem/HDD load during uploads, and adds an overhead to internal communication, so it is usually a better idea to don't
 * using [pypy](https://www.pypy.org/) instead of [cpython](https://www.python.org/) *can* be 70% faster for some workloads, but slower for many others
  * and pypy can sometimes crash on startup with `-j0` (TODO make issue)

@@ -1679,7 +1742,7 @@ below are some tweaks roughly ordered by usefulness:

 when uploading files,

-* chrome is recommended, at least compared to firefox:
+* chrome is recommended (unfortunately), at least compared to firefox:
  * up to 90% faster when hashing, especially on SSDs
  * up to 40% faster when uploading over extremely fast internets
  * but [u2c.py](https://github.com/9001/copyparty/blob/hovudstraum/bin/u2c.py) can be 40% faster than chrome again
@@ -1881,7 +1944,7 @@ can be convenient on machines where installing python is problematic, however is

 meanwhile [copyparty-sfx.py](https://github.com/9001/copyparty/releases/latest/download/copyparty-sfx.py) instead relies on your system python which gives better performance and will stay safe as long as you keep your python install up-to-date

-then again, if you are already into downloading shady binaries from the internet, you may also want my [minimal builds](./scripts/pyinstaller#ffmpeg) of [ffmpeg](https://ocv.me/stuff/bin/ffmpeg.exe) and [ffprobe](https://ocv.me/stuff/bin/ffprobe.exe) which enables copyparty to extract multimedia-info, do audio-transcoding, and thumbnails/spectrograms/waveforms, however it's much better to instead grab a [recent official build](https://github.com/BtbN/FFmpeg-Builds/releases/download/latest/ffmpeg-master-latest-win64-gpl.zip) every once ina while if you can afford the size
+then again, if you are already into downloading shady binaries from the internet, you may also want my [minimal builds](./scripts/pyinstaller#ffmpeg) of [ffmpeg](https://ocv.me/stuff/bin/ffmpeg.exe) and [ffprobe](https://ocv.me/stuff/bin/ffprobe.exe) which enables copyparty to extract multimedia-info, do audio-transcoding, and thumbnails/spectrograms/waveforms, however it's much better to instead grab a [recent official build](https://www.gyan.dev/ffmpeg/builds/ffmpeg-git-full.7z) every once ina while if you can afford the size


 # install on android
@@ -1901,7 +1964,12 @@ if you want thumbnails (photos+videos) and you're okay with spending another 132

 # reporting bugs

-ideas for context to include in bug reports
+ideas for context to include, and where to submit them
+
+please get in touch using any of the following URLs:
+* https://github.com/9001/copyparty/ **(primary)**
+* https://gitlab.com/9001/copyparty/ *(mirror)*
+* https://codeberg.org/9001/copyparty *(mirror)*

 in general, commandline arguments (and config file if any)

@@ -1916,3 +1984,6 @@ if there's a wall of base64 in the log (thread stacks) then please include that,
 # devnotes

 for build instructions etc, see [./docs/devnotes.md](./docs/devnotes.md)
+
+see [./docs/TODO.md](./docs/TODO.md) for planned features / fixes / changes
+
--- a/bin/u2c.py
+++ b/bin/u2c.py
@@ -1,8 +1,8 @@
 #!/usr/bin/env python3
 from __future__ import print_function, unicode_literals

-S_VERSION = "1.12"
-S_BUILD_DT = "2023-12-08"
+S_VERSION = "1.15"
+S_BUILD_DT = "2024-02-18"

 """
 u2c.py: upload to copyparty
@@ -29,7 +29,7 @@ import platform
 import threading
 import datetime

-EXE = sys.executable.endswith("exe")
+EXE = bool(getattr(sys, "frozen", False))

 try:
    import argparse
@@ -560,8 +560,11 @@ def handshake(ar, file, search):
    }
    if search:
        req["srch"] = 1
-    elif ar.dr:
-        req["replace"] = True
+    else:
+        if ar.touch:
+            req["umod"] = True
+        if ar.dr:
+            req["replace"] = True

    headers = {"Content-Type": "text/plain"}  # <=1.5.1 compat
    if pw:
@@ -843,12 +846,12 @@ class Ctl(object):
                txt = " "

            if not self.up_br:
-                spd = self.hash_b / (time.time() - self.t0)
-                eta = (self.nbytes - self.hash_b) / (spd + 1)
+                spd = self.hash_b / ((time.time() - self.t0) or 1)
+                eta = (self.nbytes - self.hash_b) / (spd or 1)
            else:
-                spd = self.up_br / (time.time() - self.t0_up)
+                spd = self.up_br / ((time.time() - self.t0_up) or 1)
                spd = self.spd = (self.spd or spd) * 0.9 + spd * 0.1
-                eta = (self.nbytes - self.up_b) / (spd + 1)
+                eta = (self.nbytes - self.up_b) / (spd or 1)

            spd = humansize(spd)
            self.eta = str(datetime.timedelta(seconds=int(eta)))
@@ -874,6 +877,8 @@ class Ctl(object):
        self.st_hash = [file, ofs]

    def hasher(self):
+        ptn = re.compile(self.ar.x.encode("utf-8"), re.I) if self.ar.x else None
+        sep = "{0}".format(os.sep).encode("ascii")
        prd = None
        ls = {}
        for top, rel, inf in self.filegen:
@@ -906,7 +911,12 @@ class Ctl(object):
                    if self.ar.drd:
                        dp = os.path.join(top, rd)
                        lnodes = set(os.listdir(dp))
-                        bnames = [x for x in ls if x not in lnodes]
+                        if ptn:
+                            zs = dp.replace(sep, b"/").rstrip(b"/") + b"/"
+                            zls = [zs + x for x in lnodes]
+                            zls = [x for x in zls if not ptn.match(x)]
+                            lnodes = [x.split(b"/")[-1] for x in zls]
+                        bnames = [x for x in ls if x not in lnodes and x != b".hist"]
                        vpath = self.ar.url.split("://")[-1].split("/", 1)[-1]
                        names = [x.decode("utf-8", "replace") for x in bnames]
                        locs = [vpath + srd + "/" + x for x in names]
@@ -1129,6 +1139,7 @@ source file/folder selection uses rsync syntax, meaning that:
    ap.add_argument("-s", action="store_true", help="file-search (disables upload)")
    ap.add_argument("-x", type=unicode, metavar="REGEX", default="", help="skip file if filesystem-abspath matches REGEX, example: '.*/\\.hist/.*'")
    ap.add_argument("--ok", action="store_true", help="continue even if some local files are inaccessible")
+    ap.add_argument("--touch", action="store_true", help="if last-modified timestamps differ, push local to server (need write+delete perms)")
    ap.add_argument("--version", action="store_true", help="show version and exit")

    ap = app.add_argument_group("compatibility")
--- a/contrib/README.md
+++ b/contrib/README.md
@@ -16,11 +16,13 @@
 * sharex config file to upload screenshots and grab the URL
 * `RequestURL`: full URL to the target folder
 * `pw`: password (remove the `pw` line if anon-write)
+* the `act:bput` thing is optional since copyparty v1.9.29
+* using an older sharex version, maybe sharex v12.1.1 for example? dw fam i got your back 👉😎👉 [`sharex12.sxcu`](sharex12.sxcu)

-however if your copyparty is behind a reverse-proxy, you may want to use [`sharex-html.sxcu`](sharex-html.sxcu) instead:
-* `RequestURL`: full URL to the target folder
-* `URL`: full URL to the root folder (with trailing slash) followed by `$regex:1|1$`
-* `pw`: password (remove `Parameters` if anon-write)
+### [`send-to-cpp.contextlet.json`](send-to-cpp.contextlet.json)
+* browser integration, kind of? custom rightclick actions and stuff
+* rightclick a pic and send it to copyparty straight from your browser
+* for the [contextlet](https://addons.mozilla.org/en-US/firefox/addon/contextlets/) firefox extension

 ### [`media-osd-bgone.ps1`](media-osd-bgone.ps1)
 * disables the [windows OSD popup](https://user-images.githubusercontent.com/241032/122821375-0e08df80-d2dd-11eb-9fd9-184e8aacf1d0.png) (the thing on the left) which appears every time you hit media hotkeys to adjust volume or change song while playing music with the copyparty web-ui, or most other audio players really
--- a/contrib/package/arch/PKGBUILD
+++ b/contrib/package/arch/PKGBUILD
@@ -1,8 +1,8 @@
 # Maintainer: icxes <dev.null@need.moe>
 pkgname=copyparty
-pkgver="1.9.28"
+pkgver="1.10.2"
 pkgrel=1
-pkgdesc="File server with accelerated resumable uploads, dedup, WebDAV, FTP, zeroconf, media indexer, thumbnails++"
+pkgdesc="File server with accelerated resumable uploads, dedup, WebDAV, FTP, TFTP, zeroconf, media indexer, thumbnails++"
 arch=("any")
 url="https://github.com/9001/${pkgname}"
 license=('MIT')
@@ -21,7 +21,7 @@ optdepends=("ffmpeg: thumbnails for videos, images (slower) and audio, music tag
 )
 source=("https://github.com/9001/${pkgname}/releases/download/v${pkgver}/${pkgname}-${pkgver}.tar.gz")
 backup=("etc/${pkgname}.d/init" )
-sha256sums=("0134f2298b8793f3a8a0a9ba6e7e5a5bf3dc12da5501b100c2f17d061f167fb9")
+sha256sums=("001be979a0fdd8ace7d48cab79a137c13b87b78be35fc9633430f45a2831c3ed")

 build() {
    cd "${srcdir}/${pkgname}-${pkgver}"
--- a/contrib/package/nix/copyparty/pin.json
+++ b/contrib/package/nix/copyparty/pin.json
@@ -1,5 +1,5 @@
 {
-    "url": "https://github.com/9001/copyparty/releases/download/v1.9.28/copyparty-sfx.py",
-    "version": "1.9.28",
-    "hash": "sha256-3pHlJYmEu0C/aHPN8JL9fb6tEHYpB3/gON7SJko3tUY="
+    "url": "https://github.com/9001/copyparty/releases/download/v1.10.2/copyparty-sfx.py",
+    "version": "1.10.2",
+    "hash": "sha256-O9lkN30gy3kwIH+39O4dN7agZPkuH36BDTk8mEsQCVg="
 }
--- a/contrib/send-to-cpp.contextlet.json
+++ b/contrib/send-to-cpp.contextlet.json
@@ -0,0 +1,11 @@
+{
+    "code": "// https://addons.mozilla.org/en-US/firefox/addon/contextlets/\n// https://github.com/davidmhammond/contextlets\n\nvar url = 'http://partybox.local:3923/';\nvar pw = 'wark';\n\nvar xhr = new XMLHttpRequest();\nxhr.msg = this.info.linkUrl || this.info.srcUrl;\nxhr.open('POST', url, true);\nxhr.setRequestHeader('Content-Type', 'application/x-www-form-urlencoded;charset=UTF-8');\nxhr.setRequestHeader('PW', pw);\nxhr.send('msg=' + xhr.msg);\n",
+    "contexts": [
+        "link"
+    ],
+    "icons": null,
+    "patterns": "",
+    "scope": "background",
+    "title": "send to cpp",
+    "type": "normal"
+}
--- a/contrib/sharex-html.sxcu
+++ b/contrib/sharex-html.sxcu
@@ -1,19 +0,0 @@
-{
-  "Version": "13.5.0",
-  "Name": "copyparty-html",
-  "DestinationType": "ImageUploader",
-  "RequestMethod": "POST",
-  "RequestURL": "http://127.0.0.1:3923/sharex",
-  "Parameters": {
-    "pw": "wark"
-  },
-  "Body": "MultipartFormData",
-  "Arguments": {
-    "act": "bput"
-  },
-  "FileFormName": "f",
-  "RegexList": [
-    "bytes // <a href=\"/([^\"]+)\""
-  ],
-  "URL": "http://127.0.0.1:3923/$regex:1|1$"
-}
--- a/contrib/sharex.sxcu
+++ b/contrib/sharex.sxcu
@@ -1,17 +1,19 @@
 {
-  "Version": "13.5.0",
+  "Version": "15.0.0",
  "Name": "copyparty",
  "DestinationType": "ImageUploader",
  "RequestMethod": "POST",
  "RequestURL": "http://127.0.0.1:3923/sharex",
  "Parameters": {
-    "pw": "wark",
    "j": null
  },
+  "Headers": {
+    "pw": "PUT_YOUR_PASSWORD_HERE_MY_DUDE"
+  },
  "Body": "MultipartFormData",
  "Arguments": {
    "act": "bput"
  },
  "FileFormName": "f",
-  "URL": "$json:files[0].url$"
+  "URL": "{json:files[0].url}"
 }
--- a/contrib/sharex12.sxcu
+++ b/contrib/sharex12.sxcu
@@ -0,0 +1,13 @@
+{
+  "Name": "copyparty",
+  "DestinationType": "ImageUploader, TextUploader, FileUploader",
+  "RequestURL": "http://127.0.0.1:3923/sharex",
+  "FileFormName": "f",
+  "Arguments": {
+    "act": "bput"
+  },
+  "Headers": {
+    "accept": "url",
+    "pw": "PUT_YOUR_PASSWORD_HERE_MY_DUDE"
+  }
+}
--- a/copyparty/main.py
+++ b/copyparty/main.py
@@ -20,17 +20,31 @@ import time
 import traceback
 import uuid

-from .__init__ import ANYWIN, CORES, EXE, PY2, VT100, WINDOWS, E, EnvParams, unicode
+from .__init__ import (
+    ANYWIN,
+    CORES,
+    EXE,
+    MACOS,
+    PY2,
+    VT100,
+    WINDOWS,
+    E,
+    EnvParams,
+    unicode,
+)
 from .__version__ import CODENAME, S_BUILD_DT, S_VERSION
 from .authsrv import expand_config_file, split_cfg_ln, upgrade_cfg_fmt
 from .cfg import flagcats, onedash
 from .svchub import SvcHub
 from .util import (
+    APPLESAN_TXT,
    DEF_EXP,
    DEF_MTE,
    DEF_MTH,
    IMPLICATIONS,
    JINJA_VER,
+    PARTFTPY_VER,
+    PY_DESC,
    PYFTPD_VER,
    SQLITE_VER,
    UNPLICATIONS,
@@ -38,7 +52,6 @@ from .util import (
    ansi_re,
    dedent,
    min_ex,
-    py_desc,
    pybin,
    termsize,
    wrap,
@@ -382,7 +395,7 @@ def configure_ssl_ciphers(al: argparse.Namespace) -> None:

 def args_from_cfg(cfg_path: str) -> list[str]:
    lines: list[str] = []
-    expand_config_file(lines, cfg_path, "")
+    expand_config_file(None, lines, cfg_path, "")
    lines = upgrade_cfg_fmt(None, argparse.Namespace(vc=False), lines, "")

    ret: list[str] = []
@@ -490,6 +503,10 @@ def get_sects():
                * "\033[33mperm\033[0m" is "permissions,username1,username2,..."
                * "\033[32mvolflag\033[0m" is config flags to set on this volume

+            --grp takes groupname:username1,username2,...
+            and groupnames can be used instead of usernames in -v
+            by prefixing the groupname with %
+
            list of permissions:
              "r" (read):   list folder contents, download files
              "w" (write):  upload files; need "r" to see the uploads
@@ -826,7 +843,8 @@ def add_general(ap, nc, srvname):
    ap2.add_argument("-nc", metavar="NUM", type=int, default=nc, help="max num clients")
    ap2.add_argument("-j", metavar="CORES", type=int, default=1, help="max num cpu cores, 0=all")
    ap2.add_argument("-a", metavar="ACCT", type=u, action="append", help="add account, \033[33mUSER\033[0m:\033[33mPASS\033[0m; example [\033[32med:wark\033[0m]")
-    ap2.add_argument("-v", metavar="VOL", type=u, action="append", help="add volume, \033[33mSRC\033[0m:\033[33mDST\033[0m:\033[33mFLAG\033[0m; examples [\033[32m.::r\033[0m], [\033[32m/mnt/nas/music:/music:r:aed\033[0m]")
+    ap2.add_argument("-v", metavar="VOL", type=u, action="append", help="add volume, \033[33mSRC\033[0m:\033[33mDST\033[0m:\033[33mFLAG\033[0m; examples [\033[32m.::r\033[0m], [\033[32m/mnt/nas/music:/music:r:aed\033[0m], see --help-accounts")
+    ap2.add_argument("--grp", metavar="G:N,N", type=u, action="append", help="add group, \033[33mNAME\033[0m:\033[33mUSER1\033[0m,\033[33mUSER2\033[0m,\033[33m...\033[0m; example [\033[32madmins:ed,foo,bar\033[0m]")
    ap2.add_argument("-ed", action="store_true", help="enable the ?dots url parameter / client option which allows clients to see dotfiles / hidden files (volflag=dots)")
    ap2.add_argument("--urlform", metavar="MODE", type=u, default="print,get", help="how to handle url-form POSTs; see \033[33m--help-urlform\033[0m")
    ap2.add_argument("--wintitle", metavar="TXT", type=u, default="cpp @ $pub", help="server terminal title, for example [\033[32m$ip-10.1.2.\033[0m] or [\033[32m$ip-]")
@@ -847,11 +865,18 @@ def add_qr(ap, tty):
    ap2.add_argument("--qrz", metavar="N", type=int, default=0, help="[\033[32m1\033[0m]=1x, [\033[32m2\033[0m]=2x, [\033[32m0\033[0m]=auto (try [\033[32m2\033[0m] on broken fonts)")


+def add_fs(ap):
+    ap2 = ap.add_argument_group("filesystem options")
+    rm_re_def = "5/0.1" if ANYWIN else "0/0"
+    ap2.add_argument("--rm-retry", metavar="T/R", type=u, default=rm_re_def, help="if a file cannot be deleted because it is busy, continue trying for \033[33mT\033[0m seconds, retry every \033[33mR\033[0m seconds; disable with 0/0 (volflag=rm_retry)")
+
+
 def add_upload(ap):
    ap2 = ap.add_argument_group('upload options')
    ap2.add_argument("--dotpart", action="store_true", help="dotfile incomplete uploads, hiding them from clients unless \033[33m-ed\033[0m")
    ap2.add_argument("--plain-ip", action="store_true", help="when avoiding filename collisions by appending the uploader's ip to the filename: append the plaintext ip instead of salting and hashing the ip")
    ap2.add_argument("--unpost", metavar="SEC", type=int, default=3600*12, help="grace period where uploads can be deleted by the uploader, even without delete permissions; 0=disabled, default=12h")
+    ap2.add_argument("--u2abort", metavar="NUM", type=int, default=1, help="clients can abort incomplete uploads by using the unpost tab (requires \033[33m-e2d\033[0m). [\033[32m0\033[0m] = never allowed (disable feature), [\033[32m1\033[0m] = allow if client has the same IP as the upload AND is using the same account, [\033[32m2\033[0m] = just check the IP, [\033[32m3\033[0m] = just check account-name (volflag=u2abort)")
    ap2.add_argument("--blank-wt", metavar="SEC", type=int, default=300, help="file write grace period (any client can write to a blank file last-modified more recently than \033[33mSEC\033[0m seconds ago)")
    ap2.add_argument("--reg-cap", metavar="N", type=int, default=38400, help="max number of uploads to keep in memory when running without \033[33m-e2d\033[0m; roughly 1 MiB RAM per 600")
    ap2.add_argument("--no-fpool", action="store_true", help="disable file-handle pooling -- instead, repeatedly close and reopen files during upload (bad idea to enable this on windows and/or cow filesystems)")
@@ -870,7 +895,7 @@ def add_upload(ap):
    ap2.add_argument("--df", metavar="GiB", type=float, default=0, help="ensure \033[33mGiB\033[0m free disk space by rejecting upload requests")
    ap2.add_argument("--sparse", metavar="MiB", type=int, default=4, help="windows-only: minimum size of incoming uploads through up2k before they are made into sparse files")
    ap2.add_argument("--turbo", metavar="LVL", type=int, default=0, help="configure turbo-mode in up2k client; [\033[32m-1\033[0m] = forbidden/always-off, [\033[32m0\033[0m] = default-off and warn if enabled, [\033[32m1\033[0m] = default-off, [\033[32m2\033[0m] = on, [\033[32m3\033[0m] = on and disable datecheck")
-    ap2.add_argument("--u2j", metavar="JOBS", type=int, default=2, help="web-client: number of file chunks to upload in parallel; 1 or 2 is good for low-latency (same-country) connections, 4-8 for android clients, 16-32 for cross-atlantic (max=64)")
+    ap2.add_argument("--u2j", metavar="JOBS", type=int, default=2, help="web-client: number of file chunks to upload in parallel; 1 or 2 is good for low-latency (same-country) connections, 4-8 for android clients, 16 for cross-atlantic (max=64)")
    ap2.add_argument("--u2sort", metavar="TXT", type=u, default="s", help="upload order; [\033[32ms\033[0m]=smallest-first, [\033[32mn\033[0m]=alphabetical, [\033[32mfs\033[0m]=force-s, [\033[32mfn\033[0m]=force-n -- alphabetical is a bit slower on fiber/LAN but makes it easier to eyeball if everything went fine")
    ap2.add_argument("--write-uplog", action="store_true", help="write POST reports to textfiles in working-directory")

@@ -882,8 +907,8 @@ def add_network(ap):
    ap2.add_argument("--ll", action="store_true", help="include link-local IPv4/IPv6 in mDNS replies, even if the NIC has routable IPs (breaks some mDNS clients)")
    ap2.add_argument("--rproxy", metavar="DEPTH", type=int, default=1, help="which ip to associate clients with; [\033[32m0\033[0m]=tcp, [\033[32m1\033[0m]=origin (first x-fwd, unsafe), [\033[32m2\033[0m]=outermost-proxy, [\033[32m3\033[0m]=second-proxy, [\033[32m-1\033[0m]=closest-proxy")
    ap2.add_argument("--xff-hdr", metavar="NAME", type=u, default="x-forwarded-for", help="if reverse-proxied, which http header to read the client's real ip from")
-    ap2.add_argument("--xff-src", metavar="IP", type=u, default="127., ::1", help="comma-separated list of trusted reverse-proxy IPs; only accept the real-ip header (\033[33m--xff-hdr\033[0m) if the incoming connection is from an IP starting with either of these. Can be disabled with [\033[32many\033[0m] if you are behind cloudflare (or similar) and are using \033[32m--xff-hdr=cf-connecting-ip\033[0m (or similar)")
-    ap2.add_argument("--ipa", metavar="PREFIX", type=u, default="", help="only accept connections from IP-addresses starting with \033[33mPREFIX\033[0m; example: [\033[32m127., 10.89., 192.168.\033[0m]")
+    ap2.add_argument("--xff-src", metavar="CIDR", type=u, default="127.0.0.0/8, ::1/128", help="comma-separated list of trusted reverse-proxy CIDRs; only accept the real-ip header (\033[33m--xff-hdr\033[0m) and IdP headers if the incoming connection is from an IP within either of these subnets. Specify [\033[32mlan\033[0m] to allow all LAN / private / non-internet IPs. Can be disabled with [\033[32many\033[0m] if you are behind cloudflare (or similar) and are using \033[32m--xff-hdr=cf-connecting-ip\033[0m (or similar)")
+    ap2.add_argument("--ipa", metavar="CIDR", type=u, default="", help="only accept connections from IP-addresses inside \033[33mCIDR\033[0m; examples: [\033[32mlan\033[0m] or [\033[32m10.89.0.0/16, 192.168.33.0/24\033[0m]")
    ap2.add_argument("--rp-loc", metavar="PATH", type=u, default="", help="if reverse-proxying on a location instead of a dedicated domain/subdomain, provide the base location here; example: [\033[32m/foo/bar\033[0m]")
    if ANYWIN:
        ap2.add_argument("--reuseaddr", action="store_true", help="set reuseaddr on listening sockets on windows; allows rapid restart of copyparty at the expense of being able to accidentally start multiple instances")
@@ -930,8 +955,9 @@ def add_cert(ap, cert_path):
 def add_auth(ap):
    ap2 = ap.add_argument_group('IdP / identity provider / user authentication options')
    ap2.add_argument("--idp-h-usr", metavar="HN", type=u, default="", help="bypass the copyparty authentication checks and assume the request-header \033[33mHN\033[0m contains the username of the requesting user (for use with authentik/oauth/...)\n\033[1;31mWARNING:\033[0m if you enable this, make sure clients are unable to specify this header themselves; must be washed away and replaced by a reverse-proxy")
-    return
    ap2.add_argument("--idp-h-grp", metavar="HN", type=u, default="", help="assume the request-header \033[33mHN\033[0m contains the groupname of the requesting user; can be referenced in config files for group-based access control")
+    ap2.add_argument("--idp-h-key", metavar="HN", type=u, default="", help="optional but recommended safeguard; your reverse-proxy will insert a secret header named \033[33mHN\033[0m into all requests, and the other IdP headers will be ignored if this header is not present")
+    ap2.add_argument("--idp-gsep", metavar="RE", type=u, default="|:;+,", help="if there are multiple groups in \033[33m--idp-h-grp\033[0m, they are separated by one of the characters in \033[33mRE\033[0m")


 def add_zeroconf(ap):
@@ -975,12 +1001,12 @@ def add_zc_ssdp(ap):


 def add_ftp(ap):
-    ap2 = ap.add_argument_group('FTP options')
+    ap2 = ap.add_argument_group('FTP options (TCP only)')
    ap2.add_argument("--ftp", metavar="PORT", type=int, help="enable FTP server on \033[33mPORT\033[0m, for example \033[32m3921")
    ap2.add_argument("--ftps", metavar="PORT", type=int, help="enable FTPS server on \033[33mPORT\033[0m, for example \033[32m3990")
    ap2.add_argument("--ftpv", action="store_true", help="verbose")
    ap2.add_argument("--ftp4", action="store_true", help="only listen on IPv4")
-    ap2.add_argument("--ftp-ipa", metavar="PFX", type=u, default="", help="only accept connections from IP-addresses starting with \033[33mPFX\033[0m; specify [\033[32many\033[0m] to disable inheriting \033[33m--ipa\033[0m. Example: [\033[32m127., 10.89., 192.168.\033[0m]")
+    ap2.add_argument("--ftp-ipa", metavar="CIDR", type=u, default="", help="only accept connections from IP-addresses inside \033[33mCIDR\033[0m; specify [\033[32many\033[0m] to disable inheriting \033[33m--ipa\033[0m. Examples: [\033[32mlan\033[0m] or [\033[32m10.89.0.0/16, 192.168.33.0/24\033[0m]")
    ap2.add_argument("--ftp-wt", metavar="SEC", type=int, default=7, help="grace period for resuming interrupted uploads (any client can write to any file last-modified more recently than \033[33mSEC\033[0m seconds ago)")
    ap2.add_argument("--ftp-nat", metavar="ADDR", type=u, help="the NAT address to use for passive connections")
    ap2.add_argument("--ftp-pr", metavar="P-P", type=u, help="the range of TCP ports to use for passive connections, for example \033[32m12000-13000")
@@ -995,6 +1021,18 @@ def add_webdav(ap):
    ap2.add_argument("--dav-auth", action="store_true", help="force auth for all folders (required by davfs2 when only some folders are world-readable) (volflag=davauth)")


+def add_tftp(ap):
+    ap2 = ap.add_argument_group('TFTP options (UDP only)')
+    ap2.add_argument("--tftp", metavar="PORT", type=int, help="enable TFTP server on \033[33mPORT\033[0m, for example \033[32m69 \033[0mor \033[32m3969")
+    ap2.add_argument("--tftpv", action="store_true", help="verbose")
+    ap2.add_argument("--tftpvv", action="store_true", help="verboser")
+    ap2.add_argument("--tftp-no-fast", action="store_true", help="debug: disable optimizations")
+    ap2.add_argument("--tftp-lsf", metavar="PTN", type=u, default="\\.?(dir|ls)(\\.txt)?", help="return a directory listing if a file with this name is requested and it does not exist; defaults matches .ls, dir, .dir.txt, ls.txt, ...")
+    ap2.add_argument("--tftp-nols", action="store_true", help="if someone tries to download a directory, return an error instead of showing its directory listing")
+    ap2.add_argument("--tftp-ipa", metavar="CIDR", type=u, default="", help="only accept connections from IP-addresses inside \033[33mCIDR\033[0m; specify [\033[32many\033[0m] to disable inheriting \033[33m--ipa\033[0m. Examples: [\033[32mlan\033[0m] or [\033[32m10.89.0.0/16, 192.168.33.0/24\033[0m]")
+    ap2.add_argument("--tftp-pr", metavar="P-P", type=u, help="the range of UDP ports to use for data transfer, for example \033[32m12000-13000")
+
+
 def add_smb(ap):
    ap2 = ap.add_argument_group('SMB/CIFS options')
    ap2.add_argument("--smb", action="store_true", help="enable smb (read-only) -- this requires running copyparty as root on linux and macos unless \033[33m--smb-port\033[0m is set above 1024 and your OS does port-forwarding from 445 to that.\n\033[1;31mWARNING:\033[0m this protocol is DANGEROUS and buggy! Never expose to the internet!")
@@ -1138,7 +1176,9 @@ def add_thumbnail(ap):
    ap2.add_argument("--th-size", metavar="WxH", default="320x256", help="thumbnail res (volflag=thsize)")
    ap2.add_argument("--th-mt", metavar="CORES", type=int, default=CORES, help="num cpu cores to use for generating thumbnails")
    ap2.add_argument("--th-convt", metavar="SEC", type=float, default=60, help="conversion timeout in seconds (volflag=convt)")
-    ap2.add_argument("--th-no-crop", action="store_true", help="dynamic height; show full image by default (client can override in UI) (volflag=nocrop)")
+    ap2.add_argument("--th-ram-max", metavar="GB", type=float, default=6, help="max memory usage (GiB) permitted by thumbnailer; not very accurate")
+    ap2.add_argument("--th-crop", metavar="TXT", type=u, default="y", help="crop thumbnails to 4:3 or keep dynamic height; client can override in UI unless force. [\033[32mfy\033[0m]=crop, [\033[32mfn\033[0m]=nocrop, [\033[32mfy\033[0m]=force-y, [\033[32mfn\033[0m]=force-n (volflag=crop)")
+    ap2.add_argument("--th-x3", metavar="TXT", type=u, default="n", help="show thumbs at 3x resolution; client can override in UI unless force. [\033[32mfy\033[0m]=yes, [\033[32mfn\033[0m]=no, [\033[32mfy\033[0m]=force-yes, [\033[32mfn\033[0m]=force-no (volflag=th3x)")
    ap2.add_argument("--th-dec", metavar="LIBS", default="vips,pil,ff", help="image decoders, in order of preference")
    ap2.add_argument("--th-no-jpg", action="store_true", help="disable jpg output")
    ap2.add_argument("--th-no-webp", action="store_true", help="disable webp output")
@@ -1166,6 +1206,7 @@ def add_transcoding(ap):


 def add_db_general(ap, hcores):
+    noidx = APPLESAN_TXT if MACOS else ""
    ap2 = ap.add_argument_group('general db options')
    ap2.add_argument("-e2d", action="store_true", help="enable up2k database, making files searchable + enables upload deduplication")
    ap2.add_argument("-e2ds", action="store_true", help="scan writable folders for new files on startup; sets \033[33m-e2d\033[0m")
@@ -1175,7 +1216,7 @@ def add_db_general(ap, hcores):
    ap2.add_argument("-e2vp", action="store_true", help="on hash mismatch: panic and quit copyparty")
    ap2.add_argument("--hist", metavar="PATH", type=u, help="where to store volume data (db, thumbs) (volflag=hist)")
    ap2.add_argument("--no-hash", metavar="PTN", type=u, help="regex: disable hashing of matching absolute-filesystem-paths during e2ds folder scans (volflag=nohash)")
-    ap2.add_argument("--no-idx", metavar="PTN", type=u, help="regex: disable indexing of matching absolute-filesystem-paths during e2ds folder scans (volflag=noidx)")
+    ap2.add_argument("--no-idx", metavar="PTN", type=u, default=noidx, help="regex: disable indexing of matching absolute-filesystem-paths during e2ds folder scans (volflag=noidx)")
    ap2.add_argument("--no-dhash", action="store_true", help="disable rescan acceleration; do full database integrity check -- makes the db ~5%% smaller and bootup/rescans 3~10x slower")
    ap2.add_argument("--re-dhash", action="store_true", help="rebuild the cache if it gets out of sync (for example crash on startup during metadata scanning)")
    ap2.add_argument("--no-forget", action="store_true", help="never forget indexed files, even when deleted from disk -- makes it impossible to ever upload the same file twice -- only useful for offloading uploads to a cloud service or something (volflag=noforget)")
@@ -1235,6 +1276,7 @@ def add_ui(ap, retry):
    ap2.add_argument("--bname", metavar="TXT", type=u, default="--name", help="server name (displayed in filebrowser document title)")
    ap2.add_argument("--pb-url", metavar="URL", type=u, default="https://github.com/9001/copyparty", help="powered-by link; disable with \033[33m-np\033[0m")
    ap2.add_argument("--ver", action="store_true", help="show version on the control panel (incompatible with \033[33m-nb\033[0m)")
+    ap2.add_argument("--k304", metavar="NUM", type=int, default=0, help="configure the option to enable/disable k304 on the controlpanel (workaround for buggy reverse-proxies); [\033[32m0\033[0m] = hidden and default-off, [\033[32m1\033[0m] = visible and default-off, [\033[32m2\033[0m] = visible and default-on")
    ap2.add_argument("--md-sbf", metavar="FLAGS", type=u, default="downloads forms popups scripts top-navigation-by-user-activation", help="list of capabilities to ALLOW for README.md docs (volflag=md_sbf); see https://developer.mozilla.org/en-US/docs/Web/HTML/Element/iframe#attr-sandbox")
    ap2.add_argument("--lg-sbf", metavar="FLAGS", type=u, default="downloads forms popups scripts top-navigation-by-user-activation", help="list of capabilities to ALLOW for prologue/epilogue docs  (volflag=lg_sbf)")
    ap2.add_argument("--no-sb-md", action="store_true", help="don't sandbox README.md documents (volflags: no_sb_md | sb_md)")
@@ -1294,6 +1336,7 @@ def run_argparse(
    add_zeroconf(ap)
    add_zc_mdns(ap)
    add_zc_ssdp(ap)
+    add_fs(ap)
    add_upload(ap)
    add_db_general(ap, hcores)
    add_db_metadata(ap)
@@ -1301,6 +1344,7 @@ def run_argparse(
    add_transcoding(ap)
    add_ftp(ap)
    add_webdav(ap)
+    add_tftp(ap)
    add_smb(ap)
    add_safety(ap)
    add_salt(ap, fk_salt, ah_salt)
@@ -1354,15 +1398,16 @@ def main(argv: Optional[list[str]] = None) -> None:
    if argv is None:
        argv = sys.argv

-    f = '\033[36mcopyparty v{} "\033[35m{}\033[36m" ({})\n{}\033[0;36m\n   sqlite v{} | jinja2 v{} | pyftpd v{}\n\033[0m'
+    f = '\033[36mcopyparty v{} "\033[35m{}\033[36m" ({})\n{}\033[0;36m\n   sqlite {} | jinja {} | pyftpd {} | tftp {}\n\033[0m'
    f = f.format(
        S_VERSION,
        CODENAME,
        S_BUILD_DT,
-        py_desc().replace("[", "\033[90m["),
+        PY_DESC.replace("[", "\033[90m["),
        SQLITE_VER,
        JINJA_VER,
        PYFTPD_VER,
+        PARTFTPY_VER,
    )
    lprint(f)

@@ -1394,6 +1439,8 @@ def main(argv: Optional[list[str]] = None) -> None:
    deprecated: list[tuple[str, str]] = [
        ("--salt", "--warksalt"),
        ("--hdr-au-usr", "--idp-h-usr"),
+        ("--idp-h-sep", "--idp-gsep"),
+        ("--th-no-crop", "--th-crop=n"),
    ]
    for dk, nk in deprecated:
        idx = -1
@@ -1524,6 +1571,9 @@ def main(argv: Optional[list[str]] = None) -> None:
    if sys.version_info < (3, 6):
        al.no_scandir = True

+    if not hasattr(os, "sendfile"):
+        al.no_sendfile = True
+
    # signal.signal(signal.SIGINT, sighandler)

    SvcHub(al, dal, argv, "".join(printed)).run()
--- a/copyparty/version.py
+++ b/copyparty/version.py
@@ -1,8 +1,8 @@
 # coding: utf-8

-VERSION = (1, 9, 28)
-CODENAME = "prometheable"
-BUILD_DT = (2023, 12, 31)
+VERSION = (1, 11, 0)
+CODENAME = "You Can (Not) Proceed"
+BUILD_DT = (2024, 3, 15)

 S_VERSION = ".".join(map(str, VERSION))
 S_BUILD_DT = "{0:04d}-{1:02d}-{2:02d}".format(*BUILD_DT)
--- a/copyparty/authsrv.py
+++ b/copyparty/authsrv.py
@@ -18,7 +18,6 @@ from .cfg import flagdescs, permdescs, vf_bmap, vf_cmap, vf_vmap
 from .pwhash import PWHash
 from .util import (
    IMPLICATIONS,
-    META_NOBOTS,
    SQLITE_VER,
    UNPLICATIONS,
    UTC,
@@ -34,6 +33,7 @@ from .util import (
    uncyg,
    undot,
    unhumanize,
+    vsplit,
 )

 if True:  # pylint: disable=using-constant-test
@@ -61,6 +61,10 @@ BAD_CFG = "invalid config; {}".format(SEE_LOG)
 SBADCFG = " ({})".format(BAD_CFG)


+class CfgEx(Exception):
+    pass
+
+
 class AXS(object):
    def __init__(
        self,
@@ -193,7 +197,7 @@ class Lim(object):
            self.dft = int(time.time()) + 300
            self.dfv = get_df(abspath)[0] or 0
            for j in list(self.reg.values()) if self.reg else []:
-                self.dfv -= int(j["size"] / len(j["hash"]) * len(j["need"]))
+                self.dfv -= int(j["size"] / (len(j["hash"]) or 999) * len(j["need"]))

            if already_written:
                sz = 0
@@ -381,7 +385,7 @@ class VFS(object):

    def add(self, src: str, dst: str) -> "VFS":
        """get existing, or add new path to the vfs"""
-        assert not src.endswith("/")  # nosec
+        assert src == "/" or not src.endswith("/")  # nosec
        assert not dst.endswith("/")  # nosec

        if "/" in dst:
@@ -779,7 +783,20 @@ class AuthSrv(object):
        self.warn_anonwrite = warn_anonwrite
        self.line_ctr = 0
        self.indent = ""
-        self.desc = []
+
+        # fwd-decl
+        self.vfs = VFS(log_func, "", "", AXS(), {})
+        self.acct: dict[str, str] = {}
+        self.iacct: dict[str, str] = {}
+        self.grps: dict[str, list[str]] = {}
+        self.re_pwd: Optional[re.Pattern] = None
+
+        # all volumes observed since last restart
+        self.idp_vols: dict[str, str] = {}  # vpath->abspath
+
+        # all users/groups observed since last restart
+        self.idp_accs: dict[str, list[str]] = {}  # username->groupnames
+        self.idp_usr_gh: dict[str, str] = {}  # username->group-header-value (cache)

        self.mutex = threading.Lock()
        self.reload()
@@ -798,6 +815,86 @@ class AuthSrv(object):

        yield prev, True

+    def idp_checkin(
+        self, broker: Optional["BrokerCli"], uname: str, gname: str
+    ) -> bool:
+        if uname in self.acct:
+            return False
+
+        if self.idp_usr_gh.get(uname) == gname:
+            return False
+
+        gnames = [x.strip() for x in self.args.idp_gsep.split(gname)]
+        gnames.sort()
+
+        with self.mutex:
+            self.idp_usr_gh[uname] = gname
+            if self.idp_accs.get(uname) == gnames:
+                return False
+
+            self.idp_accs[uname] = gnames
+
+            t = "reinitializing due to new user from IdP: [%s:%s]"
+            self.log(t % (uname, gnames), 3)
+
+            if not broker:
+                # only true for tests
+                self._reload()
+                return True
+
+        broker.ask("_reload_blocking", False).get()
+        return True
+
+    def _map_volume_idp(
+        self,
+        src: str,
+        dst: str,
+        mount: dict[str, str],
+        daxs: dict[str, AXS],
+        mflags: dict[str, dict[str, Any]],
+        un_gns: dict[str, list[str]],
+    ) -> list[tuple[str, str, str, str]]:
+        ret: list[tuple[str, str, str, str]] = []
+        visited = set()
+        src0 = src  # abspath
+        dst0 = dst  # vpath
+
+        un_gn = [(un, gn) for un, gns in un_gns.items() for gn in gns]
+        if not un_gn:
+            # ensure volume creation if there's no users
+            un_gn = [("", "")]
+
+        for un, gn in un_gn:
+            # if ap/vp has a user/group placeholder, make sure to keep
+            # track so the same user/gruop is mapped when setting perms;
+            # otherwise clear un/gn to indicate it's a regular volume
+
+            src1 = src0.replace("${u}", un or "\n")
+            dst1 = dst0.replace("${u}", un or "\n")
+            if src0 == src1 and dst0 == dst1:
+                un = ""
+
+            src = src1.replace("${g}", gn or "\n")
+            dst = dst1.replace("${g}", gn or "\n")
+            if src == src1 and dst == dst1:
+                gn = ""
+
+            if "\n" in (src + dst):
+                continue
+
+            label = "%s\n%s" % (src, dst)
+            if label in visited:
+                continue
+            visited.add(label)
+
+            src, dst = self._map_volume(src, dst, mount, daxs, mflags)
+            if src:
+                ret.append((src, dst, un, gn))
+                if un or gn:
+                    self.idp_vols[dst] = src
+
+        return ret
+
    def _map_volume(
        self,
        src: str,
@@ -805,7 +902,11 @@ class AuthSrv(object):
        mount: dict[str, str],
        daxs: dict[str, AXS],
        mflags: dict[str, dict[str, Any]],
-    ) -> None:
+    ) -> tuple[str, str]:
+        src = os.path.expandvars(os.path.expanduser(src))
+        src = absreal(src)
+        dst = dst.strip("/")
+
        if dst in mount:
            t = "multiple filesystem-paths mounted at [/{}]:\n  [{}]\n  [{}]"
            self.log(t.format(dst, mount[dst], src), c=1)
@@ -826,6 +927,7 @@ class AuthSrv(object):
        mount[dst] = src
        daxs[dst] = AXS()
        mflags[dst] = {}
+        return (src, dst)

    def _e(self, desc: Optional[str] = None) -> None:
        if not self.args.vc or not self.line_ctr:
@@ -853,32 +955,76 @@ class AuthSrv(object):

        self.log(t.format(self.line_ctr, c, self.indent, ln, desc))

+    def _all_un_gn(
+        self,
+        acct: dict[str, str],
+        grps: dict[str, list[str]],
+    ) -> dict[str, list[str]]:
+        """
+        generate list of all confirmed pairs of username/groupname seen since last restart;
+        in case of conflicting group memberships then it is selected as follows:
+         * any non-zero value from IdP group header
+         * otherwise take --grps / [groups]
+        """
+        ret = {un: gns[:] for un, gns in self.idp_accs.items()}
+        ret.update({zs: [""] for zs in acct if zs not in ret})
+        for gn, uns in grps.items():
+            for un in uns:
+                try:
+                    ret[un].append(gn)
+                except:
+                    ret[un] = [gn]
+
+        return ret
+
    def _parse_config_file(
        self,
        fp: str,
        cfg_lines: list[str],
        acct: dict[str, str],
+        grps: dict[str, list[str]],
        daxs: dict[str, AXS],
        mflags: dict[str, dict[str, Any]],
        mount: dict[str, str],
    ) -> None:
-        self.desc = []
        self.line_ctr = 0

-        expand_config_file(cfg_lines, fp, "")
+        expand_config_file(self.log, cfg_lines, fp, "")
        if self.args.vc:
            lns = ["{:4}: {}".format(n, s) for n, s in enumerate(cfg_lines, 1)]
            self.log("expanded config file (unprocessed):\n" + "\n".join(lns))

        cfg_lines = upgrade_cfg_fmt(self.log, self.args, cfg_lines, fp)

+        # due to IdP, volumes must be parsed after users and groups;
+        # do volumes in a 2nd pass to allow arbitrary order in config files
+        for npass in range(1, 3):
+            if self.args.vc:
+                self.log("parsing config files; pass %d/%d" % (npass, 2))
+            self._parse_config_file_2(cfg_lines, acct, grps, daxs, mflags, mount, npass)
+
+    def _parse_config_file_2(
+        self,
+        cfg_lines: list[str],
+        acct: dict[str, str],
+        grps: dict[str, list[str]],
+        daxs: dict[str, AXS],
+        mflags: dict[str, dict[str, Any]],
+        mount: dict[str, str],
+        npass: int,
+    ) -> None:
+        self.line_ctr = 0
+        all_un_gn = self._all_un_gn(acct, grps)
+
        cat = ""
        catg = "[global]"
        cata = "[accounts]"
+        catgrp = "[groups]"
        catx = "accs:"
        catf = "flags:"
        ap: Optional[str] = None
        vp: Optional[str] = None
+        vols: list[tuple[str, str, str, str]] = []
        for ln in cfg_lines:
            self.line_ctr += 1
            ln = ln.split("  #")[0].strip()
@@ -891,7 +1037,7 @@ class AuthSrv(object):
            subsection = ln in (catx, catf)
            if ln.startswith("[") or subsection:
                self._e()
-                if ap is None and vp is not None:
+                if npass > 1 and ap is None and vp is not None:
                    t = "the first line after [/{}] must be a filesystem path to share on that volume"
                    raise Exception(t.format(vp))

@@ -907,6 +1053,8 @@ class AuthSrv(object):
                    self._l(ln, 6, t)
                elif ln == cata:
                    self._l(ln, 5, "begin user-accounts section")
+                elif ln == catgrp:
+                    self._l(ln, 5, "begin user-groups section")
                elif ln.startswith("[/"):
                    vp = ln[1:-1].strip("/")
                    self._l(ln, 2, "define volume at URL [/{}]".format(vp))
@@ -943,15 +1091,39 @@ class AuthSrv(object):
                    raise Exception(t + SBADCFG)
                continue

+            if cat == catgrp:
+                try:
+                    gn, zs1 = [zs.strip() for zs in ln.split(":", 1)]
+                    uns = [zs.strip() for zs in zs1.split(",")]
+                    t = "group [%s] = " % (gn,)
+                    t += ", ".join("user [%s]" % (x,) for x in uns)
+                    self._l(ln, 5, t)
+                    grps[gn] = uns
+                except:
+                    t = 'lines inside the [groups] section must be "groupname: user1, user2, user..."'
+                    raise Exception(t + SBADCFG)
+                continue
+
            if vp is not None and ap is None:
+                if npass != 2:
+                    continue
+
                ap = ln
-                ap = os.path.expandvars(os.path.expanduser(ap))
-                ap = absreal(ap)
                self._l(ln, 2, "bound to filesystem-path [{}]".format(ap))
-                self._map_volume(ap, vp, mount, daxs, mflags)
+                vols = self._map_volume_idp(ap, vp, mount, daxs, mflags, all_un_gn)
+                if not vols:
+                    ap = vp = None
+                    self._l(ln, 2, "└─no users/groups known; was not mapped")
+                elif len(vols) > 1:
+                    for vol in vols:
+                        self._l(ln, 2, "└─mapping: [%s] => [%s]" % (vol[1], vol[0]))
                continue

            if cat == catx:
+                if npass != 2 or not ap:
+                    # not stage2, or unmapped ${u}/${g}
+                    continue
+
                err = ""
                try:
                    self._l(ln, 5, "volume access config:")
@@ -962,14 +1134,20 @@ class AuthSrv(object):
                    if " " in re.sub(", *", "", sv).strip():
                        err = "list of users is not comma-separated; "
                        raise Exception(err)
-                    assert vp is not None
-                    self._read_vol_str(sk, sv.replace(" ", ""), daxs[vp], mflags[vp])
+                    sv = sv.replace(" ", "")
+                    self._read_vol_str_idp(sk, sv, vols, all_un_gn, daxs, mflags)
                    continue
+                except CfgEx:
+                    raise
                except:
                    err += "accs entries must be 'rwmdgGhaA.: user1, user2, ...'"
-                    raise Exception(err + SBADCFG)
+                    raise CfgEx(err + SBADCFG)

            if cat == catf:
+                if npass != 2 or not ap:
+                    # not stage2, or unmapped ${u}/${g}
+                    continue
+
                err = ""
                try:
                    self._l(ln, 6, "volume-specific config:")
@@ -986,11 +1164,14 @@ class AuthSrv(object):
                        else:
                            fstr += ",{}={}".format(sk, sv)
                            assert vp is not None
-                            self._read_vol_str("c", fstr[1:], daxs[vp], mflags[vp])
+                            self._read_vol_str_idp(
+                                "c", fstr[1:], vols, all_un_gn, daxs, mflags
+                            )
                            fstr = ""
                    if fstr:
-                        assert vp is not None
-                        self._read_vol_str("c", fstr[1:], daxs[vp], mflags[vp])
+                        self._read_vol_str_idp(
+                            "c", fstr[1:], vols, all_un_gn, daxs, mflags
+                        )
                    continue
                except:
                    err += "flags entries (volflags) must be one of the following:\n  'flag1, flag2, ...'\n  'key: value'\n  'flag1, flag2, key: value'"
@@ -1001,14 +1182,21 @@ class AuthSrv(object):
        self._e()
        self.line_ctr = 0

-    def _read_vol_str(
-        self, lvl: str, uname: str, axs: AXS, flags: dict[str, Any]
+    def _read_vol_str_idp(
+        self,
+        lvl: str,
+        uname: str,
+        vols: list[tuple[str, str, str, str]],
+        un_gns: dict[str, list[str]],
+        axs: dict[str, AXS],
+        flags: dict[str, dict[str, Any]],
    ) -> None:
        if lvl.strip("crwmdgGhaA."):
            t = "%s,%s" % (lvl, uname) if uname else lvl
-            raise Exception("invalid config value (volume or volflag): %s" % (t,))
+            raise CfgEx("invalid config value (volume or volflag): %s" % (t,))

        if lvl == "c":
+            # here, 'uname' is not a username; it is a volflag name... sorry
            cval: Union[bool, str] = True
            try:
                # volflag with arguments, possibly with a preceding list of bools
@@ -1020,16 +1208,63 @@ class AuthSrv(object):
            while "," in uname:
                # one or more bools before the final flag; eat them
                n1, uname = uname.split(",", 1)
-                self._read_volflag(flags, n1, True, False)
+                for _, vp, _, _ in vols:
+                    self._read_volflag(flags[vp], n1, True, False)
+
+            for _, vp, _, _ in vols:
+                self._read_volflag(flags[vp], uname, cval, False)

-            self._read_volflag(flags, uname, cval, False)
            return

        if uname == "":
            uname = "*"

-        junkset = set()
+        unames = []
        for un in uname.replace(",", " ").strip().split():
+            if un.startswith("@"):
+                grp = un[1:]
+                uns = [x[0] for x in un_gns.items() if grp in x[1]]
+                if not uns and grp != "${g}" and not self.args.idp_h_grp:
+                    t = "group [%s] must be defined with --grp argument (or in a [groups] config section)"
+                    raise CfgEx(t % (grp,))
+
+                unames.extend(uns)
+            else:
+                unames.append(un)
+
+        # unames may still contain ${u} and ${g} so now expand those;
+        un_gn = [(un, gn) for un, gns in un_gns.items() for gn in gns]
+        if "*" not in un_gns:
+            # need ("*","") to match "*" in unames
+            un_gn.append(("*", ""))
+
+        for _, dst, vu, vg in vols:
+            unames2 = set()
+            for un, gn in un_gn:
+                # if vu/vg (volume user/group) is non-null,
+                # then each non-null value corresponds to
+                # ${u}/${g}; consider this a filter to
+                # apply to unames, as well as un_gn
+                if (vu and vu != un) or (vg and vg != gn):
+                    continue
+
+                for uname in unames + ([un] if vu or vg else []):
+                    if uname == "${u}":
+                        uname = vu or un
+                    elif uname in ("${g}", "@${g}"):
+                        uname = vg or gn
+
+                    if vu and vu != uname:
+                        continue
+
+                    if uname:
+                        unames2.add(uname)
+
+            self._read_vol_str(lvl, list(unames2), axs[dst])
+
+    def _read_vol_str(self, lvl: str, unames: list[str], axs: AXS) -> None:
+        junkset = set()
+        for un in unames:
            for alias, mapping in [
                ("h", "gh"),
                ("G", "gG"),
@@ -1106,12 +1341,18 @@ class AuthSrv(object):
        then supplementing with config files
        before finally building the VFS
        """
+        with self.mutex:
+            self._reload()

+    def _reload(self) -> None:
        acct: dict[str, str] = {}  # username:password
+        grps: dict[str, list[str]] = {}  # groupname:usernames
        daxs: dict[str, AXS] = {}
        mflags: dict[str, dict[str, Any]] = {}  # moutpoint:flags
        mount: dict[str, str] = {}  # dst:src (mountpoint:realpath)

+        self.idp_vols = {}  # yolo
+
        if self.args.a:
            # list of username:password
            for x in self.args.a:
@@ -1122,9 +1363,22 @@ class AuthSrv(object):
                    t = '\n  invalid value "{}" for argument -a, must be username:password'
                    raise Exception(t.format(x))

+        if self.args.grp:
+            # list of groupname:username,username,...
+            for x in self.args.grp:
+                try:
+                    # accept both = and : as separator between groupname and usernames,
+                    # accept both , and : as separators between usernames
+                    zs1, zs2 = x.replace("=", ":").split(":", 1)
+                    grps[zs1] = zs2.replace(":", ",").split(",")
+                except:
+                    t = '\n  invalid value "{}" for argument --grp, must be groupname:username1,username2,...'
+                    raise Exception(t.format(x))
+
        if self.args.v:
            # list of src:dst:permset:permset:...
            # permset is <rwmdgGhaA.>[,username][,username] or <c>,<flag>[=args]
+            all_un_gn = self._all_un_gn(acct, grps)
            for v_str in self.args.v:
                m = re_vol.match(v_str)
                if not m:
@@ -1134,20 +1388,19 @@ class AuthSrv(object):
                if WINDOWS:
                    src = uncyg(src)

-                # print("\n".join([src, dst, perms]))
-                src = absreal(src)
-                dst = dst.strip("/")
-                self._map_volume(src, dst, mount, daxs, mflags)
+                vols = self._map_volume_idp(src, dst, mount, daxs, mflags, all_un_gn)

                for x in perms.split(":"):
                    lvl, uname = x.split(",", 1) if "," in x else [x, ""]
-                    self._read_vol_str(lvl, uname, daxs[dst], mflags[dst])
+                    self._read_vol_str_idp(lvl, uname, vols, all_un_gn, daxs, mflags)

        if self.args.c:
            for cfg_fn in self.args.c:
                lns: list[str] = []
                try:
-                    self._parse_config_file(cfg_fn, lns, acct, daxs, mflags, mount)
+                    self._parse_config_file(
+                        cfg_fn, lns, acct, grps, daxs, mflags, mount
+                    )

                    zs = "#\033[36m cfg files in "
                    zst = [x[len(zs) :] for x in lns if x.startswith(zs)]
@@ -1178,7 +1431,7 @@ class AuthSrv(object):

            mount = cased

-        if not mount:
+        if not mount and not self.args.idp_h_usr:
            # -h says our defaults are CWD at root and read/write for everyone
            axs = AXS(["*"], ["*"], None, None)
            vfs = VFS(self.log_func, absreal("."), "", axs, {})
@@ -1214,9 +1467,13 @@ class AuthSrv(object):
            vol.all_vps.sort(key=lambda x: len(x[0]), reverse=True)
            vol.root = vfs

+        zss = set(acct)
+        zss.update(self.idp_accs)
+        zss.discard("*")
+        unames = ["*"] + list(sorted(zss))
+
        for perm in "read write move del get pget html admin dot".split():
            axs_key = "u" + perm
-            unames = ["*"] + list(acct.keys())
            for vp, vol in vfs.all_vols.items():
                zx = getattr(vol.axs, axs_key)
                if "*" in zx:
@@ -1250,18 +1507,20 @@ class AuthSrv(object):
            ]:
                for usr in d:
                    all_users[usr] = 1
-                    if usr != "*" and usr not in acct:
+                    if usr != "*" and usr not in acct and usr not in self.idp_accs:
                        missing_users[usr] = 1
                    if "*" not in d:
                        associated_users[usr] = 1

        if missing_users:
-            self.log(
-                "you must -a the following users: "
-                + ", ".join(k for k in sorted(missing_users)),
-                c=1,
-            )
-            raise Exception(BAD_CFG)
+            zs = ", ".join(k for k in sorted(missing_users))
+            if self.args.idp_h_usr:
+                t = "the following users are unknown, and assumed to come from IdP: "
+                self.log(t + zs, c=6)
+            else:
+                t = "you must -a the following users: "
+                self.log(t + zs, c=1)
+                raise Exception(BAD_CFG)

        if LEELOO_DALLAS in all_users:
            raise Exception("sorry, reserved username: " + LEELOO_DALLAS)
@@ -1402,13 +1661,6 @@ class AuthSrv(object):
                if not vol.flags.get("robots"):
                    vol.flags["norobots"] = True

-        for vol in vfs.all_vols.values():
-            h = [vol.flags.get("html_head", self.args.html_head)]
-            if vol.flags.get("norobots"):
-                h.insert(0, META_NOBOTS)
-
-            vol.flags["html_head"] = "\n".join([x for x in h if x])
-
        for vol in vfs.all_vols.values():
            if self.args.no_vthumb:
                vol.flags["dvthumb"] = True
@@ -1486,7 +1738,7 @@ class AuthSrv(object):
                if k not in vol.flags:
                    vol.flags[k] = getattr(self.args, k)

-            for k in ("nrand",):
+            for k in ("nrand", "u2abort"):
                if k in vol.flags:
                    vol.flags[k] = int(vol.flags[k])

@@ -1494,6 +1746,14 @@ class AuthSrv(object):
                if k in vol.flags:
                    vol.flags[k] = float(vol.flags[k])

+            try:
+                zs1, zs2 = vol.flags["rm_retry"].split("/")
+                vol.flags["rm_re_t"] = float(zs1)
+                vol.flags["rm_re_r"] = float(zs2)
+            except:
+                t = 'volume "/%s" has invalid rm_retry [%s]'
+                raise Exception(t % (vol.vpath, vol.flags.get("rm_retry")))
+
            for k1, k2 in IMPLICATIONS:
                if k1 in vol.flags:
                    vol.flags[k2] = True
@@ -1505,8 +1765,8 @@ class AuthSrv(object):
            dbds = "acid|swal|wal|yolo"
            vol.flags["dbd"] = dbd = vol.flags.get("dbd") or self.args.dbd
            if dbd not in dbds.split("|"):
-                t = "invalid dbd [{}]; must be one of [{}]"
-                raise Exception(t.format(dbd, dbds))
+                t = 'volume "/%s" has invalid dbd [%s]; must be one of [%s]'
+                raise Exception(t % (vol.vpath, dbd, dbds))

            # default tag cfgs if unset
            for k in ("mte", "mth", "exp_md", "exp_lg"):
@@ -1742,20 +2002,37 @@ class AuthSrv(object):
        except Pebkac:
            self.warn_anonwrite = True

-        with self.mutex:
-            self.vfs = vfs
-            self.acct = acct
-            self.iacct = {v: k for k, v in acct.items()}
+        idp_err = "WARNING! The following IdP volumes are mounted directly below another volume where anonymous users can read and/or write files. This is a SECURITY HAZARD!! When copyparty is restarted, it will not know about these IdP volumes yet. These volumes will then be accessible by anonymous users UNTIL one of the users associated with their volume sends a request to the server. RECOMMENDATION: You should create a restricted volume where nobody can read/write files, and make sure that all IdP volumes are configured to appear somewhere below that volume."
+        for idp_vp in self.idp_vols:
+            parent_vp = vsplit(idp_vp)[0]
+            vn, _ = vfs.get(parent_vp, "*", False, False)
+            zs = (
+                "READABLE"
+                if "*" in vn.axs.uread
+                else "WRITABLE"
+                if "*" in vn.axs.uwrite
+                else ""
+            )
+            if zs:
+                t = '\nWARNING: Volume "/%s" appears below "/%s" and would be WORLD-%s'
+                idp_err += t % (idp_vp, vn.vpath, zs)
+        if "\n" in idp_err:
+            self.log(idp_err, 1)

-            self.re_pwd = None
-            pwds = [re.escape(x) for x in self.iacct.keys()]
-            if pwds:
-                if self.ah.on:
-                    zs = r"(\[H\] pw:.*|[?&]pw=)([^&]+)"
-                else:
-                    zs = r"(\[H\] pw:.*|=)(" + "|".join(pwds) + r")([]&; ]|$)"
+        self.vfs = vfs
+        self.acct = acct
+        self.grps = grps
+        self.iacct = {v: k for k, v in acct.items()}

-                self.re_pwd = re.compile(zs)
+        self.re_pwd = None
+        pwds = [re.escape(x) for x in self.iacct.keys()]
+        if pwds:
+            if self.ah.on:
+                zs = r"(\[H\] pw:.*|[?&]pw=)([^&]+)"
+            else:
+                zs = r"(\[H\] pw:.*|=)(" + "|".join(pwds) + r")([]&; ]|$)"
+
+            self.re_pwd = re.compile(zs)

    def setup_pwhash(self, acct: dict[str, str]) -> None:
        self.ah = PWHash(self.args)
@@ -1997,6 +2274,12 @@ class AuthSrv(object):
                ret.append("  {}: {}".format(u, p))
            ret.append("")

+        if self.grps:
+            ret.append("[groups]")
+            for gn, uns in self.grps.items():
+                ret.append("  %s: %s" % (gn, ", ".join(uns)))
+            ret.append("")
+
        for vol in self.vfs.all_vols.values():
            ret.append("[/{}]".format(vol.vpath))
            ret.append("  " + vol.realpath)
@@ -2094,27 +2377,50 @@ def split_cfg_ln(ln: str) -> dict[str, Any]:
    return ret


-def expand_config_file(ret: list[str], fp: str, ipath: str) -> None:
+def expand_config_file(
+    log: Optional["NamedLogger"], ret: list[str], fp: str, ipath: str
+) -> None:
    """expand all % file includes"""
    fp = absreal(fp)
    if len(ipath.split(" -> ")) > 64:
        raise Exception("hit max depth of 64 includes")

    if os.path.isdir(fp):
-        names = os.listdir(fp)
-        crumb = "#\033[36m cfg files in {} => {}\033[0m".format(fp, names)
-        ret.append(crumb)
-        for fn in sorted(names):
+        names = list(sorted(os.listdir(fp)))
+        cnames = [x for x in names if x.lower().endswith(".conf")]
+        if not cnames:
+            t = "warning: tried to read config-files from folder '%s' but it does not contain any "
+            if names:
+                t += ".conf files; the following files were ignored: %s"
+                t = t % (fp, ", ".join(names[:8]))
+            else:
+                t += "files at all"
+                t = t % (fp,)
+
+            if log:
+                log(t, 3)
+
+            ret.append("#\033[33m %s\033[0m" % (t,))
+        else:
+            zs = "#\033[36m cfg files in %s => %s\033[0m" % (fp, cnames)
+            ret.append(zs)
+
+        for fn in cnames:
            fp2 = os.path.join(fp, fn)
-            if not fp2.endswith(".conf") or fp2 in ipath:
+            if fp2 in ipath:
                continue

-            expand_config_file(ret, fp2, ipath)
+            expand_config_file(log, ret, fp2, ipath)

-        if ret[-1] == crumb:
-            # no config files below; remove breadcrumb
-            ret.pop()
+        return

+    if not os.path.exists(fp):
+        t = "warning: tried to read config from '%s' but the file/folder does not exist"
+        t = t % (fp,)
+        if log:
+            log(t, 3)
+
+        ret.append("#\033[31m %s\033[0m" % (t,))
        return

    ipath += " -> " + fp
@@ -2128,7 +2434,7 @@ def expand_config_file(ret: list[str], fp: str, ipath: str) -> None:
                fp2 = ln[1:].strip()
                fp2 = os.path.join(os.path.dirname(fp), fp2)
                ofs = len(ret)
-                expand_config_file(ret, fp2, ipath)
+                expand_config_file(log, ret, fp2, ipath)
                for n in range(ofs, len(ret)):
                    ret[n] = pad + ret[n]
                continue
--- a/copyparty/cfg.py
+++ b/copyparty/cfg.py
@@ -20,7 +20,6 @@ def vf_bmap() -> dict[str, str]:
        "no_thumb": "dthumb",
        "no_vthumb": "dvthumb",
        "no_athumb": "dathumb",
-        "th_no_crop": "nocrop",
    }
    for k in (
        "dotsrch",
@@ -56,14 +55,18 @@ def vf_vmap() -> dict[str, str]:
        "re_maxage": "scan",
        "th_convt": "convt",
        "th_size": "thsize",
+        "th_crop": "crop",
+        "th_x3": "th3x",
    }
    for k in (
        "dbd",
        "lg_sbf",
        "md_sbf",
        "nrand",
+        "rm_retry",
        "sort",
        "unlist",
+        "u2abort",
        "u2ts",
    ):
        ret[k] = k
@@ -114,6 +117,7 @@ flagcats = {
        "hardlink": "does dedup with hardlinks instead of symlinks",
        "neversymlink": "disables symlink fallback; full copy instead",
        "copydupes": "disables dedup, always saves full copies of dupes",
+        "sparse": "force use of sparse files, mainly for s3-backed storage",
        "daw": "enable full WebDAV write support (dangerous);\nPUT-operations will now \033[1;31mOVERWRITE\033[0;35m existing files",
        "nosub": "forces all uploads into the top folder of the vfs",
        "magic": "enables filetype detection for nameless uploads",
@@ -128,6 +132,7 @@ flagcats = {
        "rand": "force randomized filenames, 9 chars long by default",
        "nrand=N": "randomized filenames are N chars long",
        "u2ts=fc": "[f]orce [c]lient-last-modified or [u]pload-time",
+        "u2abort=1": "allow aborting unfinished uploads? 0=no 1=strict 2=ip-chk 3=acct-chk",
        "sz=1k-3m": "allow filesizes between 1 KiB and 3MiB",
        "df=1g": "ensure 1 GiB free disk space",
    },
@@ -171,7 +176,8 @@ flagcats = {
        "dathumb": "disables audio thumbnails (spectrograms)",
        "dithumb": "disables image thumbnails",
        "thsize": "thumbnail res; WxH",
-        "nocrop": "disable center-cropping by default",
+        "crop": "center-cropping (y/n/fy/fn)",
+        "th3x": "3x resolution (y/n/fy/fn)",
        "convt": "conversion timeout in seconds",
    },
    "handlers\n(better explained in --help-handlers)": {
@@ -208,6 +214,7 @@ flagcats = {
        "dots": "allow all users with read-access to\nenable the option to show dotfiles in listings",
        "fk=8": 'generates per-file accesskeys,\nwhich are then required at the "g" permission;\nkeys are invalidated if filesize or inode changes',
        "fka=8": 'generates slightly weaker per-file accesskeys,\nwhich are then required at the "g" permission;\nnot affected by filesize or inode numbers',
+        "rm_retry": "ms-windows: timeout for deleting busy files",
        "davauth": "ask webdav clients to login for all folders",
        "davrt": "show lastmod time of symlink destination, not the link itself\n(note: this option is always enabled for recursive listings)",
    },
--- a/copyparty/ftpd.py
+++ b/copyparty/ftpd.py
@@ -20,6 +20,7 @@ from .authsrv import VFS
 from .bos import bos
 from .util import (
    Daemon,
+    ODict,
    Pebkac,
    exclude_dotfiles,
    fsenc,
@@ -299,7 +300,7 @@ class FtpFs(AbstractedFS):

        vp = join(self.cwd, path).lstrip("/")
        try:
-            self.hub.up2k.handle_rm(self.uname, self.h.cli_ip, [vp], [], False)
+            self.hub.up2k.handle_rm(self.uname, self.h.cli_ip, [vp], [], False, False)
        except Exception as ex:
            raise FSE(str(ex))

@@ -409,7 +410,7 @@ class FtpHandler(FTPHandler):
        if cip.startswith("::ffff:"):
            cip = cip[7:]

-        if self.args.ftp_ipa_re and not self.args.ftp_ipa_re.match(cip):
+        if self.args.ftp_ipa_nm and not self.args.ftp_ipa_nm.map(cip):
            logging.warning("client rejected (--ftp-ipa): %s", cip)
            self.connected = False
            conn.close()
@@ -545,6 +546,8 @@ class Ftpd(object):
        if self.args.ftp4:
            ips = [x for x in ips if ":" not in x]

+        ips = list(ODict.fromkeys(ips))  # dedup
+
        ioloop = IOLoop()
        for ip in ips:
            for h, lp in hs:
--- a/copyparty/httpcli.py
+++ b/copyparty/httpcli.py
@@ -37,6 +37,8 @@ from .star import StreamTar
 from .sutil import StreamArc, gfilter
 from .szip import StreamZip
 from .util import (
+    APPLESAN_RE,
+    BITNESS,
    HTTPCODE,
    META_NOBOTS,
    UTC,
@@ -87,6 +89,7 @@ from .util import (
    vjoin,
    vol_san,
    vsplit,
+    wunlink,
    yieldfile,
 )

@@ -112,7 +115,7 @@ class HttpCli(object):

        self.t0 = time.time()
        self.conn = conn
-        self.mutex = conn.mutex  # mypy404
+        self.u2mutex = conn.u2mutex  # mypy404
        self.s = conn.s
        self.sr = conn.sr
        self.ip = conn.addr[0]
@@ -167,16 +170,12 @@ class HttpCli(object):
        self.can_dot = False
        self.out_headerlist: list[tuple[str, str]] = []
        self.out_headers: dict[str, str] = {}
-        self.html_head = " "
        # post
        self.parser: Optional[MultipartParser] = None
        # end placeholders

        self.bufsz = 1024 * 32
-        h = self.args.html_head
-        if self.args.no_robots:
-            h = META_NOBOTS + (("\n" + h) if h else "")
-        self.html_head = h
+        self.html_head = ""

    def log(self, msg: str, c: Union[int, str] = 0) -> None:
        ptn = self.asrv.re_pwd
@@ -228,13 +227,11 @@ class HttpCli(object):
            "Vary": "Origin, PW, Cookie",
            "Cache-Control": "no-store, max-age=0",
        }
-        if self.args.no_robots:
-            self.out_headers["X-Robots-Tag"] = "noindex, nofollow"

        if self.is_banned():
            return False

-        if self.args.ipa_re and not self.args.ipa_re.match(self.conn.addr[0]):
+        if self.conn.ipa_nm and not self.conn.ipa_nm.map(self.conn.addr[0]):
            self.log("client rejected (--ipa)", 3)
            self.terse_reply(b"", 500)
            return False
@@ -297,6 +294,7 @@ class HttpCli(object):
            zs = "%s:%s" % self.s.getsockname()[:2]
            self.host = zs[7:] if zs.startswith("::ffff:") else zs

+        trusted_xff = False
        n = self.args.rproxy
        if n:
            zso = self.headers.get(self.args.xff_hdr)
@@ -313,21 +311,28 @@ class HttpCli(object):
                    self.log(t.format(self.args.rproxy, zso), c=3)

                pip = self.conn.addr[0]
-                if self.args.xff_re and not self.args.xff_re.match(pip):
-                    t = 'got header "%s" from untrusted source "%s" claiming the true client ip is "%s" (raw value: "%s");  if you trust this, you must allowlist this proxy with "--xff-src=%s"'
+                xffs = self.conn.xff_nm
+                if xffs and not xffs.map(pip):
+                    t = 'got header "%s" from untrusted source "%s" claiming the true client ip is "%s" (raw value: "%s");  if you trust this, you must allowlist this proxy with "--xff-src=%s"%s'
                    if self.headers.get("cf-connecting-ip"):
-                        t += "  Alternatively, if you are behind cloudflare, it is better to specify these two instead:  --xff-hdr=cf-connecting-ip  --xff-src=any"
+                        t += '  Note: if you are behind cloudflare, then this default header is not a good choice; please first make sure your local reverse-proxy (if any) does not allow non-cloudflare IPs from providing cf-* headers, and then add this additional global setting: "--xff-hdr=cf-connecting-ip"'
+                    else:
+                        t += '  Note: depending on your reverse-proxy, and/or WAF, and/or other intermediates, you may want to read the true client IP from another header by also specifying "--xff-hdr=SomeOtherHeader"'
                    zs = (
                        ".".join(pip.split(".")[:2]) + "."
                        if "." in pip
                        else ":".join(pip.split(":")[:4]) + ":"
+                    ) + "0.0/16"
+                    zs2 = (
+                        ' or "--xff-src=lan"' if self.conn.hsrv.xff_lan.map(pip) else ""
                    )
-                    self.log(t % (self.args.xff_hdr, pip, cli_ip, zso, zs), 3)
+                    self.log(t % (self.args.xff_hdr, pip, cli_ip, zso, zs, zs2), 3)
                else:
                    self.ip = cli_ip
                    self.is_vproxied = bool(self.args.R)
                    self.log_src = self.conn.set_rproxy(self.ip)
                    self.host = self.headers.get("x-forwarded-host") or self.host
+                    trusted_xff = True

        if self.is_banned():
            return False
@@ -455,9 +460,58 @@ class HttpCli(object):

        if self.args.idp_h_usr:
            self.pw = ""
-            self.uname = self.headers.get(self.args.idp_h_usr) or "*"
-            if self.uname not in self.asrv.vfs.aread:
-                self.log("unknown username: [%s]" % (self.uname), 1)
+            idp_usr = self.headers.get(self.args.idp_h_usr) or ""
+            if idp_usr:
+                idp_grp = (
+                    self.headers.get(self.args.idp_h_grp) or ""
+                    if self.args.idp_h_grp
+                    else ""
+                )
+
+                if not trusted_xff:
+                    pip = self.conn.addr[0]
+                    xffs = self.conn.xff_nm
+                    trusted_xff = xffs and xffs.map(pip)
+
+                trusted_key = (
+                    not self.args.idp_h_key
+                ) or self.args.idp_h_key in self.headers
+
+                if trusted_key and trusted_xff:
+                    self.asrv.idp_checkin(self.conn.hsrv.broker, idp_usr, idp_grp)
+                else:
+                    if not trusted_key:
+                        t = 'the idp-h-key header ("%s") is not present in the request; will NOT trust the other headers saying that the client\'s username is "%s" and group is "%s"'
+                        self.log(t % (self.args.idp_h_key, idp_usr, idp_grp), 3)
+
+                    if not trusted_xff:
+                        t = 'got IdP headers from untrusted source "%s" claiming the client\'s username is "%s" and group is "%s";  if you trust this, you must allowlist this proxy with "--xff-src=%s"%s'
+                        if not self.args.idp_h_key:
+                            t += "  Note: you probably also want to specify --idp-h-key <SECRET-HEADER-NAME> for additional security"
+
+                        pip = self.conn.addr[0]
+                        zs = (
+                            ".".join(pip.split(".")[:2]) + "."
+                            if "." in pip
+                            else ":".join(pip.split(":")[:4]) + ":"
+                        ) + "0.0/16"
+                        zs2 = (
+                            ' or "--xff-src=lan"'
+                            if self.conn.hsrv.xff_lan.map(pip)
+                            else ""
+                        )
+                        self.log(t % (pip, idp_usr, idp_grp, zs, zs2), 3)
+
+                    idp_usr = "*"
+                    idp_grp = ""
+
+                if idp_usr in self.asrv.vfs.aread:
+                    self.uname = idp_usr
+                    self.html_head += "<script>var is_idp=1</script>\n"
+                else:
+                    self.log("unknown username: [%s]" % (idp_usr), 1)
+                    self.uname = "*"
+            else:
                self.uname = "*"
        else:
            self.pw = uparam.get("pw") or self.headers.get("pw") or bauth or cookie_pw
@@ -507,6 +561,10 @@ class HttpCli(object):

        self.s.settimeout(self.args.s_tbody or None)

+        if "norobots" in vn.flags:
+            self.html_head += META_NOBOTS
+            self.out_headers["X-Robots-Tag"] = "noindex, nofollow"
+
        try:
            cors_k = self._cors()
            if self.mode in ("GET", "HEAD"):
@@ -515,9 +573,13 @@ class HttpCli(object):
                return self.handle_options() and self.keepalive

            if not cors_k:
+                host = self.headers.get("host", "<?>")
                origin = self.headers.get("origin", "<?>")
-                self.log("cors-reject {} from {}".format(self.mode, origin), 3)
-                raise Pebkac(403, "no surfing")
+                proto = "https://" if self.is_https else "http://"
+                guess = "modifying" if (origin and host) else "stripping"
+                t = "cors-reject %s because request-header Origin='%s' does not match request-protocol '%s' and host '%s' based on request-header Host='%s' (note: if this request is not malicious, check if your reverse-proxy is accidentally %s request headers, in particular 'Origin', for example by running copyparty with --ihead='*' to show all request headers)"
+                self.log(t % (self.mode, origin, proto, self.host, host, guess), 3)
+                raise Pebkac(403, "rejected by cors-check")

            # getattr(self.mode) is not yet faster than this
            if self.mode == "POST":
@@ -648,7 +710,11 @@ class HttpCli(object):

    def k304(self) -> bool:
        k304 = self.cookies.get("k304")
-        return k304 == "y" or ("; Trident/" in self.ua and not k304)
+        return (
+            k304 == "y"
+            or (self.args.k304 == 2 and k304 != "n")
+            or ("; Trident/" in self.ua and not k304)
+        )

    def send_headers(
        self,
@@ -1384,8 +1450,7 @@ class HttpCli(object):
            return False

        vp = "/" + self.vpath
-        ptn = r"/\.(_|DS_Store|Spotlight-|fseventsd|Trashes|AppleDouble)|/__MACOS"
-        if re.search(ptn, vp):
+        if re.search(APPLESAN_RE, vp):
            zt = '<?xml version="1.0" encoding="utf-8"?>\n<D:error xmlns:D="DAV:"><D:lock-token-submitted><D:href>{}</D:href></D:lock-token-submitted></D:error>'
            zb = zt.format(vp).encode("utf-8", "replace")
            self.reply(zb, 423, "text/xml; charset=utf-8")
@@ -1691,7 +1756,7 @@ class HttpCli(object):
                and bos.path.getmtime(path) >= time.time() - self.args.blank_wt
            ):
                # small toctou, but better than clobbering a hardlink
-                bos.unlink(path)
+                wunlink(self.log, path, vfs.flags)

        with ren_open(fn, *open_a, **params) as zfw:
            f, fn = zfw["orz"]
@@ -1705,7 +1770,7 @@ class HttpCli(object):
                lim.chk_sz(post_sz)
                lim.chk_vsz(self.conn.hsrv.broker, vfs.realpath, post_sz)
            except:
-                bos.unlink(path)
+                wunlink(self.log, path, vfs.flags)
                raise

        if self.args.nw:
@@ -1758,7 +1823,7 @@ class HttpCli(object):
        ):
            t = "upload blocked by xau server config"
            self.log(t, 1)
-            os.unlink(path)
+            wunlink(self.log, path, vfs.flags)
            raise Pebkac(403, t)

        vfs, rem = vfs.get_dbv(rem)
@@ -1986,8 +2051,11 @@ class HttpCli(object):
            except:
                raise Pebkac(500, min_ex())

-        x = self.conn.hsrv.broker.ask("up2k.handle_json", body, self.u2fh.aps)
-        ret = x.get()
+        # not to protect u2fh, but to prevent handshakes while files are closing
+        with self.u2mutex:
+            x = self.conn.hsrv.broker.ask("up2k.handle_json", body, self.u2fh.aps)
+            ret = x.get()
+
        if self.is_vproxied:
            if "purl" in ret:
                ret["purl"] = self.args.SR + ret["purl"]
@@ -2092,7 +2160,7 @@ class HttpCli(object):
            f = None
            fpool = not self.args.no_fpool and sprs
            if fpool:
-                with self.mutex:
+                with self.u2mutex:
                    try:
                        f = self.u2fh.pop(path)
                    except:
@@ -2135,7 +2203,7 @@ class HttpCli(object):
                if not fpool:
                    f.close()
                else:
-                    with self.mutex:
+                    with self.u2mutex:
                        self.u2fh.put(path, f)
            except:
                # maybe busted handle (eg. disk went full)
@@ -2154,7 +2222,7 @@ class HttpCli(object):
            return False

        if not num_left and fpool:
-            with self.mutex:
+            with self.u2mutex:
                self.u2fh.close(path)

        if not num_left and not self.args.nw:
@@ -2439,8 +2507,8 @@ class HttpCli(object):
                            lim.chk_nup(self.ip)
                        except:
                            if not nullwrite:
-                                bos.unlink(tabspath)
-                                bos.unlink(abspath)
+                                wunlink(self.log, tabspath, vfs.flags)
+                                wunlink(self.log, abspath, vfs.flags)
                            fname = os.devnull
                            raise

@@ -2468,7 +2536,7 @@ class HttpCli(object):
                    ):
                        t = "upload blocked by xau server config"
                        self.log(t, 1)
-                        os.unlink(abspath)
+                        wunlink(self.log, abspath, vfs.flags)
                        raise Pebkac(403, t)

                    dbv, vrem = vfs.get_dbv(rem)
@@ -2712,7 +2780,7 @@ class HttpCli(object):
                raise Pebkac(403, t)

        if bos.path.exists(fp):
-            bos.unlink(fp)
+            wunlink(self.log, fp, vfs.flags)

        with open(fsenc(fp), "wb", 512 * 1024) as f:
            sz, sha512, _ = hashcopy(p_data, f, self.args.s_wr_slp)
@@ -2724,7 +2792,7 @@ class HttpCli(object):
                lim.chk_sz(sz)
                lim.chk_vsz(self.conn.hsrv.broker, vfs.realpath, sz)
            except:
-                bos.unlink(fp)
+                wunlink(self.log, fp, vfs.flags)
                raise

        new_lastmod = bos.stat(fp).st_mtime
@@ -2747,7 +2815,7 @@ class HttpCli(object):
        ):
            t = "save blocked by xau server config"
            self.log(t, 1)
-            os.unlink(fp)
+            wunlink(self.log, fp, vfs.flags)
            raise Pebkac(403, t)

        vfs, rem = vfs.get_dbv(rem)
@@ -2822,11 +2890,11 @@ class HttpCli(object):
        logtail = ""

        #
-        # if request is for foo.js, check if we have foo.js.{gz,br}
+        # if request is for foo.js, check if we have foo.js.gz

        file_ts = 0.0
        editions: dict[str, tuple[str, int]] = {}
-        for ext in ["", ".gz", ".br"]:
+        for ext in ("", ".gz"):
            try:
                fs_path = req_path + ext
                st = bos.stat(fs_path)
@@ -2871,12 +2939,7 @@ class HttpCli(object):
            x.strip()
            for x in self.headers.get("accept-encoding", "").lower().split(",")
        ]
-        if ".br" in editions and "br" in supported_editions:
-            is_compressed = True
-            selected_edition = ".br"
-            fs_path, file_sz = editions[".br"]
-            self.out_headers["Content-Encoding"] = "br"
-        elif ".gz" in editions:
+        if ".gz" in editions:
            is_compressed = True
            selected_edition = ".gz"
            fs_path, file_sz = editions[".gz"]
@@ -2892,13 +2955,8 @@ class HttpCli(object):
            is_compressed = False
            selected_edition = "plain"

-        try:
-            fs_path, file_sz = editions[selected_edition]
-            logmsg += "{} ".format(selected_edition.lstrip("."))
-        except:
-            # client is old and we only have .br
-            # (could make brotli a dep to fix this but it's not worth)
-            raise Pebkac(404)
+        fs_path, file_sz = editions[selected_edition]
+        logmsg += "{} ".format(selected_edition.lstrip("."))

        #
        # partial
@@ -2959,9 +3017,11 @@ class HttpCli(object):
            # 512 kB is optimal for huge files, use 64k
            open_args = [fsenc(fs_path), "rb", 64 * 1024]
            use_sendfile = (
-                not self.tls  #
+                # fmt: off
+                not self.tls
                and not self.args.no_sendfile
-                and hasattr(os, "sendfile")
+                and (BITNESS > 32 or file_sz < 0x7fffFFFF)
+                # fmt: on
            )

        #
@@ -3132,11 +3192,15 @@ class HttpCli(object):

        ext = ext.rstrip(".") or "unk"
        if len(ext) > 11:
-            ext = "⋯" + ext[-9:]
+            ext = "~" + ext[-9:]

+        return self.tx_svg(ext, exact)
+
+    def tx_svg(self, txt: str, small: bool = False) -> bool:
        # chrome cannot handle more than ~2000 unique SVGs
-        chrome = " rv:" not in self.ua
-        mime, ico = self.ico.get(ext, not exact, chrome)
+        # so url-param "raster" returns a png/webp instead
+        # (useragent-sniffing kinshi due to caching proxies)
+        mime, ico = self.ico.get(txt, not small, "raster" in self.uparam)

        lm = formatdate(self.E.t0, usegmt=True)
        self.reply(ico, mime=mime, headers={"Last-Modified": lm})
@@ -3332,6 +3396,8 @@ class HttpCli(object):
            self.reply(zb, mime="text/plain; charset=utf-8")
            return True

+        self.html_head += self.vn.flags.get("html_head", "")
+
        html = self.j2s(
            "splash",
            this=self,
@@ -3347,6 +3413,7 @@ class HttpCli(object):
            dbwt=vs["dbwt"],
            url_suf=suf,
            k304=self.k304(),
+            k304vis=self.args.k304 > 0,
            ver=S_VERSION if self.args.ver else "",
            ahttps="" if self.is_https else "https://" + self.host + self.req,
        )
@@ -3355,7 +3422,7 @@ class HttpCli(object):

    def set_k304(self) -> bool:
        v = self.uparam["k304"].lower()
-        if v == "y":
+        if v in "yn":
            dur = 86400 * 299
        else:
            dur = 0
@@ -3396,10 +3463,13 @@ class HttpCli(object):
            pt = "404 not found  ┐( ´ -`)┌"

        if self.ua.startswith("curl/") or self.ua.startswith("fetch"):
-            pt = "# acct: %s\n%s" % (self.uname, pt)
+            pt = "# acct: %s\n%s\n" % (self.uname, pt)
            self.reply(pt.encode("utf-8"), status=rc)
            return True

+        if "th" in self.ouparam:
+            return self.tx_svg("e" + pt[:3])
+
        t = t.format(self.args.SR)
        qv = quotep(self.vpaths) + self.ourlq()
        html = self.j2s("splash", this=self, qvpath=qv, msg=t)
@@ -3535,8 +3605,7 @@ class HttpCli(object):
        return ret

    def tx_ups(self) -> bool:
-        if not self.args.unpost:
-            raise Pebkac(403, "the unpost feature is disabled in server config")
+        have_unpost = self.args.unpost and "e2d" in self.vn.flags

        idx = self.conn.get_u2idx()
        if not idx or not hasattr(idx, "p_end"):
@@ -3555,7 +3624,14 @@ class HttpCli(object):
            if "fk" in vol.flags
            and (self.uname in vol.axs.uread or self.uname in vol.axs.upget)
        }
-        for vol in self.asrv.vfs.all_vols.values():
+
+        x = self.conn.hsrv.broker.ask(
+            "up2k.get_unfinished_by_user", self.uname, self.ip
+        )
+        uret = x.get()
+
+        allvols = self.asrv.vfs.all_vols if have_unpost else {}
+        for vol in allvols.values():
            cur = idx.get_cur(vol.realpath)
            if not cur:
                continue
@@ -3607,9 +3683,13 @@ class HttpCli(object):
            for v in ret:
                v["vp"] = self.args.SR + v["vp"]

-        jtxt = json.dumps(ret, indent=2, sort_keys=True).encode("utf-8", "replace")
-        self.log("{} #{} {:.2f}sec".format(lm, len(ret), time.time() - t0))
-        self.reply(jtxt, mime="application/json")
+        if not have_unpost:
+            ret = [{"kinshi": 1}]
+
+        jtxt = '{"u":%s,"c":%s}' % (uret, json.dumps(ret, indent=0))
+        zi = len(uret.split('\n"pd":')) - 1
+        self.log("%s #%d+%d %.2fsec" % (lm, zi, len(ret), time.time() - t0))
+        self.reply(jtxt.encode("utf-8", "replace"), mime="application/json")
        return True

    def handle_rm(self, req: list[str]) -> bool:
@@ -3624,11 +3704,12 @@ class HttpCli(object):
        elif self.is_vproxied:
            req = [x[len(self.args.SR) :] for x in req]

+        unpost = "unpost" in self.uparam
        nlim = int(self.uparam.get("lim") or 0)
        lim = [nlim, nlim] if nlim else []

        x = self.conn.hsrv.broker.ask(
-            "up2k.handle_rm", self.uname, self.ip, req, lim, False
+            "up2k.handle_rm", self.uname, self.ip, req, lim, False, unpost
        )
        self.loud_reply(x.get())
        return True
@@ -3766,11 +3847,9 @@ class HttpCli(object):
        e2d = "e2d" in vn.flags
        e2t = "e2t" in vn.flags

-        self.html_head = vn.flags.get("html_head", "")
-        if vn.flags.get("norobots") or "b" in self.uparam:
+        self.html_head += vn.flags.get("html_head", "")
+        if "b" in self.uparam:
            self.out_headers["X-Robots-Tag"] = "noindex, nofollow"
-        else:
-            self.out_headers.pop("X-Robots-Tag", None)

        is_dir = stat.S_ISDIR(st.st_mode)
        fk_pass = False
@@ -3780,12 +3859,15 @@ class HttpCli(object):
            if idx and hasattr(idx, "p_end"):
                icur = idx.get_cur(dbv.realpath)

+        th_fmt = self.uparam.get("th")
        if self.can_read:
-            th_fmt = self.uparam.get("th")
            if th_fmt is not None:
+                nothumb = "dthumb" in dbv.flags
                if is_dir:
                    vrem = vrem.rstrip("/")
-                    if icur and vrem:
+                    if nothumb:
+                        pass
+                    elif icur and vrem:
                        q = "select fn from cv where rd=? and dn=?"
                        crd, cdn = vrem.rsplit("/", 1) if "/" in vrem else ("", vrem)
                        # no mojibake support:
@@ -3808,10 +3890,10 @@ class HttpCli(object):
                                break

                    if is_dir:
-                        return self.tx_ico("a.folder")
+                        return self.tx_svg("folder")

                thp = None
-                if self.thumbcli:
+                if self.thumbcli and not nothumb:
                    thp = self.thumbcli.get(dbv, vrem, int(st.st_mtime), th_fmt)

                if thp:
@@ -3822,6 +3904,9 @@ class HttpCli(object):

                return self.tx_ico(rem)

+        elif self.can_write and th_fmt is not None:
+            return self.tx_svg("upload\nonly")
+
        elif self.can_get and self.avn:
            axs = self.avn.axs
            if self.uname not in axs.uhtml:
@@ -3966,7 +4051,8 @@ class HttpCli(object):
            "idx": e2d,
            "itag": e2t,
            "dsort": vf["sort"],
-            "dfull": "nocrop" in vf,
+            "dcrop": vf["crop"],
+            "dth3x": vf["th3x"],
            "u2ts": vf["u2ts"],
            "lifetime": vn.flags.get("lifetime") or 0,
            "frand": bool(vn.flags.get("rand")),
@@ -3993,8 +4079,9 @@ class HttpCli(object):
            "sb_md": "" if "no_sb_md" in vf else (vf.get("md_sbf") or "y"),
            "readme": readme,
            "dgrid": "grid" in vf,
-            "dfull": "nocrop" in vf,
            "dsort": vf["sort"],
+            "dcrop": vf["crop"],
+            "dth3x": vf["th3x"],
            "themes": self.args.themes,
            "turbolvl": self.args.turbo,
            "u2j": self.args.u2j,
--- a/copyparty/httpconn.py
+++ b/copyparty/httpconn.py
@@ -23,7 +23,7 @@ from .mtag import HAVE_FFMPEG
 from .th_cli import ThumbCli
 from .th_srv import HAVE_PIL, HAVE_VIPS
 from .u2idx import U2idx
-from .util import HMaccas, shut_socket
+from .util import HMaccas, NetMap, shut_socket

 if True:  # pylint: disable=using-constant-test
    from typing import Optional, Pattern, Union
@@ -50,11 +50,13 @@ class HttpConn(object):
        self.addr = addr
        self.hsrv = hsrv

-        self.mutex: threading.Lock = hsrv.mutex  # mypy404
+        self.u2mutex: threading.Lock = hsrv.u2mutex  # mypy404
        self.args: argparse.Namespace = hsrv.args  # mypy404
        self.E: EnvParams = self.args.E
        self.asrv: AuthSrv = hsrv.asrv  # mypy404
        self.u2fh: Util.FHC = hsrv.u2fh  # mypy404
+        self.ipa_nm: NetMap = hsrv.ipa_nm
+        self.xff_nm: NetMap = hsrv.xff_nm
        self.iphash: HMaccas = hsrv.broker.iphash
        self.bans: dict[str, int] = hsrv.bans
        self.aclose: dict[str, int] = hsrv.aclose
--- a/copyparty/httpsrv.py
+++ b/copyparty/httpsrv.py
@@ -67,6 +67,7 @@ from .util import (
    Netdev,
    NetMap,
    absreal,
+    build_netmap,
    ipnorm,
    min_ex,
    shut_socket,
@@ -117,6 +118,7 @@ class HttpSrv(object):
        self.bound: set[tuple[str, int]] = set()
        self.name = "hsrv" + nsuf
        self.mutex = threading.Lock()
+        self.u2mutex = threading.Lock()
        self.stopping = False

        self.tp_nthr = 0  # actual
@@ -149,6 +151,10 @@ class HttpSrv(object):
        zs = os.path.join(self.E.mod, "web", "deps", "prism.js.gz")
        self.prism = os.path.exists(zs)

+        self.ipa_nm = build_netmap(self.args.ipa)
+        self.xff_nm = build_netmap(self.args.xff_src)
+        self.xff_lan = build_netmap("lan")
+
        self.statics: set[str] = set()
        self._build_statics()

@@ -190,7 +196,7 @@ class HttpSrv(object):
            for fn in df:
                ap = absreal(os.path.join(dp, fn))
                self.statics.add(ap)
-                if ap.endswith(".gz") or ap.endswith(".br"):
+                if ap.endswith(".gz"):
                    self.statics.add(ap[:-3])

    def set_netdevs(self, netdevs: dict[str, Netdev]) -> None:
@@ -198,7 +204,7 @@ class HttpSrv(object):
        for ip, _ in self.bound:
            ips.add(ip)

-        self.nm = NetMap(list(ips), netdevs)
+        self.nm = NetMap(list(ips), list(netdevs))

    def start_threads(self, n: int) -> None:
        self.tp_nthr += n
@@ -220,7 +226,7 @@ class HttpSrv(object):
    def periodic(self) -> None:
        while True:
            time.sleep(2 if self.tp_ncli or self.ncli else 10)
-            with self.mutex:
+            with self.u2mutex, self.mutex:
                self.u2fh.clean()
                if self.tp_q:
                    self.tp_ncli = max(self.ncli, self.tp_ncli - 2)
--- a/copyparty/ico.py
+++ b/copyparty/ico.py
@@ -8,7 +8,7 @@ import re

 from .__init__ import PY2
 from .th_srv import HAVE_PIL, HAVE_PILF
-from .util import BytesIO  # type: ignore
+from .util import BytesIO, html_escape  # type: ignore


 class Ico(object):
@@ -31,10 +31,9 @@ class Ico(object):

        w = 100
        h = 30
-        if not self.args.th_no_crop and as_thumb:
+        if as_thumb:
            sw, sh = self.args.th_size.split("x")
            h = int(100.0 / (float(sw) / float(sh)))
-            w = 100

        if chrome:
            # cannot handle more than ~2000 unique SVGs
@@ -99,6 +98,6 @@ class Ico(object):
  fill="#{}" font-family="monospace" font-size="14px" style="letter-spacing:.5px">{}</text>
 </g></svg>
 """
-        svg = svg.format(h, c[:6], c[6:], ext)
+        svg = svg.format(h, c[:6], c[6:], html_escape(ext, True))

        return "image/svg+xml", svg.encode("utf-8")
--- a/copyparty/metrics.py
+++ b/copyparty/metrics.py
@@ -206,6 +206,9 @@ class Metrics(object):
            try:
                x = self.hsrv.broker.ask("up2k.get_unfinished")
                xs = x.get()
+                if not xs:
+                    raise Exception("up2k mutex acquisition timed out")
+
                xj = json.loads(xs)
                for ptop, (nbytes, nfiles) in xj.items():
                    tnbytes += nbytes
--- a/copyparty/multicast.py
+++ b/copyparty/multicast.py
@@ -110,7 +110,7 @@ class MCast(object):
            )

        ips = [x for x in ips if x not in ("::1", "127.0.0.1")]
-        ips = find_prefix(ips, netdevs)
+        ips = find_prefix(ips, list(netdevs))

        on = self.on[:]
        off = self.off[:]
--- a/copyparty/smbd.py
+++ b/copyparty/smbd.py
@@ -340,7 +340,7 @@ class SMB(object):
            yeet("blocked delete (no-del-acc): " + vpath)

        vpath = vpath.replace("\\", "/").lstrip("/")
-        self.hub.up2k.handle_rm(uname, "1.7.6.2", [vpath], [], False)
+        self.hub.up2k.handle_rm(uname, "1.7.6.2", [vpath], [], False, False)

    def _utime(self, vpath: str, times: tuple[float, float]) -> None:
        if not self.args.smbw:
--- a/copyparty/svchub.py
+++ b/copyparty/svchub.py
@@ -28,7 +28,7 @@ if True:  # pylint: disable=using-constant-test
    import typing
    from typing import Any, Optional, Union

-from .__init__ import ANYWIN, EXE, MACOS, TYPE_CHECKING, EnvParams, unicode
+from .__init__ import ANYWIN, E, EXE, MACOS, TYPE_CHECKING, EnvParams, unicode
 from .authsrv import BAD_CFG, AuthSrv
 from .cert import ensure_cert
 from .mtag import HAVE_FFMPEG, HAVE_FFPROBE
@@ -49,6 +49,7 @@ from .util import (
    ODict,
    alltrace,
    ansi_re,
+    build_netmap,
    min_ex,
    mp,
    odfusion,
@@ -94,7 +95,7 @@ class SvcHub(object):
        self.stopping = False
        self.stopped = False
        self.reload_req = False
-        self.reloading = False
+        self.reloading = 0
        self.stop_cond = threading.Condition()
        self.nsigs = 3
        self.retcode = 0
@@ -133,7 +134,7 @@ class SvcHub(object):
        if not self._process_config():
            raise Exception(BAD_CFG)

-        # for non-http clients (ftp)
+        # for non-http clients (ftp, tftp)
        self.bans: dict[str, int] = {}
        self.gpwd = Garda(self.args.ban_pw)
        self.g404 = Garda(self.args.ban_404)
@@ -154,6 +155,8 @@ class SvcHub(object):
        lg.handlers = [lh]
        lg.setLevel(logging.DEBUG)

+        self._check_env()
+
        if args.stackmon:
            start_stackmon(args.stackmon, 0)

@@ -268,6 +271,12 @@ class SvcHub(object):
            Daemon(self.start_ftpd, "start_ftpd")
            zms += "f" if args.ftp else "F"

+        if args.tftp:
+            from .tftpd import Tftpd
+
+            self.tftpd: Optional[Tftpd] = None
+            Daemon(self.start_ftpd, "start_tftpd")
+
        if args.smb:
            # impacket.dcerpc is noisy about listen timeouts
            sto = socket.getdefaulttimeout()
@@ -297,10 +306,12 @@ class SvcHub(object):

    def start_ftpd(self) -> None:
        time.sleep(30)
-        if self.ftpd:
-            return

-        self.restart_ftpd()
+        if hasattr(self, "ftpd") and not self.ftpd:
+            self.restart_ftpd()
+
+        if hasattr(self, "tftpd") and not self.tftpd:
+            self.restart_tftpd()

    def restart_ftpd(self) -> None:
        if not hasattr(self, "ftpd"):
@@ -317,6 +328,17 @@ class SvcHub(object):
        self.ftpd = Ftpd(self)
        self.log("root", "started FTPd")

+    def restart_tftpd(self) -> None:
+        if not hasattr(self, "tftpd"):
+            return
+
+        from .tftpd import Tftpd
+
+        if self.tftpd:
+            return  # todo
+
+        self.tftpd = Tftpd(self)
+
    def thr_httpsrv_up(self) -> None:
        time.sleep(1 if self.args.ign_ebind_all else 5)
        expected = self.broker.num_workers * self.tcpsrv.nsrv
@@ -366,6 +388,17 @@ class SvcHub(object):

        Daemon(self.sd_notify, "sd-notify")

+    def _check_env(self) -> None:
+        try:
+            files = os.listdir(E.cfg)
+        except:
+            files = []
+
+        hits = [x for x in files if x.lower().endswith(".conf")]
+        if hits:
+            t = "WARNING: found config files in [%s]: %s\n  config files are not expected here, and will NOT be loaded (unless your setup is intentionally hella funky)"
+            self.log("root", t % (E.cfg, ", ".join(hits)), 3)
+
    def _process_config(self) -> bool:
        al = self.args

@@ -432,6 +465,13 @@ class SvcHub(object):
            else:
                setattr(al, k, re.compile(vs))

+        for k in "tftp_lsf".split(" "):
+            vs = getattr(al, k)
+            if not vs or vs == "no":
+                setattr(al, k, None)
+            else:
+                setattr(al, k, re.compile("^" + vs + "$"))
+
        if not al.sus_urls:
            al.ban_url = "no"
        elif al.ban_url == "no":
@@ -439,11 +479,11 @@ class SvcHub(object):

        al.xff_hdr = al.xff_hdr.lower()
        al.idp_h_usr = al.idp_h_usr.lower()
-        # al.idp_h_grp = al.idp_h_grp.lower()
+        al.idp_h_grp = al.idp_h_grp.lower()
+        al.idp_h_key = al.idp_h_key.lower()

-        al.xff_re = self._ipa2re(al.xff_src)
-        al.ipa_re = self._ipa2re(al.ipa)
-        al.ftp_ipa_re = self._ipa2re(al.ftp_ipa or al.ipa)
+        al.ftp_ipa_nm = build_netmap(al.ftp_ipa or al.ipa)
+        al.tftp_ipa_nm = build_netmap(al.tftp_ipa or al.ipa)

        mte = ODict.fromkeys(DEF_MTE.split(","), True)
        al.mte = odfusion(mte, al.mte)
@@ -460,6 +500,25 @@ class SvcHub(object):
            if ptn:
                setattr(self.args, k, re.compile(ptn))

+        for k in ["idp_gsep"]:
+            ptn = getattr(self.args, k)
+            if "]" in ptn:
+                ptn = "]" + ptn.replace("]", "")
+            if "[" in ptn:
+                ptn = ptn.replace("[", "") + "["
+            if "-" in ptn:
+                ptn = ptn.replace("-", "") + "-"
+
+            ptn = ptn.replace("\\", "\\\\").replace("^", "\\^")
+            setattr(self.args, k, re.compile("[%s]" % (ptn,)))
+
+        try:
+            zf1, zf2 = self.args.rm_retry.split("/")
+            self.args.rm_re_t = float(zf1)
+            self.args.rm_re_r = float(zf2)
+        except:
+            raise Exception("invalid --rm-retry [%s]" % (self.args.rm_retry,))
+
        return True

    def _ipa2re(self, txt) -> Optional[re.Pattern]:
@@ -628,21 +687,37 @@ class SvcHub(object):
                self.log("root", "ssdp startup failed;\n" + min_ex(), 3)

    def reload(self) -> str:
-        if self.reloading:
-            return "cannot reload; already in progress"
+        with self.up2k.mutex:
+            if self.reloading:
+                return "cannot reload; already in progress"
+            self.reloading = 1

-        self.reloading = True
        Daemon(self._reload, "reloading")
        return "reload initiated"

-    def _reload(self) -> None:
-        self.log("root", "reload scheduled")
+    def _reload(self, rescan_all_vols: bool = True) -> None:
        with self.up2k.mutex:
+            if self.reloading != 1:
+                return
+            self.reloading = 2
+            self.log("root", "reloading config")
            self.asrv.reload()
-            self.up2k.reload()
+            self.up2k.reload(rescan_all_vols)
            self.broker.reload()
+            self.reloading = 0

-        self.reloading = False
+    def _reload_blocking(self, rescan_all_vols: bool = True) -> None:
+        while True:
+            with self.up2k.mutex:
+                if self.reloading < 2:
+                    self.reloading = 1
+                    break
+            time.sleep(0.05)
+
+        # try to handle multiple pending IdP reloads at once:
+        time.sleep(0.2)
+
+        self._reload(rescan_all_vols=rescan_all_vols)

    def stop_thr(self) -> None:
        while not self.stop_req:
--- a/copyparty/tcpsrv.py
+++ b/copyparty/tcpsrv.py
@@ -309,6 +309,7 @@ class TcpSrv(object):
        self.hub.start_zeroconf()
        gencert(self.log, self.args, self.netdevs)
        self.hub.restart_ftpd()
+        self.hub.restart_tftpd()

    def shutdown(self) -> None:
        self.stopping = True
--- a/copyparty/tftpd.py
+++ b/copyparty/tftpd.py
@@ -0,0 +1,433 @@
+# coding: utf-8
+from __future__ import print_function, unicode_literals
+
+try:
+    from types import SimpleNamespace
+except:
+
+    class SimpleNamespace(object):
+        def __init__(self, **attr):
+            self.__dict__.update(attr)
+
+
+import logging
+import os
+import re
+import socket
+import stat
+import threading
+import time
+from datetime import datetime
+
+try:
+    import inspect
+except:
+    pass
+
+from partftpy import (
+    TftpContexts,
+    TftpPacketFactory,
+    TftpPacketTypes,
+    TftpServer,
+    TftpStates,
+)
+from partftpy.TftpShared import TftpException
+
+from .__init__ import EXE, TYPE_CHECKING
+from .authsrv import VFS
+from .bos import bos
+from .util import BytesIO, Daemon, ODict, exclude_dotfiles, min_ex, runhook, undot
+
+if True:  # pylint: disable=using-constant-test
+    from typing import Any, Union
+
+if TYPE_CHECKING:
+    from .svchub import SvcHub
+
+
+lg = logging.getLogger("tftp")
+debug, info, warning, error = (lg.debug, lg.info, lg.warning, lg.error)
+
+
+def noop(*a, **ka) -> None:
+    pass
+
+
+def _serverInitial(self, pkt: Any, raddress: str, rport: int) -> bool:
+    info("connection from %s:%s", raddress, rport)
+    ret = _sinitial[0](self, pkt, raddress, rport)
+    nm = _hub[0].args.tftp_ipa_nm
+    if nm and not nm.map(raddress):
+        yeet("client rejected (--tftp-ipa): %s" % (raddress,))
+    return ret
+
+
+# patch ipa-check into partftpd (part 1/2)
+_hub: list["SvcHub"] = []
+_sinitial: list[Any] = []
+
+
+class Tftpd(object):
+    def __init__(self, hub: "SvcHub") -> None:
+        self.hub = hub
+        self.args = hub.args
+        self.asrv = hub.asrv
+        self.log = hub.log
+        self.mutex = threading.Lock()
+
+        _hub[:] = []
+        _hub.append(hub)
+
+        lg.setLevel(logging.DEBUG if self.args.tftpv else logging.INFO)
+        for x in ["partftpy", "partftpy.TftpStates", "partftpy.TftpServer"]:
+            lgr = logging.getLogger(x)
+            lgr.setLevel(logging.DEBUG if self.args.tftpv else logging.INFO)
+
+        if not self.args.tftpv and not self.args.tftpvv:
+            # contexts -> states -> packettypes -> shared
+            # contexts -> packetfactory
+            # packetfactory -> packettypes
+            Cs = [
+                TftpPacketTypes,
+                TftpPacketFactory,
+                TftpStates,
+                TftpContexts,
+                TftpServer,
+            ]
+            cbak = []
+            if not self.args.tftp_no_fast and not EXE:
+                try:
+                    import inspect
+
+                    ptn = re.compile(r"(^\s*)log\.debug\(.*\)$")
+                    for C in Cs:
+                        cbak.append(C.__dict__)
+                        src1 = inspect.getsource(C).split("\n")
+                        src2 = "\n".join([ptn.sub("\\1pass", ln) for ln in src1])
+                        cfn = C.__spec__.origin
+                        exec (compile(src2, filename=cfn, mode="exec"), C.__dict__)
+                except Exception:
+                    t = "failed to optimize tftp code; run with --tftp-noopt if there are issues:\n"
+                    self.log("tftp", t + min_ex(), 3)
+                    for n, zd in enumerate(cbak):
+                        Cs[n].__dict__ = zd
+
+            for C in Cs:
+                C.log.debug = noop
+
+        # patch ipa-check into partftpd (part 2/2)
+        _sinitial[:] = []
+        _sinitial.append(TftpStates.TftpServerState.serverInitial)
+        TftpStates.TftpServerState.serverInitial = _serverInitial
+
+        # patch vfs into partftpy
+        TftpContexts.open = self._open
+        TftpStates.open = self._open
+
+        fos = SimpleNamespace()
+        for k in os.__dict__:
+            try:
+                setattr(fos, k, getattr(os, k))
+            except:
+                pass
+        fos.access = self._access
+        fos.mkdir = self._mkdir
+        fos.unlink = self._unlink
+        fos.sep = "/"
+        TftpContexts.os = fos
+        TftpServer.os = fos
+        TftpStates.os = fos
+
+        fop = SimpleNamespace()
+        for k in os.path.__dict__:
+            try:
+                setattr(fop, k, getattr(os.path, k))
+            except:
+                pass
+        fop.abspath = self._p_abspath
+        fop.exists = self._p_exists
+        fop.isdir = self._p_isdir
+        fop.normpath = self._p_normpath
+        fos.path = fop
+
+        self._disarm(fos)
+
+        ip = next((x for x in self.args.i if ":" not in x), None)
+        if not ip:
+            self.log("tftp", "IPv6 not supported for tftp; listening on 0.0.0.0", 3)
+            ip = "0.0.0.0"
+
+        self.port = int(self.args.tftp)
+        self.srv = []
+        self.ips = []
+
+        ports = []
+        if self.args.tftp_pr:
+            p1, p2 = [int(x) for x in self.args.tftp_pr.split("-")]
+            ports = list(range(p1, p2 + 1))
+
+        ips = self.args.i
+        if "::" in ips:
+            ips.append("0.0.0.0")
+
+        if self.args.ftp4:
+            ips = [x for x in ips if ":" not in x]
+
+        ips = list(ODict.fromkeys(ips))  # dedup
+
+        for ip in ips:
+            name = "tftp_%s" % (ip,)
+            Daemon(self._start, name, [ip, ports])
+            time.sleep(0.2)  # give dualstack a chance
+
+    def nlog(self, msg: str, c: Union[int, str] = 0) -> None:
+        self.log("tftp", msg, c)
+
+    def _start(self, ip, ports):
+        fam = socket.AF_INET6 if ":" in ip else socket.AF_INET
+        have_been_alive = False
+        while True:
+            srv = TftpServer.TftpServer("/", self._ls)
+            with self.mutex:
+                self.srv.append(srv)
+                self.ips.append(ip)
+
+            try:
+                # this is the listen loop; it should block forever
+                srv.listen(ip, self.port, af_family=fam, ports=ports)
+            except:
+                with self.mutex:
+                    self.srv.remove(srv)
+                    self.ips.remove(ip)
+
+                try:
+                    srv.sock.close()
+                except:
+                    pass
+
+                try:
+                    bound = bool(srv.listenport)
+                except:
+                    bound = False
+
+                if bound:
+                    # this instance has managed to bind at least once
+                    have_been_alive = True
+
+                if have_been_alive:
+                    t = "tftp server [%s]:%d crashed; restarting in 3 sec:\n%s"
+                    error(t, ip, self.port, min_ex())
+                    time.sleep(3)
+                    continue
+
+                # server failed to start; could be due to dualstack (ipv6 managed to bind and this is ipv4)
+                if ip != "0.0.0.0" or "::" not in self.ips:
+                    # nope, it's fatal
+                    t = "tftp server [%s]:%d failed to start:\n%s"
+                    error(t, ip, self.port, min_ex())
+
+                # yep; ignore
+                # (TODO: move the "listening @ ..." infolog in partftpy to
+                #   after the bind attempt so it doesn't print twice)
+                return
+
+            info("tftp server [%s]:%d terminated", ip, self.port)
+            break
+
+    def stop(self):
+        with self.mutex:
+            srvs = self.srv[:]
+
+        for srv in srvs:
+            srv.stop()
+
+    def _v2a(self, caller: str, vpath: str, perms: list, *a: Any) -> tuple[VFS, str]:
+        vpath = vpath.replace("\\", "/").lstrip("/")
+        if not perms:
+            perms = [True, True]
+
+        debug('%s("%s", %s) %s\033[K\033[0m', caller, vpath, str(a), perms)
+        vfs, rem = self.asrv.vfs.get(vpath, "*", *perms)
+        return vfs, vfs.canonical(rem)
+
+    def _ls(self, vpath: str, raddress: str, rport: int, force=False) -> Any:
+        # generate file listing if vpath is dir.txt and return as file object
+        if not force:
+            vpath, fn = os.path.split(vpath.replace("\\", "/"))
+            ptn = self.args.tftp_lsf
+            if not ptn or not ptn.match(fn.lower()):
+                return None
+
+        vn, rem = self.asrv.vfs.get(vpath, "*", True, False)
+        fsroot, vfs_ls, vfs_virt = vn.ls(
+            rem,
+            "*",
+            not self.args.no_scandir,
+            [[True, False]],
+        )
+        dnames = set([x[0] for x in vfs_ls if stat.S_ISDIR(x[1].st_mode)])
+        dirs1 = [(v.st_mtime, v.st_size, k + "/") for k, v in vfs_ls if k in dnames]
+        fils1 = [(v.st_mtime, v.st_size, k) for k, v in vfs_ls if k not in dnames]
+        real1 = dirs1 + fils1
+        realt = [(datetime.fromtimestamp(mt), sz, fn) for mt, sz, fn in real1]
+        reals = [
+            (
+                "%04d-%02d-%02d %02d:%02d:%02d"
+                % (
+                    zd.year,
+                    zd.month,
+                    zd.day,
+                    zd.hour,
+                    zd.minute,
+                    zd.second,
+                ),
+                sz,
+                fn,
+            )
+            for zd, sz, fn in realt
+        ]
+        virs = [("????-??-?? ??:??:??", 0, k + "/") for k in vfs_virt.keys()]
+        ls = virs + reals
+
+        if "*" not in vn.axs.udot:
+            names = set(exclude_dotfiles([x[2] for x in ls]))
+            ls = [x for x in ls if x[2] in names]
+
+        try:
+            biggest = max([x[1] for x in ls])
+        except:
+            biggest = 0
+
+        perms = []
+        if "*" in vn.axs.uread:
+            perms.append("read")
+        if "*" in vn.axs.udot:
+            perms.append("hidden")
+        if "*" in vn.axs.uwrite:
+            if "*" in vn.axs.udel:
+                perms.append("overwrite")
+            else:
+                perms.append("write")
+
+        fmt = "{{}}  {{:{},}}  {{}}"
+        fmt = fmt.format(len("{:,}".format(biggest)))
+        retl = ["# permissions: %s" % (", ".join(perms),)]
+        retl += [fmt.format(*x) for x in ls]
+        ret = "\n".join(retl).encode("utf-8", "replace")
+        return BytesIO(ret + b"\n")
+
+    def _open(self, vpath: str, mode: str, *a: Any, **ka: Any) -> Any:
+        rd = wr = False
+        if mode == "rb":
+            rd = True
+        elif mode == "wb":
+            wr = True
+        else:
+            raise Exception("bad mode %s" % (mode,))
+
+        vfs, ap = self._v2a("open", vpath, [rd, wr])
+        if wr:
+            if "*" not in vfs.axs.uwrite:
+                yeet("blocked write; folder not world-writable: /%s" % (vpath,))
+
+            if bos.path.exists(ap) and "*" not in vfs.axs.udel:
+                yeet("blocked write; folder not world-deletable: /%s" % (vpath,))
+
+            xbu = vfs.flags.get("xbu")
+            if xbu and not runhook(
+                self.nlog, xbu, ap, vpath, "", "", 0, 0, "8.3.8.7", 0, ""
+            ):
+                yeet("blocked by xbu server config: " + vpath)
+
+        if not self.args.tftp_nols and bos.path.isdir(ap):
+            return self._ls(vpath, "", 0, True)
+
+        return open(ap, mode, *a, **ka)
+
+    def _mkdir(self, vpath: str, *a) -> None:
+        vfs, ap = self._v2a("mkdir", vpath, [])
+        if "*" not in vfs.axs.uwrite:
+            yeet("blocked mkdir; folder not world-writable: /%s" % (vpath,))
+
+        return bos.mkdir(ap)
+
+    def _unlink(self, vpath: str) -> None:
+        # return bos.unlink(self._v2a("stat", vpath, *a)[1])
+        vfs, ap = self._v2a("delete", vpath, [True, False, False, True])
+
+        try:
+            inf = bos.stat(ap)
+        except:
+            return
+
+        if not stat.S_ISREG(inf.st_mode) or inf.st_size:
+            yeet("attempted delete of non-empty file")
+
+        vpath = vpath.replace("\\", "/").lstrip("/")
+        self.hub.up2k.handle_rm("*", "8.3.8.7", [vpath], [], False, False)
+
+    def _access(self, *a: Any) -> bool:
+        return True
+
+    def _p_abspath(self, vpath: str) -> str:
+        return "/" + undot(vpath)
+
+    def _p_normpath(self, *a: Any) -> str:
+        return ""
+
+    def _p_exists(self, vpath: str) -> bool:
+        try:
+            ap = self._v2a("p.exists", vpath, [False, False])[1]
+            bos.stat(ap)
+            return True
+        except:
+            return False
+
+    def _p_isdir(self, vpath: str) -> bool:
+        try:
+            st = bos.stat(self._v2a("p.isdir", vpath, [False, False])[1])
+            ret = stat.S_ISDIR(st.st_mode)
+            return ret
+        except:
+            return False
+
+    def _hook(self, *a: Any, **ka: Any) -> None:
+        src = inspect.currentframe().f_back.f_code.co_name
+        error("\033[31m%s:hook(%s)\033[0m", src, a)
+        raise Exception("nope")
+
+    def _disarm(self, fos: SimpleNamespace) -> None:
+        fos.chmod = self._hook
+        fos.chown = self._hook
+        fos.close = self._hook
+        fos.ftruncate = self._hook
+        fos.lchown = self._hook
+        fos.link = self._hook
+        fos.listdir = self._hook
+        fos.lstat = self._hook
+        fos.open = self._hook
+        fos.remove = self._hook
+        fos.rename = self._hook
+        fos.replace = self._hook
+        fos.scandir = self._hook
+        fos.stat = self._hook
+        fos.symlink = self._hook
+        fos.truncate = self._hook
+        fos.utime = self._hook
+        fos.walk = self._hook
+
+        fos.path.expanduser = self._hook
+        fos.path.expandvars = self._hook
+        fos.path.getatime = self._hook
+        fos.path.getctime = self._hook
+        fos.path.getmtime = self._hook
+        fos.path.getsize = self._hook
+        fos.path.isabs = self._hook
+        fos.path.isfile = self._hook
+        fos.path.islink = self._hook
+        fos.path.realpath = self._hook
+
+
+def yeet(msg: str) -> None:
+    warning(msg)
+    raise TftpException(msg)
--- a/copyparty/th_cli.py
+++ b/copyparty/th_cli.py
@@ -78,16 +78,34 @@ class ThumbCli(object):
        if rem.startswith(".hist/th/") and rem.split(".")[-1] in ["webp", "jpg", "png"]:
            return os.path.join(ptop, rem)

-        if fmt == "j" and self.args.th_no_jpg:
-            fmt = "w"
+        if fmt[:1] in "jw":
+            sfmt = fmt[:1]

-        if fmt == "w":
-            if (
-                self.args.th_no_webp
-                or (is_img and not self.can_webp)
-                or (self.args.th_ff_jpg and (not is_img or preferred == "ff"))
-            ):
-                fmt = "j"
+            if sfmt == "j" and self.args.th_no_jpg:
+                sfmt = "w"
+
+            if sfmt == "w":
+                if (
+                    self.args.th_no_webp
+                    or (is_img and not self.can_webp)
+                    or (self.args.th_ff_jpg and (not is_img or preferred == "ff"))
+                ):
+                    sfmt = "j"
+
+            vf_crop = dbv.flags["crop"]
+            vf_th3x = dbv.flags["th3x"]
+
+            if "f" in vf_crop:
+                sfmt += "f" if "n" in vf_crop else ""
+            else:
+                sfmt += "f" if "f" in fmt else ""
+
+            if "f" in vf_th3x:
+                sfmt += "3" if "y" in vf_th3x else ""
+            else:
+                sfmt += "3" if "3" in fmt else ""
+
+            fmt = sfmt

        histpath = self.asrv.vfs.histtab.get(ptop)
        if not histpath:
--- a/copyparty/th_srv.py
+++ b/copyparty/th_srv.py
@@ -28,6 +28,7 @@ from .util import (
    runcmd,
    statdir,
    vsplit,
+    wunlink,
 )

 if True:  # pylint: disable=using-constant-test
@@ -96,8 +97,8 @@ def thumb_path(histpath: str, rem: str, mtime: float, fmt: str, ffa: set[str]) -

    # spectrograms are never cropped; strip fullsize flag
    ext = rem.split(".")[-1].lower()
-    if ext in ffa and fmt in ("wf", "jf"):
-        fmt = fmt[:1]
+    if ext in ffa and fmt[:2] in ("wf", "jf"):
+        fmt = fmt.replace("f", "")

    rd += "\n" + fmt
    h = hashlib.sha512(afsenc(rd)).digest()
@@ -129,6 +130,8 @@ class ThumbSrv(object):

        self.mutex = threading.Lock()
        self.busy: dict[str, list[threading.Condition]] = {}
+        self.ram: dict[str, float] = {}
+        self.memcond = threading.Condition(self.mutex)
        self.stopping = False
        self.nthr = max(1, self.args.th_mt)

@@ -197,9 +200,10 @@ class ThumbSrv(object):
        with self.mutex:
            return not self.nthr

-    def getres(self, vn: VFS) -> tuple[int, int]:
+    def getres(self, vn: VFS, fmt: str) -> tuple[int, int]:
+        mul = 3 if "3" in fmt else 1
        w, h = vn.flags["thsize"].split("x")
-        return int(w), int(h)
+        return int(w) * mul, int(h) * mul

    def get(self, ptop: str, rem: str, mtime: float, fmt: str) -> Optional[str]:
        histpath = self.asrv.vfs.histtab.get(ptop)
@@ -214,7 +218,7 @@ class ThumbSrv(object):
        with self.mutex:
            try:
                self.busy[tpath].append(cond)
-                self.log("wait {}".format(tpath))
+                self.log("joined waiting room for %s" % (tpath,))
            except:
                thdir = os.path.dirname(tpath)
                bos.makedirs(os.path.join(thdir, "w"))
@@ -265,6 +269,23 @@ class ThumbSrv(object):
            "ffa": self.fmt_ffa,
        }

+    def wait4ram(self, need: float, ttpath: str) -> None:
+        ram = self.args.th_ram_max
+        if need > ram * 0.99:
+            t = "file too big; need %.2f GiB RAM, but --th-ram-max is only %.1f"
+            raise Exception(t % (need, ram))
+
+        while True:
+            with self.mutex:
+                used = sum([v for k, v in self.ram.items() if k != ttpath]) + need
+                if used < ram:
+                    # self.log("XXX self.ram: %s" % (self.ram,), 5)
+                    self.ram[ttpath] = need
+                    return
+            with self.memcond:
+                # self.log("at RAM limit; used %.2f GiB, need %.2f more" % (used-need, need), 1)
+                self.memcond.wait(3)
+
    def worker(self) -> None:
        while not self.stopping:
            task = self.q.get()
@@ -298,7 +319,7 @@ class ThumbSrv(object):
            tdir, tfn = os.path.split(tpath)
            ttpath = os.path.join(tdir, "w", tfn)
            try:
-                bos.unlink(ttpath)
+                wunlink(self.log, ttpath, vn.flags)
            except:
                pass

@@ -318,7 +339,7 @@ class ThumbSrv(object):
                    else:
                        # ffmpeg may spawn empty files on windows
                        try:
-                            os.unlink(ttpath)
+                            wunlink(self.log, ttpath, vn.flags)
                        except:
                            pass

@@ -330,17 +351,21 @@ class ThumbSrv(object):
            with self.mutex:
                subs = self.busy[tpath]
                del self.busy[tpath]
+                self.ram.pop(ttpath, None)

            for x in subs:
                with x:
                    x.notify_all()

+            with self.memcond:
+                self.memcond.notify_all()
+
        with self.mutex:
            self.nthr -= 1

    def fancy_pillow(self, im: "Image.Image", fmt: str, vn: VFS) -> "Image.Image":
        # exif_transpose is expensive (loads full image + unconditional copy)
-        res = self.getres(vn)
+        res = self.getres(vn, fmt)
        r = max(*res) * 2
        im.thumbnail((r, r), resample=Image.LANCZOS)
        try:
@@ -355,7 +380,7 @@ class ThumbSrv(object):
        if rot in rots:
            im = im.transpose(rots[rot])

-        if fmt.endswith("f"):
+        if "f" in fmt:
            im.thumbnail(res, resample=Image.LANCZOS)
        else:
            iw, ih = im.size
@@ -366,12 +391,13 @@ class ThumbSrv(object):
        return im

    def conv_pil(self, abspath: str, tpath: str, fmt: str, vn: VFS) -> None:
+        self.wait4ram(0.2, tpath)
        with Image.open(fsenc(abspath)) as im:
            try:
                im = self.fancy_pillow(im, fmt, vn)
            except Exception as ex:
                self.log("fancy_pillow {}".format(ex), "90")
-                im.thumbnail(self.getres(vn))
+                im.thumbnail(self.getres(vn, fmt))

            fmts = ["RGB", "L"]
            args = {"quality": 40}
@@ -395,11 +421,12 @@ class ThumbSrv(object):
            im.save(tpath, **args)

    def conv_vips(self, abspath: str, tpath: str, fmt: str, vn: VFS) -> None:
+        self.wait4ram(0.2, tpath)
        crops = ["centre", "none"]
-        if fmt.endswith("f"):
+        if "f" in fmt:
            crops = ["none"]

-        w, h = self.getres(vn)
+        w, h = self.getres(vn, fmt)
        kw = {"height": h, "size": "down", "intent": "relative"}

        for c in crops:
@@ -415,6 +442,7 @@ class ThumbSrv(object):
        img.write_to_file(tpath, Q=40)

    def conv_ffmpeg(self, abspath: str, tpath: str, fmt: str, vn: VFS) -> None:
+        self.wait4ram(0.2, tpath)
        ret, _ = ffprobe(abspath, int(vn.flags["convt"] / 2))
        if not ret:
            return
@@ -427,12 +455,12 @@ class ThumbSrv(object):
            seek = [b"-ss", "{:.0f}".format(dur / 3).encode("utf-8")]

        scale = "scale={0}:{1}:force_original_aspect_ratio="
-        if fmt.endswith("f"):
+        if "f" in fmt:
            scale += "decrease,setsar=1:1"
        else:
            scale += "increase,crop={0}:{1},setsar=1:1"

-        res = self.getres(vn)
+        res = self.getres(vn, fmt)
        bscale = scale.format(*list(res)).encode("utf-8")
        # fmt: off
        cmd = [
@@ -517,8 +545,21 @@ class ThumbSrv(object):
        if "ac" not in ret:
            raise Exception("not audio")

-        flt = (
-            b"[0:a:0]"
+        # jt_versi.xm: 405M/839s
+        dur = ret[".dur"][1] if ".dur" in ret else 300
+        need = 0.2 + dur / 3000
+        speedup = b""
+        if need > self.args.th_ram_max * 0.7:
+            self.log("waves too big (need %.2f GiB); trying to optimize" % (need,))
+            need = 0.2 + dur / 4200  # only helps about this much...
+            speedup = b"aresample=8000,"
+        if need > self.args.th_ram_max * 0.96:
+            raise Exception("file too big; cannot waves")
+
+        self.wait4ram(need, tpath)
+
+        flt = b"[0:a:0]" + speedup
+        flt += (
            b"compand=.3|.3:1|1:-90/-60|-60/-40|-40/-30|-20/-20:6:0:-90:0.2"
            b",volume=2"
            b",showwavespic=s=2048x64:colors=white"
@@ -545,7 +586,20 @@ class ThumbSrv(object):
        if "ac" not in ret:
            raise Exception("not audio")

-        fc = "[0:a:0]aresample=48000{},showspectrumpic=s=640x512,crop=780:544:70:50[o]"
+        # https://trac.ffmpeg.org/ticket/10797
+        # expect 1 GiB every 600 seconds when duration is tricky;
+        # simple filetypes are generally safer so let's special-case those
+        safe = ("flac", "wav", "aif", "aiff", "opus")
+        coeff = 1800 if abspath.split(".")[-1].lower() in safe else 600
+        dur = ret[".dur"][1] if ".dur" in ret else 300
+        need = 0.2 + dur / coeff
+        self.wait4ram(need, tpath)
+
+        fc = "[0:a:0]aresample=48000{},showspectrumpic=s="
+        if "3" in fmt:
+            fc += "1280x1024,crop=1420:1056:70:48[o]"
+        else:
+            fc += "640x512,crop=780:544:70:48[o]"

        if self.args.th_ff_swr:
            fco = ":filter_size=128:cutoff=0.877"
@@ -587,6 +641,7 @@ class ThumbSrv(object):
        if self.args.no_acode:
            raise Exception("disabled in server config")

+        self.wait4ram(0.2, tpath)
        ret, _ = ffprobe(abspath, int(vn.flags["convt"] / 2))
        if "ac" not in ret:
            raise Exception("not audio")
@@ -602,7 +657,7 @@ class ThumbSrv(object):
        if want_caf:
            tmp_opus = tpath + ".opus"
            try:
-                bos.unlink(tmp_opus)
+                wunlink(self.log, tmp_opus, vn.flags)
            except:
                pass

@@ -669,7 +724,7 @@ class ThumbSrv(object):

        if tmp_opus != tpath:
            try:
-                bos.unlink(tmp_opus)
+                wunlink(self.log, tmp_opus, vn.flags)
            except:
                pass

@@ -696,7 +751,10 @@ class ThumbSrv(object):
                else:
                    self.log("\033[Jcln {} ({})/\033[A".format(histpath, vol))

-                ndirs += self.clean(histpath)
+                try:
+                    ndirs += self.clean(histpath)
+                except Exception as ex:
+                    self.log("\033[Jcln err in %s: %r" % (histpath, ex), 3)

            self.log("\033[Jcln ok; rm {} dirs".format(ndirs))

--- a/copyparty/up2k.py
+++ b/copyparty/up2k.py
@@ -21,7 +21,7 @@ from copy import deepcopy

 from queue import Queue

-from .__init__ import ANYWIN, PY2, TYPE_CHECKING, WINDOWS
+from .__init__ import ANYWIN, PY2, TYPE_CHECKING, WINDOWS, E
 from .authsrv import LEELOO_DALLAS, SSEELOG, VFS, AuthSrv
 from .bos import bos
 from .cfg import vf_bmap, vf_cmap, vf_vmap
@@ -35,6 +35,7 @@ from .util import (
    Pebkac,
    ProgressPrinter,
    absreal,
+    alltrace,
    atomic_move,
    db_ex_chk,
    dir_is_empty,
@@ -64,6 +65,7 @@ from .util import (
    vsplit,
    w8b64dec,
    w8b64enc,
+    wunlink,
 )

 try:
@@ -86,6 +88,9 @@ zsg = "avif,avifs,bmp,gif,heic,heics,heif,heifs,ico,j2p,j2k,jp2,jpeg,jpg,jpx,png
 CV_EXTS = set(zsg.split(","))


+HINT_HISTPATH = "you could try moving the database to another location (preferably an SSD or NVME drive) using either the --hist argument (global option for all volumes), or the hist volflag (just for this volume)"
+
+
 class Dbw(object):
    def __init__(self, c: "sqlite3.Cursor", n: int, t: float) -> None:
        self.c = c
@@ -149,7 +154,7 @@ class Up2k(object):
        self.hashq: Queue[
            tuple[str, str, dict[str, Any], str, str, str, float, str, bool]
        ] = Queue()
-        self.tagq: Queue[tuple[str, str, str, str, str, float]] = Queue()
+        self.tagq: Queue[tuple[str, str, str, str, int, str, float]] = Queue()
        self.tag_event = threading.Condition()
        self.hashq_mutex = threading.Lock()
        self.n_hashq = 0
@@ -194,11 +199,16 @@ class Up2k(object):

        Daemon(self.deferred_init, "up2k-deferred-init")

-    def reload(self) -> None:
-        self.gid += 1
-        self.log("reload #{} initiated".format(self.gid))
+    def reload(self, rescan_all_vols: bool) -> None:
+        """mutex me"""
+        self.log("reload #{} scheduled".format(self.gid + 1))
        all_vols = self.asrv.vfs.all_vols
-        self.rescan(all_vols, list(all_vols.keys()), True, False)
+
+        scan_vols = [k for k, v in all_vols.items() if v.realpath not in self.registry]
+        if rescan_all_vols:
+            scan_vols = list(all_vols.keys())
+
+        self._rescan(all_vols, scan_vols, True, False)

    def deferred_init(self) -> None:
        all_vols = self.asrv.vfs.all_vols
@@ -227,8 +237,6 @@ class Up2k(object):
                for n in range(max(1, self.args.mtag_mt)):
                    Daemon(self._tagger, "tagger-{}".format(n))

-                Daemon(self._run_all_mtp, "up2k-mtp-init")
-
    def log(self, msg: str, c: Union[int, str] = 0) -> None:
        if self.pp:
            msg += "\033[K"
@@ -277,9 +285,48 @@ class Up2k(object):
        }
        return json.dumps(ret, indent=4)

+    def get_unfinished_by_user(self, uname, ip) -> str:
+        if PY2 or not self.mutex.acquire(timeout=2):
+            return '[{"timeout":1}]'
+
+        ret: list[tuple[int, str, int, int, int]] = []
+        try:
+            for ptop, tab2 in self.registry.items():
+                cfg = self.flags.get(ptop, {}).get("u2abort", 1)
+                if not cfg:
+                    continue
+                addr = (ip or "\n") if cfg in (1, 2) else ""
+                user = (uname or "\n") if cfg in (1, 3) else ""
+                drp = self.droppable.get(ptop, {})
+                for wark, job in tab2.items():
+                    if (
+                        wark in drp
+                        or (user and user != job["user"])
+                        or (addr and addr != job["addr"])
+                    ):
+                        continue
+
+                    zt5 = (
+                        int(job["t0"]),
+                        djoin(job["vtop"], job["prel"], job["name"]),
+                        job["size"],
+                        len(job["need"]),
+                        len(job["hash"]),
+                    )
+                    ret.append(zt5)
+        finally:
+            self.mutex.release()
+
+        ret.sort(reverse=True)
+        ret2 = [
+            {"at": at, "vp": "/" + vp, "pd": 100 - ((nn * 100) // (nh or 1)), "sz": sz}
+            for (at, vp, sz, nn, nh) in ret
+        ]
+        return json.dumps(ret2, indent=0)
+
    def get_unfinished(self) -> str:
        if PY2 or not self.mutex.acquire(timeout=0.5):
-            return "{}"
+            return ""

        ret: dict[str, tuple[int, int]] = {}
        try:
@@ -332,14 +379,21 @@ class Up2k(object):
    def rescan(
        self, all_vols: dict[str, VFS], scan_vols: list[str], wait: bool, fscan: bool
    ) -> str:
+        with self.mutex:
+            return self._rescan(all_vols, scan_vols, wait, fscan)
+
+    def _rescan(
+        self, all_vols: dict[str, VFS], scan_vols: list[str], wait: bool, fscan: bool
+    ) -> str:
+        """mutex me"""
        if not wait and self.pp:
            return "cannot initiate; scan is already in progress"

-        args = (all_vols, scan_vols, fscan)
+        self.gid += 1
        Daemon(
            self.init_indexes,
            "up2k-rescan-{}".format(scan_vols[0] if scan_vols else "all"),
-            args,
+            (all_vols, scan_vols, fscan, self.gid),
        )
        return ""

@@ -451,7 +505,7 @@ class Up2k(object):
                    if vp:
                        fvp = "%s/%s" % (vp, fvp)

-                    self._handle_rm(LEELOO_DALLAS, "", fvp, [], True)
+                    self._handle_rm(LEELOO_DALLAS, "", fvp, [], True, False)
                    nrm += 1

            if nrm:
@@ -547,7 +601,7 @@ class Up2k(object):
            runihook(self.log, cmd, vol, ups)

    def _vis_job_progress(self, job: dict[str, Any]) -> str:
-        perc = 100 - (len(job["need"]) * 100.0 / len(job["hash"]))
+        perc = 100 - (len(job["need"]) * 100.0 / (len(job["hash"]) or 1))
        path = djoin(job["ptop"], job["prel"], job["name"])
        return "{:5.1f}% {}".format(perc, path)

@@ -570,19 +624,32 @@ class Up2k(object):
        return True, ret

    def init_indexes(
-        self, all_vols: dict[str, VFS], scan_vols: list[str], fscan: bool
+        self, all_vols: dict[str, VFS], scan_vols: list[str], fscan: bool, gid: int = 0
    ) -> bool:
-        gid = self.gid
-        while self.pp and gid == self.gid:
-            time.sleep(0.1)
+        if not gid:
+            with self.mutex:
+                gid = self.gid

-        if gid != self.gid:
-            return False
+        nspin = 0
+        while True:
+            nspin += 1
+            if nspin > 1:
+                time.sleep(0.1)
+
+            with self.mutex:
+                if gid != self.gid:
+                    return False
+
+                if self.pp:
+                    continue
+
+                self.pp = ProgressPrinter(self.log, self.args)
+
+            break

        if gid:
-            self.log("reload #{} running".format(self.gid))
+            self.log("reload #%d running" % (gid,))

-        self.pp = ProgressPrinter()
        vols = list(all_vols.values())
        t0 = time.time()
        have_e2d = False
@@ -766,20 +833,14 @@ class Up2k(object):
            msg = "could not read tags because no backends are available (Mutagen or FFprobe)"
            self.log(msg, c=1)

-        thr = None
-        if self.mtag:
-            t = "online (running mtp)"
-            if scan_vols:
-                thr = Daemon(self._run_all_mtp, "up2k-mtp-scan", r=False)
-        else:
-            self.pp = None
-            t = "online, idle"
-
+        t = "online (running mtp)" if self.mtag else "online, idle"
        for vol in vols:
            self.volstate[vol.vpath] = t

-        if thr:
-            thr.start()
+        if self.mtag:
+            Daemon(self._run_all_mtp, "up2k-mtp-scan", (gid,))
+        else:
+            self.pp = None

        return have_e2d

@@ -808,7 +869,7 @@ class Up2k(object):
        ft = "\033[0;32m{}{:.0}"
        ff = "\033[0;35m{}{:.0}"
        fv = "\033[0;36m{}:\033[90m{}"
-        fx = set(("html_head",))
+        fx = set(("html_head", "rm_re_t", "rm_re_r"))
        fd = vf_bmap()
        fd.update(vf_cmap())
        fd.update(vf_vmap())
@@ -891,7 +952,7 @@ class Up2k(object):
            return None

        try:
-            cur = self._open_db(db_path)
+            cur = self._open_db_wd(db_path)

            # speeds measured uploading 520 small files on a WD20SPZX (SMR 2.5" 5400rpm 4kb)
            dbd = flags["dbd"]
@@ -934,8 +995,8 @@ class Up2k(object):

            return cur, db_path
        except:
-            msg = "cannot use database at [{}]:\n{}"
-            self.log(msg.format(ptop, traceback.format_exc()))
+            msg = "ERROR: cannot use database at [%s]:\n%s\n\033[33mhint: %s\n"
+            self.log(msg % (db_path, traceback.format_exc(), HINT_HISTPATH), 1)

        return None

@@ -1228,7 +1289,7 @@ class Up2k(object):
            abspath = os.path.join(cdir, fn)
            nohash = reh.search(abspath) if reh else False

-            sql = "select w, mt, sz, at from up where rd = ? and fn = ?"
+            sql = "select w, mt, sz, ip, at from up where rd = ? and fn = ?"
            try:
                c = db.c.execute(sql, (rd, fn))
            except:
@@ -1237,7 +1298,7 @@ class Up2k(object):
            in_db = list(c.fetchall())
            if in_db:
                self.pp.n -= 1
-                dw, dts, dsz, at = in_db[0]
+                dw, dts, dsz, ip, at = in_db[0]
                if len(in_db) > 1:
                    t = "WARN: multiple entries: [{}] => [{}] |{}|\n{}"
                    rep_db = "\n".join([repr(x) for x in in_db])
@@ -1259,6 +1320,8 @@ class Up2k(object):
                db.n += 1
                in_db = []
            else:
+                dw = ""
+                ip = ""
                at = 0

            self.pp.msg = "a%d %s" % (self.pp.n, abspath)
@@ -1282,8 +1345,12 @@ class Up2k(object):

                wark = up2k_wark_from_hashlist(self.salt, sz, hashes)

+            if dw and dw != wark:
+                ip = ""
+                at = 0
+
            # skip upload hooks by not providing vflags
-            self.db_add(db.c, {}, rd, fn, lmod, sz, "", "", wark, "", "", "", at)
+            self.db_add(db.c, {}, rd, fn, lmod, sz, "", "", wark, "", "", ip, at)
            db.n += 1
            ret += 1
            td = time.time() - db.t
@@ -1798,26 +1865,28 @@ class Up2k(object):
        self.pending_tags = []
        return ret

-    def _run_all_mtp(self) -> None:
-        gid = self.gid
+    def _run_all_mtp(self, gid: int) -> None:
        t0 = time.time()
        for ptop, flags in self.flags.items():
            if "mtp" in flags:
                if ptop not in self.entags:
                    t = "skipping mtp for unavailable volume {}"
                    self.log(t.format(ptop), 1)
-                    continue
-                self._run_one_mtp(ptop, gid)
+                else:
+                    self._run_one_mtp(ptop, gid)
+
+            vtop = "\n"
+            for vol in self.asrv.vfs.all_vols.values():
+                if vol.realpath == ptop:
+                    vtop = vol.vpath
+            if "running mtp" in self.volstate.get(vtop, ""):
+                self.volstate[vtop] = "online, idle"

        td = time.time() - t0
        msg = "mtp finished in {:.2f} sec ({})"
        self.log(msg.format(td, s2hms(td, True)))

        self.pp = None
-        for k in list(self.volstate.keys()):
-            if "OFFLINE" not in self.volstate[k]:
-                self.volstate[k] = "online, idle"
-
        if self.args.exit == "idx":
            self.hub.sigterm()

@@ -2044,12 +2113,13 @@ class Up2k(object):
                return

            try:
+                st = bos.stat(qe.abspath)
                if not qe.mtp:
                    if self.args.mtag_vv:
                        t = "tag-thr: {}({})"
                        self.log(t.format(self.mtag.backend, qe.abspath), "90")

-                    tags = self.mtag.get(qe.abspath)
+                    tags = self.mtag.get(qe.abspath) if st.st_size else {}
                else:
                    if self.args.mtag_vv:
                        t = "tag-thr: {}({})"
@@ -2090,11 +2160,16 @@ class Up2k(object):
        """will mutex"""
        assert self.mtag

-        if not bos.path.isfile(abspath):
+        try:
+            st = bos.stat(abspath)
+        except:
+            return 0
+
+        if not stat.S_ISREG(st.st_mode):
            return 0

        try:
-            tags = self.mtag.get(abspath)
+            tags = self.mtag.get(abspath) if st.st_size else {}
        except Exception as ex:
            self._log_tag_err("", abspath, ex)
            return 0
@@ -2148,6 +2223,46 @@ class Up2k(object):
    def _trace(self, msg: str) -> None:
        self.log("ST: {}".format(msg))

+    def _open_db_wd(self, db_path: str) -> "sqlite3.Cursor":
+        ok: list[int] = []
+        Daemon(self._open_db_timeout, "opendb_watchdog", [db_path, ok])
+        try:
+            return self._open_db(db_path)
+        finally:
+            ok.append(1)
+
+    def _open_db_timeout(self, db_path, ok: list[int]) -> None:
+        # give it plenty of time due to the count statement (and wisdom from byte's box)
+        for _ in range(60):
+            time.sleep(1)
+            if ok:
+                return
+
+        t = "WARNING:\n\n  initializing an up2k database is taking longer than one minute; something has probably gone wrong:\n\n"
+        self._log_sqlite_incompat(db_path, t)
+
+    def _log_sqlite_incompat(self, db_path, t0) -> None:
+        txt = t0 or ""
+        digest = hashlib.sha512(db_path.encode("utf-8", "replace")).digest()
+        stackname = base64.urlsafe_b64encode(digest[:9]).decode("utf-8")
+        stackpath = os.path.join(E.cfg, "stack-%s.txt" % (stackname,))
+
+        t = "  the filesystem at %s may not support locking, or is otherwise incompatible with sqlite\n\n  %s\n\n"
+        t += "  PS: if you think this is a bug and wish to report it, please include your configuration + the following file: %s\n"
+        txt += t % (db_path, HINT_HISTPATH, stackpath)
+        self.log(txt, 3)
+
+        try:
+            stk = alltrace()
+            with open(stackpath, "wb") as f:
+                f.write(stk.encode("utf-8", "replace"))
+        except Exception as ex:
+            self.log("warning: failed to write %s: %s" % (stackpath, ex), 3)
+
+        if self.args.q:
+            t = "-" * 72
+            raise Exception("%s\n%s\n%s" % (t, txt, t))
+
    def _orz(self, db_path: str) -> "sqlite3.Cursor":
        c = sqlite3.connect(
            db_path, timeout=self.timeout, check_same_thread=False
@@ -2160,7 +2275,7 @@ class Up2k(object):
        cur = self._orz(db_path)
        ver = self._read_ver(cur)
        if not existed and ver is None:
-            return self._create_db(db_path, cur)
+            return self._try_create_db(db_path, cur)

        if ver == 4:
            try:
@@ -2198,8 +2313,16 @@ class Up2k(object):
        db = cur.connection
        cur.close()
        db.close()
-        bos.unlink(db_path)
-        return self._create_db(db_path, None)
+        self._delete_db(db_path)
+        return self._try_create_db(db_path, None)
+
+    def _delete_db(self, db_path: str):
+        for suf in ("", "-shm", "-wal", "-journal"):
+            try:
+                bos.unlink(db_path + suf)
+            except:
+                if not suf:
+                    raise

    def _backup_db(
        self, db_path: str, cur: "sqlite3.Cursor", ver: Optional[int], msg: str
@@ -2236,6 +2359,18 @@ class Up2k(object):
                return int(rows[0][0])
        return None

+    def _try_create_db(
+        self, db_path: str, cur: Optional["sqlite3.Cursor"]
+    ) -> "sqlite3.Cursor":
+        try:
+            return self._create_db(db_path, cur)
+        except:
+            try:
+                self._delete_db(db_path)
+            except:
+                pass
+            raise
+
    def _create_db(
        self, db_path: str, cur: Optional["sqlite3.Cursor"]
    ) -> "sqlite3.Cursor":
@@ -2579,12 +2714,13 @@ class Up2k(object):
                            raise Pebkac(403, t)

                        if not self.args.nw:
+                            dvf: dict[str, Any] = vfs.flags
                            try:
                                dvf = self.flags[job["ptop"]]
                                self._symlink(src, dst, dvf, lmod=cj["lmod"], rm=True)
                            except:
                                if bos.path.exists(dst):
-                                    bos.unlink(dst)
+                                    wunlink(self.log, dst, dvf)
                                if not n4g:
                                    raise

@@ -2593,6 +2729,9 @@ class Up2k(object):
                            a = [job[x] for x in zs.split()]
                            self.db_add(cur, vfs.flags, *a)
                            cur.connection.commit()
+                elif wark in reg:
+                    # checks out, but client may have hopped IPs
+                    job["addr"] = cj["addr"]

            if not job:
                ap1 = djoin(cj["ptop"], cj["prel"])
@@ -2681,6 +2820,28 @@ class Up2k(object):
                fk = self.gen_fk(alg, self.args.fk_salt, ap, job["size"], ino)
                ret["fk"] = fk[: vfs.flags["fk"]]

+            if (
+                not ret["hash"]
+                and cur
+                and cj.get("umod")
+                and int(cj["lmod"]) != int(job["lmod"])
+                and not self.args.nw
+                and cj["user"] in vfs.axs.uwrite
+                and cj["user"] in vfs.axs.udel
+            ):
+                sql = "update up set mt=? where substr(w,1,16)=? and +rd=? and +fn=?"
+                try:
+                    cur.execute(sql, (cj["lmod"], wark[:16], job["prel"], job["name"]))
+                    cur.connection.commit()
+
+                    ap = djoin(job["ptop"], job["prel"], job["name"])
+                    times = (int(time.time()), int(cj["lmod"]))
+                    bos.utime(ap, times, False)
+
+                    self.log("touched %s from %d to %d" % (ap, job["lmod"], cj["lmod"]))
+                except Exception as ex:
+                    self.log("umod failed, %r" % (ex,), 3)
+
            return ret

    def _untaken(self, fdir: str, job: dict[str, Any], ts: float) -> str:
@@ -2693,7 +2854,7 @@ class Up2k(object):
        fp = djoin(fdir, fname)
        if job.get("replace") and bos.path.exists(fp):
            self.log("replacing existing file at {}".format(fp))
-            bos.unlink(fp)
+            wunlink(self.log, fp, self.flags.get(job["ptop"]) or {})

        if self.args.plain_ip:
            dip = ip.replace(":", ".")
@@ -2751,7 +2912,7 @@ class Up2k(object):
                ldst = ldst.replace("/", "\\")

            if rm and bos.path.exists(dst):
-                bos.unlink(dst)
+                wunlink(self.log, dst, flags)

            try:
                if "hardlink" in flags:
@@ -2767,7 +2928,7 @@ class Up2k(object):
                    Path(ldst).symlink_to(lsrc)
                    if not bos.path.exists(dst):
                        try:
-                            bos.unlink(dst)
+                            wunlink(self.log, dst, flags)
                        except:
                            pass
                        t = "the created symlink [%s] did not resolve to [%s]"
@@ -3004,7 +3165,7 @@ class Up2k(object):
            raise

        if "e2t" in self.flags[ptop]:
-            self.tagq.put((ptop, wark, rd, fn, ip, at))
+            self.tagq.put((ptop, wark, rd, fn, sz, ip, at))
            self.n_tagq += 1

        return True
@@ -3070,7 +3231,7 @@ class Up2k(object):
        ):
            t = "upload blocked by xau server config"
            self.log(t, 1)
-            bos.unlink(dst)
+            wunlink(self.log, dst, vflags)
            self.registry[ptop].pop(wark, None)
            raise Pebkac(403, t)

@@ -3107,7 +3268,13 @@ class Up2k(object):
                pass

    def handle_rm(
-        self, uname: str, ip: str, vpaths: list[str], lim: list[int], rm_up: bool
+        self,
+        uname: str,
+        ip: str,
+        vpaths: list[str],
+        lim: list[int],
+        rm_up: bool,
+        unpost: bool,
    ) -> str:
        n_files = 0
        ok = {}
@@ -3117,7 +3284,7 @@ class Up2k(object):
                self.log("hit delete limit of {} files".format(lim[1]), 3)
                break

-            a, b, c = self._handle_rm(uname, ip, vp, lim, rm_up)
+            a, b, c = self._handle_rm(uname, ip, vp, lim, rm_up, unpost)
            n_files += a
            for k in b:
                ok[k] = 1
@@ -3131,25 +3298,43 @@ class Up2k(object):
        return "deleted {} files (and {}/{} folders)".format(n_files, iok, iok + ing)

    def _handle_rm(
-        self, uname: str, ip: str, vpath: str, lim: list[int], rm_up: bool
+        self, uname: str, ip: str, vpath: str, lim: list[int], rm_up: bool, unpost: bool
    ) -> tuple[int, list[str], list[str]]:
        self.db_act = time.time()
-        try:
+        partial = ""
+        if not unpost:
            permsets = [[True, False, False, True]]
            vn, rem = self.asrv.vfs.get(vpath, uname, *permsets[0])
            vn, rem = vn.get_dbv(rem)
-            unpost = False
-        except:
+        else:
            # unpost with missing permissions? verify with db
-            if not self.args.unpost:
-                raise Pebkac(400, "the unpost feature is disabled in server config")
-
-            unpost = True
            permsets = [[False, True]]
            vn, rem = self.asrv.vfs.get(vpath, uname, *permsets[0])
            vn, rem = vn.get_dbv(rem)
+            ptop = vn.realpath
            with self.mutex:
-                _, _, _, _, dip, dat = self._find_from_vpath(vn.realpath, rem)
+                abrt_cfg = self.flags.get(ptop, {}).get("u2abort", 1)
+                addr = (ip or "\n") if abrt_cfg in (1, 2) else ""
+                user = (uname or "\n") if abrt_cfg in (1, 3) else ""
+                reg = self.registry.get(ptop, {}) if abrt_cfg else {}
+                for wark, job in reg.items():
+                    if (user and user != job["user"]) or (addr and addr != job["addr"]):
+                        continue
+                    if djoin(job["prel"], job["name"]) == rem:
+                        if job["ptop"] != ptop:
+                            t = "job.ptop [%s] != vol.ptop [%s] ??"
+                            raise Exception(t % (job["ptop"] != ptop))
+                        partial = vn.canonical(vjoin(job["prel"], job["tnam"]))
+                        break
+                if partial:
+                    dip = ip
+                    dat = time.time()
+                else:
+                    if not self.args.unpost:
+                        t = "the unpost feature is disabled in server config"
+                        raise Pebkac(400, t)
+
+                    _, _, _, _, dip, dat = self._find_from_vpath(ptop, rem)

            t = "you cannot delete this: "
            if not dip:
@@ -3241,7 +3426,10 @@ class Up2k(object):
                        if cur:
                            cur.connection.commit()

-                bos.unlink(abspath)
+                wunlink(self.log, abspath, dbv.flags)
+                if partial:
+                    wunlink(self.log, partial, dbv.flags)
+                    partial = ""
                if xad:
                    runhook(
                        self.log,
@@ -3396,7 +3584,7 @@ class Up2k(object):
            t = "moving symlink from [{}] to [{}], target [{}]"
            self.log(t.format(sabs, dabs, dlabs))
            mt = bos.path.getmtime(sabs, False)
-            bos.unlink(sabs)
+            wunlink(self.log, sabs, svn.flags)
            self._symlink(dlabs, dabs, dvn.flags, False, lmod=mt)

            # folders are too scary, schedule rescan of both vols
@@ -3463,7 +3651,7 @@ class Up2k(object):
                dlink = os.path.join(os.path.dirname(sabs), dlink)
                dlink = bos.path.abspath(dlink)
                self._symlink(dlink, dabs, dvn.flags, lmod=ftime)
-                bos.unlink(sabs)
+                wunlink(self.log, sabs, svn.flags)
            else:
                atomic_move(sabs, dabs)

@@ -3478,7 +3666,7 @@ class Up2k(object):
                shutil.copy2(b1, b2)
            except:
                try:
-                    os.unlink(b2)
+                    wunlink(self.log, dabs, dvn.flags)
                except:
                    pass

@@ -3490,7 +3678,7 @@ class Up2k(object):
                    zb = os.readlink(b1)
                    os.symlink(zb, b2)
                except:
-                    os.unlink(b2)
+                    wunlink(self.log, dabs, dvn.flags)
                    raise

            if is_link:
@@ -3500,7 +3688,7 @@ class Up2k(object):
                except:
                    pass

-            os.unlink(b1)
+            wunlink(self.log, sabs, svn.flags)

        if xar:
            runhook(self.log, xar, dabs, dvp, "", uname, 0, 0, "", 0, "")
@@ -3586,9 +3774,10 @@ class Up2k(object):
            )
            job = reg.get(wark) if wark else None
            if job:
-                t = "forgetting partial upload {} ({})"
-                p = self._vis_job_progress(job)
-                self.log(t.format(wark, p))
+                if job["need"]:
+                    t = "forgetting partial upload {} ({})"
+                    p = self._vis_job_progress(job)
+                    self.log(t.format(wark, p))
                assert wark
                del reg[wark]

@@ -3640,10 +3829,11 @@ class Up2k(object):
            ptop, rem = links.pop(slabs)
            self.log("linkswap [{}] and [{}]".format(sabs, slabs))
            mt = bos.path.getmtime(slabs, False)
-            bos.unlink(slabs)
+            flags = self.flags.get(ptop) or {}
+            wunlink(self.log, slabs, flags)
            bos.rename(sabs, slabs)
            bos.utime(slabs, (int(time.time()), int(mt)), False)
-            self._symlink(slabs, sabs, self.flags.get(ptop) or {}, False)
+            self._symlink(slabs, sabs, flags, False)
            full[slabs] = (ptop, rem)
            sabs = slabs

@@ -3689,13 +3879,13 @@ class Up2k(object):
                self.log(t % (ex, ex), 3)

            self.log("relinking [%s] to [%s]" % (alink, dabs))
+            flags = self.flags.get(parts[0]) or {}
            try:
                lmod = bos.path.getmtime(alink, False)
-                bos.unlink(alink)
+                wunlink(self.log, alink, flags)
            except:
                pass

-            flags = self.flags.get(parts[0]) or {}
            self._symlink(dabs, alink, flags, False, lmod=lmod or 0)

        return len(full) + len(links)
@@ -3764,8 +3954,14 @@ class Up2k(object):

    def _new_upload(self, job: dict[str, Any]) -> None:
        pdir = djoin(job["ptop"], job["prel"])
-        if not job["size"] and bos.path.isfile(djoin(pdir, job["name"])):
-            return
+        if not job["size"]:
+            try:
+                inf = bos.stat(djoin(pdir, job["name"]))
+                if stat.S_ISREG(inf.st_mode):
+                    job["lmod"] = inf.st_size
+                    return
+            except:
+                pass

        self.registry[job["ptop"]][job["wark"]] = job
        job["name"] = self._untaken(pdir, job, job["t0"])
@@ -3829,7 +4025,13 @@ class Up2k(object):

            if not ANYWIN and sprs and sz > 1024 * 1024:
                fs = self.fstab.get(pdir)
-                if fs != "ok":
+                if fs == "ok":
+                    pass
+                elif "sparse" in self.flags[job["ptop"]]:
+                    t = "volflag 'sparse' is forcing use of sparse files for uploads to [%s]"
+                    self.log(t % (job["ptop"],))
+                    relabel = True
+                else:
                    relabel = True
                    f.seek(1024 * 1024 - 1)
                    f.write(b"e")
@@ -3954,14 +4156,14 @@ class Up2k(object):
            with self.mutex:
                self.n_tagq -= 1

-            ptop, wark, rd, fn, ip, at = self.tagq.get()
+            ptop, wark, rd, fn, sz, ip, at = self.tagq.get()
            if "e2t" not in self.flags[ptop]:
                continue

            # self.log("\n  " + repr([ptop, rd, fn]))
            abspath = djoin(ptop, rd, fn)
            try:
-                tags = self.mtag.get(abspath)
+                tags = self.mtag.get(abspath) if sz else {}
                ntags1 = len(tags)
                parsers = self._get_parsers(ptop, tags, abspath)
                if self.args.mtag_vv:
--- a/copyparty/util.py
+++ b/copyparty/util.py
@@ -1,6 +1,7 @@
 # coding: utf-8
 from __future__ import print_function, unicode_literals

+import argparse
 import base64
 import contextlib
 import errno
@@ -167,6 +168,12 @@ except:
        return struct.unpack(fmt.decode("ascii"), a)


+try:
+    BITNESS = struct.calcsize(b"P") * 8
+except:
+    BITNESS = struct.calcsize("P") * 8
+
+
 ansi_re = re.compile("\033\\[[^mK]*[mK]")


@@ -179,7 +186,7 @@ else:

 SYMTIME = sys.version_info > (3, 6) and os.utime in os.supports_follow_symlinks

-META_NOBOTS = '<meta name="robots" content="noindex, nofollow">'
+META_NOBOTS = '<meta name="robots" content="noindex, nofollow">\n'

 FFMPEG_URL = "https://www.gyan.dev/ffmpeg/builds/ffmpeg-git-full.7z"

@@ -343,6 +350,11 @@ CMD_EXEB = set(_exestr.encode("utf-8").split())
 CMD_EXES = set(_exestr.split())


+# mostly from https://github.com/github/gitignore/blob/main/Global/macOS.gitignore
+APPLESAN_TXT = r"/(__MACOS|Icon\r\r)|/\.(_|DS_Store|AppleDouble|LSOverride|DocumentRevisions-|fseventsd|Spotlight-|TemporaryItems|Trashes|VolumeIcon\.icns|com\.apple\.timemachine\.donotpresent|AppleDB|AppleDesktop|apdisk)"
+APPLESAN_RE = re.compile(APPLESAN_TXT)
+
+
 pybin = sys.executable or ""
 if EXE:
    pybin = ""
@@ -366,11 +378,6 @@ def py_desc() -> str:
    if ofs > 0:
        py_ver = py_ver[:ofs]

-    try:
-        bitness = struct.calcsize(b"P") * 8
-    except:
-        bitness = struct.calcsize("P") * 8
-
    host_os = platform.system()
    compiler = platform.python_compiler().split("http")[0]

@@ -378,7 +385,7 @@ def py_desc() -> str:
    os_ver = m.group(1) if m else ""

    return "{:>9} v{} on {}{} {} [{}]".format(
-        interp, py_ver, host_os, bitness, os_ver, compiler
+        interp, py_ver, host_os, BITNESS, os_ver, compiler
    )


@@ -416,14 +423,32 @@ try:
 except:
    PYFTPD_VER = "(None)"

+try:
+    from partftpy.__init__ import __version__ as PARTFTPY_VER
+except:
+    PARTFTPY_VER = "(None)"

-VERSIONS = "copyparty v{} ({})\n{}\n   sqlite v{} | jinja v{} | pyftpd v{}".format(
-    S_VERSION, S_BUILD_DT, py_desc(), SQLITE_VER, JINJA_VER, PYFTPD_VER
+
+PY_DESC = py_desc()
+
+VERSIONS = (
+    "copyparty v{} ({})\n{}\n   sqlite {} | jinja {} | pyftpd {} | tftp {}".format(
+        S_VERSION, S_BUILD_DT, PY_DESC, SQLITE_VER, JINJA_VER, PYFTPD_VER, PARTFTPY_VER
+    )
 )


-_: Any = (mp, BytesIO, quote, unquote, SQLITE_VER, JINJA_VER, PYFTPD_VER)
-__all__ = ["mp", "BytesIO", "quote", "unquote", "SQLITE_VER", "JINJA_VER", "PYFTPD_VER"]
+_: Any = (mp, BytesIO, quote, unquote, SQLITE_VER, JINJA_VER, PYFTPD_VER, PARTFTPY_VER)
+__all__ = [
+    "mp",
+    "BytesIO",
+    "quote",
+    "unquote",
+    "SQLITE_VER",
+    "JINJA_VER",
+    "PYFTPD_VER",
+    "PARTFTPY_VER",
+]


 class Daemon(threading.Thread):
@@ -527,25 +552,33 @@ class HLog(logging.Handler):
        elif record.name.startswith("impacket"):
            if self.ptn_smb_ign.match(msg):
                return
+        elif record.name.startswith("partftpy."):
+            record.name = record.name[9:]

        self.log_func(record.name[-21:], msg, c)


 class NetMap(object):
-    def __init__(self, ips: list[str], netdevs: dict[str, Netdev]) -> None:
+    def __init__(self, ips: list[str], cidrs: list[str], keep_lo=False) -> None:
+        """
+        ips: list of plain ipv4/ipv6 IPs, not cidr
+        cidrs: list of cidr-notation IPs (ip/prefix)
+        """
        if "::" in ips:
            ips = [x for x in ips if x != "::"] + list(
-                [x.split("/")[0] for x in netdevs if ":" in x]
+                [x.split("/")[0] for x in cidrs if ":" in x]
            )
            ips.append("0.0.0.0")

        if "0.0.0.0" in ips:
            ips = [x for x in ips if x != "0.0.0.0"] + list(
-                [x.split("/")[0] for x in netdevs if ":" not in x]
+                [x.split("/")[0] for x in cidrs if ":" not in x]
            )

-        ips = [x for x in ips if x not in ("::1", "127.0.0.1")]
-        ips = find_prefix(ips, netdevs)
+        if not keep_lo:
+            ips = [x for x in ips if x not in ("::1", "127.0.0.1")]
+
+        ips = find_prefix(ips, cidrs)

        self.cache: dict[str, str] = {}
        self.b2sip: dict[bytes, str] = {}
@@ -562,6 +595,9 @@ class NetMap(object):
        self.bip.sort(reverse=True)

    def map(self, ip: str) -> str:
+        if ip.startswith("::ffff:"):
+            ip = ip[7:]
+
        try:
            return self.cache[ip]
        except:
@@ -780,16 +816,20 @@ class ProgressPrinter(threading.Thread):
    periodically print progress info without linefeeds
    """

-    def __init__(self) -> None:
+    def __init__(self, log: "NamedLogger", args: argparse.Namespace) -> None:
        threading.Thread.__init__(self, name="pp")
        self.daemon = True
+        self.log = log
+        self.args = args
        self.msg = ""
        self.end = False
        self.n = -1
        self.start()

    def run(self) -> None:
+        tp = 0
        msg = None
+        no_stdout = self.args.q
        fmt = " {}\033[K\r" if VT100 else " {} $\r"
        while not self.end:
            time.sleep(0.1)
@@ -797,10 +837,21 @@ class ProgressPrinter(threading.Thread):
                continue

            msg = self.msg
+            now = time.time()
+            if msg and now - tp > 10:
+                tp = now
+                self.log("progress: %s" % (msg,), 6)
+
+            if no_stdout:
+                continue
+
            uprint(fmt.format(msg))
            if PY2:
                sys.stdout.flush()

+        if no_stdout:
+            return
+
        if VT100:
            print("\033[K", end="")
        elif msg:
@@ -1221,12 +1272,20 @@ def log_thrs(log: Callable[[str, str, int], None], ival: float, name: str) -> No


 def vol_san(vols: list["VFS"], txt: bytes) -> bytes:
+    txt0 = txt
    for vol in vols:
-        txt = txt.replace(vol.realpath.encode("utf-8"), vol.vpath.encode("utf-8"))
-        txt = txt.replace(
-            vol.realpath.encode("utf-8").replace(b"\\", b"\\\\"),
-            vol.vpath.encode("utf-8"),
-        )
+        bap = vol.realpath.encode("utf-8")
+        bhp = vol.histpath.encode("utf-8")
+        bvp = vol.vpath.encode("utf-8")
+        bvph = b"$hist(/" + bvp + b")"
+
+        txt = txt.replace(bap, bvp)
+        txt = txt.replace(bhp, bvph)
+        txt = txt.replace(bap.replace(b"\\", b"\\\\"), bvp)
+        txt = txt.replace(bhp.replace(b"\\", b"\\\\"), bvph)
+
+    if txt != txt0:
+        txt += b"\r\nNOTE: filepaths sanitized; see serverlog for correct values"

    return txt

@@ -1718,7 +1777,7 @@ def get_spd(nbyte: int, t0: float, t: Optional[float] = None) -> str:
    if t is None:
        t = time.time()

-    bps = nbyte / ((t - t0) + 0.001)
+    bps = nbyte / ((t - t0) or 0.001)
    s1 = humansize(nbyte).replace(" ", "\033[33m").replace("iB", "")
    s2 = humansize(bps).replace(" ", "\033[35m").replace("iB", "")
    return "%s \033[0m%s/s\033[0m" % (s1, s2)
@@ -1870,10 +1929,10 @@ def ipnorm(ip: str) -> str:
    return ip


-def find_prefix(ips: list[str], netdevs: dict[str, Netdev]) -> list[str]:
+def find_prefix(ips: list[str], cidrs: list[str]) -> list[str]:
    ret = []
    for ip in ips:
-        hit = next((x for x in netdevs if x.startswith(ip + "/")), None)
+        hit = next((x for x in cidrs if x.startswith(ip + "/") or ip == x), None)
        if hit:
            ret.append(hit)
    return ret
@@ -2073,6 +2132,47 @@ def atomic_move(usrc: str, udst: str) -> None:
        os.rename(src, dst)


+def wunlink(log: "NamedLogger", abspath: str, flags: dict[str, Any]) -> bool:
+    maxtime = flags.get("rm_re_t", 0.0)
+    bpath = fsenc(abspath)
+    if not maxtime:
+        os.unlink(bpath)
+        return True
+
+    chill = flags.get("rm_re_r", 0.0)
+    if chill < 0.001:
+        chill = 0.1
+
+    ino = 0
+    t0 = now = time.time()
+    for attempt in range(90210):
+        try:
+            if ino and os.stat(bpath).st_ino != ino:
+                log("inode changed; aborting delete")
+                return False
+            os.unlink(bpath)
+            if attempt:
+                now = time.time()
+                t = "deleted in %.2f sec, attempt %d"
+                log(t % (now - t0, attempt + 1))
+            return True
+        except OSError as ex:
+            now = time.time()
+            if ex.errno == errno.ENOENT:
+                return False
+            if now - t0 > maxtime or attempt == 90209:
+                raise
+            if not attempt:
+                if not PY2:
+                    ino = os.stat(bpath).st_ino
+                t = "delete failed (err.%d); retrying for %d sec: %s"
+                log(t % (ex.errno, maxtime + 0.99, abspath))
+
+        time.sleep(chill)
+
+    return False  # makes pylance happy
+
+
 def get_df(abspath: str) -> tuple[Optional[int], Optional[int]]:
    try:
        # some fuses misbehave
@@ -2226,6 +2326,41 @@ def list_ips() -> list[str]:
    return list(ret)


+def build_netmap(csv: str):
+    csv = csv.lower().strip()
+
+    if csv in ("any", "all", "no", ",", ""):
+        return None
+
+    if csv in ("lan", "local", "private", "prvt"):
+        csv = "10.0.0.0/8, 172.16.0.0/12, 192.168.0.0/16, fd00::/8"  # lan
+        csv += ", 169.254.0.0/16, fe80::/10"  # link-local
+        csv += ", 127.0.0.0/8, ::1/128"  # loopback
+
+    srcs = [x.strip() for x in csv.split(",") if x.strip()]
+    cidrs = []
+    for zs in srcs:
+        if not zs.endswith("."):
+            cidrs.append(zs)
+            continue
+
+        # translate old syntax "172.19." => "172.19.0.0/16"
+        words = len(zs.rstrip(".").split("."))
+        if words == 1:
+            zs += "0.0.0/8"
+        elif words == 2:
+            zs += "0.0/16"
+        elif words == 3:
+            zs += "0/24"
+        else:
+            raise Exception("invalid config value [%s]" % (zs,))
+
+        cidrs.append(zs)
+
+    ips = [x.split("/")[0] for x in cidrs]
+    return NetMap(ips, cidrs, True)
+
+
 def yieldfile(fn: str) -> Generator[bytes, None, None]:
    with open(fsenc(fn), "rb", 512 * 1024) as f:
        while True:
--- a/copyparty/web/baguettebox.js
+++ b/copyparty/web/baguettebox.js
@@ -17,8 +17,10 @@ window.baguetteBox = (function () {
            titleTag: false,
            async: false,
            preload: 2,
+            refocus: true,
            afterShow: null,
            afterHide: null,
+            duringHide: null,
            onChange: null,
        },
        overlay, slider, btnPrev, btnNext, btnHelp, btnAnim, btnRotL, btnRotR, btnSel, btnFull, btnVmode, btnClose,
@@ -144,7 +146,7 @@ window.baguetteBox = (function () {
            selectorData.galleries.push(gallery);
        });

-        return selectorData.galleries;
+        return [selectorData.galleries, options];
    }

    function clearCachedData() {
@@ -255,19 +257,19 @@ window.baguetteBox = (function () {
        if (anymod(e, true))
            return;

-        var k = e.code + '', v = vid(), pos = -1;
+        var k = (e.code || e.key) + '', v = vid(), pos = -1;

        if (k == "BracketLeft")
            setloop(1);
        else if (k == "BracketRight")
            setloop(2);
-        else if (e.shiftKey && k != 'KeyR')
+        else if (e.shiftKey && k != "KeyR" && k != "R")
            return;
-        else if (k == "ArrowLeft" || k == "KeyJ")
+        else if (k == "ArrowLeft" || k == "KeyJ" || k == "Left" || k == "j")
            showPreviousImage();
-        else if (k == "ArrowRight" || k == "KeyL")
+        else if (k == "ArrowRight" || k == "KeyL" || k == "Right" || k == "l")
            showNextImage();
-        else if (k == "Escape")
+        else if (k == "Escape" || k == "Esc")
            hideOverlay();
        else if (k == "Home")
            showFirstImage(e);
@@ -295,9 +297,9 @@ window.baguetteBox = (function () {
        }
        else if (k == "KeyF")
            tglfull();
-        else if (k == "KeyS")
+        else if (k == "KeyS" || k == "s")
            tglsel();
-        else if (k == "KeyR")
+        else if (k == "KeyR" || k == "r" || k == "R")
            rotn(e.shiftKey ? -1 : 1);
        else if (k == "KeyY")
            dlpic();
@@ -593,6 +595,9 @@ window.baguetteBox = (function () {
        if (overlay.style.display === 'none')
            return;

+        if (options.duringHide)
+            options.duringHide();
+
        sethash('');
        unbindEvents();
        try {
@@ -613,9 +618,45 @@ window.baguetteBox = (function () {
            if (options.afterHide)
                options.afterHide();

-            documentLastFocus && documentLastFocus.focus();
+            options.refocus && documentLastFocus && documentLastFocus.focus();
            isOverlayVisible = false;
-        }, 500);
+            unvid();
+            unfig();
+        }, 250);
+    }
+
+    function unvid(keep) {
+        var vids = QSA('#bbox-overlay video');
+        for (var a = vids.length - 1; a >= 0; a--) {
+            var v = vids[a];
+            if (v == keep)
+                continue;
+
+            v.src = '';
+            v.load();
+
+            var p = v.parentNode;
+            p.removeChild(v);
+            p.parentNode.removeChild(p);
+        }
+    }
+
+    function unfig(keep) {
+        var figs = QSA('#bbox-overlay figure'),
+            npre = options.preload || 0,
+            k = [];
+
+        if (keep === undefined)
+            keep = -9;
+
+        for (var a = keep - npre; a <= keep + npre; a++)
+            k.push('bbox-figure-' + a);
+
+        for (var a = figs.length - 1; a >= 0; a--) {
+            var f = figs[a];
+            if (!has(k, f.getAttribute('id')))
+                f.parentNode.removeChild(f);
+        }
    }

    function loadImage(index, callback) {
@@ -708,6 +749,7 @@ window.baguetteBox = (function () {
    }

    function show(index, gallery) {
+        gallery = gallery || currentGallery;
        if (!isOverlayVisible && index >= 0 && index < gallery.length) {
            prepareOverlay(gallery, options);
            showOverlay(index);
@@ -720,12 +762,10 @@ window.baguetteBox = (function () {
        if (index >= imagesElements.length)
            return bounceAnimation('right');

-        var v = vid();
-        if (v) {
-            v.src = '';
-            v.load();
-            v.parentNode.removeChild(v);
+        try {
+            vid().pause();
        }
+        catch (ex) { }

        currentIndex = index;
        loadImage(currentIndex, function () {
@@ -734,6 +774,15 @@ window.baguetteBox = (function () {
        });
        updateOffset();

+        if (options.animation == 'none')
+            unvid(vid());
+        else
+            setTimeout(function () {
+                unvid(vid());
+            }, 100);
+
+        unfig(index);
+
        if (options.onChange)
            options.onChange(currentIndex, imagesElements.length);

--- a/copyparty/web/browser.css
+++ b/copyparty/web/browser.css
@@ -494,6 +494,7 @@ html.dz {

 	text-shadow: none;
 	font-family: 'scp', monospace, monospace;
+	font-family: var(--font-mono), 'scp', monospace, monospace;
 }
 html.dy {
 	--fg: #000;
@@ -603,6 +604,7 @@ html {
 	color: var(--fg);
 	background: var(--bgg);
 	font-family: sans-serif;
+	font-family: var(--font-main), sans-serif;
 	text-shadow: 1px 1px 0px var(--bg-max);
 }
 html, body {
@@ -611,6 +613,7 @@ html, body {
 }
 pre, code, tt, #doc, #doc>code {
 	font-family: 'scp', monospace, monospace;
+	font-family: var(--font-mono), 'scp', monospace, monospace;
 }
 .ayjump {
 	position: fixed;
@@ -759,6 +762,7 @@ html #files.hhpick thead th {
 }
 #files tbody td:nth-child(3) {
 	font-family: 'scp', monospace, monospace;
+	font-family: var(--font-mono), 'scp', monospace, monospace;
 	text-align: right;
 	padding-right: 1em;
 	white-space: nowrap;
@@ -818,6 +822,11 @@ html.y #path a:hover {
 .logue:empty {
 	display: none;
 }
+.logue.raw {
+	white-space: pre;
+	font-family: 'scp', 'consolas', monospace;
+	font-family: var(--font-mono), 'scp', 'consolas', monospace;
+}
 #doc>iframe,
 .logue>iframe {
 	background: var(--bgg);
@@ -981,6 +990,10 @@ html.y #path a:hover {
 	margin: 0 auto;
 	display: block;
 }
+#ggrid.nocrop>a img {
+	max-height: 20em;
+	max-height: calc(var(--grid-sz)*2);
+}
 #ggrid>a.dir:before {
 	content: '📂';
 }
@@ -1147,9 +1160,6 @@ html.y #widget.open {
@keyframes spin {
 	100% {transform: rotate(360deg)}
 }
-@media (prefers-reduced-motion) {
-	@keyframes spin { }
-}
@keyframes fadein {
 	0% {opacity: 0}
 	100% {opacity: 1}
@@ -1243,6 +1253,13 @@ html.y #widget.open {
 	0% {opacity:0}
 	100% {opacity:1}
 }
+#ggrid>a.glow {
+	animation: gexit .6s ease-out;
+}
+@keyframes gexit {
+	0% {box-shadow: 0 0 0 2em var(--a)}
+	100% {box-shadow: 0 0 0em 0em var(--a)}
+}
 #wzip a {
 	font-size: .4em;
 	margin: -.3em .1em;
@@ -1405,6 +1422,7 @@ input[type="checkbox"]:checked+label {
 }
 html.dz input {
 	font-family: 'scp', monospace, monospace;
+	font-family: var(--font-mono), 'scp', monospace, monospace;
 }
 .opwide div>span>input+label {
 	padding: .3em 0 .3em .3em;
@@ -1653,7 +1671,9 @@ html.cz .tgl.btn.on {
 	color: var(--fg-max);
 }
 #tree ul a.hl {
+	color: #fff;
 	color: var(--btn-1-fg);
+	background: #000;
 	background: var(--btn-1-bg);
 	text-shadow: none;
 }
@@ -1688,6 +1708,7 @@ html.y #tree.nowrap .ntree a+a:hover {
 }
 .ntree a:first-child {
 	font-family: 'scp', monospace, monospace;
+	font-family: var(--font-mono), 'scp', monospace, monospace;
 	font-size: 1.2em;
 	line-height: 0;
 }
@@ -1769,6 +1790,7 @@ html.y #tree.nowrap .ntree a+a:hover {
 	padding: 0;
 }
 #thumbs,
+#au_prescan,
 #au_fullpre,
 #au_os_seek,
 #au_osd_cv,
@@ -1776,7 +1798,8 @@ html.y #tree.nowrap .ntree a+a:hover {
 	opacity: .3;
 }
 #griden.on+#thumbs,
-#au_preload.on+#au_fullpre,
+#au_preload.on+#au_prescan,
+#au_preload.on+#au_prescan+#au_fullpre,
 #au_os_ctl.on+#au_os_seek,
 #au_os_ctl.on+#au_os_seek+#au_osd_cv,
 #u2turbo.on+#u2tdate {
@@ -1816,6 +1839,10 @@ html.y #tree.nowrap .ntree a+a:hover {
 	margin: 0;
 	padding: 0;
 }
+#unpost td:nth-child(3),
+#unpost td:nth-child(4) {
+	text-align: right;
+}
 #rui {
 	background: #fff;
 	background: var(--bg);
@@ -1843,6 +1870,7 @@ html.y #tree.nowrap .ntree a+a:hover {
 }
 #rn_vadv input {
 	font-family: 'scp', monospace, monospace;
+	font-family: var(--font-mono), 'scp', monospace, monospace;
 }
 #rui td+td,
 #rui td input[type="text"] {
@@ -1906,6 +1934,7 @@ html.y #doc {
 #doc.mdo {
 	white-space: normal;
 	font-family: sans-serif;
+	font-family: var(--font-main), sans-serif;
 }
 #doc.prism * {
 	line-height: 1.5em;
@@ -1965,6 +1994,7 @@ a.btn,
 }
 #hkhelp td:first-child {
 	font-family: 'scp', monospace, monospace;
+	font-family: var(--font-mono), 'scp', monospace, monospace;
 }
 html.noscroll,
 html.noscroll .sbar {
@@ -2174,6 +2204,7 @@ html.y #bbox-overlay figcaption a {
 }
 #bbox-halp {
 	color: var(--fg-max);
+	background: #fff;
 	background: var(--bg);
 	position: absolute;
 	top: 0;
@@ -2473,6 +2504,7 @@ html.y #bbox-overlay figcaption a {
 }
 #op_up2k.srch td.prog {
 	font-family: sans-serif;
+	font-family: var(--font-main), sans-serif;
 	font-size: 1em;
 	width: auto;
 }
@@ -2487,6 +2519,7 @@ html.y #bbox-overlay figcaption a {
 	white-space: nowrap;
 	display: inline-block;
 	font-family: 'scp', monospace, monospace;
+	font-family: var(--font-mono), 'scp', monospace, monospace;
 }
 #u2etas.o {
 	width: 20em;
@@ -2556,6 +2589,7 @@ html.y #bbox-overlay figcaption a {
 #u2cards span {
 	color: var(--fg-max);
 	font-family: 'scp', monospace;
+	font-family: var(--font-mono), 'scp', monospace;
 }
 #u2cards > a:nth-child(4) > span {
 	display: inline-block;
@@ -2721,6 +2755,7 @@ html.b #u2conf a.b:hover {
 }
 .prog {
 	font-family: 'scp', monospace, monospace;
+	font-family: var(--font-mono), 'scp', monospace, monospace;
 }
 #u2tab span.inf,
 #u2tab span.ok,
@@ -3129,7 +3164,7 @@ html.d #treepar {
 		margin-top: 1.7em;
 	}
 }
-@supports (display: grid) {
+@supports (display: grid) and (gap: 1em) {
 	#ggrid {
 		display: grid;
 		margin: 0em 0.25em;
@@ -3154,3 +3189,24 @@ html.d #treepar {
 		padding: 0.2em;
 	}
 }
+
+
+
+
+
+@media (prefers-reduced-motion) {
+	@keyframes spin { }
+	@keyframes gexit { }
+	@keyframes bounce { }
+	@keyframes bounceFromLeft { }
+	@keyframes bounceFromRight { }
+
+	#ggrid>a:before,
+	#widget.anim,
+	#u2tabw,
+	.dropdesc,
+	.dropdesc b,
+	.dropdesc>div>div {
+		transition: none;
+	}
+}
--- a/copyparty/web/browser.html
+++ b/copyparty/web/browser.html
@@ -7,9 +7,9 @@
 	<meta http-equiv="X-UA-Compatible" content="IE=edge">
 	<meta name="viewport" content="width=device-width, initial-scale=0.8, minimum-scale=0.6">
 	<meta name="theme-color" content="#333">
-{{ html_head }}
 	<link rel="stylesheet" media="screen" href="{{ r }}/.cpr/ui.css?_={{ ts }}">
 	<link rel="stylesheet" media="screen" href="{{ r }}/.cpr/browser.css?_={{ ts }}">
+{{ html_head }}
 	{%- if css %}
 	<link rel="stylesheet" media="screen" href="{{ css }}_={{ ts }}">
 	{%- endif %}
@@ -148,7 +148,8 @@
 			logues = {{ logues|tojson if sb_lg else "[]" }},
 			ls0 = {{ ls0|tojson }};

-		document.documentElement.className = localStorage.cpp_thm || dtheme;
+		var STG = window.localStorage;
+		document.documentElement.className = (STG && STG.cpp_thm) || dtheme;
 	</script>
 	<script src="{{ r }}/.cpr/util.js?_={{ ts }}"></script>
 	<script src="{{ r }}/.cpr/baguettebox.js?_={{ ts }}"></script>
@@ -160,3 +161,4 @@
 </body>

 </html>
+
--- a/copyparty/web/browser.js
+++ b/copyparty/web/browser.js
--- a/copyparty/web/browser2.html
+++ b/copyparty/web/browser2.html
@@ -6,12 +6,12 @@
 	<title>{{ title }}</title>
 	<meta http-equiv="X-UA-Compatible" content="IE=edge">
 	<meta name="viewport" content="width=device-width, initial-scale=0.8">
-{{ html_head }}
 	<style>
 		html{font-family:sans-serif}
 		td{border:1px solid #999;border-width:1px 1px 0 0;padding:0 5px}
 		a{display:block}
 	</style>
+{{ html_head }}
 </head>

 <body>
@@ -61,3 +61,4 @@

 </body>
 </html>
+
--- a/copyparty/web/cf.html
+++ b/copyparty/web/cf.html
@@ -25,3 +25,4 @@
 </body>

 </html>
+
--- a/copyparty/web/md.css
+++ b/copyparty/web/md.css
@@ -2,6 +2,7 @@ html, body {
 	color: #333;
 	background: #eee;
 	font-family: sans-serif;
+	font-family: var(--font-main), sans-serif;
 	line-height: 1.5em;
 }
 html.y #helpbox a {
@@ -67,6 +68,7 @@ a {
 	position: relative;
 	display: inline-block;
 	font-family: 'scp', monospace, monospace;
+	font-family: var(--font-mono), 'scp', monospace, monospace;
 	font-weight: bold;
 	font-size: 1.3em;
 	line-height: .1em;
--- a/copyparty/web/md.html
+++ b/copyparty/web/md.html
@@ -4,12 +4,12 @@
 	<meta http-equiv="X-UA-Compatible" content="IE=edge">
 	<meta name="viewport" content="width=device-width, initial-scale=0.7">
 	<meta name="theme-color" content="#333">
-{{ html_head }}
 	<link rel="stylesheet" href="{{ r }}/.cpr/ui.css?_={{ ts }}">
 	<link rel="stylesheet" href="{{ r }}/.cpr/md.css?_={{ ts }}">
 	{%- if edit %}
 	<link rel="stylesheet" href="{{ r }}/.cpr/md2.css?_={{ ts }}">
 	{%- endif %}
+{{ html_head }}
 </head>
 <body>
 	<div id="mn"></div>
@@ -139,16 +139,15 @@ var md_opt = {
 };

 (function () {
-	var l = localStorage,
-		drk = l.light != 1,
+	var l = window.localStorage,
+		drk = (l && l.light) != 1,
 		btn = document.getElementById("lightswitch"),
 		f = function (e) {
 if (e) { e.preventDefault(); drk = !drk; }
 document.documentElement.className = drk? "z":"y";
 btn.innerHTML = "go " + (drk ? "light":"dark");
-l.light = drk? 0:1;
+try { l.light = drk? 0:1; } catch (ex) { }
 		};
-	
 	btn.onclick = f;
 	f();
 })();
@@ -161,3 +160,4 @@ l.light = drk? 0:1;
 	<script src="{{ r }}/.cpr/md2.js?_={{ ts }}"></script>
 	{%- endif %}
 </body></html>
+
--- a/copyparty/web/md.js
+++ b/copyparty/web/md.js
@@ -216,6 +216,11 @@ function convert_markdown(md_text, dest_dom) {
            md_html = DOMPurify.sanitize(md_html);
    }
    catch (ex) {
+        if (IE) {
+            dest_dom.innerHTML = 'IE cannot into markdown ;_;';
+            return;
+        }
+
        if (ext)
            md_plug_err(ex, ext[1]);

@@ -507,13 +512,6 @@ dom_navtgl.onclick = function () {
    redraw();
 };

-if (!HTTPS && location.hostname != '127.0.0.1') try {
-    ebi('edit2').onclick = function (e) {
-        toast.err(0, "the fancy editor is only available over https");
-        return ev(e);
-    }
-} catch (ex) { }
-
 if (sread('hidenav') == 1)
    dom_navtgl.onclick();

--- a/copyparty/web/md2.css
+++ b/copyparty/web/md2.css
@@ -9,7 +9,7 @@
 	width: calc(100% - 56em);
 }
 #mw {
-	left: calc(100% - 55em);
+	left: max(0em, calc(100% - 55em));
 	overflow-y: auto;
 	position: fixed;
 	bottom: 0;
@@ -56,6 +56,7 @@
 	padding: 0;
 	margin: 0;
 	font-family: 'scp', monospace, monospace;
+	font-family: var(--font-mono), 'scp', monospace, monospace;
 	white-space: pre-wrap;
 	word-break: break-word;
 	overflow-wrap: break-word;
--- a/copyparty/web/md2.js
+++ b/copyparty/web/md2.js
@@ -163,7 +163,7 @@ redraw = (function () {
    dom_sbs.onclick = setsbs;
    dom_nsbs.onclick = modetoggle;

-    onresize();
+    (IE ? modetoggle : onresize)();
    return onresize;
 })();

@@ -368,14 +368,14 @@ function save(e) {

 function save_cb() {
    if (this.status !== 200)
-        return toast.err(0, 'Error!  The file was NOT saved.\n\n' + this.status + ": " + (this.responseText + '').replace(/^<pre>/, ""));
+        return toast.err(0, 'Error!  The file was NOT saved.\n\nError ' + this.status + ":\n" + unpre(this.responseText));

    var r;
    try {
        r = JSON.parse(this.responseText);
    }
    catch (ex) {
-        return toast.err(0, 'Failed to parse reply from server:\n\n' + this.responseText);
+        return toast.err(0, 'Error!  The file was likely NOT saved.\n\nFailed to parse reply from server:\n\n' + unpre(this.responseText));
    }

    if (!r.ok) {
@@ -418,7 +418,7 @@ function run_savechk(lastmod, txt, btn, ntry) {

 function savechk_cb() {
    if (this.status !== 200)
-        return toast.err(0, 'Error!  The file was NOT saved.\n\n' + this.status + ": " + (this.responseText + '').replace(/^<pre>/, ""));
+        return toast.err(0, 'Error!  The file was NOT saved.\n\nError ' + this.status + ":\n" + unpre(this.responseText));

    var doc1 = this.txt.replace(/\r\n/g, "\n");
    var doc2 = this.responseText.replace(/\r\n/g, "\n");
@@ -933,7 +933,7 @@ var set_lno = (function () {
    var keydown = function (ev) {
        if (!ev && window.event) {
            ev = window.event;
-            if (localStorage.dev_fbw == 1) {
+            if (dev_fbw == 1) {
                toast.warn(10, 'hello from fallback code ;_;\ncheck console trace');
                console.error('using window.event');
            }
@@ -1009,7 +1009,7 @@ var set_lno = (function () {
                md_home(ev.shiftKey);
                return false;
            }
-            if (!ev.shiftKey && (ev.code.endsWith("Enter") || kc == 13)) {
+            if (!ev.shiftKey && ((ev.code + '').endsWith("Enter") || kc == 13)) {
                return md_newline();
            }
            if (!ev.shiftKey && kc == 8) {
--- a/copyparty/web/mde.css
+++ b/copyparty/web/mde.css
@@ -17,6 +17,7 @@ html, body {
 	padding: 0;
 	min-height: 100%;
 	font-family: sans-serif;
+	font-family: var(--font-main), sans-serif;
 	background: #f7f7f7;
 	color: #333;
 }
--- a/copyparty/web/mde.html
+++ b/copyparty/web/mde.html
@@ -4,11 +4,11 @@
 	<meta http-equiv="X-UA-Compatible" content="IE=edge">
 	<meta name="viewport" content="width=device-width, initial-scale=0.7">
 	<meta name="theme-color" content="#333">
-{{ html_head }}
 	<link rel="stylesheet" href="{{ r }}/.cpr/ui.css?_={{ ts }}">
 	<link rel="stylesheet" href="{{ r }}/.cpr/mde.css?_={{ ts }}">
 	<link rel="stylesheet" href="{{ r }}/.cpr/deps/mini-fa.css?_={{ ts }}">
 	<link rel="stylesheet" href="{{ r }}/.cpr/deps/easymde.css?_={{ ts }}">
+{{ html_head }}
 </head>
 <body>
 	<div id="mw">
@@ -37,12 +37,12 @@ var md_opt = {
 };

 var lightswitch = (function () {
-	var l = localStorage,
-		drk = l.light != 1,
+	var l = window.localStorage,
+		drk = (l && l.light) != 1,
 		f = function (e) {
 if (e) drk = !drk;
 document.documentElement.className = drk? "z":"y";
-l.light = drk? 0:1;
+try { l.light = drk? 0:1; } catch (ex) { }
 		};
 	f();
 	return f;
@@ -54,3 +54,4 @@ l.light = drk? 0:1;
 	<script src="{{ r }}/.cpr/deps/easymde.js?_={{ ts }}"></script>
 	<script src="{{ r }}/.cpr/mde.js?_={{ ts }}"></script>
 </body></html>
+
--- a/copyparty/web/mde.js
+++ b/copyparty/web/mde.js
@@ -134,14 +134,14 @@ function save(mde) {

 function save_cb() {
    if (this.status !== 200)
-        return toast.err(0, 'Error!  The file was NOT saved.\n\n' + this.status + ": " + (this.responseText + '').replace(/^<pre>/, ""));
+        return toast.err(0, 'Error!  The file was NOT saved.\n\nError ' + this.status + ":\n" + unpre(this.responseText));

    var r;
    try {
        r = JSON.parse(this.responseText);
    }
    catch (ex) {
-        return toast.err(0, 'Failed to parse reply from server:\n\n' + this.responseText);
+        return toast.err(0, 'Error!  The file was likely NOT saved.\n\nFailed to parse reply from server:\n\n' + unpre(this.responseText));
    }

    if (!r.ok) {
@@ -180,7 +180,7 @@ function save_cb() {

 function save_chk() {
    if (this.status !== 200)
-        return toast.err(0, 'Error!  The file was NOT saved.\n\n' + this.status + ": " + (this.responseText + '').replace(/^<pre>/, ""));
+        return toast.err(0, 'Error!  The file was NOT saved.\n\nError ' + this.status + ":\n" + unpre(this.responseText));

    var doc1 = this.txt.replace(/\r\n/g, "\n");
    var doc2 = this.responseText.replace(/\r\n/g, "\n");
--- a/copyparty/web/msg.css
+++ b/copyparty/web/msg.css
@@ -1,3 +1,8 @@
+:root {
+	--font-main: sans-serif;
+	--font-serif: serif;
+	--font-mono: 'scp';
+}
 html,body,tr,th,td,#files,a {
 	color: inherit;
 	background: none;
@@ -10,6 +15,7 @@ html {
 	color: #ccc;
 	background: #333;
 	font-family: sans-serif;
+	font-family: var(--font-main), sans-serif;
 	text-shadow: 1px 1px 0px #000;
 	touch-action: manipulation;
 }
@@ -23,6 +29,7 @@ html, body {
 }
 pre {
 	font-family: monospace, monospace;
+	font-family: var(--font-mono), monospace, monospace;
 }
 a {
 	color: #fc5;
--- a/copyparty/web/msg.html
+++ b/copyparty/web/msg.html
@@ -7,8 +7,8 @@
 	<meta http-equiv="X-UA-Compatible" content="IE=edge">
 	<meta name="viewport" content="width=device-width, initial-scale=0.8">
 	<meta name="theme-color" content="#333">
-{{ html_head }}
 	<link rel="stylesheet" media="screen" href="{{ r }}/.cpr/msg.css?_={{ ts }}">
+{{ html_head }}
 </head>

 <body>
@@ -48,4 +48,5 @@
 	{%- endif %}
 </body>

-</html>
+</html>
+
--- a/copyparty/web/splash.css
+++ b/copyparty/web/splash.css
@@ -2,6 +2,7 @@ html {
 	color: #333;
 	background: #f7f7f7;
 	font-family: sans-serif;
+	font-family: var(--font-main), sans-serif;
 	touch-action: manipulation;
 }
 #wrap {
@@ -127,6 +128,7 @@ pre, code {
 	color: #480;
 	background: #fff;
 	font-family: 'scp', monospace, monospace;
+	font-family: var(--font-mono), 'scp', monospace, monospace;
 	border: 1px solid rgba(128,128,128,0.3);
 	border-radius: .2em;
 	padding: .15em .2em;
--- a/copyparty/web/splash.html
+++ b/copyparty/web/splash.html
@@ -7,9 +7,9 @@
 	<meta http-equiv="X-UA-Compatible" content="IE=edge">
 	<meta name="viewport" content="width=device-width, initial-scale=0.8">
 	<meta name="theme-color" content="#333">
-{{ html_head }}
 	<link rel="stylesheet" media="screen" href="{{ r }}/.cpr/splash.css?_={{ ts }}">
 	<link rel="stylesheet" media="screen" href="{{ r }}/.cpr/ui.css?_={{ ts }}">
+{{ html_head }}
 </head>

 <body>
@@ -78,13 +78,15 @@

 		<h1 id="cc">client config:</h1>
 		<ul>
+			{% if k304 or k304vis %}
 			{% if k304 %}
 			<li><a id="h" href="{{ r }}/?k304=n">disable k304</a> (currently enabled)
 			{%- else %}
 			<li><a id="i" href="{{ r }}/?k304=y" class="r">enable k304</a> (currently disabled)
 			{% endif %}
 			<blockquote id="j">enabling this will disconnect your client on every HTTP 304, which can prevent some buggy proxies from getting stuck (suddenly not loading pages), <em>but</em> it will also make things slower in general</blockquote></li>
-			
+			{% endif %}
+
 			<li><a id="k" href="{{ r }}/?reset" class="r" onclick="localStorage.clear();return true">reset client settings</a></li>
 		</ul>

@@ -110,10 +112,12 @@ var SR = {{ r|tojson }},
 	lang="{{ lang }}",
 	dfavico="{{ favico }}";

-document.documentElement.className=localStorage.cpp_thm||"{{ this.args.theme }}";
+var STG = window.localStorage;
+document.documentElement.className = (STG && STG.cpp_thm) || "{{ this.args.theme }}";

 </script>
 <script src="{{ r }}/.cpr/util.js?_={{ ts }}"></script>
 <script src="{{ r }}/.cpr/splash.js?_={{ ts }}"></script>
 </body>
 </html>
+
--- a/copyparty/web/splash.js
+++ b/copyparty/web/splash.js
@@ -6,7 +6,7 @@ var Ls = {
 		"d1": "tilstand",
 		"d2": "vis tilstanden til alle tråder",
 		"e1": "last innst.",
-		"e2": "leser inn konfigurasjonsfiler på nytt$N(kontoer, volumer, volumbrytere)$Nog kartlegger alle e2ds-volumer",
+		"e2": "leser inn konfigurasjonsfiler på nytt$N(kontoer, volumer, volumbrytere)$Nog kartlegger alle e2ds-volumer$N$Nmerk: endringer i globale parametere$Nkrever en full restart for å ta gjenge",
 		"f1": "du kan betrakte:",
 		"g1": "du kan laste opp til:",
 		"cc1": "klient-konfigurasjon",
@@ -30,7 +30,7 @@ var Ls = {
 	},
 	"eng": {
 		"d2": "shows the state of all active threads",
-		"e2": "reload config files (accounts/volumes/volflags),$Nand rescan all e2ds volumes",
+		"e2": "reload config files (accounts/volumes/volflags),$Nand rescan all e2ds volumes$N$Nnote: any changes to global settings$Nrequire a full restart to take effect",
 		"u2": "time since the last server write$N( upload / rename / ... )$N$N17d = 17 days$N1h23 = 1 hour 23 minutes$N4m56 = 4 minutes 56 seconds",
 		"v2": "use this server as a local HDD$N$NWARNING: this will show your password!",
 	}
@@ -49,6 +49,15 @@ for (var k in (d || {})) {
 			o[a].setAttribute("tt", d[k]);
 }

+try {
+	if (is_idp) {
+		var z = ['#l+div', '#l', '#c'];
+		for (var a = 0; a < z.length; a++)
+			QS(z[a]).style.display = 'none';
+	}
+}
+catch (ex) { }
+
 tt.init();
 var o = QS('input[name="cppwd"]');
 if (!ebi('c') && o.offsetTop + o.offsetHeight < window.innerHeight)
--- a/copyparty/web/svcs.html
+++ b/copyparty/web/svcs.html
@@ -7,10 +7,10 @@
 	<meta http-equiv="X-UA-Compatible" content="IE=edge">
 	<meta name="viewport" content="width=device-width, initial-scale=0.8">
 	<meta name="theme-color" content="#333">
-{{ html_head }}
 	<link rel="stylesheet" media="screen" href="{{ r }}/.cpr/splash.css?_={{ ts }}">
 	<link rel="stylesheet" media="screen" href="{{ r }}/.cpr/ui.css?_={{ ts }}">
 	<style>ul{padding-left:1.3em}li{margin:.4em 0}</style>
+{{ html_head }}
 </head>

 <body>
@@ -238,10 +238,12 @@ var SR = {{ r|tojson }},
    lang="{{ lang }}",
 	dfavico="{{ favico }}";

-document.documentElement.className=localStorage.cpp_thm||"{{ args.theme }}";
+var STG = window.localStorage;
+document.documentElement.className = (STG && STG.cpp_thm) || "{{ args.theme }}";

 </script>
 <script src="{{ r }}/.cpr/util.js?_={{ ts }}"></script>
 <script src="{{ r }}/.cpr/svcs.js?_={{ ts }}"></script>
 </body>
 </html>
+
--- a/copyparty/web/ui.css
+++ b/copyparty/web/ui.css
@@ -1,4 +1,8 @@
 :root {
+	--font-main: sans-serif;
+	--font-serif: serif;
+	--font-mono: 'scp';
+
 	--fg: #ccc;
 	--fg-max: #fff;
 	--bg-u2: #2b2b2b;
@@ -105,6 +109,9 @@ html {
 #toast pre {
 	margin: 0;
 }
+#toast.hide {
+	display: none;
+}
 #toast.vis {
 	right: 1.3em;
 	transform: inherit;
@@ -144,6 +151,10 @@ html {
 #toast.err #toastc {
 	background: #d06;
 }
+#toast code {
+	padding: 0 .2em;
+	background: rgba(0,0,0,0.2);
+}
 #tth {
 	color: #fff;
 	background: #111;
@@ -371,6 +382,7 @@ html.y textarea:focus {
 .mdo code,
 .mdo tt {
 	font-family: 'scp', monospace, monospace;
+	font-family: var(--font-mono), 'scp', monospace, monospace;
 	white-space: pre-wrap;
 	word-break: break-all;
 }
@@ -440,6 +452,7 @@ html.y textarea:focus {
 }
 .mdo blockquote {
 	font-family: serif;
+	font-family: var(--font-serif), serif;
 	background: #f7f7f7;
 	border: .07em dashed #ccc;
 	padding: 0 2em;
@@ -573,3 +586,11 @@ hr {
 		border: .07em dashed #444;
 	}
 }
+
+@media (prefers-reduced-motion) {
+	#toast,
+	#toast a#toastc,
+	#tt {
+		transition: none;
+	}
+}
--- a/copyparty/web/up2k.js
+++ b/copyparty/web/up2k.js
@@ -431,7 +431,7 @@ function U2pvis(act, btns, uc, st) {
        if (sread('potato') === null) {
            btn.click();
            toast.inf(30, L.u_gotpot);
-            localStorage.removeItem('potato');
+            sdrop('potato');
        }

        u2f.appendChild(ode);
@@ -861,13 +861,13 @@ function up2k_init(subtle) {
    bcfg_bind(uc, 'multitask', 'multitask', true, null, false);
    bcfg_bind(uc, 'potato', 'potato', false, set_potato, false);
    bcfg_bind(uc, 'ask_up', 'ask_up', true, null, false);
+    bcfg_bind(uc, 'umod', 'umod', false, null, false);
    bcfg_bind(uc, 'u2ts', 'u2ts', !u2ts.endsWith('u'), set_u2ts, false);
    bcfg_bind(uc, 'fsearch', 'fsearch', false, set_fsearch, false);

    bcfg_bind(uc, 'flag_en', 'flag_en', false, apply_flag_cfg);
    bcfg_bind(uc, 'turbo', 'u2turbo', turbolvl > 1, draw_turbo);
    bcfg_bind(uc, 'datechk', 'u2tdate', turbolvl < 3, null);
-    bcfg_bind(uc, 'appl', 'u2appl', true, null);
    bcfg_bind(uc, 'az', 'u2sort', u2sort.indexOf('n') + 1, set_u2sort);
    bcfg_bind(uc, 'hashw', 'hashw', !!window.WebAssembly && (!subtle || !CHROME || MOBILE || VCHROME >= 107), set_hashw);
    bcfg_bind(uc, 'upnag', 'upnag', false, set_upnag);
@@ -895,6 +895,7 @@ function up2k_init(subtle) {
        "bytes": {
            "total": 0,
            "hashed": 0,
+            "inflight": 0,
            "uploaded": 0,
            "finished": 0
        },
@@ -1311,45 +1312,6 @@ function up2k_init(subtle) {
            });
        }

-        applefilter(good_files);
-    }
-
-    function applefilter(good_files) {
-        if (!uc.appl)
-            return gotallfiles2(good_files);
-
-        var junk = [], rmi = [];
-        for (var a = 0; a < good_files.length; a++) {
-            if (/\/(__MACOS|Icon\r\r)|\/\.(_|DS_Store|AppleDouble|LSOverride|DocumentRevisions-|fseventsd|Spotlight-|TemporaryItems|Trashes|VolumeIcon\.icns|com\.apple\.timemachine\.donotpresent|AppleDB|AppleDesktop|apdisk)/.exec(good_files[a][1])) {
-                junk.push(good_files[a]);
-                rmi.push(a);
-            }
-        }
-
-        if (!junk.length)
-            return gotallfiles2(good_files);
-
-        // todo: if there's hits so far, start looking for appledoubles
-        //   (files named ._foo where foo is another file in the list)
-        //   and get rid of those too
-
-        var msg = L.u_applef.format(junk.length, good_files.length);
-        for (var a = 0, aa = Math.min(20, junk.length); a < aa; a++)
-            msg += '-- ' + junk[a][1] + '\n';
-
-        return modal.confirm(msg, function () {
-            for (var a = rmi.length - 1; a >= 0; a--)
-                good_files.splice(rmi[a], 1);
-
-            start_actx();
-            gotallfiles2(good_files);
-        }, function () {
-            start_actx();
-            gotallfiles2(good_files);
-        });
-    }
-
-    function gotallfiles2(good_files) {
        good_files.sort(function (a, b) {
            a = a[1];
            b = b[1];
@@ -1372,7 +1334,8 @@ function up2k_init(subtle) {
            return modal.confirm(msg.join('') + '</ul>', function () {
                start_actx();
                up_them(good_files);
-                toast.inf(15, L.u_unpt, L.u_unpt);
+                if (have_up2k_idx)
+                    toast.inf(15, L.u_unpt, L.u_unpt);
            }, null);

        up_them(good_files);
@@ -1431,6 +1394,8 @@ function up2k_init(subtle) {
                entry.rand = true;
                entry.name = 'a\n' + entry.name;
            }
+            else if (uc.umod)
+                entry.umod = true;

            if (biggest_file < entry.size)
                biggest_file = entry.size;
@@ -1579,17 +1544,21 @@ function up2k_init(subtle) {
            if (uc.fsearch)
                t.push(['u2etat', st.bytes.hashed, st.bytes.hashed, st.time.hashing]);
        }
+
+        var b_up = st.bytes.inflight + st.bytes.uploaded,
+            b_fin = st.bytes.inflight + st.bytes.finished;
+
        if (nsend) {
            st.time.uploading += td;
-            t.push(['u2etau', st.bytes.uploaded, st.bytes.finished, st.time.uploading]);
+            t.push(['u2etau', b_up, b_fin, st.time.uploading]);
        }
        if ((nhash || nsend) && !uc.fsearch) {
-            if (!st.bytes.finished) {
+            if (!b_fin) {
                ebi('u2etat').innerHTML = L.u_etaprep;
            }
            else {
                st.time.busy += td;
-                t.push(['u2etat', st.bytes.finished, st.bytes.finished, st.time.busy]);
+                t.push(['u2etat', b_fin, b_fin, st.time.busy]);
            }
        }
        for (var a = 0; a < t.length; a++) {
@@ -1753,8 +1722,6 @@ function up2k_init(subtle) {
                        ebi('u2etas').style.textAlign = 'left';
                    }
                    etafun();
-                    if (pvis.act == 'bz')
-                        pvis.changecard('bz');
                }

                if (flag) {
@@ -1890,6 +1857,9 @@ function up2k_init(subtle) {
        timer.rm(donut.do);
        ebi('u2tabw').style.minHeight = '0px';
        utw_minh = 0;
+
+        if (pvis.act == 'bz')
+            pvis.changecard('bz');
    }

    function chill(t) {
@@ -2287,6 +2257,7 @@ function up2k_init(subtle) {
            console.log('handshake onerror, retrying', t.name, t);
            apop(st.busy.handshake, t);
            st.todo.handshake.unshift(t);
+            t.cooldown = Date.now() + 5000 + Math.floor(Math.random() * 3000);
            t.keepalive = keepalive;
        };
        var orz = function (e) {
@@ -2294,16 +2265,26 @@ function up2k_init(subtle) {
                return console.log('zombie handshake onload', t.name, t);

            if (xhr.status == 200) {
+                try {
+                    var response = JSON.parse(xhr.responseText);
+                }
+                catch (ex) {
+                    apop(st.busy.handshake, t);
+                    st.todo.handshake.unshift(t);
+                    t.cooldown = Date.now() + 5000 + Math.floor(Math.random() * 3000);
+                    return toast.err(0, 'Handshake error; will retry...\n\n' + L.badreply + ':\n\n' + unpre(xhr.responseText));
+                }
+
                t.t_handshake = Date.now();
                if (keepalive) {
                    apop(st.busy.handshake, t);
+                    tasker();
                    return;
                }

                if (toast.tag === t)
                    toast.ok(5, L.u_fixed);

-                var response = JSON.parse(xhr.responseText);
                if (!response.name) {
                    var msg = '',
                        smsg = '';
@@ -2507,6 +2488,8 @@ function up2k_init(subtle) {
            req.srch = 1;
        else if (t.rand)
            req.rand = true;
+        else if (t.umod)
+            req.umod = true;

        xhr.open('POST', t.purl, true);
        xhr.responseType = 'text';
@@ -2573,6 +2556,7 @@ function up2k_init(subtle) {
            cdr = t.size;

        var orz = function (xhr) {
+            st.bytes.inflight -= xhr.bsent;
            var txt = unpre((xhr.response && xhr.response.err) || xhr.responseText);
            if (txt.indexOf('upload blocked by x') + 1) {
                apop(st.busy.upload, upt);
@@ -2617,7 +2601,10 @@ function up2k_init(subtle) {
                btot = Math.floor(st.bytes.total / 1024 / 1024);

            xhr.upload.onprogress = function (xev) {
-                pvis.prog(t, npart, xev.loaded);
+                var nb = xev.loaded;
+                st.bytes.inflight += nb - xhr.bsent;
+                xhr.bsent = nb;
+                pvis.prog(t, npart, nb);
            };
            xhr.onload = function (xev) {
                try { orz(xhr); } catch (ex) { vis_exh(ex + '', 'up2k.js', '', '', ex); }
@@ -2626,6 +2613,8 @@ function up2k_init(subtle) {
                if (crashed)
                    return;

+                st.bytes.inflight -= (xhr.bsent || 0);
+
                if (!toast.visible)
                    toast.warn(9.98, L.u_cuerr.format(npart, Math.ceil(t.size / chunksize), t.name), t);

@@ -2642,6 +2631,7 @@ function up2k_init(subtle) {
            if (xhr.overrideMimeType)
                xhr.overrideMimeType('Content-Type', 'application/octet-stream');

+            xhr.bsent = 0;
            xhr.responseType = 'text';
            xhr.send(t.fobj.slice(car, cdr));
        }
@@ -2726,7 +2716,7 @@ function up2k_init(subtle) {

            parallel_uploads = v;
            if (v == u2j)
-                localStorage.removeItem('nthread');
+                sdrop('nthread');
            else
                swrite('nthread', v);

@@ -2742,6 +2732,9 @@ function up2k_init(subtle) {
        if (parallel_uploads > 16)
            parallel_uploads = 16;

+        if (parallel_uploads > 7)
+            toast.warn(10, L.u_maxconn);
+
        obj.value = parallel_uploads;
        bumpthread({ "target": 1 });
    }
@@ -2875,6 +2868,8 @@ function up2k_init(subtle) {
                new_state = false;
                fixed = true;
            }
+            if (new_state === undefined)
+                new_state = can_write ? false : have_up2k_idx ? true : undefined;
        }

        if (new_state === undefined)
--- a/copyparty/web/util.js
+++ b/copyparty/web/util.js
@@ -12,9 +12,11 @@ if (window.CGV)


 var wah = '',
+    STG = null,
    NOAC = 'autocorrect="off" autocapitalize="off"',
    L, tt, treectl, thegrid, up2k, asmCrypto, hashwasm, vbar, marked,
-    CB = '?_=' + Date.now(),
+    T0 = Date.now(),
+    CB = '?_=' + Math.floor(T0 / 1000).toString(36),
    R = SR.slice(1),
    RS = R ? "/" + R : "",
    HALFMAX = 8192 * 8192 * 8192 * 8192,
@@ -39,6 +41,16 @@ if (!window.Notification || !Notification.permission)
 if (!window.FormData)
    window.FormData = false;

+try {
+    STG = window.localStorage;
+    STG.STG;
+}
+catch (ex) {
+    STG = null;
+    if ((ex + '').indexOf('sandbox') < 0)
+        console.log('no localStorage: ' + ex);
+}
+
 try {
    CB = '?' + document.currentScript.src.split('?').pop();

@@ -145,6 +157,10 @@ catch (ex) {
 }
 var crashed = false, ignexd = {}, evalex_fatal = false;
 function vis_exh(msg, url, lineNo, columnNo, error) {
+    var ekey = url + '\n' + lineNo + '\n' + msg;
+    if (ignexd[ekey] || crashed)
+        return;
+
    msg = String(msg);
    url = String(url);

@@ -160,10 +176,12 @@ function vis_exh(msg, url, lineNo, columnNo, error) {
    if (url.indexOf(' > eval') + 1 && !evalex_fatal)
        return;  // md timer

-    var ekey = url + '\n' + lineNo + '\n' + msg;
-    if (ignexd[ekey] || crashed)
+    if (IE && url.indexOf('prism.js') + 1)
        return;

+    if (url.indexOf('easymde.js') + 1)
+        return;  // clicking the preview pane
+
    if (url.indexOf('deps/marked.js') + 1 && !window.WebAssembly)
        return; // ff<52

@@ -202,19 +220,24 @@ function vis_exh(msg, url, lineNo, columnNo, error) {
        }
        ignexd[ekey] = true;

-        var ls = jcp(localStorage);
-        if (ls.fman_clip)
-            ls.fman_clip = ls.fman_clip.length + ' items';
+        var ls = {},
+            lsk = Object.keys(localStorage),
+            nka = lsk.length,
+            nk = Math.min(200, nka);

-        var lsk = Object.keys(ls);
-        lsk.sort();
-        html.push('<p class="b">');
-        for (var a = 0; a < lsk.length; a++) {
-            if (ls[lsk[a]].length > 9000)
-                continue;
+        for (var a = 0; a < nk; a++) {
+            var k = lsk[a],
+                v = localStorage.getItem(k);

-            html.push(' <b>' + esc(lsk[a]) + '</b> <code>' + esc(ls[lsk[a]]) + '</code> ');
+            ls[k] = v.length > 256 ? v.slice(0, 32) + '[...' + v.length + 'b]' : v;
        }
+
+        lsk = Object.keys(ls);
+        lsk.sort();
+        html.push('<p class="b"><b>' + nka + ':&nbsp;</b>');
+        for (var a = 0; a < nk; a++)
+            html.push(' <b>' + esc(lsk[a]) + '</b> <code>' + esc(ls[lsk[a]]) + '</code> ');
+
        html.push('</p>');
    }
    catch (e) { }
@@ -276,10 +299,11 @@ function anymod(e, shift_ok) {
 }


+var dev_fbw = sread('dev_fbw');
 function ev(e) {
    if (!e && window.event) {
        e = window.event;
-        if (localStorage.dev_fbw == 1) {
+        if (dev_fbw == 1) {
            toast.warn(10, 'hello from fallback code ;_;\ncheck console trace');
            console.error('using window.event');
        }
@@ -370,6 +394,22 @@ catch (ex) {
    }
 }

+if (!window.Set)
+    window.Set = function () {
+        var r = this;
+        r.size = 0;
+        r.d = {};
+        r.add = function (k) {
+            if (!r.d[k]) {
+                r.d[k] = 1;
+                r.size++;
+            }
+        };
+        r.has = function (k) {
+            return r.d[k];
+        };
+    };
+
 // https://stackoverflow.com/a/950146
 function import_js(url, cb, ecb) {
    var head = document.head || document.getElementsByTagName('head')[0];
@@ -395,6 +435,25 @@ function unsmart(txt) {
 }


+function namesan(txt, win, fslash) {
+    if (win)
+        txt = (txt.
+            replace(/</g, "＜").
+            replace(/>/g, "＞").
+            replace(/:/g, "：").
+            replace(/"/g, "＂").
+            replace(/\\/g, "＼").
+            replace(/\|/g, "｜").
+            replace(/\?/g, "？").
+            replace(/\*/g, "＊"));
+
+    if (fslash)
+        txt = txt.replace(/\//g, "／");
+
+    return txt;
+}
+
+
 var crctab = (function () {
    var c, tab = [];
    for (var n = 0; n < 256; n++) {
@@ -881,9 +940,16 @@ function jcp(obj) {
 }


+function sdrop(key) {
+    try {
+        STG.removeItem(key);
+    }
+    catch (ex) { }
+}
+
 function sread(key, al) {
    try {
-        var ret = localStorage.getItem(key);
+        var ret = STG.getItem(key);
        return (!al || has(al, ret)) ? ret : null;
    }
    catch (e) {
@@ -894,9 +960,9 @@ function sread(key, al) {
 function swrite(key, val) {
    try {
        if (val === undefined || val === null)
-            localStorage.removeItem(key);
+            STG.removeItem(key);
        else
-            localStorage.setItem(key, val);
+            STG.setItem(key, val);
    }
    catch (e) { }
 }
@@ -1057,7 +1123,7 @@ function dl_file(url) {

 function cliptxt(txt, ok) {
    var fb = function () {
-        console.log('fb');
+        console.log('clip-fb');
        var o = mknod('input');
        o.value = txt;
        document.body.appendChild(o);
@@ -1351,9 +1417,12 @@ function lf2br(txt) {
 }


-function unpre(txt) {
+function hunpre(txt) {
    return ('' + txt).replace(/^<pre>/, '');
 }
+function unpre(txt) {
+    return esc(hunpre(txt));
+}


 var toast = (function () {
@@ -1392,15 +1461,23 @@ var toast = (function () {
    }

    r.hide = function (e) {
-        ev(e);
+        if (this === ebi('toastc'))
+            ev(e);
+
        unscroll();
        clearTimeout(te);
        clmod(obj, 'vis');
        r.visible = false;
        r.tag = obj;
+        if (!window.WebAssembly)
+            te = setTimeout(function () {
+                obj.className = 'hide';
+            }, 500);
    };

    r.show = function (cl, sec, txt, tag) {
+        txt = (txt + '').slice(0, 16384);
+
        var same = r.visible && txt == r.p_txt && r.p_sec == sec,
            delta = Date.now() - r.p_t;

@@ -1558,7 +1635,7 @@ var modal = (function () {
    };

    var onkey = function (e) {
-        var k = e.code,
+        var k = (e.code || e.key) + '',
            eok = ebi('modal-ok'),
            eng = ebi('modal-ng'),
            ae = document.activeElement;
@@ -1573,10 +1650,10 @@ var modal = (function () {
            return ok(e);
        }

-        if ((k == 'ArrowLeft' || k == 'ArrowRight') && eng && (ae == eok || ae == eng))
+        if ((k == 'ArrowLeft' || k == 'ArrowRight' || k == 'Left' || k == 'Right') && eng && (ae == eok || ae == eng))
            return (ae == eok ? eng : eok).focus() || ev(e);

-        if (k == 'Escape')
+        if (k == 'Escape' || k == 'Esc')
            return ng(e);
    }

@@ -1854,21 +1931,17 @@ var favico = (function () {
        var b64;
        try {
            b64 = btoa(svg ? svg_decl + svg : gx(r.txt));
-            //console.log('f1');
        }
        catch (e1) {
            try {
                b64 = btoa(gx(encodeURIComponent(r.txt).replace(/%([0-9A-F]{2})/g,
                    function x(m, v) { return String.fromCharCode('0x' + v); })));
-                //console.log('f2');
            }
            catch (e2) {
                try {
                    b64 = btoa(gx(unescape(encodeURIComponent(r.txt))));
-                    //console.log('f3');
                }
                catch (e3) {
-                    //console.log('fe');
                    return;
                }
            }
@@ -1922,15 +1995,24 @@ function xhrchk(xhr, prefix, e404, lvl, tag) {
    if (xhr.status < 400 && xhr.status >= 200)
        return true;

-    var errtxt = (xhr.response && xhr.response.err) || xhr.responseText,
+    if (tag === undefined)
+        tag = prefix;
+
+    var errtxt = ((xhr.response && xhr.response.err) || xhr.responseText) || '',
+        suf = '',
        fun = toast[lvl || 'err'],
        is_cf = /[Cc]loud[f]lare|>Just a mo[m]ent|#cf-b[u]bbles|Chec[k]ing your br[o]wser|\/chall[e]nge-platform|"chall[e]nge-error|nable Ja[v]aScript and cook/.test(errtxt);

+    if (errtxt.startsWith('<pre>'))
+        suf = '\n\nerror-details: «' + unpre(errtxt).split('\n')[0].trim() + '»';
+    else
+        errtxt = esc(errtxt).slice(0, 32768);
+
    if (xhr.status == 403 && !is_cf)
-        return toast.err(0, prefix + (L && L.xhr403 || "403: access denied\n\ntry pressing F5, maybe you got logged out"), tag);
+        return toast.err(0, prefix + (L && L.xhr403 || "403: access denied\n\ntry pressing F5, maybe you got logged out") + suf, tag);

    if (xhr.status == 404)
-        return toast.err(0, prefix + e404, tag);
+        return toast.err(0, prefix + e404 + suf, tag);

    if (is_cf && (xhr.status == 403 || xhr.status == 503)) {
        var now = Date.now(), td = now - cf_cha_t;
--- a/docs/README.md
+++ b/docs/README.md
@@ -13,6 +13,9 @@

 # other stuff

+## [`TODO.md`](TODO.md)
+* planned features / fixes / changes
+
 ## [`example.conf`](example.conf)
 * example config file for `-c`

--- a/docs/TODO.md
+++ b/docs/TODO.md
@@ -0,0 +1,18 @@
+a living list of upcoming features / fixes / changes, very roughly in order of priority
+
+* download accelerator
+  * definitely download chunks in parallel
+  * maybe resumable downloads (chrome-only, jank api)
+  * maybe checksum validation (return sha512 of requested range in responses, and probably also warks)
+
+* [github issue #64](https://github.com/9001/copyparty/issues/64) - dirkeys 2nd season
+  * popular feature request, finally time to refactor browser.js i suppose...
+
+* [github issue #37](https://github.com/9001/copyparty/issues/37) - upload PWA
+  * or [maybe not](https://arstechnica.com/tech-policy/2024/02/apple-under-fire-for-disabling-iphone-web-apps-eu-asks-developers-to-weigh-in/), or [maybe](https://arstechnica.com/gadgets/2024/03/apple-changes-course-will-keep-iphone-eu-web-apps-how-they-are-in-ios-17-4/)
+
+* [github issue #57](https://github.com/9001/copyparty/issues/57) - config GUI
+  * configs given to -c can be ordered with numerical prefix
+  * autorevert settings if it fails to apply
+  * countdown until session invalidates in settings gui, with refresh-button
+
--- a/docs/changelog.md
+++ b/docs/changelog.md
--- a/docs/devnotes.md
+++ b/docs/devnotes.md
@@ -218,7 +218,7 @@ if you don't need all the features, you can repack the sfx and save a bunch of s
 * `269k` after `./scripts/make-sfx.sh re no-cm no-hl`

 the features you can opt to drop are
-* `cm`/easymde, the "fancy" markdown editor, saves ~82k
+* `cm`/easymde, the "fancy" markdown editor, saves ~89k
 * `hl`, prism, the syntax hilighter, saves ~41k
 * `fnt`, source-code-pro, the monospace font, saves ~9k
 * `dd`, the custom mouse cursor for the media player tray tab, saves ~2k
@@ -242,6 +242,7 @@ python3 -m venv .venv
 pip install jinja2 strip_hints  # MANDATORY
 pip install mutagen  # audio metadata
 pip install pyftpdlib  # ftp server
+pip install partftpy  # tftp server
 pip install impacket  # smb server -- disable Windows Defender if you REALLY need this on windows
 pip install Pillow pyheif-pillow-opener pillow-avif-plugin  # thumbnails
 pip install pyvips  # faster thumbnails
--- a/docs/examples/docker/basic-docker-compose/copyparty.conf
+++ b/docs/examples/docker/basic-docker-compose/copyparty.conf
@@ -10,7 +10,6 @@

  # q, lo: /cfg/log/%Y-%m%d.log   # log to file instead of docker

-  # ftp: 3921        # enable ftp server on port 3921
  # p: 3939          # listen on another port
  # ipa: 10.89.      # only allow connections from 10.89.*
  # df: 16           # stop accepting uploads if less than 16 GB free disk space
--- a/docs/examples/docker/idp-authelia-traefik/README.md
+++ b/docs/examples/docker/idp-authelia-traefik/README.md
@@ -0,0 +1,50 @@
+> [!WARNING]  
+> I am unable to guarantee the quality, safety, and security of anything in this folder; it is a combination of examples I found online. Please submit corrections or improvements 🙏
+
+to try this out with minimal adjustments:
+* specify what filesystem-path to share with copyparty, replacing the default/example value `/srv/pub` in `docker-compose.yml`
+* add `127.0.0.1 fs.example.com traefik.example.com authelia.example.com` to your `/etc/hosts`
+* `sudo docker-compose up`
+* login to https://fs.example.com/ with username `authelia` password `authelia`
+
+to use this in a safe and secure manner:
+* follow a guide on setting up authelia properly (TODO:link) and use the copyparty-specific parts of this folder as inspiration for your own config; namely the `cpp` subfolder and the `copyparty` service in `docker-compose.yml`
+
+this folder is based on:
+* https://github.com/authelia/authelia/tree/39763aaed24c4abdecd884b47357a052b235942d/examples/compose/lite
+
+incomplete list of modifications made:
+* support for running with podman as root on fedora (`:z` volumes, `label:disable`)
+* explicitly using authelia `v4.38.0-beta3` because config syntax changed since last stable release
+* disabled automatic letsencrypt certificate signing
+* reduced logging from debug to info
+* added a warning that traefik is given access to the docker socket (as recommended by traefik docs) which means traefik is able to break out of the container and has full root access on the host machine
+
+
+# security
+
+there is probably/definitely room for improvement in this example setup. Some ideas taken from [github issue #62](https://github.com/9001/copyparty/issues/62):
+
+* Add in a redis password to limit attacker lateral movement in the system
+* Move redis to a private network shared with just authelia
+* Pin to image hashes (or go all in on updates and add `watchtower`)
+* Drop bridge networking for just exposing traefik's public ports
+* Configure docker for non-root access to docker socket and then move traefik to use [non-root perms](https://docs.docker.com/engine/security/rootless/)
+
+if you manage to improve on any of this, especially in a way that might be useful for other people, consider sending a PR :>
+
+
+# performance
+
+currently **not optimal,** at least when compared to running the python sfx outside of docker... some numbers from my laptop (ryzen4500u/fedora39):
+
+| req/s |  https D/L | http D/L | approach |
+| -----:| ----------:|:--------:| -------- |
+|  5200 | 1294 MiB/s | 5+ GiB/s | [copyparty-sfx.py](https://github.com/9001/copyparty/releases/latest/download/copyparty-sfx.py) running on host |
+|  4370 |  725 MiB/s | 4+ GiB/s | `docker run copyparty/ac` |
+|  2420 |  694 MiB/s | n/a      | `copyparty/ac` behind traefik |
+|    75 |  694 MiB/s | n/a      | traefik and authelia **(you are here)** |
+
+authelia is behaving strangely, handling 340 requests per second for a while, but then it suddenly drops to 75 and stays there...
+
+I'm assuming all of the performance issues is due to a misconfiguration of authelia/traefik/docker on my end, but I don't relly know where to start
--- a/docs/examples/docker/idp-authelia-traefik/authelia/configuration.yml
+++ b/docs/examples/docker/idp-authelia-traefik/authelia/configuration.yml
@@ -0,0 +1,66 @@
+# based on https://github.com/authelia/authelia/blob/39763aaed24c4abdecd884b47357a052b235942d/examples/compose/lite/authelia/configuration.yml
+
+# Authelia configuration
+
+# This secret can also be set using the env variables AUTHELIA_JWT_SECRET_FILE
+jwt_secret: a_very_important_secret
+
+server:
+  address: 'tcp://:9091'
+
+log:
+  level: info  # debug
+
+totp:
+  issuer: authelia.com
+
+authentication_backend:
+  file:
+    path: /config/users_database.yml
+
+access_control:
+  default_policy: deny
+  rules:
+    # Rules applied to everyone
+    - domain: traefik.example.com
+      policy: one_factor
+    - domain: fs.example.com
+      policy: one_factor
+
+session:
+  # This secret can also be set using the env variables AUTHELIA_SESSION_SECRET_FILE
+  secret: unsecure_session_secret
+
+  cookies:
+    - name: authelia_session
+      domain: example.com  # Should match whatever your root protected domain is
+      default_redirection_url: https://fs.example.com
+      authelia_url: https://authelia.example.com/
+      expiration: 3600  # 1 hour
+      inactivity: 300  # 5 minutes
+
+  redis:
+    host: redis
+    port: 6379
+    # This secret can also be set using the env variables AUTHELIA_SESSION_REDIS_PASSWORD_FILE
+    # password: authelia
+
+regulation:
+  max_retries: 3
+  find_time: 120
+  ban_time: 300
+
+storage:
+  encryption_key: you_must_generate_a_random_string_of_more_than_twenty_chars_and_configure_this
+  local:
+    path: /config/db.sqlite3
+
+notifier:
+  disable_startup_check: true
+  smtp:
+    username: test
+    # This secret can also be set using the env variables AUTHELIA_NOTIFIER_SMTP_PASSWORD_FILE
+    password: password
+    host: mail.example.com
+    port: 25
+    sender: admin@example.com
--- a/docs/examples/docker/idp-authelia-traefik/authelia/users_database.yml
+++ b/docs/examples/docker/idp-authelia-traefik/authelia/users_database.yml
@@ -0,0 +1,18 @@
+# based on https://github.com/authelia/authelia/blob/39763aaed24c4abdecd884b47357a052b235942d/examples/compose/lite/authelia/users_database.yml
+
+# Users Database
+
+# This file can be used if you do not have an LDAP set up.
+
+# List of users
+users:
+  authelia:
+    disabled: false
+    displayname: "Authelia User"
+    # Password is authelia
+    password: "$6$rounds=50000$BpLnfgDsc2WD8F2q$Zis.ixdg9s/UOJYrs56b5QEZFiZECu0qZVNsIYxBaNJ7ucIL.nlxVCT5tqh8KHG8X4tlwCFm5r6NTOZZ5qRFN/"
+    email: authelia@authelia.com
+    groups:
+      - admins
+      - dev
+      - su
--- a/docs/examples/docker/idp-authelia-traefik/cpp/copyparty.conf
+++ b/docs/examples/docker/idp-authelia-traefik/cpp/copyparty.conf
@@ -0,0 +1,82 @@
+# not actually YAML but lets pretend:
+# -*- mode: yaml -*-
+# vim: ft=yaml:
+
+
+# example config for how authelia can be used to replace
+# copyparty's built-in authentication/authorization mechanism,
+# providing copyparty with HTTP headers through traefik to
+# signify who the user is, and what groups they belong to
+#
+# the filesystem-path that will be shared with copyparty is
+# specified in the docker-compose in the parent folder, where
+# a real filesystem-path is mapped onto this container's path `/w`,
+# meaning `/w` in this config-file is actually `/srv/pub` in the
+# outside world (assuming you didn't modify that value)
+
+
+[global]
+  e2dsa  # enable file indexing and filesystem scanning
+  e2ts   # enable multimedia indexing
+  ansi   # enable colors in log messages
+  #q      # disable logging for more performance
+
+  # if we are confident that we got the docker-network config correct
+  # (meaning copyparty is only accessible through traefik, and
+  #  traefik makes sure that all requests go through authelia),
+  # then accept X-Forwarded-For and IdP headers from any private IP:
+  xff-src: lan
+
+  # enable IdP support by expecting username/groupname in
+  # http-headers provided by the reverse-proxy; header "X-IdP-User"
+  # will contain the username, "X-IdP-Group" the groupname
+  idp-h-usr: remote-user
+  idp-h-grp: remote-groups
+
+  # DEBUG: show all incoming request headers from traefik/authelia
+  #ihead: *
+
+
+[/]      # create a volume at "/" (the webroot), which will
+  /w     # share /w (the docker data volume, which is mapped to /srv/pub on the host in docker-compose.yml)
+  accs:
+    rw: *       # everyone gets read-access, but
+    rwmda: @su  # the group "su" gets read-write-move-delete-admin
+
+
+[/u/${u}]    # each user gets their own home-folder at /u/username
+  /w/u/${u}  # which will be "u/username" in the docker data volume
+  accs:
+    r: *              # read-access for anyone, and
+    rwmda: ${u}, @su  # read-write-move-delete-admin for that username + the "su" group
+
+
+[/u/${u}/priv]    # each user also gets a private area at /u/username/priv
+  /w/u/${u}/priv  # stored at DATAVOLUME/u/username/priv
+  accs:
+    rwmda: ${u}, @su  # read-write-move-delete-admin for that username + the "su" group
+
+
+[/lounge/${g}]    # each group gets their own shared volume
+  /w/lounge/${g}  # stored at DATAVOLUME/lounge/groupname
+  accs:
+    r: *               # read-access for anyone, and
+    rwmda: @${g}, @su  # read-write-move-delete-admin for that group + the "su" group
+
+
+[/lounge/${g}/priv]    # and a private area for each group too
+  /w/lounge/${g}/priv  # stored at DATAVOLUME/lounge/groupname/priv
+  accs:
+    rwmda: @${g}, @su  # read-write-move-delete-admin for that group + the "su" group
+
+
+# and create some strategic volumes to prevent anyone from gaining
+# unintended access to priv folders if the users/groups db is lost
+[/u]
+  /w/u
+  accs:
+    rwmda: @su
+[/lounge]
+  /w/lounge
+  accs:
+    rwmda: @su
--- a/docs/examples/docker/idp-authelia-traefik/docker-compose.yml
+++ b/docs/examples/docker/idp-authelia-traefik/docker-compose.yml
@@ -0,0 +1,99 @@
+version: '3.3'
+
+networks:
+  net:
+    driver: bridge
+
+services:
+  copyparty:
+    image: copyparty/ac
+    container_name: idp_copyparty
+    user: "1000:1000"  # should match the user/group of your fileshare volumes
+    volumes:
+      - ./cpp/:/cfg:z  # the copyparty config folder
+      - /srv/pub:/w:z  # this is where we declare that "/srv/pub" is the filesystem-path on the server that shall be shared online
+    networks:
+      - net
+    expose:
+      - 3923
+    labels:
+      - 'traefik.enable=true'
+      - 'traefik.http.routers.copyparty.rule=Host(`fs.example.com`)'
+      - 'traefik.http.routers.copyparty.entrypoints=https'
+      - 'traefik.http.routers.copyparty.tls=true'
+      - 'traefik.http.routers.copyparty.middlewares=authelia@docker'
+    stop_grace_period: 15s  # thumbnailer is allowed to continue finishing up for 10s after the shutdown signal
+
+  authelia:
+    image: authelia/authelia:v4.38.0-beta3  # the config files in the authelia folder use the new syntax
+    container_name: idp_authelia
+    volumes:
+      - ./authelia:/config:z
+    networks:
+      - net
+    labels:
+      - 'traefik.enable=true'
+      - 'traefik.http.routers.authelia.rule=Host(`authelia.example.com`)'
+      - 'traefik.http.routers.authelia.entrypoints=https'
+      - 'traefik.http.routers.authelia.tls=true'
+      #- 'traefik.http.routers.authelia.tls.certresolver=letsencrypt'  # uncomment this to enable automatic certificate signing (1/2)
+      - 'traefik.http.middlewares.authelia.forwardauth.address=http://authelia:9091/api/authz/forward-auth?authelia_url=https://authelia.example.com'
+      - 'traefik.http.middlewares.authelia.forwardauth.trustForwardHeader=true'
+      - 'traefik.http.middlewares.authelia.forwardauth.authResponseHeaders=Remote-User,Remote-Groups,Remote-Name,Remote-Email'
+    expose:
+      - 9091
+    restart: unless-stopped
+    healthcheck:
+      disable: true
+    environment:
+      - TZ=Etc/UTC
+
+  redis:
+    image: redis:7.2.4-alpine3.19
+    container_name: idp_redis
+    volumes:
+      - ./redis:/data:z
+    networks:
+      - net
+    expose:
+      - 6379
+    restart: unless-stopped
+    environment:
+      - TZ=Etc/UTC
+
+  traefik:
+    image: traefik:2.11.0
+    container_name: idp_traefik
+    volumes:
+      - ./traefik:/etc/traefik:z
+      - /var/run/docker.sock:/var/run/docker.sock  # WARNING: this gives traefik full root-access to the host OS, but is recommended/required(?) by traefik
+    security_opt:
+      - label:disable  # disable selinux because it (rightly) blocks access to docker.sock
+    networks:
+      - net
+    labels:
+      - 'traefik.enable=true'
+      - 'traefik.http.routers.api.rule=Host(`traefik.example.com`)'
+      - 'traefik.http.routers.api.entrypoints=https'
+      - 'traefik.http.routers.api.service=api@internal'
+      - 'traefik.http.routers.api.tls=true'
+      #- 'traefik.http.routers.api.tls.certresolver=letsencrypt'  # uncomment this to enable automatic certificate signing (2/2)
+      - 'traefik.http.routers.api.middlewares=authelia@docker'
+    ports:
+      - '80:80'
+      - '443:443'
+    command:
+      - '--api'
+      - '--providers.docker=true'
+      - '--providers.docker.exposedByDefault=false'
+      - '--entrypoints.http=true'
+      - '--entrypoints.http.address=:80'
+      - '--entrypoints.http.http.redirections.entrypoint.to=https'
+      - '--entrypoints.http.http.redirections.entrypoint.scheme=https'
+      - '--entrypoints.https=true'
+      - '--entrypoints.https.address=:443'
+      - '--certificatesResolvers.letsencrypt.acme.email=your-email@your-domain.com'
+      - '--certificatesResolvers.letsencrypt.acme.storage=/etc/traefik/acme.json'
+      - '--certificatesResolvers.letsencrypt.acme.httpChallenge.entryPoint=http'
+      - '--log=true'
+      - '--log.level=WARNING'  # DEBUG
--- a/docs/examples/docker/idp-authentik-traefik/README.md
+++ b/docs/examples/docker/idp-authentik-traefik/README.md
@@ -0,0 +1,12 @@
+> [!WARNING]  
+> I am unable to guarantee the quality, safety, and security of anything in this folder; it is a combination of examples I found online. Please submit corrections or improvements 🙏
+
+> [!WARNING]  
+> does not work yet... if you are able to fix this, please do!
+
+this is based on:
+* https://goauthentik.io/docker-compose.yml
+* https://goauthentik.io/docs/providers/proxy/server_traefik
+
+incomplete list of modifications made:
+* support for running with podman as root on fedora (`:z` volumes, `label:disable`)
--- a/docs/examples/docker/idp-authentik-traefik/based-on/docker-compose-authentik.yml
+++ b/docs/examples/docker/idp-authentik-traefik/based-on/docker-compose-authentik.yml
@@ -0,0 +1,88 @@
+# https://goauthentik.io/docker-compose.yml
+---
+version: "3.4"
+
+services:
+  postgresql:
+    image: docker.io/library/postgres:12-alpine
+    restart: unless-stopped
+    healthcheck:
+      test: ["CMD-SHELL", "pg_isready -d $${POSTGRES_DB} -U $${POSTGRES_USER}"]
+      start_period: 20s
+      interval: 30s
+      retries: 5
+      timeout: 5s
+    volumes:
+      - database:/var/lib/postgresql/data
+    environment:
+      POSTGRES_PASSWORD: ${PG_PASS:?database password required}
+      POSTGRES_USER: ${PG_USER:-authentik}
+      POSTGRES_DB: ${PG_DB:-authentik}
+    env_file:
+      - .env
+  redis:
+    image: docker.io/library/redis:alpine
+    command: --save 60 1 --loglevel warning
+    restart: unless-stopped
+    healthcheck:
+      test: ["CMD-SHELL", "redis-cli ping | grep PONG"]
+      start_period: 20s
+      interval: 30s
+      retries: 5
+      timeout: 3s
+    volumes:
+      - redis:/data
+  server:
+    image: ${AUTHENTIK_IMAGE:-ghcr.io/goauthentik/server}:${AUTHENTIK_TAG:-2024.2.1}
+    restart: unless-stopped
+    command: server
+    environment:
+      AUTHENTIK_REDIS__HOST: redis
+      AUTHENTIK_POSTGRESQL__HOST: postgresql
+      AUTHENTIK_POSTGRESQL__USER: ${PG_USER:-authentik}
+      AUTHENTIK_POSTGRESQL__NAME: ${PG_DB:-authentik}
+      AUTHENTIK_POSTGRESQL__PASSWORD: ${PG_PASS}
+    volumes:
+      - ./media:/media
+      - ./custom-templates:/templates
+    env_file:
+      - .env
+    ports:
+      - "${COMPOSE_PORT_HTTP:-9000}:9000"
+      - "${COMPOSE_PORT_HTTPS:-9443}:9443"
+    depends_on:
+      - postgresql
+      - redis
+  worker:
+    image: ${AUTHENTIK_IMAGE:-ghcr.io/goauthentik/server}:${AUTHENTIK_TAG:-2024.2.1}
+    restart: unless-stopped
+    command: worker
+    environment:
+      AUTHENTIK_REDIS__HOST: redis
+      AUTHENTIK_POSTGRESQL__HOST: postgresql
+      AUTHENTIK_POSTGRESQL__USER: ${PG_USER:-authentik}
+      AUTHENTIK_POSTGRESQL__NAME: ${PG_DB:-authentik}
+      AUTHENTIK_POSTGRESQL__PASSWORD: ${PG_PASS}
+    # `user: root` and the docker socket volume are optional.
+    # See more for the docker socket integration here:
+    # https://goauthentik.io/docs/outposts/integrations/docker
+    # Removing `user: root` also prevents the worker from fixing the permissions
+    # on the mounted folders, so when removing this make sure the folders have the correct UID/GID
+    # (1000:1000 by default)
+    user: root
+    volumes:
+      - /var/run/docker.sock:/var/run/docker.sock
+      - ./media:/media
+      - ./certs:/certs
+      - ./custom-templates:/templates
+    env_file:
+      - .env
+    depends_on:
+      - postgresql
+      - redis
+
+volumes:
+  database:
+    driver: local
+  redis:
+    driver: local
--- a/docs/examples/docker/idp-authentik-traefik/based-on/docker-compose-traefik.yml
+++ b/docs/examples/docker/idp-authentik-traefik/based-on/docker-compose-traefik.yml
@@ -0,0 +1,46 @@
+# https://goauthentik.io/docs/providers/proxy/server_traefik
+---
+version: "3.7"
+services:
+  traefik:
+    image: traefik:v2.2
+    container_name: traefik
+    volumes:
+      - /var/run/docker.sock:/var/run/docker.sock
+    ports:
+      - 80:80
+    command:
+      - "--api"
+      - "--providers.docker=true"
+      - "--providers.docker.exposedByDefault=false"
+      - "--entrypoints.web.address=:80"
+
+  authentik-proxy:
+    image: ghcr.io/goauthentik/proxy
+    ports:
+      - 9000:9000
+      - 9443:9443
+    environment:
+      AUTHENTIK_HOST: https://your-authentik.tld
+      AUTHENTIK_INSECURE: "false"
+      AUTHENTIK_TOKEN: token-generated-by-authentik
+      # Starting with 2021.9, you can optionally set this too
+      # when authentik_host for internal communication doesn't match the public URL
+      # AUTHENTIK_HOST_BROWSER: https://external-domain.tld
+    labels:
+      traefik.enable: true
+      traefik.port: 9000
+      traefik.http.routers.authentik.rule: Host(`app.company`) && PathPrefix(`/outpost.goauthentik.io/`)
+      # `authentik-proxy` refers to the service name in the compose file.
+      traefik.http.middlewares.authentik.forwardauth.address: http://authentik-proxy:9000/outpost.goauthentik.io/auth/traefik
+      traefik.http.middlewares.authentik.forwardauth.trustForwardHeader: true
+      traefik.http.middlewares.authentik.forwardauth.authResponseHeaders: X-authentik-username,X-authentik-groups,X-authentik-email,X-authentik-name,X-authentik-uid,X-authentik-jwt,X-authentik-meta-jwks,X-authentik-meta-outpost,X-authentik-meta-provider,X-authentik-meta-app,X-authentik-meta-version
+    restart: unless-stopped
+
+  whoami:
+    image: containous/whoami
+    labels:
+      traefik.enable: true
+      traefik.http.routers.whoami.rule: Host(`app.company`)
+      traefik.http.routers.whoami.middlewares: authentik@docker
+    restart: unless-stopped
--- a/docs/examples/docker/idp-authentik-traefik/cpp/copyparty.conf
+++ b/docs/examples/docker/idp-authentik-traefik/cpp/copyparty.conf
@@ -0,0 +1,72 @@
+# not actually YAML but lets pretend:
+# -*- mode: yaml -*-
+# vim: ft=yaml:
+
+
+# example config for how copyparty can be used with an identity
+# provider, replacing the built-in authentication/authorization
+# mechanism, and instead expecting the reverse-proxy to provide
+# the requester's username (and possibly a group-name, for
+# optional group-based access control)
+#
+# the filesystem-path `/w` is used as the storage location
+# because that is the data-volume in the docker containers,
+# because a deployment like this (with an IdP) is more commonly
+# seen in containerized environments -- but this is not required
+
+
+[global]
+  e2dsa  # enable file indexing and filesystem scanning
+  e2ts   # enable multimedia indexing
+  ansi   # enable colors in log messages
+
+  # enable IdP support by expecting username/groupname in
+  # http-headers provided by the reverse-proxy; header "X-IdP-User"
+  # will contain the username, "X-IdP-Group" the groupname
+  idp-h-usr: x-idp-user
+  idp-h-grp: x-idp-group
+
+
+[/]      # create a volume at "/" (the webroot), which will
+  /w     # share /w (the docker data volume, which is mapped to /srv/pub on the host in docker-compose.yml)
+  accs:
+    rw: *       # everyone gets read-access, but
+    rwmda: @su  # the group "su" gets read-write-move-delete-admin
+
+
+[/u/${u}]    # each user gets their own home-folder at /u/username
+  /w/u/${u}  # which will be "u/username" in the docker data volume
+  accs:
+    r: *              # read-access for anyone, and
+    rwmda: ${u}, @su  # read-write-move-delete-admin for that username + the "su" group
+
+
+[/u/${u}/priv]    # each user also gets a private area at /u/username/priv
+  /w/u/${u}/priv  # stored at DATAVOLUME/u/username/priv
+  accs:
+    rwmda: ${u}, @su  # read-write-move-delete-admin for that username + the "su" group
+
+
+[/lounge/${g}]    # each group gets their own shared volume
+  /w/lounge/${g}  # stored at DATAVOLUME/lounge/groupname
+  accs:
+    r: *               # read-access for anyone, and
+    rwmda: @${g}, @su  # read-write-move-delete-admin for that group + the "su" group
+
+
+[/lounge/${g}/priv]    # and a private area for each group too
+  /w/lounge/${g}/priv  # stored at DATAVOLUME/lounge/groupname/priv
+  accs:
+    rwmda: @${g}, @su  # read-write-move-delete-admin for that group + the "su" group
+
+
+# and create some strategic volumes to prevent anyone from gaining
+# unintended access to priv folders if the users/groups db is lost
+[/u]
+  /w/u
+  accs:
+    rwmda: @su
+[/lounge]
+  /w/lounge
+  accs:
+    rwmda: @su
--- a/docs/examples/docker/idp-authentik-traefik/docker-compose.yml
+++ b/docs/examples/docker/idp-authentik-traefik/docker-compose.yml
@@ -0,0 +1,131 @@
+version: "3.4"
+
+volumes:
+  database:
+    driver: local
+  redis:
+    driver: local
+
+services:
+  copyparty:
+    image: copyparty/ac
+    container_name: idp_copyparty
+    restart: unless-stopped
+    user: "1000:1000"  # should match the user/group of your fileshare volumes
+    volumes:
+      - ./cpp/:/cfg:z  # the copyparty config folder
+      - /srv/pub:/w:z  # this is where we declare that "/srv/pub" is the filesystem-path on the server that shall be shared online
+    ports:
+      - 3923
+    labels:
+      - 'traefik.enable=true'
+      - 'traefik.http.routers.fs.rule=Host(`fs.example.com`)'
+      - 'traefik.http.routers.fs.entrypoints=http'
+      #- 'traefik.http.routers.fs.middlewares=authelia@docker'  # TODO: ???
+    healthcheck:
+      test: ["CMD-SHELL", "wget --spider -q 127.0.0.1:3923/?reset"]
+      interval: 1m
+      timeout: 2s
+      retries: 5
+      start_period: 15s
+    stop_grace_period: 15s  # thumbnailer is allowed to continue finishing up for 10s after the shutdown signal
+
+  traefik:
+    image: traefik:v2.11
+    container_name: traefik
+    volumes:
+      - /var/run/docker.sock:/var/run/docker.sock  # WARNING: this gives traefik full root-access to the host OS, but is recommended/required(?) by traefik
+    security_opt:
+      - label:disable  # disable selinux because it (rightly) blocks access to docker.sock
+    ports:
+      - 80:80
+    command:
+      - '--api'
+      - '--providers.docker=true'
+      - '--providers.docker.exposedByDefault=false'
+      - '--entrypoints.web.address=:80'
+
+  postgresql:
+    image: docker.io/library/postgres:12-alpine
+    container_name: idp_postgresql
+    restart: unless-stopped
+    healthcheck:
+      test: ["CMD-SHELL", "pg_isready -d $${POSTGRES_DB} -U $${POSTGRES_USER}"]
+      start_period: 20s
+      interval: 30s
+      retries: 5
+      timeout: 5s
+    volumes:
+      - database:/var/lib/postgresql/data:z
+    environment:
+      POSTGRES_PASSWORD: postgrass
+      POSTGRES_USER: authentik
+      POSTGRES_DB: authentik
+    env_file:
+      - .env
+
+  redis:
+    image: docker.io/library/redis:alpine
+    command: --save 60 1 --loglevel warning
+    container_name: idp_redis
+    restart: unless-stopped
+    healthcheck:
+      test: ["CMD-SHELL", "redis-cli ping | grep PONG"]
+      start_period: 20s
+      interval: 30s
+      retries: 5
+      timeout: 3s
+    volumes:
+      - redis:/data:z
+
+  authentik_server:
+    image: ghcr.io/goauthentik/server:2024.2.1
+    container_name: idp_authentik_server
+    restart: unless-stopped
+    command: server
+    environment:
+      AUTHENTIK_REDIS__HOST: redis
+      AUTHENTIK_POSTGRESQL__HOST: postgresql
+      AUTHENTIK_POSTGRESQL__USER: authentik
+      AUTHENTIK_POSTGRESQL__NAME: authentik
+      AUTHENTIK_POSTGRESQL__PASSWORD: postgrass
+    volumes:
+      - ./media:/media:z
+      - ./custom-templates:/templates:z
+    env_file:
+      - .env
+    ports:
+      - 9000
+      - 9443
+    depends_on:
+      - postgresql
+      - redis
+
+  authentik_worker:
+    image: ghcr.io/goauthentik/server:2024.2.1
+    container_name: idp_authentik_worker
+    restart: unless-stopped
+    command: worker
+    environment:
+      AUTHENTIK_REDIS__HOST: redis
+      AUTHENTIK_POSTGRESQL__HOST: postgresql
+      AUTHENTIK_POSTGRESQL__USER: authentik
+      AUTHENTIK_POSTGRESQL__NAME: authentik
+      AUTHENTIK_POSTGRESQL__PASSWORD: postgrass
+    # `user: root` and the docker socket volume are optional.
+    # See more for the docker socket integration here:
+    # https://goauthentik.io/docs/outposts/integrations/docker
+    # Removing `user: root` also prevents the worker from fixing the permissions
+    # on the mounted folders, so when removing this make sure the folders have the correct UID/GID
+    # (1000:1000 by default)
+    user: root
+    volumes:
+      - /var/run/docker.sock:/var/run/docker.sock
+      - ./media:/media:z
+      - ./certs:/certs:z
+      - ./custom-templates:/templates:z
+    env_file:
+      - .env
+    depends_on:
+      - postgresql
+      - redis
--- a/docs/examples/docker/idp/copyparty.conf
+++ b/docs/examples/docker/idp/copyparty.conf
@@ -26,38 +26,56 @@
  idp-h-usr: x-idp-user
  idp-h-grp: x-idp-group

+  # but copyparty will refuse to accept those headers unless you
+  # tell it the LAN IP of the reverse-proxy to expect them from,
+  # preventing malicious users from pretending to be the proxy;
+  # pay attention to the warning message in the logs and then
+  # adjust the following config option accordingly:
+  xff-src: 192.168.0.0/16
+
+  # or just allow all LAN / private IPs (probably good enough):
+  xff-src: lan
+
+  # an additional, optional security measure is to expect a
+  # secret header name from the reverse-proxy; you can enable
+  # this feature by setting the header-name to expect here:
+  #idp-h-key: shangala-bangala
+
+  # convenient debug option:
+  # log all incoming request headers from the proxy
+  #ihead: *

 [/]      # create a volume at "/" (the webroot), which will
  /w     # share /w (the docker data volume)
  accs:
    rw: *       # everyone gets read-access, but
-    rwmda: %su  # the group "su" gets read-write-move-delete-admin
+    rwmda: @su  # the group "su" gets read-write-move-delete-admin


 [/u/${u}]    # each user gets their own home-folder at /u/username
  /w/u/${u}  # which will be "u/username" in the docker data volume
  accs:
    r: *              # read-access for anyone, and
-    rwmda: ${u}, %su  # read-write-move-delete-admin for that username + the "su" group
+    rwmda: ${u}, @su  # read-write-move-delete-admin for that username + the "su" group


 [/u/${u}/priv]    # each user also gets a private area at /u/username/priv
  /w/u/${u}/priv  # stored at DATAVOLUME/u/username/priv
  accs:
-    rwmda: ${u}, %su  # read-write-move-delete-admin for that username + the "su" group
+    rwmda: ${u}, @su  # read-write-move-delete-admin for that username + the "su" group


 [/lounge/${g}]    # each group gets their own shared volume
  /w/lounge/${g}  # stored at DATAVOLUME/lounge/groupname
  accs:
    r: *               # read-access for anyone, and
-    rwmda: %${g}, %su  # read-write-move-delete-admin for that group + the "su" group
+    rwmda: @${g}, @su  # read-write-move-delete-admin for that group + the "su" group


 [/lounge/${g}/priv]    # and a private area for each group too
  /w/lounge/${g}/priv  # stored at DATAVOLUME/lounge/groupname/priv
  accs:
-    rwmda: %${g}, %su  # read-write-move-delete-admin for that group + the "su" group
+    rwmda: @${g}, @su  # read-write-move-delete-admin for that group + the "su" group


 # and create some strategic volumes to prevent anyone from gaining
@@ -65,8 +83,8 @@
 [/u]
  /w/u
  accs:
-    rwmda: %su
+    rwmda: @su
 [/lounge]
  /w/lounge
  accs:
-    rwmda: %su
+    rwmda: @su
--- a/docs/examples/windows.md
+++ b/docs/examples/windows.md
@@ -6,7 +6,7 @@ you will definitely need either [copyparty.exe](https://github.com/9001/copypart

 * if you decided to grab `copyparty-sfx.py` instead of the exe you will also need to install the ["Latest Python 3 Release"](https://www.python.org/downloads/windows/)

-then you probably want to download [FFmpeg](https://github.com/BtbN/FFmpeg-Builds/releases/download/latest/ffmpeg-master-latest-win64-gpl.zip) and put `ffmpeg.exe` and `ffprobe.exe` in your PATH (so for example `C:\Windows\System32\`) -- this enables thumbnails, audio transcoding, and making music metadata searchable
+then you probably want to download [FFmpeg](https://www.gyan.dev/ffmpeg/builds/ffmpeg-git-full.7z) and put `ffmpeg.exe` and `ffprobe.exe` in your PATH (so for example `C:\Windows\System32\`) -- this enables thumbnails, audio transcoding, and making music metadata searchable


 ## the config file
--- a/docs/idp.md
+++ b/docs/idp.md
@@ -0,0 +1,7 @@
+there is a [docker-compose example](./examples/docker/idp-authelia-traefik) which is hopefully a good starting point (meaning you can skip the steps below) -- but if you want to set this up from scratch yourself (or learn about how it works), keep reading:
+
+to configure IdP from scratch, you must place copyparty behind a reverse-proxy which sends all requests through a middleware (the IdP / identity-provider service) which will inject a set of headers into the requests, telling copyparty who the user is
+
+in the copyparty `[global]` config, specify which headers to read client info from; username is required (`idp-h-usr: X-Authooley-User`), group(s) are optional (`idp-h-grp: X-Authooley-Groups`)
+
+* it is also required to specify the subnet that legit requests will be coming from, for example `--xff-src=10.88.0.0/24` to allow 10.88.x.x (or `--xff-src=lan` for all private IPs), and it is recommended to configure the reverseproxy to include a secret header as proof that the other headers are also legit (and not smuggled in by a malicious client), telling copyparty the headername to expect with `idp-h-key: shangala-bangala`
--- a/docs/lics.txt
+++ b/docs/lics.txt
@@ -24,6 +24,10 @@ https://github.com/giampaolo/pyftpdlib/
 C: 2007 Giampaolo Rodola
 L: MIT

+https://github.com/9001/partftpy
+C: 2010-2021 Michael P. Soulier
+L: MIT
+
 https://github.com/nayuki/QR-Code-generator/
 C: Project Nayuki
 L: MIT
--- a/docs/notes.md
+++ b/docs/notes.md
@@ -1,3 +1,19 @@
+this file accidentally got committed at some point, so let's put it to use
+
+# trivia / lore
+
+copyparty started as [three separate php projects](https://a.ocv.me/pub/stuff/old-php-projects/); an nginx custom directory listing (which became a php script), and a php music/picture viewer, and an additional php project for resumable uploads:
+
+* findex -- directory browser / gallery with thumbnails and a music player which sometime back in 2009 had a canvas visualizer grabbing fft data from a flash audio player
+* findex.mini -- plain-listing fork of findex with streaming zip-download of folders (the js and design should look familiar)
+* upper and up2k -- up2k being the star of the show and where copyparty's chunked resumable uploads came from
+
+the first link has screenshots but if that doesn't work there's also a [tar here](https://ocv.me/dev/old-php-projects.tgz)
+
+----
+
+below this point is misc useless scribbles
+
 # up2k.js

 ## potato detection
--- a/docs/notes.sh
+++ b/docs/notes.sh
@@ -24,6 +24,27 @@ gzip -d < .hist/up2k.snap | jq -r '.[].name' | while IFS= read -r f; do wc -c --
 echo; find -type f | while IFS= read -r x; do printf '\033[A\033[36m%s\033[K\033[0m\n' "$x"; tail -c$((1024*1024)) <"$x" | xxd -a | awk 'NR==1&&/^[0: ]+.{16}$/{next} NR==2&&/^\*$/{next} NR==3&&/^[0f]+: [0 ]+65 +.{16}$/{next} {e=1} END {exit e}' || continue; printf '\033[A\033[31msus:\033[33m %s \033[0m\n\n' "$x"; done


+##
+## sync pics/vids from phone
+##  (takes all files named (IMG|PXL|PANORAMA|Screenshot)_20231224_*)
+
+cd /storage/emulated/0/DCIM/Camera
+find -mindepth 1 -maxdepth 1 | sort | cut -c3- > ls
+url=https://192.168.1.3:3923/rw/pics/Camera/$d/; awk -F_ '!/^[A-Z][A-Za-z]{1,16}_[0-9]{8}[_-]/{next} {d=substr($2,1,6)} !t[d]++{print d}' ls | while read d; do grep -E "^[A-Z][A-Za-z]{1,16}_$d" ls | tr '\n' '\0' | xargs -0 python3 ~/dev/copyparty/bin/u2c.py -td $url --; done
+
+
+##
+## convert symlinks to hardlinks (probably safe, no guarantees)
+
+find -type l | while IFS= read -r lnk; do [ -h "$lnk" ] || { printf 'nonlink: %s\n' "$lnk"; continue; }; dst="$(readlink -f -- "$lnk")"; [ -e "$dst" ] || { printf '???\n%s\n%s\n' "$lnk" "$dst"; continue; }; printf 'relinking:\n  %s\n  %s\n' "$lnk" "$dst"; rm -- "$lnk"; ln -- "$dst" "$lnk"; done 
+
+
+##
+## convert hardlinks to symlinks (maybe not as safe? use with caution)
+
+e=; p=; find -printf '%i %p\n' | awk '{i=$1;sub(/[^ ]+ /,"")} !n[i]++{p[i]=$0;next} {printf "real %s\nlink %s\n",p[i],$0}' | while read cls p; do [ -e "$p" ] || e=1; p="$(realpath -- "$p")" || e=1; [ -e "$p" ] || e=1; [ $cls = real ] && { real="$p"; continue; }; [ $cls = link ] || e=1; [ "$p" ] || e=1; [ $e ] && { echo "ERROR $p"; break; }; printf '\033[36m%s \033[0m -> \033[35m%s\033[0m\n' "$p" "$real"; rm "$p"; ln -s "$real" "$p" || { echo LINK FAILED; break; }; done
+
+
 ##
 ## create a test payload

--- a/docs/rice/README.md
+++ b/docs/rice/README.md
@@ -0,0 +1,49 @@
+# custom fonts
+
+to change the fonts in the web-UI,  first save the following text (the default font-config) to a new css file, for example named `customfonts.css` in your webroot:
+
+```css
+:root {
+	--font-main: sans-serif;
+	--font-serif: serif;
+	--font-mono: 'scp';
+}
+```
+
+add this to your copyparty config so the css file gets loaded: `--html-head='<link rel="stylesheet" href="/customfonts.css">'`
+
+alternatively, if you are using a config file instead of commandline args:
+
+```yaml
+[global]
+  html-head: <link rel="stylesheet" href="/customfonts.css">
+```
+
+restart copyparty for the config change to take effect
+
+edit the css file you made and press `ctrl`-`shift`-`R` in the browser to see the changes as you go (no need to restart copyparty for each change)
+
+if you are introducing a new ttf/woff font, don't forget to declare the font itself in the css file; here's one of the default fonts from `ui.css`:
+
+```css
+@font-face {
+	font-family: 'scp';
+	font-display: swap;
+	src: local('Source Code Pro Regular'), local('SourceCodePro-Regular'), url(deps/scp.woff2) format('woff2');
+}
+```
+
+and because textboxes don't inherit fonts by default, you can force it like this:
+
+```css
+input[type=text], input[type=submit], input[type=button] { font-family: var(--font-main) }
+```
+
+and if you want to have a monospace font in the fancy markdown editor, do this:
+
+```css
+.EasyMDEContainer .CodeMirror { font-family: var(--font-mono) }
+```
+
+NB: `<textarea id="mt">` and `<div id="mtr">` in the regular markdown editor must have the same font; none of the suggestions above will cause any issues but keep it in mind if you're getting creative
+
--- a/docs/versus.md
+++ b/docs/versus.md
@@ -200,9 +200,10 @@ symbol legend,
 | ----------------------- | - | - | - | - | - | - | - | - | - | - | - | - |
 | serve https             | █ |   | █ | █ | █ | █ | █ | █ | █ | █ | █ | █ |
 | serve webdav            | █ |   |   | █ | █ | █ | █ |   | █ |   |   | █ |
-| serve ftp               | █ |   |   |   |   | █ |   |   |   |   |   | █ |
-| serve ftps              | █ |   |   |   |   | █ |   |   |   |   |   | █ |
-| serve sftp              |   |   |   |   |   | █ |   |   |   |   |   | █ |
+| serve ftp  (tcp)        | █ |   |   |   |   | █ |   |   |   |   |   | █ |
+| serve ftps (tls)        | █ |   |   |   |   | █ |   |   |   |   |   | █ |
+| serve tftp (udp)        | █ |   |   |   |   |   |   |   |   |   |   |   |
+| serve sftp (ssh)        |   |   |   |   |   | █ |   |   |   |   |   | █ |
 | serve smb/cifs          | ╱ |   |   |   |   | █ |   |   |   |   |   |   |
 | serve dlna              |   |   |   |   |   | █ |   |   |   |   |   |   |
 | listen on unix-socket   |   |   |   | █ | █ |   | █ | █ | █ |   | █ | █ |
@@ -247,9 +248,9 @@ symbol legend,
 | ----------------------- | - | - | - | - | - | - | - | - | - | - | - | - |
 | accounts                | █ | █ | █ | █ | █ | █ | █ | █ | █ | █ | █ | █ |
 | per-account chroot      |   |   |   |   |   |   |   |   |   |   |   | █ |
-| single-sign-on          |   |   |   | █ | █ |   |   |   | • |   |   |   |
-| token auth              |   |   |   | █ | █ |   |   | █ |   |   |   |   |
-| 2fa                     |   |   |   | █ | █ |   |   |   |   |   |   | █ |
+| single-sign-on          | ╱ |   |   | █ | █ |   |   |   | • |   |   |   |
+| token auth              | ╱ |   |   | █ | █ |   |   | █ |   |   |   |   |
+| 2fa                     | ╱ |   |   | █ | █ |   |   |   |   |   |   | █ |
 | per-volume permissions  | █ | █ | █ | █ | █ | █ | █ |   | █ | █ | ╱ | █ |
 | per-folder permissions  | ╱ |   |   | █ | █ |   | █ |   | █ | █ | ╱ | █ |
 | per-file permissions    |   |   |   | █ | █ |   | █ |   | █ |   |   |   |
@@ -288,6 +289,7 @@ symbol legend,
 * `curl-friendly ls` = returns a [sortable plaintext folder listing](https://user-images.githubusercontent.com/241032/215322619-ea5fd606-3654-40ad-94ee-2bc058647bb2.png) when curled
 * `curl-friendly upload` = uploading with curl is just `curl -T some.bin http://.../`
 * `a`/copyparty remarks:
+  * single-sign-on, token-auth, and 2fa is *possible* through authelia/authentik or similar, but nobody's made an example yet
  * one-way folder sync from local to server can be done efficiently with [u2c.py](https://github.com/9001/copyparty/tree/hovudstraum/bin#u2cpy), or with webdav and conventional rsync
  * can hot-reload config files (with just a few exceptions)
  * can set per-folder permissions if that folder is made into a separate volume, so there is configuration overhead
--- a/pyproject.toml
+++ b/pyproject.toml
@@ -28,6 +28,7 @@ classifiers = [
    "Programming Language :: Python :: Implementation :: CPython",
    "Programming Language :: Python :: Implementation :: Jython",
    "Programming Language :: Python :: Implementation :: PyPy",
+    "Operating System :: OS Independent",
    "Environment :: Console",
    "Environment :: No Input/Output (Daemon)",
    "Intended Audience :: End Users/Desktop",
@@ -48,6 +49,7 @@ thumbnails2 = ["pyvips"]
 audiotags = ["mutagen"]
 ftpd = ["pyftpdlib"]
 ftps = ["pyftpdlib", "pyopenssl"]
+tftpd = ["partftpy>=0.3.1"]
 pwhash = ["argon2-cffi"]

 [project.scripts]
--- a/scripts/deps-docker/Dockerfile
+++ b/scripts/deps-docker/Dockerfile
@@ -1,11 +1,11 @@
 FROM    alpine:3.18
 WORKDIR /z
 ENV     ver_asmcrypto=c72492f4a66e17a0e5dd8ad7874de354f3ccdaa5 \
-        ver_hashwasm=4.9.0 \
+        ver_hashwasm=4.10.0 \
        ver_marked=4.3.0 \
-        ver_dompf=3.0.5 \
+        ver_dompf=3.0.9 \
        ver_mde=2.18.0 \
-        ver_codemirror=5.65.12 \
+        ver_codemirror=5.65.16 \
        ver_fontawesome=5.13.0 \
        ver_prism=1.29.0 \
        ver_zopfli=1.0.3
@@ -24,7 +24,7 @@ ENV     ver_asmcrypto=c72492f4a66e17a0e5dd8ad7874de354f3ccdaa5 \
 # the scp url is regular latin from https://fonts.googleapis.com/css2?family=Source+Code+Pro&display=swap
 RUN     mkdir -p /z/dist/no-pk \
        && wget https://fonts.gstatic.com/s/sourcecodepro/v11/HI_SiYsKILxRpg3hIP6sJ7fM7PqlPevW.woff2 -O scp.woff2 \
-        && apk add cmake make g++ git bash npm patch wget tar pigz brotli gzip unzip python3 python3-dev brotli py3-brotli \
+        && apk add cmake make g++ git bash npm patch wget tar pigz brotli gzip unzip python3 python3-dev py3-brotli \
        && rm -f /usr/lib/python3*/EXTERNALLY-MANAGED \
        && wget https://github.com/openpgpjs/asmcrypto.js/archive/$ver_asmcrypto.tar.gz -O asmcrypto.tgz \
        && wget https://github.com/markedjs/marked/archive/v$ver_marked.tar.gz -O marked.tgz \
@@ -80,7 +80,7 @@ RUN     cd asmcrypto.js-$ver_asmcrypto \


 # build hash-wasm
-RUN     cd hash-wasm \
+RUN     cd hash-wasm/dist \
        && mv sha512.umd.min.js /z/dist/sha512.hw.js


@@ -143,9 +143,8 @@ RUN     ./genprism.sh $ver_prism


 # compress
-COPY    brotli.makefile zopfli.makefile /z/dist/
+COPY    zopfli.makefile /z/dist/
 RUN     cd /z/dist \
-        && make -j$(nproc) -f brotli.makefile \
        && make -j$(nproc) -f zopfli.makefile \
        && rm *.makefile \
        && mv no-pk/* . \
--- a/scripts/deps-docker/brotli.makefile
+++ b/scripts/deps-docker/brotli.makefile
@@ -1,4 +0,0 @@
-all: $(addsuffix .br, $(wildcard easymde*))
-
-%.br: %
-	brotli -jZ $<
--- a/scripts/deps-docker/zopfli.makefile
+++ b/scripts/deps-docker/zopfli.makefile
@@ -1,6 +1,6 @@
 all: $(addsuffix .gz, $(wildcard *.js *.css))

 %.gz: %
-	pigz -11 -I 573 $<
+	pigz -11 -I 2048 $<

 # pigz -11 -J 34 -I 100 -F < $< > $@.first
--- a/scripts/docker/README.md
+++ b/scripts/docker/README.md
@@ -33,6 +33,8 @@ the recommended way to configure copyparty inside a container is to mount a fold
 * but you can also provide arguments to the docker command if you prefer that
 * config files must be named `something.conf` to get picked up

+also see [docker-specific recommendations](#docker-specific-recommendations)
+

 ## editions

@@ -79,6 +81,35 @@ or using commandline arguments,
 ```


+# faq
+
+the following advice is best-effort and not guaranteed to be entirely correct
+
+* q: starting a rootless container on debian 12 fails with `failed to register layer: lsetxattr user.overlay.impure /etc: operation not supported`
+  * a: docker's default rootless configuration on debian is to use the overlay2 storage driver; this does not work. Your options are to replace docker with podman (good choice), or to configure docker to use the `fuse-overlayfs` storage driver
+
+
+
+# docker-specific recommendations
+
+* copyparty will generally create a `.hist` folder at the top of each volume, which contains the filesystem index, thumbnails and such. For performance reasons, but also just to keep things tidy, it might be convenient to store these inside the config folder instead. Add the line `hist: /cfg/hists/` inside the `[global]` section of your `copyparty.conf` to do this
+
+
+## enabling the ftp server
+
+...is tricky because ftp is a weird protocol and docker is making it worse 🎉
+
+add the following three config entries into the `[global]` section of your `copyparty.conf`:
+
+* `ftp: 3921` to enable the service, listening for connections on port 3921
+
+* `ftp-nat: 127.0.0.1` but replace `127.0.0.1` with the actual external IP of your server; the clients will only be able to connect to this IP, even if the server has multiple IPs
+
+* `ftp-pr: 12000-12099` to restrict the [passive-mode](http://slacksite.com/other/ftp.html#passive) port selection range; this allows up to 100 simultaneous file transfers
+
+then finally update your docker config so that the port-range you specified (12000-12099) is exposed to the internet
+
+
 # build the images yourself

 basically `./make.sh hclean pull img push` but see [devnotes.md](./devnotes.md)
--- a/scripts/make-pypi-release.sh
+++ b/scripts/make-pypi-release.sh
@@ -77,13 +77,14 @@ function have() {
 }

 function load_env() {
-	. buildenv/bin/activate
-	have setuptools
-	have wheel
-	have build
-	have twine
-	have jinja2
-	have strip_hints
+	. buildenv/bin/activate || return 1
+	have setuptools &&
+	have wheel &&
+	have build &&
+	have twine &&
+	have jinja2 &&
+	have strip_hints &&
+	return 0 || return 1
 }

 load_env || {
--- a/scripts/make-sfx.sh
+++ b/scripts/make-sfx.sh
@@ -26,8 +26,9 @@ help() { exec cat <<'EOF'
 # _____________________________________________________________________
 # core features:
 #
-# `no-ftp` saves ~33k by removing the ftp server and filetype detector,
-#   disabling --ftpd and --magic
+# `no-ftp` saves ~30k by removing the ftp server, disabling --ftp
+#
+# `no-tfp` saves ~10k by removing the tftp server, disabling --tftp
 #
 # `no-smb` saves ~3.5k by removing the smb / cifs server
 #
@@ -36,7 +37,7 @@ help() { exec cat <<'EOF'
 # _____________________________________________________________________
 # web features:
 #
-# `no-cm` saves ~82k by removing easymde/codemirror
+# `no-cm` saves ~89k by removing easymde/codemirror
 #   (the fancy markdown editor)
 #
 # `no-hl` saves ~41k by removing syntax hilighting in the text viewer
@@ -114,6 +115,7 @@ while [ ! -z "$1" ]; do
 		gz)     use_gz=1 ; ;;
 		gzz)    shift;use_gzz=$1;use_gz=1; ;;
 		no-ftp) no_ftp=1 ; ;;
+		no-tfp) no_tfp=1 ; ;;
 		no-smb) no_smb=1 ; ;;
 		no-zm)  no_zm=1  ; ;;
 		no-fnt) no_fnt=1 ; ;;
@@ -165,7 +167,8 @@ necho() {
 [ $repack ] && {
 	old="$tmpdir/pe-copyparty.$(id -u)"
 	echo "repack of files in $old"
-	cp -pR "$old/"*{py2,py37,j2,copyparty} .
+	cp -pR "$old/"*{py2,py37,magic,j2,copyparty} .
+	cp -pR "$old/"*partftpy . || true
 	cp -pR "$old/"*ftp . || true
 }

@@ -221,6 +224,16 @@ necho() {
 	mkdir ftp/
 	mv pyftpdlib ftp/

+	necho collecting partftpy
+	f="../build/partftpy-0.3.1.tar.gz"
+	[ -e "$f" ] ||
+		(url=https://files.pythonhosted.org/packages/37/79/1a1de1d3fdf27ddc9c2d55fec6552e7b8ed115258fedac6120679898b83d/partftpy-0.3.1.tar.gz;
+		wget -O$f "$url" || curl -L "$url" >$f)
+
+	tar -zxf $f
+	mv partftpy-*/partftpy .
+	rm -rf partftpy-* partftpy/bin
+
 	necho collecting python-magic
 	v=0.4.27
 	f="../build/python-magic-$v.tar.gz"
@@ -234,7 +247,6 @@ necho() {
 	rm -rf python-magic-*
 	rm magic/compat.py
 	iawk '/^def _add_compat/{o=1} !o; /^_add_compat/{o=0}' magic/__init__.py
-	mv magic ftp/  # doesn't provide a version label anyways

 	# enable this to dynamically remove type hints at startup,
 	# in case a future python version can use them for performance
@@ -394,7 +406,7 @@ find -type f -name ._\* | while IFS= read -r f; do cmp <(printf '\x00\x05\x16')

 rm -f copyparty/web/deps/*.full.* copyparty/web/dbg-* copyparty/web/Makefile

-find copyparty | LC_ALL=C sort | sed -r 's/\.(gz|br)$//;s/$/,/' > have
+find copyparty | LC_ALL=C sort | sed -r 's/\.gz$//;s/$/,/' > have
 cat have | while IFS= read -r x; do
 	grep -qF -- "$x" ../scripts/sfx.ls || {
 		echo "unexpected file: $x"
@@ -409,8 +421,10 @@ iawk '/^ {0,4}[^ ]/{s=0}/^ {4}def (serve_forever|_loop)/{s=1}!s' ftp/pyftpdlib/s
 rm -f ftp/pyftpdlib/{__main__,prefork}.py

 [ $no_ftp ] &&
-	rm -rf copyparty/ftpd.py ftp &&
-	sed -ri '/\.ftp/d' copyparty/svchub.py
+	rm -rf copyparty/ftpd.py ftp
+
+[ $no_tfp ] &&
+	rm -rf copyparty/tftpd.py partftpy

 [ $no_smb ] &&
 	rm -f copyparty/smbd.py
@@ -584,12 +598,12 @@ nf=$(ls -1 "$zdir"/arc.* 2>/dev/null | wc -l)


 echo gen tarlist
-for d in copyparty j2 py2 py37 ftp; do find $d -type f; done |  # strip_hints
+for d in copyparty partftpy magic j2 py2 py37 ftp; do find $d -type f || true; done |  # strip_hints
 sed -r 's/(.*)\.(.*)/\2 \1/' | LC_ALL=C sort |
 sed -r 's/([^ ]*) (.*)/\2.\1/' | grep -vE '/list1?$' > list1

 for n in {1..50}; do
-	(grep -vE '\.(gz|br)$' list1; grep -E '\.(gz|br)$' list1 | (shuf||gshuf) ) >list || true
+	(grep -vE '\.gz$' list1; grep -E '\.gz$' list1 | (shuf||gshuf) ) >list || true
 	s=$( (sha1sum||shasum) < list | cut -c-16)
 	grep -q $s "$zdir/h" 2>/dev/null && continue
 	echo $s >> "$zdir/h"
--- a/scripts/pyinstaller/build.sh
+++ b/scripts/pyinstaller/build.sh
@@ -37,7 +37,7 @@ rm -rf $TEMP/pe-copyparty*
 python copyparty-sfx.py --version

 rm -rf mods; mkdir mods
-cp -pR $TEMP/pe-copyparty/copyparty/ $TEMP/pe-copyparty/{ftp,j2}/* mods/
+cp -pR $TEMP/pe-copyparty/{copyparty,partftpy}/ $TEMP/pe-copyparty/{ftp,j2}/* mods/
 [ $w10 ] && rm -rf mods/{jinja2,markupsafe}

 af() { awk "$1" <$2 >tf; mv tf "$2"; }
--- a/scripts/pyinstaller/deps.sha512
+++ b/scripts/pyinstaller/deps.sha512
@@ -1,13 +1,10 @@
 f117016b1e6a7d7e745db30d3e67f1acf7957c443a0dd301b6c5e10b8368f2aa4db6be9782d2d3f84beadd139bfeef4982e40f21ca5d9065cb794eeb0e473e82  altgraph-0.17.4-py2.py3-none-any.whl
 eda6c38fc4d813fee897e969ff9ecc5acc613df755ae63df0392217bbd67408b5c1f6c676f2bf5497b772a3eb4e1a360e1245e1c16ee83f0af555f1ab82c3977  Git-2.39.1-32-bit.exe
 17ce52ba50692a9d964f57a23ac163fb74c77fdeb2ca988a6d439ae1fe91955ff43730c073af97a7b3223093ffea3479a996b9b50ee7fba0869247a56f74baa6  pefile-2023.2.7-py3-none-any.whl
-f298e34356b5590dde7477d7b3a88ad39c622a2bcf3fcd7c53870ce8384dd510f690af81b8f42e121a22d3968a767d2e07595036b2ed7049c8ef4d112bcf3a61  pyinstaller-5.13.2-py3-none-win32.whl
-f23615c522ed58b9a05978ba4c69c06224590f3a6adbd8e89b31838b181a57160739ceff1fc2ba6f4239b8fee46f92ce02910b2debda2710558ed42cff1ce3f1  pyinstaller-6.1.0-py3-none-win_amd64.whl
-5747b3b119629c4cf956f0eaa85f29218bb3680d3a4a262fa6e976e56b35067302e153d2c0a001505f2cb642b1f78752567889b3b82e342d6cd29aac8b70e92e  pyinstaller_hooks_contrib-2023.10-py2.py3-none-any.whl
+126ca016c00256f4ff13c88707ead21b3b98f3c665ae57a5bcbb80c8be3004bff36d9c7f9a1cc9d20551019708f2b195154f302d80a1e5a2026d6d0fe9f3d5f4  pyinstaller_hooks_contrib-2024.3-py2.py3-none-any.whl
 749a473646c6d4c7939989649733d4c7699fd1c359c27046bf5bc9c070d1a4b8b986bbc65f60d7da725baf16dbfdd75a4c2f5bb8335f2cb5685073f5fee5c2d1  pywin32_ctypes-0.2.2-py3-none-any.whl
 6e0d854040baff861e1647d2bece7d090bc793b2bd9819c56105b94090df54881a6a9b43ebd82578cd7c76d47181571b671e60672afd9def389d03c9dae84fcf  setuptools-68.2.2-py3-none-any.whl
 3c5adf0a36516d284a2ede363051edc1bcc9df925c5a8a9fa2e03cab579dd8d847fdad42f7fd5ba35992e08234c97d2dbfec40a9d12eec61c8dc03758f2bd88e  typing_extensions-4.4.0-py3-none-any.whl
-8d16a967a0a7872a7575b1005cf66915deacda6ee8611fbb52f42fc3e3beb2f901a5140c942a5d146bd412b92bfa9cbadd82beeba83df6d70930c6dc26608a5b  upx-4.1.0-win32.zip
 # u2c (win7)
 f3390290b896019b2fa169932390e4930d1c03c014e1f6db2405ca2eb1f51f5f5213f725885853805b742997b0edb369787e5c0069d217bc4e8b957f847f58b6  certifi-2023.11.17-py3-none-any.whl
 904eb57b13bea80aea861de86987e618665d37fa9ea0856e0125a9ba767a53e5064de0b9c4735435a2ddf4f16f7f7d2c75a682e1de83d9f57922bdca8e29988c  charset_normalizer-3.3.0-cp37-cp37m-win32.whl
@@ -18,15 +15,19 @@ b795abb26ba2f04f1afcfb196f21f638014b26c8186f8f488f1c2d91e8e0220962fbd259dbc9c387
 91c025f7d94bcdf93df838fab67053165a414fc84e8496f92ecbb910dd55f6b6af5e360bbd051444066880c5a6877e75157bd95e150ead46e5c605930dfc50f2  future-0.18.2.tar.gz
 c06b3295d1d0b0f0a6f9a6cd0be861b9b643b4a5ea37857f0bd41c45deaf27bb927b71922dab74e633e43d75d04a9bd0d1c4ad875569740b0f2a98dd2bfa5113  importlib_metadata-5.0.0-py3-none-any.whl
 016a8cbd09384f1a9a44cb0e8274df75a8bcb2f3966bb5d708c62145289efaa5db98f75256c97e4f8046735ce2e529fbb076f284a46cdb716e89a75660200ad9  pip-23.2.1-py3-none-any.whl
+f298e34356b5590dde7477d7b3a88ad39c622a2bcf3fcd7c53870ce8384dd510f690af81b8f42e121a22d3968a767d2e07595036b2ed7049c8ef4d112bcf3a61  pyinstaller-5.13.2-py3-none-win32.whl
 6bb73cc2db795c59c92f2115727f5c173cacc9465af7710db9ff2f2aec2d73130d0992d0f16dcb3fac222dc15c0916562d0813b2337401022020673a4461df3d  python-3.7.9-amd64.exe
 500747651c87f59f2436c5ab91207b5b657856e43d10083f3ce27efb196a2580fadd199a4209519b409920c562aaaa7dcbdfb83ed2072a43eaccae6e2d056f31  python-3.7.9.exe
+2e04acff170ca3bbceeeb18489c687126c951ec0bfd53cccfb389ba8d29a4576c1a9e8f2e5ea26c84dd21bfa2912f4e71fa72c1e2653b71e34afc0e65f1722d4  upx-4.2.2-win32.zip
 68e1b618d988be56aaae4e2eb92bc0093627a00441c1074ebe680c41aa98a6161e52733ad0c59888c643a33fe56884e4f935178b2557fbbdd105e92e0d993df6  windows6.1-kb2533623-x64.msu
 479a63e14586ab2f2228208116fc149ed8ee7b1e4ff360754f5bda4bf765c61af2e04b5ef123976623d04df4976b7886e0445647269da81436bd0a7b5671d361  windows6.1-kb2533623-x86.msu
 ba91ab0518c61eff13e5612d9e6b532940813f6b56e6ed81ea6c7c4d45acee4d98136a383a25067512b8f75538c67c987cf3944bfa0229e3cb677e2fb81e763e  zipp-3.10.0-py3-none-any.whl
 # win10
-00558cca2e0ac813d404252f6e5aeacb50546822ecb5d0570228b8ddd29d94e059fbeb6b90393dee5abcddaca1370aca784dc9b095cbb74e980b3c024767fb24  Jinja2-3.1.2-py3-none-any.whl
-7f8f4daa4f4f2dbf24cdd534b2952ee3fba6334eb42b37465ccda3aa1cccc3d6204aa6bfffb8a83bf42ec59c702b5b5247d4c8ee0d4df906334ae53072ef8c4c  MarkupSafe-2.1.3-cp311-cp311-win_amd64.whl
+e3e2e6bd511dec484dd0292f4c46c55c88a885eabf15413d53edea2dd4a4dbae1571735b9424f78c0cd7f1082476a8259f31fd3f63990f726175470f636df2b3  Jinja2-3.1.3-py3-none-any.whl
+e21495f1d473d855103fb4a243095b498ec90eb68776b0f9b48e994990534f7286c0292448e129c507e5d70409f8a05cca58b98d59ce2a815993d0a873dfc480  MarkupSafe-2.1.5-cp311-cp311-win_amd64.whl
 8a6e2b13a2ec4ef914a5d62aad3db6464d45e525a82e07f6051ed10474eae959069e165dba011aefb8207cdfd55391d73d6f06362c7eb247b08763106709526e  mutagen-1.47.0-py3-none-any.whl
 656015f5cc2c04aa0653ee5609c39a7e5f0b6a58c84fe26b20bd070c52d20b4effb810132f7fb771168483e9fd975cc3302837dd7a1a687ee058b0460c857cc4  packaging-23.2-py3-none-any.whl
-6401616fdfdd720d1aaa9a0ed1398d00664b28b6d84517dff8d1f9c416452610c6afa64cfb012a78e61d1cf4f6d0784eca6e7610957859e511f15bc6f3b3bd53  Pillow-10.1.0-cp311-cp311-win_amd64.whl
-2e6a57bab45b5a825a2073780c73980cbf5aafd99dc3b28660ea3f5f658f04668cd0f01c7de0bb79e362ff4e3b8f01dd4f671d3a2e054d3071baefdcf0b0e4ba  python-3.11.7-amd64.exe
+424e20dc7263a31d524307bc39ed755a9dd82f538086fff68d98dd97e236c9b00777a8ac2e3853081b532b0e93cef44983e74d0ab274877440e8b7341b19358a  pillow-10.2.0-cp311-cp311-win_amd64.whl
+8760eab271e79256ae3bfb4af8ccc59010cb5d2eccdd74b325d1a533ae25eb127d51c2ec28ff90d449afed32dd7d6af62934fe9caaf1ae1f4d4831e948e912da  pyinstaller-6.5.0-py3-none-win_amd64.whl
+e6bdbae1affd161e62fc87407c912462dfe875f535ba9f344d0c4ade13715c947cd3ae832eff60f1bad4161938311d06ac8bc9b52ef203f7b0d9de1409f052a5  python-3.11.8-amd64.exe
+729dc52f1a02bc6274d012ce33f534102975a828cba11f6029600ea40e2d23aefeb07bf4ae19f9621d0565dd03eb2635bbb97d45fb692c1f756315e8c86c5255  upx-4.2.2-win64.zip
--- a/scripts/pyinstaller/notes.txt
+++ b/scripts/pyinstaller/notes.txt
@@ -17,19 +17,19 @@ uname -s | grep NT-10 && w10=1 || {
 fns=(
  altgraph-0.17.4-py2.py3-none-any.whl
  pefile-2023.2.7-py3-none-any.whl
-  pyinstaller_hooks_contrib-2023.10-py2.py3-none-any.whl
+  pyinstaller_hooks_contrib-2024.3-py2.py3-none-any.whl
  pywin32_ctypes-0.2.2-py3-none-any.whl
  setuptools-68.2.2-py3-none-any.whl
-  upx-4.1.0-win32.zip
 )
 [ $w10 ] && fns+=(
-  pyinstaller-6.1.0-py3-none-win_amd64.whl
-  Jinja2-3.1.2-py3-none-any.whl
-  MarkupSafe-2.1.3-cp311-cp311-win_amd64.whl
+  pyinstaller-6.5.0-py3-none-win_amd64.whl
+  Jinja2-3.1.3-py3-none-any.whl
+  MarkupSafe-2.1.5-cp311-cp311-win_amd64.whl
  mutagen-1.47.0-py3-none-any.whl
  packaging-23.2-py3-none-any.whl
-  Pillow-10.1.0-cp311-cp311-win_amd64.whl
-  python-3.11.7-amd64.exe
+  pillow-10.2.0-cp311-cp311-win_amd64.whl
+  python-3.11.8-amd64.exe
+  upx-4.2.2-win64.zip
 )
 [ $w7 ] && fns+=(
  pyinstaller-5.13.2-py3-none-win32.whl
@@ -38,6 +38,7 @@ fns=(
  idna-3.4-py3-none-any.whl
  requests-2.28.2-py3-none-any.whl
  urllib3-1.26.14-py2.py3-none-any.whl
+  upx-4.2.2-win32.zip
 )
 [ $w7 ] && fns+=(
  future-0.18.2.tar.gz
--- a/scripts/sfx.ls
+++ b/scripts/sfx.ls
@@ -54,6 +54,7 @@ copyparty/sutil.py,
 copyparty/svchub.py,
 copyparty/szip.py,
 copyparty/tcpsrv.py,
+copyparty/tftpd.py,
 copyparty/th_cli.py,
 copyparty/th_srv.py,
 copyparty/u2idx.py,
--- a/scripts/test/tftp.sh
+++ b/scripts/test/tftp.sh
@@ -0,0 +1,36 @@
+#!/bin/bash
+set -ex
+
+# PYTHONPATH=.:~/dev/partftpy/ taskset -c 0 python3 -m copyparty -v srv::r -v srv/junk:junk:A --tftp 3969 
+
+get_src=~/dev/copyparty/srv/palette.flac
+get_fn=${get_src##*/}
+
+put_src=~/Downloads/102.zip
+put_dst=~/dev/copyparty/srv/junk/102.zip
+
+cd /dev/shm
+
+echo curl get 1428 v4; curl --tftp-blksize 1428 tftp://127.0.0.1:3969/$get_fn | cmp $get_src || exit 1
+echo curl get 1428 v6; curl --tftp-blksize 1428 tftp://[::1]:3969/$get_fn | cmp $get_src || exit 1
+
+echo curl put 1428 v4; rm -f $put_dst && curl --tftp-blksize 1428 -T $put_src tftp://127.0.0.1:3969/junk/ && cmp $put_src $put_dst || exit 1
+echo curl put 1428 v6; rm -f $put_dst && curl --tftp-blksize 1428 -T $put_src tftp://[::1]:3969/junk/ && cmp $put_src $put_dst || exit 1
+
+echo atftp get 1428; rm -f $get_fn && ~/src/atftp/atftp --option "blksize 1428" -g -r $get_fn 127.0.0.1 3969 && cmp $get_fn $get_src || exit 1
+
+echo atftp put 1428; rm -f $put_dst && ~/src/atftp/atftp --option "blksize 1428" 127.0.0.1 3969 -p -l $put_src -r junk/102.zip && cmp $put_src $put_dst || exit 1
+
+echo tftp-hpa get; rm -f $put_dst && tftp -v -m binary 127.0.0.1 3969 -c get $get_fn && cmp $get_src $get_fn || exit 1
+
+echo tftp-hpa put; rm -f $put_dst && tftp -v -m binary 127.0.0.1 3969 -c put $put_src junk/102.zip && cmp $put_src $put_dst || exit 1
+
+echo curl get 512; curl tftp://127.0.0.1:3969/$get_fn | cmp $get_src || exit 1
+
+echo curl put 512; rm -f $put_dst && curl -T $put_src tftp://127.0.0.1:3969/junk/ && cmp $put_src $put_dst || exit 1
+
+echo atftp get 512; rm -f $get_fn && ~/src/atftp/atftp -g -r $get_fn 127.0.0.1 3969 && cmp $get_fn $get_src || exit 1
+
+echo atftp put 512; rm -f $put_dst && ~/src/atftp/atftp 127.0.0.1 3969 -p -l $put_src -r junk/102.zip && cmp $put_src $put_dst || exit 1
+
+echo nice
--- a/setup.py
+++ b/setup.py
@@ -84,7 +84,7 @@ args = {
    "version": about["__version__"],
    "description": (
        "Portable file server with accelerated resumable uploads, "
-        + "deduplication, WebDAV, FTP, zeroconf, media indexer, "
+        + "deduplication, WebDAV, FTP, TFTP, zeroconf, media indexer, "
        + "video thumbnails, audio transcoding, and write-only folders"
    ),
    "long_description": long_description,
@@ -111,6 +111,7 @@ args = {
        "Programming Language :: Python :: Implementation :: CPython",
        "Programming Language :: Python :: Implementation :: Jython",
        "Programming Language :: Python :: Implementation :: PyPy",
+        "Operating System :: OS Independent",
        "Environment :: Console",
        "Environment :: No Input/Output (Daemon)",
        "Intended Audience :: End Users/Desktop",
@@ -140,6 +141,7 @@ args = {
        "audiotags": ["mutagen"],
        "ftpd": ["pyftpdlib"],
        "ftps": ["pyftpdlib", "pyopenssl"],
+        "tftpd": ["partftpy>=0.3.1"],
        "pwhash": ["argon2-cffi"],
    },
    "entry_points": {"console_scripts": ["copyparty = copyparty.__main__:main"]},
--- a/tests/res/idp/1.conf
+++ b/tests/res/idp/1.conf
@@ -0,0 +1,17 @@
+# -*- mode: yaml -*-
+# vim: ft=yaml:
+
+[global]
+  idp-h-usr: x-idp-user
+  idp-h-grp: x-idp-group
+
+[accounts]
+  ua: pa
+
+[/]
+  /
+  accs:
+    r: ua
+
+[/vb]
+  /b
--- a/tests/res/idp/2.conf
+++ b/tests/res/idp/2.conf
@@ -0,0 +1,29 @@
+# -*- mode: yaml -*-
+# vim: ft=yaml:
+
+[global]
+  idp-h-usr: x-idp-user
+  idp-h-grp: x-idp-group
+
+[accounts]
+  ua: pa
+  ub: pb
+  uc: pc
+
+[groups]
+  ga: ua, ub
+
+[/]
+  /
+  accs:
+    r: @ga
+
+[/vb]
+  /b
+  accs:
+    r: @ga, ua
+
+[/vc]
+  /c
+  accs:
+    r: @ga, uc
--- a/tests/res/idp/3.conf
+++ b/tests/res/idp/3.conf
@@ -0,0 +1,16 @@
+# -*- mode: yaml -*-
+# vim: ft=yaml:
+
+[global]
+  idp-h-usr: x-idp-user
+  idp-h-grp: x-idp-group
+
+[/vu/${u}]
+  /
+  accs:
+    r: ${u}
+
+[/vg/${g}]
+  /b
+  accs:
+    r: @${g}
--- a/tests/res/idp/4.conf
+++ b/tests/res/idp/4.conf
@@ -0,0 +1,25 @@
+# -*- mode: yaml -*-
+# vim: ft=yaml:
+
+[global]
+  idp-h-usr: x-idp-user
+  idp-h-grp: x-idp-group
+
+[accounts]
+  ua: pa
+  ub: pb
+
+[/vu/${u}]
+  /u-${u}
+  accs:
+    r: ${u}
+
+[/vg/${g}1]
+  /g1-${g}
+  accs:
+    r: @${g}
+
+[/vg/${g}2]
+  /g2-${g}
+  accs:
+    r: @${g}, ua
--- a/tests/res/idp/5.conf
+++ b/tests/res/idp/5.conf
@@ -0,0 +1,21 @@
+# -*- mode: yaml -*-
+# vim: ft=yaml:
+
+[global]
+  idp-h-usr: x-idp-user
+  idp-h-grp: x-idp-group
+
+[/ga]
+  /ga
+  accs:
+    r: @ga
+
+[/gb]
+  /gb
+  accs:
+    r: @gb
+
+[/g]
+  /g
+  accs:
+    r: @ga, @gb
--- a/tests/test_dots.py
+++ b/tests/test_dots.py
@@ -11,8 +11,8 @@ import unittest

 from copyparty.authsrv import AuthSrv
 from copyparty.httpcli import HttpCli
-from copyparty.up2k import Up2k
 from copyparty.u2idx import U2idx
+from copyparty.up2k import Up2k
 from tests import util as tu
 from tests.util import Cfg

--- a/tests/test_idp.py
+++ b/tests/test_idp.py
@@ -0,0 +1,171 @@
+#!/usr/bin/env python3
+# coding: utf-8
+from __future__ import print_function, unicode_literals
+
+import json
+import os
+import unittest
+
+from copyparty.authsrv import AuthSrv
+from tests.util import Cfg
+
+
+class TestVFS(unittest.TestCase):
+    def dump(self, vfs):
+        print(json.dumps(vfs, indent=4, sort_keys=True, default=lambda o: o.__dict__))
+
+    def log(self, src, msg, c=0):
+        print(("[%s] %s" % (src, msg)).encode("ascii", "replace").decode("ascii"))
+
+    def nav(self, au, vp):
+        return au.vfs.get(vp, "", False, False)[0]
+
+    def assertAxs(self, axs, expected):
+        unpacked = []
+        zs = "uread uwrite umove udel uget upget uhtml uadmin udot"
+        for k in zs.split():
+            unpacked.append(list(sorted(getattr(axs, k))))
+
+        pad = len(unpacked) - len(expected)
+        self.assertEqual(unpacked, expected + [[]] * pad)
+
+    def assertAxsAt(self, au, vp, expected):
+        self.assertAxs(self.nav(au, vp).axs, expected)
+
+    def assertNodes(self, vfs, expected):
+        got = list(sorted(vfs.nodes.keys()))
+        self.assertEqual(got, expected)
+
+    def assertNodesAt(self, au, vp, expected):
+        self.assertNodes(self.nav(au, vp), expected)
+
+    def prep(self):
+        here = os.path.abspath(os.path.dirname(__file__))
+        cfgdir = os.path.join(here, "res", "idp")
+
+        # globals are applied by main so need to cheat a little
+        xcfg = { "idp_h_usr": "x-idp-user", "idp_h_grp": "x-idp-group" }
+
+        return here, cfgdir, xcfg
+
+    # buckle up...
+
+    def test_1(self):
+        """
+        trivial; volumes [/] and [/vb] with one user in [/] only
+        """
+        _, cfgdir, xcfg = self.prep()
+        au = AuthSrv(Cfg(c=[cfgdir + "/1.conf"], **xcfg), self.log)
+
+        self.assertEqual(au.vfs.vpath, "")
+        self.assertEqual(au.vfs.realpath, "/")
+        self.assertNodes(au.vfs, ["vb"])
+        self.assertNodes(au.vfs.nodes["vb"], [])
+
+        self.assertAxs(au.vfs.axs, [["ua"]])
+        self.assertAxs(au.vfs.nodes["vb"].axs, [])
+
+    def test_2(self):
+        """
+        users ua/ub/uc, group ga (ua+ub) in basic combinations
+        """
+        _, cfgdir, xcfg = self.prep()
+        au = AuthSrv(Cfg(c=[cfgdir + "/2.conf"], **xcfg), self.log)
+
+        self.assertEqual(au.vfs.vpath, "")
+        self.assertEqual(au.vfs.realpath, "/")
+        self.assertNodes(au.vfs, ["vb", "vc"])
+        self.assertNodes(au.vfs.nodes["vb"], [])
+        self.assertNodes(au.vfs.nodes["vc"], [])
+
+        self.assertAxs(au.vfs.axs, [["ua", "ub"]])
+        self.assertAxsAt(au, "vb", [["ua", "ub"]])  # same as:
+        self.assertAxs(au.vfs.nodes["vb"].axs, [["ua", "ub"]])
+        self.assertAxs(au.vfs.nodes["vc"].axs, [["ua", "ub", "uc"]])
+
+    def test_3(self):
+        """
+        IdP-only; dynamically created volumes for users/groups
+        """
+        _, cfgdir, xcfg = self.prep()
+        au = AuthSrv(Cfg(c=[cfgdir + "/3.conf"], **xcfg), self.log)
+
+        self.assertEqual(au.vfs.vpath, "")
+        self.assertEqual(au.vfs.realpath, "")
+        self.assertNodes(au.vfs, [])
+        self.assertAxs(au.vfs.axs, [])
+
+        au.idp_checkin(None, "iua", "iga")
+        self.assertNodes(au.vfs, ["vg", "vu"])
+        self.assertNodesAt(au, "vu", ["iua"])  # same as:
+        self.assertNodes(au.vfs.nodes["vu"], ["iua"])
+        self.assertNodes(au.vfs.nodes["vg"], ["iga"])
+        self.assertEqual(au.vfs.nodes["vu"].realpath, "")
+        self.assertEqual(au.vfs.nodes["vg"].realpath, "")
+        self.assertAxs(au.vfs.axs, [])
+        self.assertAxsAt(au, "vu/iua", [["iua"]])  # same as:
+        self.assertAxs(self.nav(au, "vu/iua").axs, [["iua"]])
+        self.assertAxs(self.nav(au, "vg/iga").axs, [["iua"]])  # axs is unames
+
+    def test_4(self):
+        """
+        IdP mixed with regular users
+        """
+        _, cfgdir, xcfg = self.prep()
+        au = AuthSrv(Cfg(c=[cfgdir + "/4.conf"], **xcfg), self.log)
+
+        self.assertEqual(au.vfs.vpath, "")
+        self.assertEqual(au.vfs.realpath, "")
+        self.assertNodes(au.vfs, ["vu"])
+        self.assertNodesAt(au, "vu", ["ua", "ub"])
+        self.assertAxs(au.vfs.axs, [])
+        self.assertAxsAt(au, "vu", [])
+        self.assertAxsAt(au, "vu/ua", [["ua"]])
+        self.assertAxsAt(au, "vu/ub", [["ub"]])
+
+        au.idp_checkin(None, "iua", "iga")
+        self.assertNodes(au.vfs, ["vg", "vu"])
+        self.assertNodesAt(au, "vu", ["iua", "ua", "ub"])
+        self.assertNodesAt(au, "vg", ["iga1", "iga2"])
+        self.assertAxs(au.vfs.axs, [])
+        self.assertAxsAt(au, "vu", [])
+        self.assertAxsAt(au, "vu/iua", [["iua"]])
+        self.assertAxsAt(au, "vu/ua", [["ua"]])
+        self.assertAxsAt(au, "vu/ub", [["ub"]])
+        self.assertAxsAt(au, "vg", [])
+        self.assertAxsAt(au, "vg/iga1", [["iua"]])
+        self.assertAxsAt(au, "vg/iga2", [["iua", "ua"]])
+        self.assertEqual(self.nav(au, "vu/ua").realpath, "/u-ua")
+        self.assertEqual(self.nav(au, "vu/iua").realpath, "/u-iua")
+        self.assertEqual(self.nav(au, "vg/iga1").realpath, "/g1-iga")
+        self.assertEqual(self.nav(au, "vg/iga2").realpath, "/g2-iga")
+
+    def test_5(self):
+        """
+        one IdP user in multiple groups
+        """
+        _, cfgdir, xcfg = self.prep()
+        au = AuthSrv(Cfg(c=[cfgdir + "/5.conf"], **xcfg), self.log)
+
+        self.assertEqual(au.vfs.vpath, "")
+        self.assertEqual(au.vfs.realpath, "")
+        self.assertNodes(au.vfs, ["g", "ga", "gb"])
+        self.assertAxs(au.vfs.axs, [])
+
+        au.idp_checkin(None, "iua", "ga")
+        self.assertNodes(au.vfs, ["g", "ga", "gb"])
+        self.assertAxsAt(au, "g", [["iua"]])
+        self.assertAxsAt(au, "ga", [["iua"]])
+        self.assertAxsAt(au, "gb", [])
+
+        au.idp_checkin(None, "iua", "gb")
+        self.assertNodes(au.vfs, ["g", "ga", "gb"])
+        self.assertAxsAt(au, "g", [["iua"]])
+        self.assertAxsAt(au, "ga", [])
+        self.assertAxsAt(au, "gb", [["iua"]])
+
+        au.idp_checkin(None, "iua", "ga|gb")
+        self.assertNodes(au.vfs, ["g", "ga", "gb"])
+        self.assertAxsAt(au, "g", [["iua"]])
+        self.assertAxsAt(au, "ga", [["iua"]])
+        self.assertAxsAt(au, "gb", [["iua"]])
--- a/tests/util.py
+++ b/tests/util.py
@@ -43,8 +43,8 @@ if MACOS:

 from copyparty.__init__ import E
 from copyparty.__main__ import init_E
-from copyparty.util import FHC, Garda, Unrecv
 from copyparty.u2idx import U2idx
+from copyparty.util import FHC, Garda, Unrecv

 init_E(E)

@@ -110,28 +110,28 @@ class Cfg(Namespace):
    def __init__(self, a=None, v=None, c=None, **ka0):
        ka = {}

-        ex = "daw dav_auth dav_inf dav_mac dav_rt e2d e2ds e2dsa e2t e2ts e2tsr e2v e2vu e2vp ed emp exp force_js getmod grid hardlink ih ihead magic never_symlink nid nih no_acode no_athumb no_dav no_dedup no_del no_dupe no_lifetime no_logues no_mv no_readme no_robots no_sb_md no_sb_lg no_scandir no_tarcmp no_thumb no_vthumb no_zip nrand nw rand smb srch_dbg stats th_no_crop vague_403 vc ver xdev xlink xvol"
+        ex = "daw dav_auth dav_inf dav_mac dav_rt e2d e2ds e2dsa e2t e2ts e2tsr e2v e2vu e2vp ed emp exp force_js getmod grid hardlink ih ihead magic never_symlink nid nih no_acode no_athumb no_dav no_dedup no_del no_dupe no_lifetime no_logues no_mv no_readme no_robots no_sb_md no_sb_lg no_scandir no_tarcmp no_thumb no_vthumb no_zip nrand nw q rand smb srch_dbg stats vague_403 vc ver xdev xlink xvol"
        ka.update(**{k: False for k in ex.split()})

        ex = "dotpart dotsrch no_dhash no_fastboot no_rescan no_sendfile no_voldump re_dhash plain_ip"
        ka.update(**{k: True for k in ex.split()})

-        ex = "ah_cli ah_gen css_browser hist ipa_re js_browser no_forget no_hash no_idx nonsus_urls"
+        ex = "ah_cli ah_gen css_browser hist js_browser no_forget no_hash no_idx nonsus_urls"
        ka.update(**{k: None for k in ex.split()})

-        ex = "hash_mt srch_time u2j"
+        ex = "hash_mt srch_time u2abort u2j"
        ka.update(**{k: 1 for k in ex.split()})

        ex = "reg_cap s_thead s_tbody th_convt"
        ka.update(**{k: 9 for k in ex.split()})

-        ex = "db_act df loris re_maxage rproxy rsp_jtr rsp_slp s_wr_slp snap_wri theme themes turbo"
+        ex = "db_act df k304 loris re_maxage rproxy rsp_jtr rsp_slp s_wr_slp snap_wri theme themes turbo"
        ka.update(**{k: 0 for k in ex.split()})

        ex = "ah_alg bname doctitle exit favico idp_h_usr html_head lg_sbf log_fk md_sbf name textfiles unlist vname R RS SR"
        ka.update(**{k: "" for k in ex.split()})

-        ex = "on403 on404 xad xar xau xban xbd xbr xbu xiu xm"
+        ex = "grp on403 on404 xad xar xau xban xbd xbr xbu xiu xm"
        ka.update(**{k: [] for k in ex.split()})

        ex = "exp_lg exp_md th_coversd"
@@ -146,16 +146,20 @@ class Cfg(Namespace):
            E=E,
            dbd="wal",
            fk_salt="a" * 16,
+            idp_gsep=re.compile("[|:;+,]"),
            lang="eng",
            log_badpwd=1,
            logout=573,
            mte={"a": True},
            mth={},
            mtp=[],
+            rm_retry="0/0",
            s_wr_sz=512 * 1024,
            sort="href",
            srch_hits=99999,
+            th_crop="y",
            th_size="320x256",
+            th_x3="n",
            u2sort="s",
            u2ts="c",
            unpost=600,
@@ -238,10 +242,12 @@ class VHttpConn(object):
        self.freshen_pwd = 0.0
        self.hsrv = VHttpSrv(args, asrv, log)
        self.ico = None
+        self.ipa_nm = None
        self.lf_url = None
        self.log_func = log
        self.log_src = "a"
        self.mutex = threading.Lock()
+        self.u2mutex = threading.Lock()
        self.nbyte = 0
        self.nid = None
        self.nreq = -1