v1.18.1

avoid pillow warning
add idp-cache editor ui
2025-07-07 13:20:59 +00:00 · 2025-07-07 12:58:03 +00:00 · 2025-07-07 12:52:31 +00:00 · 2025-07-07 11:09:46 +00:00 · 2025-07-07 11:05:49 +00:00 · 2025-07-07 09:53:03 +00:00
53 changed files with 1344 additions and 178 deletions
--- a/README.md
+++ b/README.md
@@ -8,12 +8,14 @@ turn almost any device into a file server with resumable uploads/downloads using
 * 🔌 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
+👉 **[Get started](#quickstart)!** or visit the **[read-only demo server](https://a.ocv.me/pub/demo/)** 👀 running on a nuc in my basement

 📷 **screenshots:** [browser](#the-browser) // [upload](#uploading) // [unpost](#unpost) // [thumbnails](#thumbnails) // [search](#searching) // [fsearch](#file-search) // [zip-DL](#zip-downloads) // [md-viewer](#markdown-viewer)

 🎬 **videos:** [upload](https://a.ocv.me/pub/demo/pics-vids/up2k.webm) // [cli-upload](https://a.ocv.me/pub/demo/pics-vids/u2cli.webm) // [race-the-beam](https://a.ocv.me/pub/g/nerd-stuff/cpp/2024-0418-race-the-beam.webm)

+made in Norway 🇳🇴
+

 ## readme toc

@@ -54,6 +56,7 @@ turn almost any device into a file server with resumable uploads/downloads using
        * [creating a playlist](#creating-a-playlist) - with a standalone mediaplayer or copyparty
        * [audio equalizer](#audio-equalizer) - and [dynamic range compressor](https://en.wikipedia.org/wiki/Dynamic_range_compression)
        * [fix unreliable playback on android](#fix-unreliable-playback-on-android) - due to phone / app settings
+    * [textfile viewer](#textfile-viewer) - with realtime streaming of logfiles and such ([demo](https://a.ocv.me/pub/demo/logtail/))
    * [markdown viewer](#markdown-viewer) - and there are *two* editors
        * [markdown vars](#markdown-vars) - dynamic docs with serverside variable expansion
    * [other tricks](#other-tricks)
@@ -255,7 +258,8 @@ also see [comparison to similar software](./docs/versus.md)
    * ☑ play video files as audio (converted on server)
    * ☑ create and play [m3u8 playlists](#playlists)
  * ☑ image gallery with webm player
-  * ☑ textfile browser with syntax hilighting
+  * ☑ [textfile browser](#textfile-viewer) with syntax hilighting
+    * ☑ realtime streaming of growing files (logfiles and such)
  * ☑ [thumbnails](#thumbnails)
    * ☑ ...of images using Pillow, pyvips, or FFmpeg
    * ☑ ...of videos using FFmpeg
@@ -559,6 +563,8 @@ a client can request to see dotfiles in directory listings if global option `-ed

 dotfiles do not appear in search results unless one of the above is true, **and** the global option / volflag `dotsrch` is set

+> even if user has permission to see dotfiles, they are default-hidden unless `--see-dots` is set, and/or user has enabled the `dotfiles` option in the settings tab
+
 config file example, where the same permission to see dotfiles is given in two different ways just for reference:

 ```yaml
@@ -695,7 +701,10 @@ enabling `multiselect` lets you click files to select them, and then shift-click
 * `multiselect` is mostly intended for phones/tablets, but the `sel` option in the `[⚙️] settings` tab is better suited for desktop use, allowing selection by CTRL-clicking and range-selection with SHIFT-click, all without affecting regular clicking
  * the `sel` option can be made default globally with `--gsel` or per-volume with volflag `gsel`

-to show `/icons/exe.png` as the thumbnail for all .exe files, `--ext-th=exe=/icons/exe.png` (optionally as a volflag)
+to show `/icons/exe.png` and `/icons/elf.gif` as the thumbnail for all `.exe` and `.elf` files respectively, do this: `--ext-th=exe=/icons/exe.png --ext-th=elf=/icons/elf.gif`
+* optionally as separate volflags for each mapping; see config file example below
+* the supported image formats are [jpg, png, gif, webp, ico](https://developer.mozilla.org/en-US/docs/Web/Media/Guides/Formats/Image_types)
+  * be careful with svg; chrome will crash if you have too many unique svg files showing on the same page (the limit is 250 or so) -- showing the same handful of svg files thousands of times is ok however

 config file example:

@@ -712,6 +721,7 @@ config file example:
    dthumb   # disable ALL thumbnails and audio transcoding
    dvthumb  # only disable video thumbnails
    ext-th:  exe=/ico/exe.png  # /ico/exe.png is the thumbnail of *.exe
+    ext-th:  elf=/ico/elf.gif  # ...and /ico/elf.gif is used for *.elf
    th-covers:  folder.png,folder.jpg,cover.png,cover.jpg  # the default
 ```

@@ -1119,6 +1129,18 @@ not available on iPhones / iPads because AudioContext currently breaks backgroun
 due to phone / app settings,  android phones may randomly stop playing music when the power saver kicks in, especially at the end of an album -- you can fix it by [disabling power saving](https://user-images.githubusercontent.com/241032/235262123-c328cca9-3930-4948-bd18-3949b9fd3fcf.png) in the [app settings](https://user-images.githubusercontent.com/241032/235262121-2ffc51ae-7821-4310-a322-c3b7a507890c.png) of the browser you use for music streaming (preferably a dedicated one)


+## textfile viewer
+
+with realtime streaming of logfiles and such ([demo](https://a.ocv.me/pub/demo/logtail/))  , and terminal colors work too
+
+click `-txt-` next to a textfile to open the viewer, which has the following toolbar buttons:
+
+* `✏️ edit` opens the textfile editor
+* `📡 follow` starts monitoring the file for changes, streaming new lines in realtime
+  * similar to `tail -f`
+  * [link directly](https://a.ocv.me/pub/demo/logtail/?doc=lipsum.txt&tail) to a file with tailing enabled by adding `&tail` to the textviewer URL
+
+
 ## markdown viewer

 and there are *two* editors
@@ -1479,7 +1501,6 @@ the same arguments can be set as volflags, in addition to `d2d`, `d2ds`, `d2t`,
 note:
 * upload-times can be displayed in the file listing by enabling the `.up_at` metadata key, either globally with `-e2d -mte +.up_at` or per-volume with volflags `e2d,mte=+.up_at` (will have a ~17% performance impact on directory listings)
 * `e2tsr` is probably always overkill, since `e2ds`/`e2dsa` would pick up any file modifications and `e2ts` would then reindex those, unless there is a new copyparty version with new parsers and the release note says otherwise
-* the rescan button in the admin panel has no effect unless the volume has `-e2ds` or higher

 config file example (these options are recommended btw):

@@ -2417,6 +2438,9 @@ interact with copyparty using non-browser clients
  * and for screenshots on macos, see [./contrib/ishare.iscu](./contrib/#ishareiscu)
  * and for screenshots on linux, see [./contrib/flameshot.sh](./contrib/flameshot.sh)

+* [Custom Uploader](https://f-droid.org/en/packages/com.nyx.custom_uploader/) (an Android app) as an alternative to copyparty's own [PartyUP!](#android-app)
+  * works if you set UploadURL to `https://your.com/foo/?want=url&pw=hunter2` and FormDataName `f`
+
 * 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`
@@ -2518,6 +2542,11 @@ below are some tweaks roughly ordered by usefulness:

 when uploading files,

+* when uploading from very fast storage (NVMe SSD) with chrome/firefox, enable `[wasm]` in the `[⚙️] settings` tab to more effectively use all CPU-cores for hashing
+  * don't do this on Safari (runs faster without)
+  * don't do this on older browsers; likely to provoke browser-bugs (browser eats all RAM and crashes)
+  * can be made default-enabled serverside with `--nosubtle 137` (chrome v137+) or `--nosubtle 2` (chrome+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
@@ -2698,7 +2727,7 @@ enable [thumbnails](#thumbnails) of...
 * **images:** `Pillow` and/or `pyvips` and/or `ffmpeg` (requires py2.7 or py3.5+)
 * **videos/audio:** `ffmpeg` and `ffprobe` somewhere in `$PATH`
 * **HEIF pictures:** `pyvips` or `ffmpeg` or `pyheif-pillow-opener` (requires Linux or a C compiler)
-* **AVIF pictures:** `pyvips` or `ffmpeg` or `pillow-avif-plugin`
+* **AVIF pictures:** `pyvips` or `ffmpeg` or `pillow-avif-plugin` or pillow v11.3+
 * **JPEG XL pictures:** `pyvips` or `ffmpeg`

 enable sending [zeromq messages](#zeromq) from event-hooks: `pyzmq`
@@ -2725,10 +2754,11 @@ set any of the following environment variables to disable its associated optiona
 | `PRTY_NO_CFSSL`      | never attempt to generate self-signed certificates using [cfssl](https://github.com/cloudflare/cfssl) |
 | `PRTY_NO_FFMPEG`     | **audio transcoding** goes byebye, **thumbnailing** must be handled by Pillow/libvips |
 | `PRTY_NO_FFPROBE`    | **audio transcoding** goes byebye, **thumbnailing** must be handled by Pillow/libvips, **metadata-scanning** must be handled by mutagen |
+| `PRTY_NO_MAGIC`      | do not use [magic](https://pypi.org/project/python-magic/) for filetype detection |
 | `PRTY_NO_MUTAGEN`    | do not use [mutagen](https://pypi.org/project/mutagen/) for reading metadata from media files; will fallback to ffprobe |
 | `PRTY_NO_PIL`        | disable all [Pillow](https://pypi.org/project/pillow/)-based thumbnail support; will fallback to libvips or ffmpeg |
 | `PRTY_NO_PILF`       | disable Pillow `ImageFont` text rendering, used for folder thumbnails |
-| `PRTY_NO_PIL_AVIF`   | disable 3rd-party Pillow plugin for [AVIF support](https://pypi.org/project/pillow-avif-plugin/) |
+| `PRTY_NO_PIL_AVIF`   | disable Pillow avif support (internal and/or [plugin](https://pypi.org/project/pillow-avif-plugin/)) |
 | `PRTY_NO_PIL_HEIF`   | disable 3rd-party Pillow plugin for [HEIF support](https://pypi.org/project/pyheif-pillow-opener/) |
 | `PRTY_NO_PIL_WEBP`   | disable use of native webp support in Pillow |
 | `PRTY_NO_PSUTIL`     | do not use [psutil](https://pypi.org/project/psutil/) for reaping stuck hooks and plugins on Windows |
@@ -2825,5 +2855,7 @@ if there's a wall of base64 in the log (thread stacks) then please include that,

 for build instructions etc, see [./docs/devnotes.md](./docs/devnotes.md)

+specifically you may want to [build the sfx](https://github.com/9001/copyparty/blob/hovudstraum/docs/devnotes.md#just-the-sfx) or [build from scratch](https://github.com/9001/copyparty/blob/hovudstraum/docs/devnotes.md#build-from-scratch)
+
 see [./docs/TODO.md](./docs/TODO.md) for planned features / fixes / changes

--- a/bin/hooks/usb-eject.py
+++ b/bin/hooks/usb-eject.py
@@ -4,6 +4,7 @@ import os
 import stat
 import subprocess as sp
 import sys
+from urllib.parse import unquote_to_bytes as unquote


 """
@@ -28,14 +29,17 @@ which does the following respectively,
 """


+MOUNT_BASE = b"/run/media/egon/"
+
+
 def main():
    try:
        label = sys.argv[1].split(":usb-eject:")[1].split(":")[0]
-        mp = "/run/media/egon/" + label
+        mp = MOUNT_BASE + unquote(label)
        # print("ejecting [%s]... " % (mp,), end="")
-        mp = os.path.abspath(os.path.realpath(mp.encode("utf-8")))
+        mp = os.path.abspath(os.path.realpath(mp))
        st = os.lstat(mp)
-        if not stat.S_ISDIR(st.st_mode):
+        if not stat.S_ISDIR(st.st_mode) or not mp.startswith(MOUNT_BASE):
            raise Exception("not a regular directory")

        # if you're running copyparty as root (thx for the faith)
--- a/bin/mtag/install-deps.sh
+++ b/bin/mtag/install-deps.sh
@@ -22,6 +22,8 @@ set -e
 #   modifies the keyfinder python lib to load the .so in ~/pe


+export FORCE_COLOR=1
+
 linux=1

 win=
@@ -186,12 +188,15 @@ install_keyfinder() {
 		echo "so not found at $sop"
 		exit 1
 	}
-	
+
+	x=${-//[^x]/}; set -x; cat /etc/alpine-release
 	# rm -rf /Users/ed/Library/Python/3.9/lib/python/site-packages/*keyfinder*
 	CFLAGS="-I$h/pe/keyfinder/include -I/opt/local/include -I/usr/include/ffmpeg" \
+	CXXFLAGS="-I$h/pe/keyfinder/include -I/opt/local/include -I/usr/include/ffmpeg" \
 	LDFLAGS="-L$h/pe/keyfinder/lib -L$h/pe/keyfinder/lib64 -L/opt/local/lib" \
-	PKG_CONFIG_PATH=/c/msys64/mingw64/lib/pkgconfig \
+	PKG_CONFIG_PATH="/c/msys64/mingw64/lib/pkgconfig:$h/pe/keyfinder/lib/pkgconfig" \
 	$pybin -m pip install --user keyfinder
+	[ "$x" ] || set +x

 	pypath="$($pybin -c 'import keyfinder; print(keyfinder.__file__)')"
 	for pyso in "${pypath%/*}"/*.so; do
--- a/contrib/nginx/copyparty.conf
+++ b/contrib/nginx/copyparty.conf
@@ -2,19 +2,38 @@
 # not accept more consecutive clients than what copyparty is able to;
 # nginx default is 512  (worker_processes 1, worker_connections 512)
 #
+# ======================================================================
+#
+# to reverse-proxy a specific path/subpath/location below a domain
+# (rather than a complete subdomain), for example "/qw/er", you must
+# run copyparty with --rp-loc /qw/as and also change the following:
+# 	location / {
+# 		proxy_pass http://cpp_tcp;
+# to this:
+# 	location /qw/er/ {
+# 		proxy_pass http://cpp_tcp/qw/er/;
+#
+# ======================================================================
+#
 # rarely, in some extreme usecases, it can be good to add -j0
 # (40'000 requests per second, or 20gbps upload/download in parallel)
 # but this is usually counterproductive and slightly buggy
 #
+# ======================================================================
+#
 # on fedora/rhel, remember to setsebool -P httpd_can_network_connect 1
 #
-# if you are behind cloudflare (or another protection service),
+# ======================================================================
+#
+# if you are behind cloudflare (or another CDN/WAF/protection service),
 # remember to reject all connections which are not coming from your
 # protection service -- for cloudflare in particular, you can
 # generate the list of permitted IP ranges like so:
 #   (curl -s https://www.cloudflare.com/ips-v{4,6} | sed 's/^/allow /; s/$/;/'; echo; echo "deny all;") > /etc/nginx/cloudflare-only.conf
 #
 # and then enable it below by uncomenting the cloudflare-only.conf line
+#
+# ======================================================================


 upstream cpp_tcp {
--- a/contrib/package/arch/PKGBUILD
+++ b/contrib/package/arch/PKGBUILD
@@ -1,6 +1,6 @@
 # Maintainer: icxes <dev.null@need.moe>
 pkgname=copyparty
-pkgver="1.17.0"
+pkgver="1.18.0"
 pkgrel=1
 pkgdesc="File server with accelerated resumable uploads, dedup, WebDAV, FTP, TFTP, zeroconf, media indexer, thumbnails++"
 arch=("any")
@@ -22,7 +22,7 @@ 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=("d8a49b3398f4cdb0754dd8b9e3ab32544e44e2fee94c88903f65ffc003b6eeec")
+sha256sums=("69c70c96b9ac4a09c47ccc51f7930a6e82f52ed727030374842681533afc128c")

 build() {
    cd "${srcdir}/${pkgname}-${pkgver}"
--- a/contrib/package/nix/copyparty/default.nix
+++ b/contrib/package/nix/copyparty/default.nix
@@ -1,4 +1,4 @@
-{ lib, stdenv, makeWrapper, fetchurl, utillinux, python, jinja2, impacket, pyftpdlib, pyopenssl, argon2-cffi, pillow, pyvips, pyzmq, ffmpeg, mutagen,
+{ lib, stdenv, makeWrapper, fetchurl, util-linux, python, jinja2, impacket, pyftpdlib, pyopenssl, argon2-cffi, pillow, pyvips, pyzmq, ffmpeg, mutagen,

 # use argon2id-hashed passwords in config files (sha2 is always available)
 withHashedPasswords ? true,
@@ -61,7 +61,7 @@ in stdenv.mkDerivation {
  installPhase = ''
    install -Dm755 $src $out/share/copyparty-sfx.py
    makeWrapper ${pyEnv.interpreter} $out/bin/copyparty \
-      --set PATH '${lib.makeBinPath ([ utillinux ] ++ lib.optional withMediaProcessing ffmpeg)}:$PATH' \
+      --set PATH '${lib.makeBinPath ([ util-linux ] ++ lib.optional withMediaProcessing ffmpeg)}:$PATH' \
      --add-flags "$out/share/copyparty-sfx.py"
  '';
  meta.mainProgram = "copyparty";
--- 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/v1.17.0/copyparty-sfx.py",
-    "version": "1.17.0",
-    "hash": "sha256-iRqaXQvwX4DceOhZmI6g9KXeR+rFAWnNHK/GTHkoQ7Q="
+    "url": "https://github.com/9001/copyparty/releases/download/v1.18.0/copyparty-sfx.py",
+    "version": "1.18.0",
+    "hash": "sha256-kCKLnQ1GDXzxceB76CtUi1TzVqSHgC03PUb/Bhm5SSk="
 }
--- a/contrib/plugins/minimal-up2k.js
+++ b/contrib/plugins/minimal-up2k.js
@@ -12,6 +12,23 @@ almost the same as minimal-up2k.html except this one...:

 -- looks slightly better

+
+========================
+== USAGE INSTRUCTIONS ==
+
+1. create a volume which anyone can read from (if you haven't already)
+2. copy this file into that volume, so anyone can download it
+3. enable the plugin by telling the webbrowser to load this file;
+    assuming the URL to the public volume is /res/, and
+    assuming you're using config-files, then add this to your config:
+
+    [global]
+      js-browser: /res/minimal-up2k.js
+
+alternatively, if you're not using config-files, then
+add the following commandline argument instead:
+  --js-browser=/res/minimal-up2k.js
+
 */

 var u2min = `
--- a/copyparty/init.py
+++ b/copyparty/init.py
@@ -80,6 +80,7 @@ web/deps/prismd.css
 web/deps/scp.woff2
 web/deps/sha512.ac.js
 web/deps/sha512.hw.js
+web/idp.html
 web/iiam.gif
 web/md.css
 web/md.html
--- a/copyparty/main.py
+++ b/copyparty/main.py
@@ -964,6 +964,7 @@ def add_general(ap, nc, srvname):
    ap2.add_argument("--name", metavar="TXT", type=u, default=srvname, help="server name (displayed topleft in browser and in mDNS)")
    ap2.add_argument("--mime", metavar="EXT=MIME", type=u, action="append", help="map file \033[33mEXT\033[0mension to \033[33mMIME\033[0mtype, for example [\033[32mjpg=image/jpeg\033[0m]")
    ap2.add_argument("--mimes", action="store_true", help="list default mimetype mapping and exit")
+    ap2.add_argument("--rmagic", action="store_true", help="do expensive analysis to improve accuracy of returned mimetypes; will make file-downloads, rss, and webdav slower (volflag=rmagic)")
    ap2.add_argument("--license", action="store_true", help="show licenses and exit")
    ap2.add_argument("--version", action="store_true", help="show versions and exit")

@@ -1028,6 +1029,7 @@ def add_upload(ap):
    ap2.add_argument("--df", metavar="GiB", type=u, default="0", help="ensure \033[33mGiB\033[0m free disk space by rejecting upload requests; assumes gigabytes unless a unit suffix is given: [\033[32m256m\033[0m], [\033[32m4\033[0m], [\033[32m2T\033[0m] (volflag=df)")
    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("--nosubtle", metavar="N", type=int, default=0, help="when to use a wasm-hasher instead of the browser's builtin; faster on chrome, but buggy in older chrome versions. [\033[32m0\033[0m] = only when necessary (non-https), [\033[32m1\033[0m] = always (all browsers), [\033[32m2\033[0m] = always on chrome/firefox, [\033[32m3\033[0m] = always on chrome, [\033[32mN\033[0m] = chrome-version N and newer (recommendation: 137)")
    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 when latency is low (same-country), 2~4 for android-clients, 2~6 for cross-atlantic. Max is 6 in most browsers. Big values increase network-speed but may reduce HDD-speed")
    ap2.add_argument("--u2sz", metavar="N,N,N", type=u, default="1,64,96", help="web-client: default upload chunksize (MiB); sets \033[33mmin,default,max\033[0m in the settings gui. Each HTTP POST will aim for \033[33mdefault\033[0m, and never exceed \033[33mmax\033[0m. Cloudflare max is 96. Big values are good for cross-atlantic but may increase HDD fragmentation on some FS. Disable this optimization with [\033[32m1,1,1\033[0m]")
    ap2.add_argument("--u2ow", metavar="NUM", type=int, default=0, help="web-client: default setting for when to replace/overwrite existing files; [\033[32m0\033[0m]=never, [\033[32m1\033[0m]=if-client-newer, [\033[32m2\033[0m]=always (volflag=u2ow)")
@@ -1091,12 +1093,16 @@ def add_cert(ap, cert_path):


 def add_auth(ap):
+    idp_db = os.path.join(E.cfg, "idp.db")
    ses_db = os.path.join(E.cfg, "sessions.db")
    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 if the request-header \033[33mHN\033[0m contains a username to associate the request with (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")
    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")
+    ap2.add_argument("--idp-db", metavar="PATH", type=u, default=idp_db, help="where to store the known IdP users/groups (if you run multiple copyparty instances, make sure they use different DBs)")
+    ap2.add_argument("--idp-store", metavar="N", type=int, default=1, help="how to use \033[33m--idp-db\033[0m; [\033[32m0\033[0m] = entirely disable, [\033[32m1\033[0m] = write-only (effectively disabled), [\033[32m2\033[0m] = remember users, [\033[32m3\033[0m] = remember users and groups.\nNOTE: Will remember and restore the IdP-volumes of all users for all eternity if set to 2 or 3, even when user is deleted from your IdP")
+    ap2.add_argument("--idp-adm", metavar="U,U", type=u, default="", help="comma-separated list of users allowed to use /?idp (the cache management UI)")
    ap2.add_argument("--no-bauth", action="store_true", help="disable basic-authentication support; do not accept passwords from the 'Authenticate' header at all. NOTE: This breaks support for the android app")
    ap2.add_argument("--bauth-last", action="store_true", help="keeps basic-authentication enabled, but only as a last-resort; if a cookie is also provided then the cookie wins")
    ap2.add_argument("--ses-db", metavar="PATH", type=u, default=ses_db, help="where to store the sessions database (if you run multiple copyparty instances, make sure they use different DBs)")
@@ -1269,6 +1275,7 @@ def add_optouts(ap):
    ap2.add_argument("--no-tarcmp", action="store_true", help="disable download as compressed tar (?tar=gz, ?tar=bz2, ?tar=xz, ?tar=gz:9, ...)")
    ap2.add_argument("--no-lifetime", action="store_true", help="do not allow clients (or server config) to schedule an upload to be deleted after a given time")
    ap2.add_argument("--no-pipe", action="store_true", help="disable race-the-beam (lockstep download of files which are currently being uploaded) (volflag=nopipe)")
+    ap2.add_argument("--no-tail", action="store_true", help="disable streaming a growing files with ?tail (volflag=notail)")
    ap2.add_argument("--no-db-ip", action="store_true", help="do not write uploader-IP into the database; will also disable unpost, you may want \033[32m--forget-ip\033[0m instead (volflag=no_db_ip)")


@@ -1398,6 +1405,16 @@ def add_transcoding(ap):
    ap2.add_argument("--ac-maxage", metavar="SEC", type=int, default=86400, help="delete cached transcode output after \033[33mSEC\033[0m seconds")


+def add_tail(ap):
+    ap2 = ap.add_argument_group('tailing options (realtime streaming of a growing file)')
+    ap2.add_argument("--tail-who", metavar="LVL", type=int, default=2, help="who can tail? [\033[32m0\033[0m]=nobody, [\033[32m1\033[0m]=admins, [\033[32m2\033[0m]=authenticated-with-read-access, [\033[32m3\033[0m]=everyone-with-read-access (volflag=tail_who)")
+    ap2.add_argument("--tail-cmax", metavar="N", type=int, default=64, help="do not allow starting a new tail if more than \033[33mN\033[0m active downloads")
+    ap2.add_argument("--tail-tmax", metavar="SEC", type=float, default=0, help="terminate connection after \033[33mSEC\033[0m seconds; [\033[32m0\033[0m]=never (volflag=tail_tmax)")
+    ap2.add_argument("--tail-rate", metavar="SEC", type=float, default=0.2, help="check for new data every \033[33mSEC\033[0m seconds (volflag=tail_rate)")
+    ap2.add_argument("--tail-ka", metavar="SEC", type=float, default=3.0, help="send a zerobyte if connection is idle for \033[33mSEC\033[0m seconds to prevent disconnect")
+    ap2.add_argument("--tail-fd", metavar="SEC", type=float, default=1.0, help="check if file was replaced (new fd) if idle for \033[33mSEC\033[0m seconds (volflag=tail_fd)")
+
+
 def add_rss(ap):
    ap2 = ap.add_argument_group('RSS options')
    ap2.add_argument("--rss", action="store_true", help="enable RSS output (experimental) (volflag=rss)")
@@ -1493,6 +1510,7 @@ def add_ui(ap, retry):
    ap2.add_argument("--sort", metavar="C,C,C", type=u, default="href", help="default sort order, comma-separated column IDs (see header tooltips), prefix with '-' for descending. Examples: \033[32mhref -href ext sz ts tags/Album tags/.tn\033[0m (volflag=sort)")
    ap2.add_argument("--nsort", action="store_true", help="default-enable natural sort of filenames with leading numbers (volflag=nsort)")
    ap2.add_argument("--hsortn", metavar="N", type=int, default=2, help="number of sorting rules to include in media URLs by default (volflag=hsortn)")
+    ap2.add_argument("--see-dots", action="store_true", help="default-enable seeing dotfiles; only takes effect if user has the necessary permissions")
    ap2.add_argument("--unlist", metavar="REGEX", type=u, default="", help="don't show files matching \033[33mREGEX\033[0m in file list. Purely cosmetic! Does not affect API calls, just the browser. Example: [\033[32m\\.(js|css)$\033[0m] (volflag=unlist)")
    ap2.add_argument("--favico", metavar="TXT", type=u, default="c 000 none" if retry else "🎉 000 none", help="\033[33mfavicon-text\033[0m [ \033[33mforeground\033[0m [ \033[33mbackground\033[0m ] ], set blank to disable")
    ap2.add_argument("--ext-th", metavar="E=VP", type=u, action="append", help="use thumbnail-image \033[33mVP\033[0m for file-extension \033[33mE\033[0m, example: [\033[32mexe=/.res/exe.png\033[0m] (volflag=ext_th)")
@@ -1602,6 +1620,7 @@ def run_argparse(
    add_hooks(ap)
    add_stats(ap)
    add_txt(ap)
+    add_tail(ap)
    add_og(ap)
    add_ui(ap, retry)
    add_admin(ap)
--- a/copyparty/version.py
+++ b/copyparty/version.py
@@ -1,8 +1,8 @@
 # coding: utf-8

-VERSION = (1, 17, 1)
-CODENAME = "mixtape.m3u"
-BUILD_DT = (2025, 5, 18)
+VERSION = (1, 18, 1)
+CODENAME = "logtail"
+BUILD_DT = (2025, 7, 7)

 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
@@ -21,6 +21,7 @@ from .util import (
    DEF_MTE,
    DEF_MTH,
    EXTS,
+    HAVE_SQLITE3,
    IMPLICATIONS,
    MIMES,
    SQLITE_VER,
@@ -32,6 +33,7 @@ from .util import (
    afsenc,
    get_df,
    humansize,
+    min_ex,
    odfusion,
    read_utf8,
    relchk,
@@ -44,6 +46,9 @@ from .util import (
    vsplit,
 )

+if HAVE_SQLITE3:
+    import sqlite3
+
 if True:  # pylint: disable=using-constant-test
    from collections.abc import Iterable

@@ -72,7 +77,9 @@ SSEELOG = " ({})".format(SEE_LOG)
 BAD_CFG = "invalid config; {}".format(SEE_LOG)
 SBADCFG = " ({})".format(BAD_CFG)

-PTN_U_GRP = re.compile(r"\$\{u%([+-])([^}]+)\}")
+PTN_U_GRP = re.compile(r"\$\{u(%[+-][^}]+)\}")
+PTN_G_GRP = re.compile(r"\$\{g(%[+-][^}]+)\}")
+PTN_SIGIL = re.compile(r"(\${[ug][}%])")


 class CfgEx(Exception):
@@ -357,7 +364,6 @@ class VFS(object):
        self.flags = flags  # config options
        self.root = self
        self.dev = 0  # st_dev
-        self.badcfg1 = False
        self.nodes: dict[str, VFS] = {}  # child nodes
        self.histtab: dict[str, str] = {}  # all realpath->histpath
        self.dbpaths: dict[str, str] = {}  # all realpath->dbpath
@@ -877,6 +883,7 @@ class AuthSrv(object):
        self.warn_anonwrite = warn_anonwrite
        self.line_ctr = 0
        self.indent = ""
+        self.is_lxc = args.c == ["/z/initcfg"]

        # fwd-decl
        self.vfs = VFS(log_func, "", "", "", AXS(), {})
@@ -887,6 +894,8 @@ class AuthSrv(object):
        self.defpw: dict[str, str] = {}
        self.grps: dict[str, list[str]] = {}
        self.re_pwd: Optional[re.Pattern] = None
+        self.cfg_files_loaded: list[str] = []
+        self.badcfg1 = False

        # all volumes observed since last restart
        self.idp_vols: dict[str, str] = {}  # vpath->abspath
@@ -931,6 +940,10 @@ class AuthSrv(object):
                return False

            self.idp_accs[uname] = gnames
+            try:
+                self._update_idp_db(uname, gname)
+            except:
+                self.log("failed to update the --idp-db:\n%s" % (min_ex(),), 3)

            t = "reinitializing due to new user from IdP: [%r:%r]"
            self.log(t % (uname, gnames), 3)
@@ -943,6 +956,22 @@ class AuthSrv(object):
        broker.ask("reload", False, True).get()
        return True

+    def _update_idp_db(self, uname: str, gname: str) -> None:
+        if not self.args.idp_store:
+            return
+
+        assert sqlite3  # type: ignore  # !rm
+
+        db = sqlite3.connect(self.args.idp_db)
+        cur = db.cursor()
+
+        cur.execute("delete from us where un = ?", (uname,))
+        cur.execute("insert into us values (?,?)", (uname, gname))
+
+        db.commit()
+        cur.close()
+        db.close()
+
    def _map_volume_idp(
        self,
        src: str,
@@ -963,15 +992,27 @@ class AuthSrv(object):
            un_gn = [("", "")]

        for un, gn in un_gn:
-            m = PTN_U_GRP.search(dst0)
-            if m:
-                req, gnc = m.groups()
-                hit = gnc in (un_gns.get(un) or [])
-                if req == "+":
-                    if not hit:
-                        continue
-                elif hit:
+            rejected = False
+            for ptn in [PTN_U_GRP, PTN_G_GRP]:
+                m = ptn.search(dst0)
+                if not m:
                    continue
+                zs = m.group(1)
+                zs = zs.replace(",%+", "\n%+")
+                zs = zs.replace(",%-", "\n%-")
+                for rule in zs.split("\n"):
+                    gnc = rule[2:]
+                    if ptn == PTN_U_GRP:
+                        # is user member of group?
+                        hit = gnc in (un_gns.get(un) or [])
+                    else:
+                        # is it this specific group?
+                        hit = gn == gnc
+
+                    if rule.startswith("%+") != hit:
+                        rejected = True
+            if rejected:
+                continue

            # if ap/vp has a user/group placeholder, make sure to keep
            # track so the same user/group is mapped when setting perms;
@@ -986,6 +1027,8 @@ class AuthSrv(object):

            src = src1.replace("${g}", gn or "\n")
            dst = dst1.replace("${g}", gn or "\n")
+            src = PTN_G_GRP.sub(gn or "\n", src)
+            dst = PTN_G_GRP.sub(gn or "\n", dst)
            if src == src1 and dst == dst1:
                gn = ""

@@ -1077,6 +1120,7 @@ class AuthSrv(object):
         * any non-zero value from IdP group header
         * otherwise take --grps / [groups]
        """
+        self.load_idp_db(bool(self.idp_accs))
        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():
@@ -1482,8 +1526,10 @@ class AuthSrv(object):
        daxs: dict[str, AXS] = {}
        mflags: dict[str, dict[str, Any]] = {}  # vpath:flags
        mount: dict[str, tuple[str, str]] = {}  # dst:src (vp:(ap,vp0))
+        cfg_files_loaded: list[str] = []

        self.idp_vols = {}  # yolo
+        self.badcfg1 = False

        if self.args.a:
            # list of username:password
@@ -1544,6 +1590,7 @@ class AuthSrv(object):
                    zst = [(max(0, len(x) - 2) * " ") + "└" + x[-1] for x in zstt]
                    t = "loaded {} config files:\n{}"
                    self.log(t.format(len(zst), "\n".join(zst)))
+                    cfg_files_loaded = zst

                except:
                    lns = lns[: self.line_ctr]
@@ -1568,9 +1615,14 @@ class AuthSrv(object):
        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)
-            if os.path.exists("/z/initcfg"):
-                t = "Read-access has been disabled due to failsafe: Docker detected, but the config does not define any volumes. This failsafe is to prevent unintended access if this is due to accidental loss of config. You can override this safeguard and allow read/write to all of /w/ by adding the following arguments to the docker container:  -v .::rw"
-                self.log(t, 1)
+            if self.is_lxc:
+                t = "Read-access has been disabled due to failsafe: Docker detected, but %s. This failsafe is to prevent unintended access if this is due to accidental loss of config. You can override this safeguard and allow read/write to all of /w/ by adding the following arguments to the docker container:  -v .::rw"
+                if len(cfg_files_loaded) == 1:
+                    self.log(t % ("no config-file was provided",), 1)
+                    t = "it is strongly recommended to add a config-file instead, for example based on https://github.com/9001/copyparty/blob/hovudstraum/docs/examples/docker/basic-docker-compose/copyparty.conf"
+                    self.log(t, 3)
+                else:
+                    self.log(t % ("the config does not define any volumes",), 1)
                axs = AXS()
            elif self.args.c:
                t = "Read-access has been disabled due to failsafe: No volumes were defined by the config-file. This failsafe is to prevent unintended access if this is due to accidental loss of config. You can override this safeguard and allow read/write to the working-directory by adding the following arguments:  -v .::rw"
@@ -1578,7 +1630,7 @@ class AuthSrv(object):
                axs = AXS()
            vfs = VFS(self.log_func, absreal("."), "", "", axs, {})
            if not axs.uread:
-                vfs.badcfg1 = True
+                self.badcfg1 = True
        elif "" not in mount:
            # there's volumes but no root; make root inaccessible
            zsd = {"d2d": True, "tcolor": self.args.tcolor}
@@ -1629,7 +1681,7 @@ class AuthSrv(object):
        shr = enshare[1:-1]
        shrs = enshare[1:]
        if enshare:
-            import sqlite3
+            assert sqlite3  # type: ignore  # !rm

            zsd = {"d2d": True, "tcolor": self.args.tcolor}
            shv = VFS(self.log_func, "", shr, shr, AXS(), zsd)
@@ -1852,7 +1904,7 @@ class AuthSrv(object):
            is_shr = shr and zv.vpath.split("/")[0] == shr
            if histp and not is_shr and histp in rhisttab:
                zv2 = rhisttab[histp]
-                t = "invalid config; multiple volumes share the same histpath (database+thumbnails location):\n  histpath: %s\n  volume 1: /%s  [%s]\n  volume 2: %s  [%s]"
+                t = "invalid config; multiple volumes share the same histpath (database+thumbnails location):\n  histpath: %s\n  volume 1: /%s  [%s]\n  volume 2: /%s  [%s]"
                t = t % (histp, zv2.vpath, zv2.realpath, zv.vpath, zv.realpath)
                self.log(t, 1)
                raise Exception(t)
@@ -1866,7 +1918,7 @@ class AuthSrv(object):
            is_shr = shr and zv.vpath.split("/")[0] == shr
            if dbp and not is_shr and dbp in rdbpaths:
                zv2 = rdbpaths[dbp]
-                t = "invalid config; multiple volumes share the same dbpath (database location):\n  dbpath: %s\n  volume 1: /%s  [%s]\n  volume 2: %s  [%s]"
+                t = "invalid config; multiple volumes share the same dbpath (database location):\n  dbpath: %s\n  volume 1: /%s  [%s]\n  volume 2: /%s  [%s]"
                t = t % (dbp, zv2.vpath, zv2.realpath, zv.vpath, zv.realpath)
                self.log(t, 1)
                raise Exception(t)
@@ -2049,12 +2101,13 @@ class AuthSrv(object):
                if vf not in vol.flags:
                    vol.flags[vf] = getattr(self.args, ga)

-            zs = "forget_ip nrand u2abort u2ow ups_who zip_who"
+            zs = "forget_ip nrand tail_who u2abort u2ow ups_who zip_who"
            for k in zs.split():
                if k in vol.flags:
                    vol.flags[k] = int(vol.flags[k])

-            for k in ("convt",):
+            zs = "convt tail_fd tail_rate tail_tmax"
+            for k in zs.split():
                if k in vol.flags:
                    vol.flags[k] = float(vol.flags[k])

@@ -2383,7 +2436,7 @@ class AuthSrv(object):
            idp_vn, _ = vfs.get(idp_vp, "*", False, False)
            idp_vp0 = idp_vn.vpath0

-            sigils = set(re.findall(r"(\${[ug][}%])", idp_vp0))
+            sigils = set(PTN_SIGIL.findall(idp_vp0))
            if len(sigils) > 1:
                t = '\nWARNING: IdP-volume "/%s" created by "/%s" has multiple IdP placeholders: %s'
                self.idp_warn.append(t % (idp_vp, idp_vp0, list(sigils)))
@@ -2433,6 +2486,7 @@ class AuthSrv(object):
        self.defpw = defpw
        self.grps = grps
        self.iacct = {v: k for k, v in acct.items()}
+        self.cfg_files_loaded = cfg_files_loaded

        self.load_sessions()

@@ -2552,6 +2606,7 @@ class AuthSrv(object):
                "txt_ext": self.args.textfiles.replace(",", " "),
                "def_hcols": list(vf.get("mth") or []),
                "unlist0": vf.get("unlist") or "",
+                "see_dots": self.args.see_dots,
                "dgrid": "grid" in vf,
                "dgsel": "gsel" in vf,
                "dnsort": "nsort" in vf,
@@ -2563,6 +2618,7 @@ class AuthSrv(object):
                "idxh": int(self.args.ih),
                "themes": self.args.themes,
                "turbolvl": self.args.turbo,
+                "nosubtle": self.args.nosubtle,
                "u2j": self.args.u2j,
                "u2sz": self.args.u2sz,
                "u2ts": vf["u2ts"],
@@ -2591,6 +2647,43 @@ class AuthSrv(object):
            zs = str(vol.flags.get("tcolor") or self.args.tcolor)
            vol.flags["tcolor"] = zs.lstrip("#")

+    def load_idp_db(self, quiet=False) -> None:
+        # mutex me
+        level = self.args.idp_store
+        if level < 2 or not self.args.idp_h_usr:
+            return
+
+        assert sqlite3  # type: ignore  # !rm
+
+        db = sqlite3.connect(self.args.idp_db)
+        cur = db.cursor()
+        from_cache = cur.execute("select un, gs from us").fetchall()
+        cur.close()
+        db.close()
+
+        self.idp_accs.clear()
+        self.idp_usr_gh.clear()
+
+        gsep = self.args.idp_gsep
+        n = []
+        for uname, gname in from_cache:
+            if level < 3:
+                if uname in self.idp_accs:
+                    continue
+                gname = ""
+            gnames = [x.strip() for x in gsep.split(gname)]
+            gnames.sort()
+
+            # self.idp_usr_gh[uname] = gname
+            self.idp_accs[uname] = gnames
+            n.append(uname)
+
+        if n and not quiet:
+            t = ", ".join(n[:9])
+            if len(n) > 9:
+                t += "..."
+            self.log("found %d IdP users in db (%s)" % (len(n), t))
+
    def load_sessions(self, quiet=False) -> None:
        # mutex me
        if self.args.no_ses:
@@ -2598,7 +2691,7 @@ class AuthSrv(object):
            self.sesa = {}
            return

-        import sqlite3
+        assert sqlite3  # type: ignore  # !rm

        ases = {}
        blen = (self.args.ses_len // 4) * 4  # 3 bytes in 4 chars
@@ -2645,7 +2738,7 @@ class AuthSrv(object):
        if self.args.no_ses:
            return

-        import sqlite3
+        assert sqlite3  # type: ignore  # !rm

        db = sqlite3.connect(self.args.ses_db)
        cur = db.cursor()
--- a/copyparty/cfg.py
+++ b/copyparty/cfg.py
@@ -22,6 +22,7 @@ def vf_bmap() -> dict[str, str]:
        "no_forget": "noforget",
        "no_pipe": "nopipe",
        "no_robots": "norobots",
+        "no_tail": "notail",
        "no_thumb": "dthumb",
        "no_vthumb": "dvthumb",
        "no_athumb": "dathumb",
@@ -51,6 +52,7 @@ def vf_bmap() -> dict[str, str]:
        "og_no_head",
        "og_s_title",
        "rand",
+        "rmagic",
        "rss",
        "wo_up_readme",
        "xdev",
@@ -101,6 +103,10 @@ def vf_vmap() -> dict[str, str]:
        "mv_retry",
        "rm_retry",
        "sort",
+        "tail_fd",
+        "tail_rate",
+        "tail_tmax",
+        "tail_who",
        "tcolor",
        "unlist",
        "u2abort",
@@ -304,6 +310,13 @@ flagcats = {
        "exp_md": "placeholders to expand in markdown files; see --help",
        "exp_lg": "placeholders to expand in prologue/epilogue; see --help",
    },
+    "tailing": {
+        "notail": "disable ?tail (download a growing file continuously)",
+        "tail_fd=1": "check if file was replaced (new fd) every 1 sec",
+        "tail_rate=0.2": "check for new data every 0.2 sec",
+        "tail_tmax=30": "kill connection after 30 sec",
+        "tail_who=2": "restrict ?tail access (1=admins,2=authed,3=everyone)",
+    },
    "others": {
        "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',
@@ -312,6 +325,7 @@ flagcats = {
        "dks": "per-directory accesskeys allow browsing into subdirs",
        "dky": 'allow seeing files (not folders) inside a specific folder\nwith "g" perm, and does not require a valid dirkey to do so',
        "rss": "allow '?rss' URL suffix (experimental)",
+        "rmagic": "expensive analysis for mimetype accuracy",
        "ups_who=2": "restrict viewing the list of recent uploads",
        "zip_who=2": "restrict access to download-as-zip/tar",
        "zipmaxn=9k": "reject download-as-zip if more than 9000 files",
--- a/copyparty/httpcli.py
+++ b/copyparty/httpcli.py
@@ -189,11 +189,11 @@ class HttpCli(object):
        self.log_src = conn.log_src  # mypy404
        self.gen_fk = self._gen_fk if self.args.log_fk else gen_filekey
        self.tls: bool = hasattr(self.s, "cipher")
+        self.is_vproxied = bool(self.args.R)

        # placeholders; assigned by run()
        self.keepalive = False
        self.is_https = False
-        self.is_vproxied = False
        self.in_hdr_recv = True
        self.headers: dict[str, str] = {}
        self.mode = " "  # http verb
@@ -401,7 +401,6 @@ class HttpCli(object):
                    self.bad_xff = True
                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
@@ -534,6 +533,7 @@ class HttpCli(object):
            else:
                t = "incorrect --rp-loc or webserver config; expected vpath starting with %r but got %r"
                self.log(t % (self.args.R, vpath), 1)
+                self.is_vproxied = False

        self.ouparam = uparam.copy()

@@ -1233,10 +1233,19 @@ class HttpCli(object):
                else:
                    return self.tx_404(True)
            else:
-                vfs = self.asrv.vfs
-                if vfs.badcfg1:
-                    t = "<h2>access denied due to failsafe; check server log</h2>"
-                    html = self.j2s("splash", this=self, msg=t)
+                if (
+                    self.asrv.badcfg1
+                    and "h" not in self.ouparam
+                    and "hc" not in self.ouparam
+                ):
+                    zs1 = "copyparty refused to start due to a failsafe: invalid server config; check server log"
+                    zs2 = 'you may <a href="/?h">access the controlpanel</a> but nothing will work until you shutdown the copyparty container and %s config-file (or provide the configuration as command-line arguments)'
+                    if self.asrv.is_lxc and len(self.asrv.cfg_files_loaded) == 1:
+                        zs2 = zs2 % ("add a",)
+                    else:
+                        zs2 = zs2 % ("fix the",)
+
+                    html = self.j2s("msg", h1=zs1, h2=zs2)
                    self.reply(html.encode("utf-8", "replace"), 500)
                    return True

@@ -1290,6 +1299,9 @@ class HttpCli(object):
            if "ru" in self.uparam:
                return self.tx_rups()

+            if "idp" in self.uparam:
+                return self.tx_idp()
+
        if "h" in self.uparam:
            return self.tx_mounts()

@@ -1403,7 +1415,13 @@ class HttpCli(object):
        except:
            pass

+        ap = ""
+        use_magic = "rmagic" in self.vn.flags
+
        for i in hits:
+            if use_magic:
+                ap = os.path.join(self.vn.realpath, i["rp"])
+
            iurl = html_escape("%s%s" % (baseurl, i["rp"]), True, True)
            title = unquotep(i["rp"].split("?")[0].split("/")[-1])
            title = html_escape(title, True, True)
@@ -1411,7 +1429,7 @@ class HttpCli(object):
            tag_a = str(i["tags"].get("artist") or "")
            desc = "%s - %s" % (tag_a, tag_t) if tag_t and tag_a else (tag_t or tag_a)
            desc = html_escape(desc, True, True) if desc else title
-            mime = html_escape(guess_mime(title))
+            mime = html_escape(guess_mime(title, ap))
            lmod = formatdate(max(0, i["ts"]))
            zsa = (iurl, iurl, title, desc, lmod, iurl, mime, i["sz"])
            zs = (
@@ -1564,6 +1582,9 @@ class HttpCli(object):
            None, 207, "text/xml; charset=" + enc, {"Transfer-Encoding": "chunked"}
        )

+        ap = ""
+        use_magic = "rmagic" in vn.flags
+
        ret = '<?xml version="1.0" encoding="{}"?>\n<D:multistatus xmlns:D="DAV:">'
        ret = ret.format(uenc)
        for x in fgen:
@@ -1590,7 +1611,9 @@ class HttpCli(object):
                "supportedlock": '<D:lockentry xmlns:D="DAV:"><D:lockscope><D:exclusive/></D:lockscope><D:locktype><D:write/></D:locktype></D:lockentry>',
            }
            if not isdir:
-                pvs["getcontenttype"] = html_escape(guess_mime(rp))
+                if use_magic:
+                    ap = os.path.join(tap, x["vp"])
+                pvs["getcontenttype"] = html_escape(guess_mime(rp, ap))
                pvs["getcontentlength"] = str(st.st_size)

            for k, v in pvs.items():
@@ -2587,10 +2610,6 @@ class HttpCli(object):
            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"]
-
        if self.args.shr and self.vpath.startswith(self.args.shr1):
            # strip common suffix (uploader's folder structure)
            vp_req, vp_vfs = vroots(self.vpath, vjoin(dbv.vpath, vrem))
@@ -2600,6 +2619,10 @@ class HttpCli(object):
                raise Pebkac(500, t % zt)
            ret["purl"] = vp_req + ret["purl"][len(vp_vfs) :]

+        if self.is_vproxied:
+            if "purl" in ret:
+                ret["purl"] = self.args.SR + ret["purl"]
+
        ret = json.dumps(ret)
        self.log(ret)
        self.reply(ret.encode("utf-8"), mime="application/json")
@@ -2707,6 +2730,7 @@ class HttpCli(object):
        locked = chashes  # remaining chunks to be received in this request
        written = []  # chunks written to disk, but not yet released by up2k
        num_left = -1  # num chunks left according to most recent up2k release
+        bail1 = False  # used in sad path to avoid contradicting error-text
        treport = time.time()  # ratelimit up2k reporting to reduce overhead

        if "x-up2k-subc" in self.headers:
@@ -2845,7 +2869,6 @@ class HttpCli(object):
            except:
                # maybe busted handle (eg. disk went full)
                f.close()
-                chashes = []  # exception flag
                raise
        finally:
            if locked:
@@ -2854,13 +2877,14 @@ class HttpCli(object):
                num_left, t = x.get()
                if num_left < 0:
                    self.loud_reply(t, status=500)
-                    if chashes:  # kills exception bubbling otherwise
-                        return False
+                    bail1 = True
                else:
                    t = "got %d more chunks, %d left"
                    self.log(t % (len(written), num_left), 6)

        if num_left < 0:
+            if bail1:
+                return False
            raise Pebkac(500, "unconfirmed; see serverlog")

        if not num_left and fpool:
@@ -3804,6 +3828,20 @@ class HttpCli(object):

        return txt

+    def _can_tail(self, volflags: dict[str, Any]) -> bool:
+        zp = self.args.ua_nodoc
+        if zp and zp.search(self.ua):
+            t = "this URL contains no valuable information for bots/crawlers"
+            raise Pebkac(403, t)
+        lvl = volflags["tail_who"]
+        if "notail" in volflags or not lvl:
+            raise Pebkac(400, "tail is disabled in server config")
+        elif lvl <= 1 and not self.can_admin:
+            raise Pebkac(400, "tail is admin-only on this server")
+        elif lvl <= 2 and self.uname in ("", "*"):
+            raise Pebkac(400, "you must be authenticated to use ?tail on this server")
+        return True
+
    def _can_zip(self, volflags: dict[str, Any]) -> str:
        lvl = volflags["zip_who"]
        if self.args.no_zip or not lvl:
@@ -3948,6 +3986,8 @@ class HttpCli(object):
        logmsg = "{:4} {} ".format("", self.req)
        logtail = ""

+        is_tail = "tail" in self.uparam and self._can_tail(self.vn.flags)
+
        if ptop is not None:
            ap_data = "<%s>" % (req_path,)
            try:
@@ -4061,6 +4101,7 @@ class HttpCli(object):
            and can_range
            and file_sz
            and "," not in hrange
+            and not is_tail
        ):
            try:
                if not hrange.lower().startswith("bytes"):
@@ -4129,6 +4170,8 @@ class HttpCli(object):
            mime = "text/plain; charset={}".format(self.uparam["txt"] or "utf-8")
        elif "mime" in self.uparam:
            mime = str(self.uparam.get("mime"))
+        elif "rmagic" in self.vn.flags:
+            mime = guess_mime(req_path, fs_path)
        else:
            mime = guess_mime(req_path)

@@ -4146,13 +4189,18 @@ class HttpCli(object):
            return True

        dls = self.conn.hsrv.dls
+        if is_tail:
+            upper = 1 << 30
+            if len(dls) > self.args.tail_cmax:
+                raise Pebkac(400, "too many active downloads to start a new tail")
+
        if upper - lower > 0x400000:  # 4m
            now = time.time()
            self.dl_id = "%s:%s" % (self.ip, self.addr[1])
            dls[self.dl_id] = (now, 0)
            self.conn.hsrv.dli[self.dl_id] = (
                now,
-                upper - lower,
+                0 if is_tail else upper - lower,
                self.vn,
                self.vpath,
                self.uname,
@@ -4163,6 +4211,9 @@ class HttpCli(object):
            return self.tx_pipe(
                ptop, req_path, ap_data, job, lower, upper, status, mime, logmsg
            )
+        elif is_tail:
+            self.tx_tail(open_args, status, mime)
+            return False

        ret = True
        with open_func(*open_args) as f:
@@ -4192,6 +4243,133 @@ class HttpCli(object):

        return ret

+    def tx_tail(
+        self,
+        open_args: list[Any],
+        status: int,
+        mime: str,
+    ) -> None:
+        vf = self.vn.flags
+        self.send_headers(length=None, status=status, mime=mime)
+        abspath: bytes = open_args[0]
+        sec_rate = vf["tail_rate"]
+        sec_max = vf["tail_tmax"]
+        sec_fd = vf["tail_fd"]
+        sec_ka = self.args.tail_ka
+        wr_slp = self.args.s_wr_slp
+        wr_sz = self.args.s_wr_sz
+        dls = self.conn.hsrv.dls
+        dl_id = self.dl_id
+
+        # non-numeric = full file from start
+        # positive = absolute offset from start
+        # negative = start that many bytes from eof
+        try:
+            ofs = int(self.uparam["tail"])
+        except:
+            ofs = 0
+
+        t0 = time.time()
+        ofs0 = ofs
+        f = None
+        try:
+            st = os.stat(abspath)
+            f = open(*open_args)
+            f.seek(0, os.SEEK_END)
+            eof = f.tell()
+            f.seek(0)
+            if ofs < 0:
+                ofs = max(0, ofs + eof)
+
+            self.log("tailing from byte %d: %r" % (ofs, abspath), 6)
+
+            # send initial data asap
+            remains = sendfile_py(
+                self.log,  # d/c
+                ofs,
+                eof,
+                f,
+                self.s,
+                wr_sz,
+                wr_slp,
+                False,  # d/c
+                dls,
+                dl_id,
+            )
+            sent = (eof - ofs) - remains
+            ofs = eof - remains
+            f.seek(ofs)
+
+            try:
+                st2 = os.stat(open_args[0])
+                if st.st_ino == st2.st_ino:
+                    st = st2  # for filesize
+            except:
+                pass
+
+            gone = 0
+            t_fd = t_ka = time.time()
+            while True:
+                assert f  # !rm
+                buf = f.read(4096)
+                now = time.time()
+
+                if sec_max and now - t0 >= sec_max:
+                    self.log("max duration exceeded; kicking client", 6)
+                    zb = b"\n\n*** max duration exceeded; disconnecting ***\n"
+                    self.s.sendall(zb)
+                    break
+
+                if buf:
+                    t_fd = t_ka = now
+                    self.s.sendall(buf)
+                    sent += len(buf)
+                    dls[dl_id] = (time.time(), sent)
+                    continue
+
+                time.sleep(sec_rate)
+                if t_ka < now - sec_ka:
+                    t_ka = now
+                    self.s.send(b"\x00")
+                if t_fd < now - sec_fd:
+                    try:
+                        st2 = os.stat(open_args[0])
+                        if (
+                            st2.st_ino != st.st_ino
+                            or st2.st_size < sent
+                            or st2.st_size < st.st_size
+                        ):
+                            assert f  # !rm
+                            # open new file before closing previous to avoid toctous (open may fail; cannot null f before)
+                            f2 = open(*open_args)
+                            f.close()
+                            f = f2
+                            f.seek(0, os.SEEK_END)
+                            eof = f.tell()
+                            if eof < sent:
+                                ofs = sent = 0  # shrunk; send from start
+                                zb = b"\n\n*** file size decreased -- rewinding to the start of the file ***\n\n"
+                                self.s.sendall(zb)
+                                if ofs0 < 0 and eof > -ofs0:
+                                    ofs = eof + ofs0
+                            else:
+                                ofs = sent  # just new fd? resume from same ofs
+                            f.seek(ofs)
+                            self.log("reopened at byte %d: %r" % (ofs, abspath), 6)
+                            gone = 0
+                        st = st2
+                    except:
+                        gone += 1
+                        if gone > 3:
+                            self.log("file deleted; disconnecting")
+                            break
+        except IOError as ex:
+            if ex.errno not in (errno.EPIPE, errno.ESHUTDOWN, errno.EBADFD):
+                raise
+        finally:
+            if f:
+                f.close()
+
    def tx_pipe(
        self,
        ptop: str,
@@ -4752,7 +4930,6 @@ class HttpCli(object):
            if zi == 2 or (zi == 1 and self.avol):
                dl_list = self.get_dls()
        for t0, t1, sent, sz, vp, dl_id, uname in dl_list:
-            rem = sz - sent
            td = max(0.1, now - t0)
            rd, fn = vsplit(vp)
            if not rd:
@@ -4926,15 +5103,24 @@ class HttpCli(object):
        return ""  # unhandled / fallthrough

    def scanvol(self) -> bool:
-        if not self.can_admin:
-            raise Pebkac(403, "'scanvol' not allowed for user " + self.uname)
-
        if self.args.no_rescan:
            raise Pebkac(403, "the rescan feature is disabled in server config")

-        vn, _ = self.asrv.vfs.get(self.vpath, self.uname, True, True)
+        vpaths = self.uparam["scan"].split(",/")
+        if vpaths == [""]:
+            vpaths = [self.vpath]

-        args = [self.asrv.vfs.all_vols, [vn.vpath], False, True]
+        vols = []
+        for vpath in vpaths:
+            vn, _ = self.asrv.vfs.get(vpath, self.uname, True, True)
+            vols.append(vn.vpath)
+            if self.uname not in vn.axs.uadmin:
+                self.log("rejected scanning [%s] => [%s];" % (vpath, vn.vpath), 3)
+                raise Pebkac(403, "'scanvol' not allowed for user " + self.uname)
+
+        self.log("trying to rescan %d volumes: %r" % (len(vols), vols))
+
+        args = [self.asrv.vfs.all_vols, vols, False, True]

        x = self.conn.hsrv.broker.ask("up2k.rescan", *args)
        err = x.get()
@@ -5354,6 +5540,32 @@ class HttpCli(object):
        self.reply(html.encode("utf-8"), status=200)
        return True

+    def tx_idp(self) -> bool:
+        if self.uname.lower() not in self.args.idp_adm_set:
+            raise Pebkac(403, "'idp' not allowed for user " + self.uname)
+
+        cmd = self.uparam["idp"]
+        if cmd.startswith("rm="):
+            import sqlite3
+
+            db = sqlite3.connect(self.args.idp_db)
+            db.execute("delete from us where un=?", (cmd[3:],))
+            db.commit()
+            db.close()
+
+            self.conn.hsrv.broker.ask("reload", False, False).get()
+
+            self.redirect("", "?idp")
+            return True
+
+        rows = [
+            [k, "[%s]" % ("], [".join(v))]
+            for k, v in sorted(self.asrv.idp_accs.items())
+        ]
+        html = self.j2s("idp", this=self, rows=rows, now=int(time.time()))
+        self.reply(html.encode("utf-8"), status=200)
+        return True
+
    def tx_shares(self) -> bool:
        if self.uname == "*":
            self.loud_reply("you're not logged in")
@@ -5428,7 +5640,7 @@ class HttpCli(object):
            self.conn.hsrv.broker.ask("reload", False, False).get()
            self.conn.hsrv.broker.ask("up2k.wake_rescanner").get()

-        self.redirect(self.args.SRS + "?shares")
+        self.redirect("", "?shares")
        return True

    def handle_share(self, req: dict[str, str]) -> bool:
--- a/copyparty/httpconn.py
+++ b/copyparty/httpconn.py
@@ -224,3 +224,6 @@ class HttpConn(object):
            if self.u2idx:
                self.hsrv.put_u2idx(str(self.addr), self.u2idx)
                self.u2idx = None
+
+            if self.rproxy:
+                self.set_rproxy()
--- a/copyparty/httpsrv.py
+++ b/copyparty/httpsrv.py
@@ -175,6 +175,7 @@ class HttpSrv(object):
            "browser",
            "browser2",
            "cf",
+            "idp",
            "md",
            "mde",
            "msg",
@@ -313,6 +314,8 @@ class HttpSrv(object):

        Daemon(self.broker.say, "sig-hsrv-up1", ("cb_httpsrv_up",))

+        saddr = ("", 0)  # fwd-decl for `except TypeError as ex:`
+
        while not self.stopping:
            if self.args.log_conn:
                self.log(self.name, "|%sC-ncli" % ("-" * 1,), c="90")
@@ -394,6 +397,19 @@ class HttpSrv(object):
                self.log(self.name, "accept({}): {}".format(fno, ex), c=6)
                time.sleep(0.02)
                continue
+            except TypeError as ex:
+                # on macOS, accept() may return a None saddr if blocked by LittleSnitch;
+                # unicode(saddr[0]) ==> TypeError: 'NoneType' object is not subscriptable
+                if tcp and not saddr:
+                    t = "accept(%s): failed to accept connection from client due to firewall or network issue"
+                    self.log(self.name, t % (fno,), c=3)
+                    try:
+                        sck.close()  # type: ignore
+                    except:
+                        pass
+                    time.sleep(0.02)
+                    continue
+                raise

            if self.args.log_conn:
                t = "|{}C-acc2 \033[0;36m{} \033[3{}m{}".format(
--- a/copyparty/svchub.py
+++ b/copyparty/svchub.py
@@ -88,6 +88,7 @@ if PY2:
    range = xrange  # type: ignore


+VER_IDP_DB = 1
 VER_SESSION_DB = 1
 VER_SHARES_DB = 2

@@ -258,11 +259,15 @@ class SvcHub(object):
                self.log("root", "effective %s is %s" % (zs, getattr(args, zs)))

        if args.ah_cli or args.ah_gen:
+            args.idp_store = 0
            args.no_ses = True
            args.shr = ""

+        if args.idp_store and args.idp_h_usr:
+            self.setup_db("idp")
+
        if not self.args.no_ses:
-            self.setup_session_db()
+            self.setup_db("ses")

        args.shr1 = ""
        if args.shr:
@@ -421,26 +426,58 @@ class SvcHub(object):
            except:
                pass

-    def setup_session_db(self) -> None:
+    def _db_onfail_ses(self) -> None:
+        self.args.no_ses = True
+
+    def _db_onfail_idp(self) -> None:
+        self.args.idp_store = 0
+
+    def setup_db(self, which: str) -> None:
+        """
+        the "non-mission-critical" databases; if something looks broken then just nuke it
+        """
+        if which == "ses":
+            native_ver = VER_SESSION_DB
+            db_path = self.args.ses_db
+            desc = "sessions-db"
+            pathopt = "ses-db"
+            sanchk_q = "select count(*) from us"
+            createfun = self._create_session_db
+            failfun = self._db_onfail_ses
+        elif which == "idp":
+            native_ver = VER_IDP_DB
+            db_path = self.args.idp_db
+            desc = "idp-db"
+            pathopt = "idp-db"
+            sanchk_q = "select count(*) from us"
+            createfun = self._create_idp_db
+            failfun = self._db_onfail_idp
+        else:
+            raise Exception("unknown cachetype")
+
+        if not db_path.endswith(".db"):
+            zs = "config option --%s (the %s) was configured to [%s] which is invalid; must be a filepath ending with .db"
+            self.log("root", zs % (pathopt, desc, db_path), 1)
+            raise Exception(BAD_CFG)
+
        if not HAVE_SQLITE3:
-            self.args.no_ses = True
-            t = "WARNING: sqlite3 not available; disabling sessions, will use plaintext passwords in cookies"
-            self.log("root", t, 3)
+            failfun()
+            if which == "ses":
+                zs = "disabling sessions, will use plaintext passwords in cookies"
+            elif which == "idp":
+                zs = "disabling idp-db, will be unable to remember IdP-volumes after a restart"
+            self.log("root", "WARNING: sqlite3 not available; %s" % (zs,), 3)
            return

        assert sqlite3  # type: ignore  # !rm

-        # policy:
-        # the sessions-db is whatever, if something looks broken then just nuke it
-
-        db_path = self.args.ses_db
        db_lock = db_path + ".lock"
        try:
            create = not os.path.getsize(db_path)
        except:
            create = True
        zs = "creating new" if create else "opening"
-        self.log("root", "%s sessions-db %s" % (zs, db_path))
+        self.log("root", "%s %s %s" % (zs, desc, db_path))

        for tries in range(2):
            sver = 0
@@ -450,17 +487,19 @@ class SvcHub(object):
                try:
                    zs = "select v from kv where k='sver'"
                    sver = cur.execute(zs).fetchall()[0][0]
-                    if sver > VER_SESSION_DB:
-                        zs = "this version of copyparty only understands session-db v%d and older; the db is v%d"
-                        raise Exception(zs % (VER_SESSION_DB, sver))
+                    if sver > native_ver:
+                        zs = "this version of copyparty only understands %s v%d and older; the db is v%d"
+                        raise Exception(zs % (desc, native_ver, sver))

-                    cur.execute("select count(*) from us").fetchone()
+                    cur.execute(sanchk_q).fetchone()
                except:
                    if sver:
                        raise
-                    sver = 1
-                    self._create_session_db(cur)
-                err = self._verify_session_db(cur, sver, db_path)
+                    sver = createfun(cur)
+
+                err = self._verify_db(
+                    cur, which, pathopt, db_path, desc, sver, native_ver
+                )
                if err:
                    tries = 99
                    self.args.no_ses = True
@@ -468,10 +507,10 @@ class SvcHub(object):
                break

            except Exception as ex:
-                if tries or sver > VER_SESSION_DB:
+                if tries or sver > native_ver:
                    raise
-                t = "sessions-db is unusable; deleting and recreating: %r"
-                self.log("root", t % (ex,), 3)
+                t = "%s is unusable; deleting and recreating: %r"
+                self.log("root", t % (desc, ex), 3)
                try:
                    cur.close()  # type: ignore
                except:
@@ -486,7 +525,7 @@ class SvcHub(object):
                    pass
                os.unlink(db_path)

-    def _create_session_db(self, cur: "sqlite3.Cursor") -> None:
+    def _create_session_db(self, cur: "sqlite3.Cursor") -> int:
        sch = [
            r"create table kv (k text, v int)",
            r"create table us (un text, si text, t0 int)",
@@ -499,8 +538,31 @@ class SvcHub(object):
        for cmd in sch:
            cur.execute(cmd)
        self.log("root", "created new sessions-db")
+        return 1

-    def _verify_session_db(self, cur: "sqlite3.Cursor", sver: int, db_path: str) -> str:
+    def _create_idp_db(self, cur: "sqlite3.Cursor") -> int:
+        sch = [
+            r"create table kv (k text, v int)",
+            r"create table us (un text, gs text)",
+            # username, groups
+            r"create index us_un on us(un)",
+            r"insert into kv values ('sver', 1)",
+        ]
+        for cmd in sch:
+            cur.execute(cmd)
+        self.log("root", "created new idp-db")
+        return 1
+
+    def _verify_db(
+        self,
+        cur: "sqlite3.Cursor",
+        which: str,
+        pathopt: str,
+        db_path: str,
+        desc: str,
+        sver: int,
+        native_ver: int,
+    ) -> str:
        # ensure writable (maybe owned by other user)
        db = cur.connection

@@ -512,9 +574,16 @@ class SvcHub(object):
        except:
            owner = 0

+        if which == "ses":
+            cons = "Will now disable sessions and instead use plaintext passwords in cookies."
+        elif which == "idp":
+            cons = "Each IdP-volume will not become available until its associated user sends their first request."
+        else:
+            raise Exception()
+
        if not lock_file(db_path + ".lock"):
-            t = "the sessions-db [%s] is already in use by another copyparty instance (pid:%d). This is not supported; please provide another database with --ses-db or give this copyparty-instance its entirely separate config-folder by setting another path in the XDG_CONFIG_HOME env-var. You can also disable this safeguard by setting env-var PRTY_NO_DB_LOCK=1. Will now disable sessions and instead use plaintext passwords in cookies."
-            return t % (db_path, owner)
+            t = "the %s [%s] is already in use by another copyparty instance (pid:%d). This is not supported; please provide another database with --%s or give this copyparty-instance its entirely separate config-folder by setting another path in the XDG_CONFIG_HOME env-var. You can also disable this safeguard by setting env-var PRTY_NO_DB_LOCK=1. %s"
+            return t % (desc, db_path, owner, pathopt, cons)

        vars = (("pid", os.getpid()), ("ts", int(time.time() * 1000)))
        if owner:
@@ -526,9 +595,9 @@ class SvcHub(object):
            for k, v in vars:
                cur.execute("insert into kv values(?, ?)", (k, v))

-        if sver < VER_SESSION_DB:
+        if sver < native_ver:
            cur.execute("delete from kv where k='sver'")
-            cur.execute("insert into kv values('sver',?)", (VER_SESSION_DB,))
+            cur.execute("insert into kv values('sver',?)", (native_ver,))

        db.commit()
        cur.close()
@@ -880,6 +949,12 @@ class SvcHub(object):
                vs = os.path.expandvars(os.path.expanduser(vs))
                setattr(al, k, vs)

+        for k in "idp_adm".split(" "):
+            vs = getattr(al, k)
+            vsa = [x.strip() for x in vs.split(",")]
+            vsa = [x.lower() for x in vsa if x]
+            setattr(al, k + "_set", set(vsa))
+
        zs = "dav_ua1 sus_urls nonsus_urls ua_nodoc ua_nozip"
        for k in zs.split(" "):
            vs = getattr(al, k)
--- a/copyparty/th_srv.py
+++ b/copyparty/th_srv.py
@@ -96,6 +96,10 @@ try:
        if os.environ.get("PRTY_NO_PIL_AVIF"):
            raise Exception()

+        if ".avif" in Image.registered_extensions():
+            HAVE_AVIF = True
+            raise Exception()
+
        import pillow_avif  # noqa: F401  # pylint: disable=unused-import

        HAVE_AVIF = True
--- a/copyparty/util.py
+++ b/copyparty/util.py
@@ -153,6 +153,14 @@ try:
 except:
    HAVE_PSUTIL = False

+try:
+    if os.environ.get("PRTY_NO_MAGIC"):
+        raise Exception()
+
+    import magic
+except:
+    pass
+
 if True:  # pylint: disable=using-constant-test
    import types
    from collections.abc import Callable, Iterable
@@ -175,8 +183,6 @@ if True:  # pylint: disable=using-constant-test


 if TYPE_CHECKING:
-    import magic
-
    from .authsrv import VFS
    from .broker_util import BrokerCli
    from .up2k import Up2k
@@ -1256,8 +1262,6 @@ class Magician(object):
        self.magic: Optional["magic.Magic"] = None

    def ext(self, fpath: str) -> str:
-        import magic
-
        try:
            if self.bad_magic:
                raise Exception()
@@ -3152,11 +3156,13 @@ def unescape_cookie(orig: str) -> str:
    return "".join(ret)


-def guess_mime(url: str, fallback: str = "application/octet-stream") -> str:
+def guess_mime(
+    url: str, path: str = "", fallback: str = "application/octet-stream"
+) -> str:
    try:
        ext = url.rsplit(".", 1)[1].lower()
    except:
-        return fallback
+        ext = ""

    ret = MIMES.get(ext)

@@ -3164,6 +3170,16 @@ def guess_mime(url: str, fallback: str = "application/octet-stream") -> str:
        x = mimetypes.guess_type(url)
        ret = "application/{}".format(x[1]) if x[1] else x[0]

+    if not ret and path:
+        try:
+            with open(fsenc(path), "rb", 0) as f:
+                ret = magic.from_buffer(f.read(4096), mime=True)
+                if ret.startswith("text/htm"):
+                    # avoid serving up HTML content unless there was actually a .html extension
+                    ret = "text/plain"
+        except Exception as ex:
+            pass
+
    if not ret:
        ret = fallback

--- a/copyparty/web/browser.css
+++ b/copyparty/web/browser.css
@@ -4,6 +4,8 @@
 	--grid-sz: 10em;
 	--grid-ln: 3;
 	--nav-sz: 16em;
+	--sbw: 0.5em;
+	--sbh: 0.5em;

 	--fg: #ccc;
 	--fg-max: #fff;
@@ -1558,8 +1560,8 @@ html {
 	z-index: 1;
 	position: fixed;
 	background: var(--tree-bg);
-	left: -.98em;
-	width: calc(var(--nav-sz) - 0.5em);
+	left: -.96em;
+	width: calc(.3em + var(--nav-sz) - var(--sbw));
 	border-bottom: 1px solid var(--bg-u5);
 	overflow: hidden;
 }
@@ -1825,10 +1827,11 @@ html.y #tree.nowrap .ntree a+a:hover {
 	line-height: 2.3em;
 	margin-bottom: 1.5em;
 }
+#hdoc,
 #ghead {
 	position: sticky;
 	top: -.3em;
-	z-index: 1;
+	z-index: 2;
 }
 .ghead .btn {
 	position: relative;
@@ -1838,6 +1841,13 @@ html.y #tree.nowrap .ntree a+a:hover {
 	white-space: pre;
 	padding-left: .3em;
 }
+#tailbtns {
+	display: none;
+}
+#taildoc.on+#tailbtns {
+	display: inherit;
+	display: unset;
+}
 #op_unpost {
 	padding: 1em;
 }
@@ -1934,6 +1944,9 @@ html.y #tree.nowrap .ntree a+a:hover {
 	padding: 1em 0 1em 0;
 	border-radius: .3em;
 }
+#doc.wrap {
+	white-space: pre-wrap;
+}
 html.y #doc {
 	box-shadow: 0 0 .3em var(--bg-u5);
 	background: #f7f7f7;
@@ -3055,7 +3068,8 @@ html.b .ntree a {
 	padding: .6em .2em;
 }
 html.b #treepar {
-	margin-left: .62em;
+	margin-left: .63em;
+	width: calc(.1em + var(--nav-sz) - var(--sbw));
 	border-bottom: .2em solid var(--f-h-b1);
 }
 html.b #wrap {
@@ -3227,7 +3241,7 @@ html.d #treepar {

  	#ggrid>a>span {
 		text-align: center;
-		padding: 0.2em;
+		padding: .2em .2em .15em .2em;
 	}
 }

--- a/copyparty/web/browser.js
+++ b/copyparty/web/browser.js
@@ -249,6 +249,8 @@ var Ls = {

 		"cut_mt": "use multithreading to accelerate file hashing$N$Nthis uses web-workers and requires$Nmore RAM (up to 512 MiB extra)$N$Nmakes https 30% faster, http 4.5x faster\">mt",

+		"cut_wasm": "use wasm instead of the browser's built-in hasher; improves speed on chrome-based browsers but increases CPU load, and many older versions of chrome have bugs which makes the browser consume all RAM and crash if this is enabled\">wasm",
+
 		"cft_text": "favicon text (blank and refresh to disable)",
 		"cft_fg": "foreground color",
 		"cft_bg": "background color",
@@ -335,6 +337,7 @@ var Ls = {
 		"f_empty": 'this folder is empty',
 		"f_chide": 'this will hide the column «{0}»\n\nyou can unhide columns in the settings tab',
 		"f_bigtxt": "this file is {0} MiB large -- really view as text?",
+		"f_bigtxt2": "view just the end of the file instead? this will also enable following/tailing, showing newly added lines of text in real time",
 		"fbd_more": '<div id="blazy">showing <code>{0}</code> of <code>{1}</code> files; <a href="#" id="bd_more">show {2}</a> or <a href="#" id="bd_all">show all</a></div>',
 		"fbd_all": '<div id="blazy">showing <code>{0}</code> of <code>{1}</code> files; <a href="#" id="bd_all">show all</a></div>',
 		"f_anota": "only {0} of the {1} items were selected;\nto select the full folder, first scroll to the bottom",
@@ -439,6 +442,11 @@ var Ls = {
 		"tvt_next": "show next document$NHotkey: K\">⬇ next",
 		"tvt_sel": "select file &nbsp; ( for cut / copy / delete / ... )$NHotkey: S\">sel",
 		"tvt_edit": "open file in text editor$NHotkey: E\">✏️ edit",
+		"tvt_tail": "monitor file for changes; show new lines in real time\">📡 follow",
+		"tvt_wrap": "word-wrap\">↵",
+		"tvt_atail": "lock scroll to bottom of page\">⚓",
+		"tvt_ctail": "decode terminal colors (ansi escape codes)\">🌈",
+		"tvt_ntail": "scrollback limit (how many bytes of text to keep loaded)",

 		"m3u_add1": "song added to m3u playlist",
 		"m3u_addn": "{0} songs added to m3u playlist",
@@ -538,6 +546,7 @@ var Ls = {
 		"u_https3": "for better performance",
 		"u_ancient": 'your browser is impressively ancient -- maybe you should <a href="#" onclick="goto(\'bup\')">use bup instead</a>',
 		"u_nowork": "need firefox 53+ or chrome 57+ or iOS 11+",
+		"tail_2old": "need firefox 105+ or chrome 71+ or iOS 14.5+",
 		"u_nodrop": 'your browser is too old for drag-and-drop uploading',
 		"u_notdir": "that's not a folder!\n\nyour browser is too old,\nplease try dragdrop instead",
 		"u_uri": "to dragdrop images from other browser windows,\nplease drop it onto the big upload button",
@@ -864,6 +873,8 @@ var Ls = {

 		"cut_mt": "raskere befaring ved å bruke hele CPU'en$N$Ndenne funksjonen anvender web-workers$Nog krever mer RAM (opptil 512 MiB ekstra)$N$Ngjør https 30% raskere, http 4.5x raskere\">mt",

+		"cut_wasm": "bruk wasm istedenfor nettleserens sha512-funksjon; gir bedre ytelse på chrome-baserte nettlesere, men bruker mere CPU, og eldre versjoner av chrome tåler det ikke (spiser opp all RAM og krasjer)\">wasm",
+
 		"cft_text": "ikontekst (blank ut og last siden på nytt for å deaktivere)",
 		"cft_fg": "farge",
 		"cft_bg": "bakgrunnsfarge",
@@ -950,6 +961,7 @@ var Ls = {
 		"f_empty": 'denne mappen er tom',
 		"f_chide": 'dette vil skjule kolonnen «{0}»\n\nfanen for "andre innstillinger" lar deg vise kolonnen igjen',
 		"f_bigtxt": "denne filen er hele {0} MiB -- vis som tekst?",
+		"f_bigtxt2": "vil du se bunnen av filen istedenfor? du vil da også se nye linjer som blir lagt til på slutten av filen i sanntid",
 		"fbd_more": '<div id="blazy">viser <code>{0}</code> av <code>{1}</code> filer; <a href="#" id="bd_more">vis {2}</a> eller <a href="#" id="bd_all">vis alle</a></div>',
 		"fbd_all": '<div id="blazy">viser <code>{0}</code> av <code>{1}</code> filer; <a href="#" id="bd_all">vis alle</a></div>',
 		"f_anota": "kun {0} av totalt {1} elementer ble markert;\nfor å velge alt må du bla til bunnen av mappen først",
@@ -1054,6 +1066,11 @@ var Ls = {
 		"tvt_next": "vis neste dokument$NSnarvei: K\">⬇ neste",
 		"tvt_sel": "markér filen &nbsp; ( for utklipp / sletting / ... )$NSnarvei: S\">merk",
 		"tvt_edit": "redigér filen$NSnarvei: E\">✏️ endre",
+		"tvt_tail": "overvåk filen for endringer og vis nye linjer i sanntid\">📡 følg",
+		"tvt_wrap": "tekstbryting\">↵",
+		"tvt_atail": "hold de nyeste linjene synlig (lås til bunnen av siden)\">⚓",
+		"tvt_ctail": "forstå og vis terminalfarger (ansi-sekvenser)\">🌈",
+		"tvt_ntail": "maks-grense for antall bokstaver som skal vises i vinduet",

 		"m3u_add1": "sangen ble lagt til i m3u-spillelisten",
 		"m3u_addn": "{0} sanger ble lagt til i m3u-spillelisten",
@@ -1153,6 +1170,7 @@ var Ls = {
 		"u_https3": "for høyere hastighet",
 		"u_ancient": 'nettleseren din er prehistorisk -- mulig du burde <a href="#" onclick="goto(\'bup\')">bruke bup istedenfor</a>',
 		"u_nowork": "krever firefox 53+, chrome 57+, eller iOS 11+",
+		"tail_2old": "krever firefox 105+, chrome 71+, eller iOS 14.5+",
 		"u_nodrop": 'nettleseren din er for gammel til å laste opp filer ved å dra dem inn i vinduet',
 		"u_notdir": "mottok ikke mappen!\n\nnettleseren din er for gammel,\nprøv å dra mappen inn i vinduet istedenfor",
 		"u_uri": "for å laste opp bilder ifra andre nettleservinduer,\nslipp bildet rett på den store last-opp-knappen",
@@ -1479,6 +1497,8 @@ var Ls = {

 		"cut_mt": "使用多线程加速文件哈希$N$N这使用 Web Worker 并且需要更多内存（额外最多 512 MiB）$N$N这使得 https 快 30%，http 快 4.5 倍\">mt",

+		"cut_wasm": "使用基于 WASM 的哈希计算器代替浏览器内置的哈希功能；这可以提升在基于 Chrome 的浏览器上的速度，但会增加 CPU 使用率，而且许多旧版本的 Chrome 存在漏洞，启用此功能会导致浏览器占用所有内存并崩溃。\">wasm", //m
+
 		"cft_text": "网站图标文本（为空并刷新以禁用）",
 		"cft_fg": "前景色",
 		"cft_bg": "背景色",
@@ -1565,6 +1585,7 @@ var Ls = {
 		"f_empty": '该文件夹为空',
 		"f_chide": '隐藏列 «{0}»\n\n你可以在设置选项卡中重新显示列',
 		"f_bigtxt": "这个文件大小为 {0} MiB -- 真的以文本形式查看？",
+		"f_bigtxt2": " 你想查看文件的结尾部分吗？这也将启用实时跟踪功能，能够实时显示新添加的文本行。", //m
 		"fbd_more": '<div id="blazy">显示 <code>{0}</code> 个文件中的 <code>{1}</code> 个；<a href="#" id="bd_more">显示 {2}</a> 或 <a href="#" id="bd_all">显示全部</a></div>',
 		"fbd_all": '<div id="blazy">显示 <code>{0}</code> 个文件中的 <code>{1}</code> 个；<a href="#" id="bd_all">显示全部</a></div>',
 		"f_anota": "仅选择了 {0} 个项目，共 {1} 个；\n要选择整个文件夹，请先滚动到底部", //m
@@ -1669,6 +1690,11 @@ var Ls = {
 		"tvt_next": "显示下一个文档$N快捷键: K\">⬇ 下一个",
 		"tvt_sel": "选择文件&nbsp;（用于剪切/删除/...）$N快捷键: S\">选择",
 		"tvt_edit": "在文本编辑器中打开文件$N快捷键: E\">✏️ 编辑",
+		"tvt_tail": "监视文件更改，并实时显示新增的行\">📡 跟踪", //m
+		"tvt_wrap": "自动换行\">↵", //m
+		"tvt_atail": "锁定到底部，显示最新内容\">⚓", //m
+		"tvt_ctail": "解析终端颜色（ANSI 转义码）\">🌈", //m
+		"tvt_ntail": "滚动历史上限（保留多少字节的文本）", //m

 		"m3u_add1": "歌曲已添加到 m3u 播放列表", //m
 		"m3u_addn": "已添加 {0} 首歌曲到 m3u 播放列表", //m
@@ -1768,6 +1794,7 @@ var Ls = {
 		"u_https3": "以获得更好的性能",
 		"u_ancient": '你的浏览器非常古老 -- 也许你应该 <a href="#" onclick="goto(\'bup\')">改用 bup</a>',
 		"u_nowork": "需要 Firefox 53+ 或 Chrome 57+ 或 iOS 11+",
+		"tail_2old": "需要 Firefox 105+ 或 Chrome 71+ 或 iOS 14.5+",
 		"u_nodrop": '浏览器版本低，不支持通过拖动文件到窗口来上传文件',
 		"u_notdir": "不是文件夹！\n\n您的浏览器太旧；\n请尝试将文件夹拖入窗口",
 		"u_uri": "要从其他浏览器窗口拖放图片，\n请将其拖放到大的上传按钮上",
@@ -2090,6 +2117,7 @@ ebi('op_cfg').innerHTML = (
 	'		<a id="u2ts" class="tgl btn" href="#" tt="' + L.ut_u2ts + '</a>\n' +
 	'		<a id="umod" class="tgl btn" href="#" tt="' + L.cut_umod + '</a>\n' +
 	'		<a id="hashw" class="tgl btn" href="#" tt="' + L.cut_mt + '</a>\n' +
+	'		<a id="nosubtle" class="tgl btn" href="#" tt="' + L.cut_wasm + '</a>\n' +
 	'		<a id="u2turbo" class="tgl btn ttb" href="#" tt="' + L.cut_turbo + '</a>\n' +
 	'		<a id="u2tdate" class="tgl btn ttb" href="#" tt="' + L.cut_datechk + '</a>\n' +
 	'		<input type="text" id="u2szg" value="" ' + NOAC + ' style="width:3em" tt="' + L.cut_u2sz + '" />' +
@@ -2230,14 +2258,17 @@ SPINNER = m[0];


 var SBW, SBH;  // scrollbar size
-(function () {
+function read_sbw() {
 	var el = mknod('div');
-	el.style.cssText = 'overflow:scroll;width:100px;height:100px';
+	el.style.cssText = 'overflow:scroll;width:100px;height:100px;position:absolute;top:0;left:0';
 	document.body.appendChild(el);
 	SBW = el.offsetWidth - el.clientWidth;
 	SBH = el.offsetHeight - el.clientHeight;
 	document.body.removeChild(el);
-})();
+	setcvar('--sbw', SBW + 'px');
+	setcvar('--sbh', SBH + 'px');
+}
+onresize100.add(read_sbw, true);


 var have_webp = sread('have_webp');
@@ -2959,6 +2990,9 @@ var widget = (function () {
 			ebi('bplay').innerHTML = paused ? '▶' : '⏸';
 		}
 	};
+	r.setvis = function () {
+		widget.style.display = !has(perms, "read") || showfile.abrt ? 'none' : '';
+	};
 	wtico.onclick = function (e) {
 		if (!touchmode)
 			r.toggle(e);
@@ -5792,7 +5826,9 @@ var fileman = (function () {


 var showfile = (function () {
-	var r = {};
+	var r = {
+		'nrend': 0,
+	};
 	r.map = {
 		'.ahk': 'autohotkey',
 		'.bas': 'basic',
@@ -5905,16 +5941,77 @@ var showfile = (function () {
 		}
 		r.mktree();
 		if (em) {
-			render(em);
+			if (r.taildoc)
+				r.show(em[0], true);
+			else
+				render(em);
 			em = null;
 		}
 	};

+	r.tail = function (url, no_push) {
+		r.abrt = new AbortController();
+		widget.setvis();
+		render([url, '', ''], no_push);
+		var me = r.tail_id = Date.now(),
+			wfp = ebi('wfp'),
+			edoc = ebi('doc'),
+			txt = '';
+
+		url = addq(url, 'tail=-' + r.tailnb);
+		fetch(url, {'signal': r.abrt.signal}).then(function(rsp) {
+			var ro = rsp.body.pipeThrough(
+				new TextDecoderStream('utf-8', {'fatal': false}),
+				{'signal': r.abrt.signal}).getReader();
+
+			var rf = function() {
+				ro.read().then(function(v) {
+					if (r.tail_id != me)
+						return;
+					var vt = v.done ? '\n*** lost connection to copyparty ***' : v.value;
+					if (vt == '\x00')
+						return rf();
+					txt += vt;
+					var ofs = txt.length - r.tailnb;
+					if (ofs > 0) {
+						var ofs2 = txt.indexOf('\n', ofs);
+						if (ofs2 >= ofs && ofs - ofs2 < 512)
+							ofs = ofs2;
+						txt = txt.slice(ofs);
+					}
+					var html = esc(txt);
+					if (r.tailansi)
+						html = r.ansify(html);
+					edoc.innerHTML = html;
+					if (r.tail2end)
+						window.scrollTo(0, wfp.offsetTop - window.innerHeight);
+					if (!v.done)
+						rf();
+				});
+			};
+			if (r.tail_id == me)
+				rf();
+		});
+	};
+
+	r.untail = function () {
+		if (!r.abrt)
+			return;
+		r.abrt.abort();
+		r.abrt = null;
+		r.tail_id = -1;
+		widget.setvis();
+	};
+
 	r.show = function (url, no_push) {
+		r.untail();
 		var xhr = new XHR(),
 			m = /[?&](k=[^&#]+)/.exec(url);

 		url = url.split('?')[0] + (m ? '?' + m[1] : '');
+		if (r.taildoc)
+			return r.tail(url, no_push);
+
 		xhr.url = url;
 		xhr.fname = uricom_dec(url.split('/').pop());
 		xhr.no_push = no_push;
@@ -5954,7 +6051,8 @@ var showfile = (function () {

 	function render(doc, no_push) {
 		r.q = null;
-		var url = doc[0],
+		r.nrend++;
+		var url = r.url = doc[0],
 			lnh = doc[1],
 			txt = doc[2],
 			name = url.split('?')[0].split('/').pop(),
@@ -5968,9 +6066,13 @@ var showfile = (function () {
 		ebi('editdoc').style.display = (has(perms, 'write') && (is_md || has(perms, 'delete'))) ? '' : 'none';

 		var wr = ebi('bdoc'),
+			nrend = r.nrend,
 			defer = !Prism.highlightElement;

 		var fun = function (el) {
+			if (r.nrend != nrend)
+				return;
+
 			try {
 				if (lnh.slice(0, 5) == '#doc.')
 					sethash(lnh.slice(1));
@@ -5978,13 +6080,16 @@ var showfile = (function () {
 				el = el || QS('#doc>code');
 				Prism.highlightElement(el);
 				if (el.className == 'language-ans' || (!lang && /\x1b\[[0-9;]{0,16}m/.exec(txt.slice(0, 4096))))
-					r.ansify(el);
+					el.innerHTML = r.ansify(el.innerHTML);
 			}
 			catch (ex) { }
 		}

-		if (txt.length > 1024 * 256)
+		var skip_prism = !txt || txt.length > 1024 * 256;
+		if (skip_prism) {
 			fun = function (el) { };
+			is_md = false;
+		}

 		qsr('#doc');
 		var el = mknod('pre', 'doc');
@@ -5996,7 +6101,7 @@ var showfile = (function () {
 		else {
 			el.textContent = txt;
 			el.innerHTML = '<code>' + el.innerHTML + '</code>';
-			if (!window.no_prism) {
+			if (!window.no_prism && !skip_prism) {
 				if ((lang == 'conf' || lang == 'cfg') && ('\n' + txt).indexOf('\n# -*- mode: yaml -*-') + 1)
 					lang = 'yaml';

@@ -6006,6 +6111,8 @@ var showfile = (function () {
 				else
 					import_js(SR + '/.cpr/deps/prism.js', function () { fun(); });
 			}
+			if (!txt && r.wrap)
+				el.className = 'wrap';
 		}

 		wr.appendChild(el);
@@ -6027,11 +6134,11 @@ var showfile = (function () {
 		tree_scrollto();
 	}

-	r.ansify = function (el) {
+	r.ansify = function (html) {
 		var ctab = (light ?
 			'bfbfbf d30253 497600 b96900 006fbb a50097 288276 2d2d2d 9f9f9f 943b55 3a5600 7f4f00 00507d 683794 004343 000000' :
 			'404040 f03669 b8e346 ffa402 02a2ff f65be3 3da698 d2d2d2 606060 c75b79 c8e37e ffbe4a 71cbff b67fe3 9cf0ed ffffff').split(/ /g),
-			src = el.innerHTML.split(/\x1b\[/g),
+			src = html.split(/\x1b\[/g),
 			out = ['<span>'], fg = 7, bg = null, bfg = 0, bbg = 0, inv = 0, bold = 0;

 		for (var a = 0; a < src.length; a++) {
@@ -6084,7 +6191,7 @@ var showfile = (function () {

 			out.push(s + '">' + txt);
 		}
-		el.innerHTML = out.join('');
+		return out.join('');
 	};

 	r.mktree = function () {
@@ -6131,6 +6238,18 @@ var showfile = (function () {
 		msel.selui();
 	};

+	r.tgltail = function () {
+		if (!window.TextDecoderStream) {
+			bcfg_set('taildoc', r.taildoc = false);
+			return toast.err(10, L.tail_2old);
+		}
+		r.show(r.url, true);
+	};
+
+	r.tglwrap = function () {
+		r.show(r.url, true);
+	};
+
 	var bdoc = ebi('bdoc');
 	bdoc.className = 'line-numbers';
 	bdoc.innerHTML = (
@@ -6141,15 +6260,38 @@ var showfile = (function () {
 		'<a href="#" class="btn" id="nextdoc" tt="' + L.tvt_next + '</a>\n' +
 		'<a href="#" class="btn" id="seldoc" tt="' + L.tvt_sel + '</a>\n' +
 		'<a href="#" class="btn" id="editdoc" tt="' + L.tvt_edit + '</a>\n' +
+		'<a href="#" class="btn tgl" id="taildoc" tt="' + L.tvt_tail + '</a>\n' +
+		'<div id="tailbtns">\n' +
+		'<a href="#" class="btn tgl" id="wrapdoc" tt="' + L.tvt_wrap + '</a>\n' +
+		'<a href="#" class="btn tgl" id="tail2end" tt="' + L.tvt_atail + '</a>\n' +
+		'<a href="#" class="btn tgl" id="tailansi" tt="' + L.tvt_ctail + '</a>\n' +
+		'<input type="text" id="tailnb" value="" ' + NOAC + ' style="width:4em" tt="' + L.tvt_ntail + '" />' +
+		'</div>\n' +
 		'</div>'
 	);
 	ebi('xdoc').onclick = function () {
+		r.untail();
 		thegrid.setvis(true);
+		bcfg_bind(r, 'taildoc', 'taildoc', false, r.tgltail);
 	};
 	ebi('dldoc').setAttribute('download', '');
 	ebi('prevdoc').onclick = function () { tree_neigh(-1); };
 	ebi('nextdoc').onclick = function () { tree_neigh(1); };
 	ebi('seldoc').onclick = r.tglsel;
+	bcfg_bind(r, 'wrap', 'wrapdoc', true, r.tglwrap);
+	bcfg_bind(r, 'taildoc', 'taildoc', false, r.tgltail);
+	bcfg_bind(r, 'tail2end', 'tail2end', true);
+	bcfg_bind(r, 'tailansi', 'tailansi', false, r.tgltail);
+
+	r.tailnb = ebi('tailnb').value = icfg_get('tailnb', 131072);
+	ebi('tailnb').oninput = function (e) {
+		swrite('tailnb', r.tailnb = this.value);
+	};
+
+	if (/[?&]tail\b/.exec(sloc0)) {
+		clmod(ebi('taildoc'), 'on', 1);
+		r.taildoc = true;
+	}

 	return r;
 })();
@@ -6444,6 +6586,7 @@ var thegrid = (function () {
 				ohref = esc(ao.getAttribute('href')),
 				href = ohref.split('?')[0],
 				ext = '',
+				ext0 = '',
 				name = uricom_dec(vsplit(href)[1]),
 				ref = ao.getAttribute('id'),
 				isdir = href.endsWith('/'),
@@ -6456,17 +6599,19 @@ var thegrid = (function () {
 					ar.shift();

 				ar.reverse();
+				ext0 = ar[0];
 				for (var b = 0; b < Math.min(2, ar.length); b++) {
 					if (ar[b].length > 7)
 						break;

-					ext = ar[b] + '.' + ext;
+					ext = ext ? (ar[b] + '.' + ext) : ar[b];
 				}
-				ext = (ext || 'unk.').slice(0, -1);
+				if (!ext)
+					ext = 'unk';
 			}

-			if (use_ext_th && ext_th[ext]) {
-				ihref = ext_th[ext];
+			if (use_ext_th && (ext_th[ext] || ext_th[ext0])) {
+				ihref = ext_th[ext] || ext_th[ext0];
 			}
 			else if (r.thumbs) {
 				ihref = addq(ihref, 'th=' + (have_webp ? 'w' : 'j'));
@@ -7497,7 +7642,7 @@ var treectl = (function () {
 	bcfg_bind(r, 'idxh', 'idxh', idxh, setidxh);
 	bcfg_bind(r, 'dyn', 'dyntree', true, onresize);
 	bcfg_bind(r, 'csel', 'csel', dgsel);
-	bcfg_bind(r, 'dots', 'dotfiles', false, function (v) {
+	bcfg_bind(r, 'dots', 'dotfiles', see_dots, function (v) {
 		r.goto();
 		var xhr = new XHR();
 		xhr.open('GET', SR + '/?setck=dots=' + (v ? 'y' : ''), true);
@@ -8573,7 +8718,7 @@ function apply_perms(res) {
 	if (up2k)
 		up2k.set_fsearch();

-	ebi('widget').style.display = have_read ? '' : 'none';
+	widget.setvis();
 	thegrid.setvis();
 	if (!have_read && have_write)
 		goto('up2k');
@@ -10104,13 +10249,18 @@ ebi('files').onclick = ebi('docul').onclick = function (e) {
 			fun = function () {
 				showfile.show(href, tgt.getAttribute('lang'));
 			},
+			tfun = function () {
+				bcfg_set('taildoc', showfile.taildoc = true);
+				fun();
+			},
 			szs = ft2dict(a.closest('tr'))[0].sz,
 			sz = parseInt(szs.replace(/[, ]/g, ''));

-		if (sz < 1024 * 1024)
+		if (sz < 1024 * 1024 || showfile.taildoc)
 			fun();
 		else
-			modal.confirm(L.f_bigtxt.format(f2f(sz / 1024 / 1024, 1)), fun, null);
+			modal.confirm(L.f_bigtxt.format(f2f(sz / 1024 / 1024, 1)), fun, function() {
+				modal.confirm(L.f_bigtxt2, tfun, null)});

 		return ev(e);
 	}
--- a/copyparty/web/idp.html
+++ b/copyparty/web/idp.html
@@ -0,0 +1,55 @@
+<!DOCTYPE html>
+<html lang="en">
+
+<head>
+	<meta charset="utf-8">
+	<title>{{ s_doctitle }}</title>
+	<meta http-equiv="X-UA-Compatible" content="IE=edge">
+	<meta name="viewport" content="width=device-width, initial-scale=0.8">
+    <meta name="robots" content="noindex, nofollow">
+	<meta name="theme-color" content="#{{ tcolor }}">
+	<link rel="stylesheet" media="screen" href="{{ r }}/.cpr/shares.css?_={{ ts }}">
+	<link rel="stylesheet" media="screen" href="{{ r }}/.cpr/ui.css?_={{ ts }}">
+{{ html_head }}
+</head>
+
+<body>
+	<div id="wrap">
+		<a href="{{ r }}/?idp">refresh</a>
+		<a href="{{ r }}/?h">control-panel</a>
+
+        <table id="tab"><thead><tr>
+            <th>forget</th>
+            <th>user</th>
+            <th>groups</th>
+        </tr></thead><tbody>
+        {% for un, gn in rows %}
+        <tr>
+            <td><a href="{{ r }}/?idp=rm={{ un|e }}">forget</a></td>
+            <td>{{ un|e }}</td>
+            <td>{{ gn|e }}</td>
+        </tr>
+        {% endfor %}
+        </tbody></table>
+        {% if not rows %}
+        (there are no IdP users in the cache)
+        {% endif %}
+    </div>
+	<a href="#" id="repl">π</a>
+	<script>
+
+var SR="{{ r }}",
+	lang="{{ lang }}",
+	dfavico="{{ favico }}";
+
+var STG = window.localStorage;
+document.documentElement.className = (STG && STG.cpp_thm) || "{{ this.args.theme }}";
+
+</script>
+<script src="{{ r }}/.cpr/util.js?_={{ ts }}"></script>
+{%- if js %}
+<script src="{{ js }}_={{ ts }}"></script>
+{%- endif %}
+</body>
+</html>
+
--- a/copyparty/web/splash.html
+++ b/copyparty/web/splash.html
@@ -135,6 +135,10 @@

 		<h1 id="cc">other stuff:</h1>
 		<ul>
+			{%- if this.uname in this.args.idp_adm_set %}
+			<li><a id="ag" href="{{ r }}/?idp">view idp cache</a></li>
+			{% endif %}
+
 			{%- if this.uname != '*' and this.args.shr %}
 			<li><a id="y" href="{{ r }}/?shares">edit shares</a></li>
 			{% endif %}
--- a/copyparty/web/splash.js
+++ b/copyparty/web/splash.js
@@ -39,6 +39,7 @@ var Ls = {
 		"ad1": "no304 stopper all bruk av cache. Hvis ikke k304 var nok, prøv denne. Vil mangedoble dataforbruk!",
 		"ae1": "utgående:",
 		"af1": "vis nylig opplastede filer",
+		"ag1": "vis kjente IdP-brukere",
 	},
 	"eng": {
 		"d2": "shows the state of all active threads",
@@ -90,6 +91,7 @@ var Ls = {
 		"ad1": "启用 no304 将禁用所有缓存；如果 k304 不够，可以尝试此选项。这将消耗大量的网络流量！", //m
 		"ae1": "正在下载：", //m
 		"af1": "显示最近上传的文件", //m
+		"ag1": "查看已知 IdP 用户", //m
 	}
 };

--- a/copyparty/web/up2k.js
+++ b/copyparty/web/up2k.js
@@ -1,6 +1,18 @@
 "use strict";


+(function () {
+    var x = sread('nosubtle');
+    if (x === '0' || x === '1')
+        nosubtle = parseInt(x);
+    if ((nosubtle > 1 && !CHROME && !FIREFOX) ||
+        (nosubtle > 2 && !CHROME) ||
+        (CHROME && nosubtle > VCHROME) ||
+        !WebAssembly)
+        nosubtle = 0;
+})();
+
+
 function goto_up2k() {
    if (up2k === false)
        return goto('bup');
@@ -23,7 +35,7 @@ var up2k = null,
    m = 'will use ' + sha_js + ' instead of native sha512 due to';

 try {
-    if (sread('nosubtle') || window.nosubtle)
+    if (nosubtle)
        throw 'chickenbit';
    var cf = crypto.subtle || crypto.webkitSubtle;
    cf.digest('SHA-512', new Uint8Array(1)).then(
@@ -825,7 +837,7 @@ function up2k_init(subtle) {
            }
            qsr('#u2depmsg');
            var o = mknod('div', 'u2depmsg');
-            o.innerHTML = m;
+            o.innerHTML = nosubtle ? '' : m;
            ebi('u2foot').appendChild(o);
        }
        loading_deps = true;
@@ -881,7 +893,8 @@ function up2k_init(subtle) {
    bcfg_bind(uc, 'turbo', 'u2turbo', turbolvl > 1, draw_turbo);
    bcfg_bind(uc, 'datechk', 'u2tdate', turbolvl < 3, null);
    bcfg_bind(uc, 'az', 'u2sort', u2sort.indexOf('n') + 1, set_u2sort);
-    bcfg_bind(uc, 'hashw', 'hashw', !!WebAssembly && !(CHROME && MOBILE) && (!subtle || !CHROME), set_hashw);
+    bcfg_bind(uc, 'hashw', 'hashw', !!WebAssembly && !(CHROME && MOBILE) && (!subtle || !CHROME || VCHROME > 136), set_hashw);
+    bcfg_bind(uc, 'hwasm', 'nosubtle', nosubtle, set_nosubtle);
    bcfg_bind(uc, 'upnag', 'upnag', false, set_upnag);
    bcfg_bind(uc, 'upsfx', 'upsfx', false, set_upsfx);

@@ -1442,9 +1455,16 @@ function up2k_init(subtle) {
            if (CHROME) {
                // chrome-bug 383568268 // #124
                nw = Math.max(1, (nw > 4 ? 4 : (nw - 1)));
+                if (VCHROME < 137)
                nw = (subtle && !MOBILE && nw > 2) ? 2 : nw;
            }

+            var x = sread('u2hashers') || window.u2hashers;
+            if (x) {
+                console.log('u2hashers is overriding default-value ' + nw);
+                nw = parseInt(x);
+            }
+
            for (var a = 0; a < nw; a++)
                hws.push(new Worker(SR + '/.cpr/w.hash.js?_=' + TS));

@@ -2213,6 +2233,7 @@ function up2k_init(subtle) {
            reading = 0,
            max_readers = 1,
            opt_readers = 2,
+            failed = false,
            free = [],
            busy = {},
            nbusy = 0,
@@ -2262,6 +2283,14 @@ function up2k_init(subtle) {
                tasker();
        }

+        function go_fail() {
+            failed = true;
+            if (nbusy)
+                return;
+            apop(st.busy.hash, t);
+            st.bytes.finished += t.size;
+        }
+
        function onmsg(d) {
            d = d.data;
            var k = d[0];
@@ -2276,6 +2305,12 @@ function up2k_init(subtle) {
                return vis_exh(d[1], 'up2k.js', '', '', d[1]);

            if (k == "fail") {
+                var nchunk = d[1];
+                free.push(busy[nchunk]);
+                delete busy[nchunk];
+                nbusy--;
+                reading--;
+
                pvis.seth(t.n, 1, d[1]);
                pvis.seth(t.n, 2, d[2]);
                console.log(d[1], d[2]);
@@ -2283,9 +2318,7 @@ function up2k_init(subtle) {
                    got_oserr();

                pvis.move(t.n, 'ng');
-                apop(st.busy.hash, t);
-                st.bytes.finished += t.size;
-                return;
+                return go_fail();
            }

            if (k == "ferr")
@@ -2318,6 +2351,9 @@ function up2k_init(subtle) {
                t.hash.push(nchunk);
                pvis.hashed(t);

+                if (failed)
+                    return go_fail();
+
                if (t.hash.length < nchunks)
                    return nbusy < opt_readers && go_next();

@@ -2395,8 +2431,8 @@ function up2k_init(subtle) {
            try { orz(e); } catch (ex) { vis_exh(ex + '', 'up2k.js', '', '', ex); }
        };

-        xhr.timeout = 34000;
        xhr.open('HEAD', t.purl + uricom_enc(t.name), true);
+        xhr.timeout = 34000;
        xhr.send();
    }

@@ -2875,7 +2911,8 @@ function up2k_init(subtle) {

                st.bytes.inflight += db;
                xhr.bsent = nb;
-                xhr.timeout = 64000 + Date.now() - xhr.t0;
+                if (!IE)
+                    xhr.timeout = 64000 + Date.now() - xhr.t0;
                pvis.prog(t, pcar, nb);
            };
            xhr.onload = function (xev) {
@@ -2923,7 +2960,7 @@ function up2k_init(subtle) {

            xhr.bsent = 0;
            xhr.t0 = Date.now();
-            xhr.timeout = 42000;
+            xhr.timeout = 1000 * (IE ? 1234 : 42);
            xhr.responseType = 'text';
            xhr.send(t.fobj.slice(car, cdr));
        }
@@ -3269,6 +3306,12 @@ function up2k_init(subtle) {
        }
    }

+    function set_nosubtle(v) {
+        if (!WebAssembly)
+            return toast.err(10, L.u_nowork);
+        modal.confirm(L.lang_set, location.reload.bind(location), null);
+    }
+
    function set_upnag(en) {
        function nopenag() {
            bcfg_set('upnag', uc.upnag = false);
--- a/copyparty/web/util.js
+++ b/copyparty/web/util.js
@@ -32,7 +32,7 @@ var wah = '',
    CHROME = !!window.chrome,  // safari=false
    VCHROME = CHROME ? 1 : 0,
    UA = '' + navigator.userAgent,
-    IE = /Trident\//.test(UA),
+    IE = !!document.documentMode,
    FIREFOX = ('netscape' in window) && / rv:/.test(UA),
    IPHONE = TOUCH && /iPhone|iPad|iPod/i.test(UA),
    LINUX = /Linux/.test(UA),
@@ -69,7 +69,7 @@ try {

    CHROME = navigator.userAgentData.brands.find(function (d) { return d.brand == 'Chromium' });
    if (CHROME)
-        VCHROME = CHROME.version;
+        VCHROME = parseInt(CHROME.version);
    else
        VCHROME = 0;

@@ -183,7 +183,7 @@ function vis_exh(msg, url, lineNo, columnNo, error) {
    if (url.indexOf(' > eval') + 1 && !evalex_fatal)
        return;  // md timer

-    if (IE && url.indexOf('prism.js') + 1)
+    if (url.indexOf('prism.js') + 1)
        return;

    if (url.indexOf('easymde.js') + 1)
--- a/copyparty/web/w.hash.js
+++ b/copyparty/web/w.hash.js
@@ -4,6 +4,16 @@
 function hex2u8(txt) {
    return new Uint8Array(txt.match(/.{2}/g).map(function (b) { return parseInt(b, 16); }));
 }
+function esc(txt) {
+    return txt.replace(/[&"<>]/g, function (c) {
+        return {
+            '&': '&amp;',
+            '"': '&quot;',
+            '<': '&lt;',
+            '>': '&gt;'
+        }[c];
+    });
+}


 var subtle = null;
@@ -19,6 +29,8 @@ catch (ex) {
 }
 function load_fb() {
    subtle = null;
+    if (self.hashwasm)
+        return;
    importScripts('deps/sha512.hw.js');
    console.log('using fallback hasher');
 }
--- a/docs/changelog.md
+++ b/docs/changelog.md
@@ -1,3 +1,102 @@
+▀▀▀▀▀▀▀▀▀▀▀▀▀▀▀▀▀▀▀▀▀▀▀▀▀▀▀▀▀▀▀▀▀▀▀▀▀▀▀▀▀▀▀▀▀▀▀▀▀▀▀▀▀▀  
+# 2025-0622-0020  `v1.18.0`  Logtail
+
+## 🧪 new features
+
+* textfile-viewer can now livestream logfiles (and other growing files) 17fa4906 77df17d1 a1c7a095 6ecf4fdc
+  * see [readme](https://github.com/9001/copyparty/#textfile-viewer) and the [live demo](https://a.ocv.me/pub/demo/logtail/)
+* IdP-volumes: extend syntax for excluding certain users/groups 2e53f797
+  * the commit-message explains it well enough
+* new option `--see-dots` to show dotfiles in the web-ui by default c599e2aa
+* #171 automatic mimetype detection for files without extensions (thx @Morganamilo!) ec05f8cc 9dd5dec0
+  * default-disabled since it has a performance impact on webdav
+    * there are plans to fix this by using the db instead
+* #170 improve custom filetype icons
+  * be less strict; if a thumbnail is set for `.gz` files, use it for `.tar.gz` too c75b0c25
+  * improve config docs fa5845ff
+
+## 🩹 bugfixes
+
+* cosmetic: get rid of some noise along the bottom of some cards in the gridview 8cae7a71
+* cosmetic: satisfy a new syntax warning in cpython-3.14 5ac38648
+
+## 🔧 other changes
+
+* properly document how to [build from source](https://github.com/9001/copyparty/blob/hovudstraum/docs/devnotes.md#build-from-scratch) / build from scratch f61511d8
+* update deps
+  * copyparty.exe: python 3.13 1eff87c3
+  * webdeps: dompurify 7eca90cc
+
+## 🌠 fun facts
+
+* this release was cooked up in a [swedish forest cabin](https://a.ocv.me/pub/g/nerd-stuff/forestparty.jpg)
+
+
+
+▀▀▀▀▀▀▀▀▀▀▀▀▀▀▀▀▀▀▀▀▀▀▀▀▀▀▀▀▀▀▀▀▀▀▀▀▀▀▀▀▀▀▀▀▀▀▀▀▀▀▀▀▀▀  
+# 2025-0527-1939  `v1.17.2`  pushing chrome to the limits (and then some)
+
+## 🧪 new features
+
+* not this time
+
+## 🩹 bugfixes
+
+* up2k: improve file-hashing speed on recent versions of google chrome e3e51fb8
+  * speed increased from 319 to 513 MiB/s by default (but older chrome versions did 748...)
+  * read the commit message for the full story, but basically chrome has gotten gradually slower over the past couple versions (starting from v133) and this makes it slightly less bad again
+  * hashing speed can be further improved from `0.5` to `1.1` GiB/s by enabling the `[wasm]` option in the `[⚙️] settings` tab
+    * this option can be made default-enabled with `--nosubtle 137` but beware that this increases the chances of running into browser-bugs (foreshadowing...)
+* up2k: fix errorhandler for browser-bugs (oom and such) 49c71247
+  * because [chrome-bug 383568268](https://issues.chromium.org/issues/383568268) is about to make a [surprise return?!](https://issues.chromium.org/issues/383568268#comment14)
+* #168 fix uploading into shares if path-based proxying is used 9cb93ae1
+* #165 unconditionally heed `--rp-loc` 84f5f417
+  * the config-option for [path-based proxying](https://github.com/9001/copyparty/#reverse-proxy) was ignored if the reverse-proxy was untrusted; this was confusing and not strictly necessary
+
+## 🔧 other changes
+
+* #166 the nixos module was improved once more (thx @msfjarvis!) 48470f6b 60fb1207
+* added usage instructions to [minimal-up2k.js](https://github.com/9001/copyparty/tree/hovudstraum/contrib/plugins#example-browser-js), the up2k-ui [simplifier](https://user-images.githubusercontent.com/241032/118311195-dd6ca380-b4ef-11eb-86f3-75a3ff2e1332.png) 1d308eeb
+* docker: improve feedback if config is bad or missing 28b63e58
+
+## 🌠 fun facts
+
+* this release was tested using an [unreliable rdp connection](https://a.ocv.me/pub/g/nerd-stuff/PXL_20250526_021207825.jpg) through two ssh-jumphosts to a qemu win10 vm back home from the bergen-oslo night train wifi
+
+
+
+▀▀▀▀▀▀▀▀▀▀▀▀▀▀▀▀▀▀▀▀▀▀▀▀▀▀▀▀▀▀▀▀▀▀▀▀▀▀▀▀▀▀▀▀▀▀▀▀▀▀▀▀▀▀  
+# 2025-0518-2234  `v1.17.1`  as seen on archlinux
+
+## 🧪 new features
+
+* new toolbar button to zip/tar the currently open folder 256dad8c
+* new options to specify the default checksum algorithm for PUT/bup/WebDAV uploads 0de09860
+* #164 new option `--put-name` to specify the filename of nameless uploads 5dcd88a6
+  * the default is still `put-TIMESTAMP-IPADDRESS.bin`
+
+## 🩹 bugfixes
+
+* #162 password-protected shares was incompatible with password-hashing c3ef3fdc
+* #161 m3u playlist creation was only possible over https 94352f27
+* when relocating/redirecting an upload from an xbu hook (execute-before-upload), could miss an already existing file at the destination and create another copy 0a9a8077
+* some edgecases when moving files between filesystems f425ff51
+* improve tagscan-resume after a server restart (primarily for dupes) 41fa6b25
+* support prehistoric timestamps in fat16 vhd-drives on windows 261236e3
+
+## 🔧 other changes
+
+* #159 the nixos module was improved (thx @gabevenberg and @chinponya!) d1bca1f5
+* an archlinux maintainer adopted the aur package; copyparty is now [officially in arch](https://archlinux.org/packages/extra/any/copyparty/) b9ba783c
+* #162 add KDE Dolphin instructions to the conect-page d4a8071d
+* audioplayer now knows that `.oga` means `.ogg`
+
+## 🌠 fun facts
+
+* this release contains code [pair-programmed during an anime rave](https://a.ocv.me/pub/g/nerd-stuff/PXL_20250503_222654610.jpg)
+
+
+
 ▀▀▀▀▀▀▀▀▀▀▀▀▀▀▀▀▀▀▀▀▀▀▀▀▀▀▀▀▀▀▀▀▀▀▀▀▀▀▀▀▀▀▀▀▀▀▀▀▀▀▀▀▀▀  
 # 2025-0426-2149  `v1.17.0`  mixtape.m3u

--- a/docs/devnotes.md
+++ b/docs/devnotes.md
@@ -22,6 +22,7 @@
    * [dev env setup](#dev-env-setup)
    * [just the sfx](#just-the-sfx)
    * [build from release tarball](#build-from-release-tarball) - uses the included prebuilt webdeps
+    * [build from scratch](#build-from-scratch) - how the sausage is made
    * [complete release](#complete-release)
 * [debugging](#debugging)
    * [music playback halting on phones](#music-playback-halting-on-phones) - mostly fine on android
@@ -190,6 +191,9 @@ authenticate using header `Cookie: cppwd=foo` or url param `&pw=foo`
 | GET | `?v` | open image/video/audio in mediaplayer |
 | GET | `?txt` | get file at URL as plaintext |
 | GET | `?txt=iso-8859-1` | ...with specific charset |
+| GET | `?tail` | continuously stream a growing file |
+| GET | `?tail=1024` | ...starting from byte 1024 |
+| GET | `?tail=-128` | ...starting 128 bytes from the end |
 | GET | `?th` | get image/video at URL as thumbnail |
 | GET | `?th=opus` | convert audio file to 128kbps opus |
 | GET | `?th=caf` | ...in the iOS-proprietary container |
@@ -257,6 +261,7 @@ upload modifiers:
 |--|--|--|
 | GET | `?reload=cfg` | reload config files and rescan volumes |
 | GET | `?scan` | initiate a rescan of the volume which provides URL |
+| GET | `?scan=/a,/b` | initiate a rescan of volumes `/a` and `/b` |
 | GET | `?stack` | show a stacktrace of all threads |

 ## general
@@ -338,7 +343,7 @@ for the `re`pack to work, first run one of the sfx'es once to unpack it

 you need python 3.9 or newer due to type hints

-the rest is mostly optional; if you need a working env for vscode or similar
+setting up a venv with the below packages is only necessary if you want it for vscode or similar

 ```sh
 python3 -m venv .venv
@@ -350,7 +355,7 @@ 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 Pillow pyheif-pillow-opener  # thumbnails
 pip install pyvips  # faster thumbnails
 pip install psutil  # better cleanup of stuck metadata parsers on windows 
 pip install black==21.12b0 click==8.0.2 bandit pylint flake8 isort mypy  # vscode tooling
@@ -392,6 +397,39 @@ python3 setup.py install --skip-build --prefix=/usr --root=$HOME/pe/copyparty
 ```


+## build from scratch
+
+how the sausage is made:
+
+to get started, first `cd` into the `scripts` folder
+
+* the first step is the webdeps; they end up in `../copyparty/web/deps/` for example `../copyparty/web/deps/marked.js.gz` -- if you need to build the webdeps, run `make -C deps-docker`
+  * this needs rootless podman and the `podman-docker` compat-layer to pretend it's docker, although it *should* be possible to use rootful/rootless docker too
+  * if you don't have rootless podman/docker then `sudo make -C deps-docker` is fine too
+  * alternatively, you can entirely skip building the webdeps and instead extract the compiled webdeps from the latest github release with `./make-sfx.sh fast dl-wd`
+
+* next, build `copyparty-sfx.py` by running `./make-sfx.sh gz fast`
+  * this is a dependency for most of the remaining steps, since they take the sfx as input
+  * removing `fast` makes it compress better
+  * removing `gz` too compresses even better, but startup gets slower
+
+* if you want to build the `.pyz` standalone "binary", now run `./make-pyz.sh`
+
+* if you want to build a pypi package, now run `./make-pypi-release.sh d`
+
+* if you want to build a docker-image, you have two options:
+  * if you want to use podman to build all docker-images for all supported architectures, now run `(cd docker; ./make.sh hclean; ./make.sh hclean pull img)`
+  * if you want to use docker to build all docker-images for your native architecture, now run `sudo make -C docker`
+  * if you want to do something else, please take a look at `docker/make.sh` or `docker/Makefile` for inspiration
+
+* if you want to build the windows exe, first grab some snacks and a beer, [you'll need it](https://github.com/9001/copyparty/tree/hovudstraum/scripts/pyinstaller)
+
+the complete list of buildtime dependencies to do a build from scratch is as follows:
+
+* on ubuntu-server, install podman or [docker](https://get.docker.com/), and then `sudo apt install make zip bzip2`
+  * because ubuntu is specifically what someone asked about :-p
+
+
 ## complete release

 also builds the sfx so skip the sfx section above
--- a/docs/examples/docker/idp/copyparty.conf
+++ b/docs/examples/docker/idp/copyparty.conf
@@ -106,3 +106,10 @@
  /w/tank1
 [/m8s]
  /w/tank2
+
+
+# some other things you can do:
+#  [/demo/${u%-su,%-fds}]   # users which are NOT members of "su" or "fds"
+#  [/demo/${u%+su,%+fds}]   # users which ARE members of BOTH "su" and "fds"
+#  [/demo/${g%-su}]         # all groups except su
+#  [/demo/${g%-su,%-fds}]   # all groups except su and fds
--- a/docs/versus.md
+++ b/docs/versus.md
@@ -168,6 +168,7 @@ symbol legend,
 | upload a 999 TiB file   | █ |   |   |   | █ | █ | • |   | █ |   | █ | ╱ | ╱ |
 | CTRL-V from device      | █ |   |   | █ |   |   |   |   |   |   |   |   |   |
 | race the beam ("p2p")   | █ |   |   |   |   |   |   |   |   |   |   |   |   |
+| "tail -f" streaming     | █ |   |   |   |   |   |   |   |   |   |   |   |   |
 | keep last-modified time | █ |   |   | █ | █ | █ |   |   |   |   |   | █ |   |
 | upload rules            | ╱ | ╱ | ╱ | ╱ | ╱ |   |   | ╱ | ╱ |   | ╱ | ╱ | ╱ |
 | ┗ max disk usage        | █ | █ | █ |   | █ |   |   |   | █ |   |   | █ | █ |
@@ -193,6 +194,8 @@ symbol legend,

 * `race the beam` = files can be downloaded while they're still uploading; downloaders are slowed down such that the uploader is always ahead

+* `tail -f` = when viewing or downloading a logfile, the connection can remain open to keep showing new lines as they are added in real time
+
 * `upload routing` = depending on filetype / contents / uploader etc., the file can be redirected to another location or otherwise transformed; mitigates limitations such as [sharex#3992](https://github.com/ShareX/ShareX/issues/3992)
  * copyparty example: [reloc-by-ext](https://github.com/9001/copyparty/tree/hovudstraum/bin/hooks#before-upload)

--- a/flake.lock
+++ b/flake.lock
@@ -17,16 +17,16 @@
    },
    "nixpkgs": {
      "locked": {
-        "lastModified": 1680334310,
-        "narHash": "sha256-ISWz16oGxBhF7wqAxefMPwFag6SlsA9up8muV79V9ck=",
+        "lastModified": 1748162331,
+        "narHash": "sha256-rqc2RKYTxP3tbjA+PB3VMRQNnjesrT0pEofXQTrMsS8=",
        "owner": "NixOS",
        "repo": "nixpkgs",
-        "rev": "884e3b68be02ff9d61a042bc9bd9dd2a358f95da",
+        "rev": "7c43f080a7f28b2774f3b3f43234ca11661bf334",
        "type": "github"
      },
      "original": {
        "id": "nixpkgs",
-        "ref": "nixos-22.11",
+        "ref": "nixos-25.05",
        "type": "indirect"
      }
    },
--- a/flake.nix
+++ b/flake.nix
@@ -1,6 +1,6 @@
 {
  inputs = {
-    nixpkgs.url = "nixpkgs/nixos-22.11";
+    nixpkgs.url = "nixpkgs/nixos-25.05";
    flake-utils.url = "github:numtide/flake-utils";
  };

@@ -17,6 +17,9 @@
      let
        pkgs = import nixpkgs {
          inherit system;
+          config = {
+            allowAliases = false;
+          };
          overlays = [ self.overlays.default ];
        };
      in {
--- a/scripts/deps-docker/Dockerfile
+++ b/scripts/deps-docker/Dockerfile
@@ -3,7 +3,7 @@ WORKDIR /z
 ENV     ver_asmcrypto=c72492f4a66e17a0e5dd8ad7874de354f3ccdaa5 \
        ver_hashwasm=4.12.0 \
        ver_marked=4.3.0 \
-        ver_dompf=3.2.5 \
+        ver_dompf=3.2.6 \
        ver_mde=2.18.0 \
        ver_codemirror=5.65.18 \
        ver_fontawesome=5.13.0 \
--- a/scripts/docker/Dockerfile.dj
+++ b/scripts/docker/Dockerfile.dj
@@ -15,13 +15,14 @@ RUN     apk add -U !pyc \
            py3-jinja2 py3-argon2-cffi py3-pyzmq py3-pillow \
            py3-pip py3-cffi \
            ffmpeg \
+            py3-magic \
            vips-jxl vips-heif vips-poppler vips-magick \
            py3-numpy fftw libsndfile \
            vamp-sdk vamp-sdk-libs \
        && apk add -t .bd \
            bash wget gcc g++ make cmake patchelf \
            python3-dev ffmpeg-dev fftw-dev libsndfile-dev \
-            py3-wheel py3-numpy-dev \
+            py3-wheel py3-numpy-dev libffi-dev \
            vamp-sdk-dev \
        && rm -f /usr/lib/python3*/EXTERNALLY-MANAGED \
        && python3 -m pip install pyvips \
--- a/scripts/docker/Dockerfile.djd
+++ b/scripts/docker/Dockerfile.djd
@@ -1,4 +1,7 @@
-FROM    debian:12-slim
+FROM    DO_NOT_USE_THIS_DOCKER_IMAGE
+# this image is an unmaintained experiment to see whether alpine was the correct choice (it was)
+
+#FROM    debian:12-slim
 WORKDIR /z
 LABEL   org.opencontainers.image.url="https://github.com/9001/copyparty" \
        org.opencontainers.image.source="https://github.com/9001/copyparty/tree/hovudstraum/scripts/docker" \
--- a/scripts/docker/Dockerfile.djf
+++ b/scripts/docker/Dockerfile.djf
@@ -1,4 +1,7 @@
-FROM    fedora:39
+FROM    DO_NOT_USE_THIS_DOCKER_IMAGE
+# this image is an unmaintained experiment to see whether alpine was the correct choice (it was)
+
+#FROM    fedora:39
 WORKDIR /z
 LABEL   org.opencontainers.image.url="https://github.com/9001/copyparty" \
        org.opencontainers.image.source="https://github.com/9001/copyparty/tree/hovudstraum/scripts/docker" \
--- a/scripts/docker/Dockerfile.djff
+++ b/scripts/docker/Dockerfile.djff
@@ -1,4 +1,7 @@
-FROM    fedora:38
+FROM    DO_NOT_USE_THIS_DOCKER_IMAGE
+# this image is an unmaintained experiment to see whether alpine was the correct choice (it was)
+
+#FROM    fedora:38
 WORKDIR /z
 LABEL   org.opencontainers.image.url="https://github.com/9001/copyparty" \
        org.opencontainers.image.source="https://github.com/9001/copyparty/tree/hovudstraum/scripts/docker" \
--- a/scripts/docker/Dockerfile.dju
+++ b/scripts/docker/Dockerfile.dju
@@ -1,4 +1,7 @@
-FROM    ubuntu:23.04
+FROM    DO_NOT_USE_THIS_DOCKER_IMAGE
+# this image is an unmaintained experiment to see whether alpine was the correct choice (it was)
+
+#FROM    ubuntu:23.04
 WORKDIR /z
 LABEL   org.opencontainers.image.url="https://github.com/9001/copyparty" \
        org.opencontainers.image.source="https://github.com/9001/copyparty/tree/hovudstraum/scripts/docker" \
--- a/scripts/docker/Dockerfile.iv
+++ b/scripts/docker/Dockerfile.iv
@@ -12,10 +12,11 @@ RUN     apk add -U !pyc \
            py3-jinja2 py3-argon2-cffi py3-pyzmq py3-pillow \
            py3-pip py3-cffi \
            ffmpeg \
+            py3-magic \
            vips-jxl vips-heif vips-poppler vips-magick \
        && apk add -t .bd \
            bash wget gcc g++ make cmake patchelf \
-            python3-dev py3-wheel \
+            python3-dev py3-wheel libffi-dev \
        && rm -f /usr/lib/python3*/EXTERNALLY-MANAGED \
        && python3 -m pip install pyvips \
        && apk del py3-pip .bd
--- a/scripts/docker/Makefile
+++ b/scripts/docker/Makefile
@@ -28,6 +28,14 @@ all:

 	docker image ls

+min:
+	rm -rf i
+	mkdir i
+	tar -cC../.. dist/copyparty-sfx.py bin/mtag | tar -xvCi
+
+	podman build --squash --pull=always -t copyparty/min:latest -f Dockerfile.min .
+	echo 'scale=1;'`podman save copyparty/min:latest | pigz -c | wc -c`/1024/1024 | bc
+
 push:
 	docker push copyparty/min
 	docker push copyparty/im
--- a/scripts/docker/innvikler.sh
+++ b/scripts/docker/innvikler.sh
@@ -63,12 +63,13 @@ python3 -m copyparty \
  --ign-ebind -p$((1024+RANDOM)),$((1024+RANDOM)),$((1024+RANDOM)) \
  -v .::r --no-crt -qi127.1 --wr-h-eps $t & pid=$!

-for n in $(seq 1 200); do sleep 0.2
+for n in $(seq 1 900); do sleep 0.2
  v=$(awk '/^127/{print;n=1;exit}END{exit n-1}' $t) && break
 done
 [ -z "$v" ] && echo SNAAAAAKE && exit 1
+rm $t

-for n in $(seq 1 200); do sleep 0.2
+for n in $(seq 1 900); do sleep 0.2
  wget -O- http://${v/ /:}/?tar=gz:1 >tf && break
 done
 tar -xzO top/innvikler.sh <tf | cmp innvikler.sh
@@ -79,7 +80,7 @@ kill $pid; wait $pid
 ########################################################################

 # output from -e2d
-rm -rf .hist
+rm -rf .hist /cfg/copyparty

 # goodbye
 exec rm innvikler.sh
--- a/scripts/make-sfx.sh
+++ b/scripts/make-sfx.sh
@@ -537,6 +537,7 @@ find | grep -E '\.(js|html)$' | while IFS= read -r f; do
 done

 gzres() {
+	local pk=
 	[ $zopf ] && command -v zopfli && pk="zopfli --i$zopf"
 	[ $zopf ] && command -v pigz && pk="pigz -11 -I $zopf"
 	[ -z "$pk" ] && pk='gzip'
@@ -628,7 +629,6 @@ suf=
 [ $use_gz ] && {
 	sed -r 's/"r:bz2"/"r:gz"/' <$py >$py.t
 	py=$py.t
-	suf=-gz
 }

 "$pybin" $py --sfx-make tar.bz2 $ver $ts
--- a/scripts/pyinstaller/build.sh
+++ b/scripts/pyinstaller/build.sh
@@ -14,9 +14,10 @@ clean=--clean

 uname -s | grep WOW64 && m=64 || m=32
 uname -s | grep NT-10 && w10=1 || w7=1
+[ $w7 ] && export PRTY_NO_MAGIC=1
 [ $w7 ] && [ -e up2k.sh ] && [ ! "$1" ] && ./up2k.sh

-[ $w7 ] && pyv=37 || pyv=312
+[ $w7 ] && pyv=37 || pyv=313
 esuf=
 [ $w7 ] && [ $m = 32 ] && esuf=32
 [ $w7 ] && [ $m = 64 ] && esuf=-winpe64
@@ -89,14 +90,18 @@ excl=(
    urllib.request
    urllib.response
    urllib.robotparser
-    zipfile
 )
 [ $w10 ] && excl+=(
+    _pyrepl
+    distutils
+    setuptools
+    PIL._avif
    PIL.ImageQt
    PIL.ImageShow
    PIL.ImageTk
    PIL.ImageWin
    PIL.PdfParser
+    zipimport
 ) || excl+=(
    inspect
    PIL
@@ -104,6 +109,7 @@ excl=(
    PIL.Image
    PIL.ImageDraw
    PIL.ImageOps
+    zipfile
 )
 excl=( "${excl[@]/#/--exclude-module }" )

--- a/scripts/pyinstaller/deps.sha512
+++ b/scripts/pyinstaller/deps.sha512
@@ -3,7 +3,7 @@ f117016b1e6a7d7e745db30d3e67f1acf7957c443a0dd301b6c5e10b8368f2aa4db6be9782d2d3f8
 17ce52ba50692a9d964f57a23ac163fb74c77fdeb2ca988a6d439ae1fe91955ff43730c073af97a7b3223093ffea3479a996b9b50ee7fba0869247a56f74baa6  pefile-2023.2.7-py3-none-any.whl
 b297ff66ec50cf5a1abcf07d6ac949644c5150ba094ffac974c5d27c81574c3e97ed814a47547f4b03a4c83ea0fb8f026433fca06a3f08e32742dc5c024f3d07  pywin32_ctypes-0.2.3-py3-none-any.whl
 085d39ef4426aa5f097fbc484595becc16e61ca23fc7da4d2a8bba540a3b82e789e390b176c7151bdc67d01735cce22b1562cdb2e31273225a2d3e275851a4ad  setuptools-70.3.0-py3-none-any.whl
-360a141928f4a7ec18a994602cbb28bbf8b5cc7c077a06ac76b54b12fa769ed95ca0333a5cf728923a8e0baeb5cc4d5e73e5b3de2666beb05eb477d8ae719093  upx-4.2.4-win32.zip
+644931f8e1764e168c257c11c77b3d2ac5408397d97b0eef98168a058efe793d3ab6900dc2e9c54923a2bd906dd66bfbff8db6ff43418513e530a1bd501c6ccd  upx-5.0.1-win32.zip
 # win7
 3253e86471e6f9fa85bfdb7684cd2f964ed6e35c6a4db87f81cca157c049bef43e66dfcae1e037b2fb904567b1e028aaeefe8983ba3255105df787406d2aa71e  en_windows_7_professional_with_sp1_x86_dvd_u_677056.iso
 ab0db0283f61a5bbe44797d74546786bf41685175764a448d2e3bd629f292f1e7d829757b26be346b5044d78c9c1891736d93237cee4b1b6f5996a902c86d15f  en_windows_7_professional_with_sp1_x64_dvd_u_676939.iso
@@ -24,10 +24,11 @@ ac96786e5d35882e0c5b724794329c9125c2b86ae7847f17acfc49f0d294312c6afc1c3f248655de
 0a2cd4cadf0395f0374974cd2bc2407e5cc65c111275acdffb6ecc5a2026eee9e1bb3da528b35c7f0ff4b64563a74857d5c2149051e281cc09ebd0d1968be9aa  en-us_windows_10_enterprise_ltsc_2021_x64_dvd_d289cf96.iso
 16cc0c58b5df6c7040893089f3eb29c074aed61d76dae6cd628d8a89a05f6223ac5d7f3f709a12417c147594a87a94cc808d1e04a6f1e407cc41f7c9f47790d1  virtio-win-0.1.248.iso
 9a7f40edc6f9209a2acd23793f3cbd6213c94f36064048cb8bf6eb04f1bdb2c2fe991cb09f77fe8b13e5cd85c618ef23573e79813b2fef899ab2f290cd129779  jinja2-3.1.6-py3-none-any.whl
-6df21f0da408a89f6504417c7cdf9aaafe4ed88cfa13e9b8fa8414f604c0401f885a04bbad0484dc51a29284af5d1548e33c6cc6bfb9896d9992c1b1074f332d  MarkupSafe-3.0.2-cp312-cp312-win_amd64.whl
+00731cfdd9d5c12efef04a7161c90c1e5ed1dc4677aa88a1d4054aff836f3430df4da5262ed4289c21637358a9e10e5df16f76743cbf5a29bb3a44b146c19cf3  MarkupSafe-3.0.2-cp313-cp313-win_amd64.whl
 8a6e2b13a2ec4ef914a5d62aad3db6464d45e525a82e07f6051ed10474eae959069e165dba011aefb8207cdfd55391d73d6f06362c7eb247b08763106709526e  mutagen-1.47.0-py3-none-any.whl
-0203ec2551c4836696cfab0b2c9fff603352f03fa36e7476e2e1ca7ec57a3a0c24bd791fcd92f342bf817f0887854d9f072e0271c643de4b313d8c9569ba8813  packaging-24.1-py3-none-any.whl
-c9051daaf34ec934962c743a5ac2dbe55a9b0cababb693a8cde0001d24d4a50b67bd534d714d935def6ca7b898ec0a352e58bd9ccdce01c54eaf2281b18e478d  pillow-11.2.1-cp312-cp312-win_amd64.whl
-f0463895e9aee97f31a2003323de235fed1b26289766dc0837261e3f4a594a31162b69e9adbb0e9a31e2e2d4b5f25c762ed1669553df7dc89a8ba4f85d297873  pyinstaller-6.11.1-py3-none-win_amd64.whl
-d550a0a14428386945533de2220c4c2e37c0c890fc51a600f626c6ca90a32d39572c121ec04c157ba3a8d6601cb021f8433d871b5c562a3d342c804fffec90c1  pyinstaller_hooks_contrib-2024.11-py3-none-any.whl
-4f9a4d9f65c93e2d851e2674057343a9599f30f5dc582ffca485522237d4fcf43653b3d393ed5eb11e518c4ba93714a07134bbb13a97d421cce211e1da34682e  python-3.12.10-amd64.exe
+a726fb46cce24f781fc8b55a3e6dea0a884ebc3b2b400ea74aa02333699f4955a5dc1e2ec5927ac72f35a624401f3f3b442882ba1cc4cadaf9c88558b5b8bdae  packaging-25.0-py3-none-any.whl
+3e39ea6e16b502d99a2e6544579095d0f7c6097761cd85135d5e929b9dec1b32e80669a846f94ee8c2cca9be2f5fe728625d09453988864c04e16bb8445c3f91  pillow-11.3.0-cp313-cp313-win_amd64.whl
+59fbbcae044f4ee73d203ac74b553b27bfad3e6b2f3fb290fd3f8774753c6b545176b6b3399c240b092d131d152290ce732750accd962dc1e48e930be85f5e53  pyinstaller-6.14.1-py3-none-win_amd64.whl
+fc6f3e144c5f5b662412de07cb8bf0c2eb3b3be21d19ec448aef3c4244d779b9ab8027fd67a4871e6e13823b248ea0f5a7a9241a53aef30f3b51a6d3cb5bdb3f  pyinstaller_hooks_contrib-2025.5-py3-none-any.whl
+2c7a52e223b8186c21009d3fa5ed6a856d8eb4ef3b98f5d24c378c6a1afbfa1378bd7a51d6addc500e263d7989efb544c862bf920055e740f137c702dfd9d18b  python-3.13.5-amd64.exe
+2a0420f7faaa33d2132b82895a8282688030e939db0225ad8abb95a47bdb87b45318f10985fc3cee271a9121441c1526caa363d7f2e4a4b18b1a674068766e87  setuptools-80.9.0-py3-none-any.whl
--- a/scripts/pyinstaller/notes.txt
+++ b/scripts/pyinstaller/notes.txt
@@ -29,19 +29,19 @@ 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
-  pywin32_ctypes-0.2.2-py3-none-any.whl
-  setuptools-70.3.0-py3-none-any.whl
-  upx-4.2.4-win32.zip
+  pywin32_ctypes-0.2.3-py3-none-any.whl
+  upx-5.0.1-win32.zip
 )
 [ $w10 ] && fns+=(
  jinja2-3.1.6-py3-none-any.whl
-  MarkupSafe-2.1.5-cp312-cp312-win_amd64.whl
+  MarkupSafe-3.0.2-cp313-cp313-win_amd64.whl
  mutagen-1.47.0-py3-none-any.whl
-  packaging-24.1-py3-none-any.whl
-  pillow-11.2.1-cp312-cp312-win_amd64.whl
-  pyinstaller-6.10.0-py3-none-win_amd64.whl
-  pyinstaller_hooks_contrib-2024.8-py3-none-any.whl
-  python-3.12.10-amd64.exe
+  packaging-25.0-py3-none-any.whl
+  pillow-11.3.0-cp313-cp313-win_amd64.whl
+  pyinstaller-6.14.1-py3-none-win_amd64.whl
+  pyinstaller_hooks_contrib-2025.5-py3-none-any.whl
+  python-3.13.5-amd64.exe
+  setuptools-80.9.0-py3-none-any.whl
 )
 [ $w7 ] && fns+=(
  future-1.0.0-py3-none-any.whl
@@ -49,6 +49,7 @@ fns=(
  packaging-24.0-py3-none-any.whl
  pip-24.0-py3-none-any.whl
  pyinstaller_hooks_contrib-2023.8-py2.py3-none-any.whl
+  setuptools-70.3.0-py3-none-any.whl
  typing_extensions-4.7.1-py3-none-any.whl
  zipp-3.15.0-py3-none-any.whl
 )
@@ -80,7 +81,7 @@ close and reopen git-bash so python is in PATH

 ===[ copy-paste into git-bash ]================================
 uname -s | grep NT-10 && w10=1 || w7=1
-[ $w7 ] && pyv=37 || pyv=312
+[ $w7 ] && pyv=37 || pyv=313
 appd=$(cygpath.exe "$APPDATA")
 cd ~/Downloads &&
 yes | unzip upx-*-win32.zip &&
--- a/scripts/rls.sh
+++ b/scripts/rls.sh
@@ -34,6 +34,7 @@ shift
 ./make-sfx.sh "$@"
 f=../dist/copyparty-sfx
 [ -e $f.py ] && s= || s=-gz
+# TODO: the -gz suffix is gone, can drop all the $s stuff probably

 $f$s.py --version >/dev/null

--- a/scripts/sfx.ls
+++ b/scripts/sfx.ls
@@ -94,6 +94,7 @@ copyparty/web/deps/prismd.css,
 copyparty/web/deps/scp.woff2,
 copyparty/web/deps/sha512.ac.js,
 copyparty/web/deps/sha512.hw.js,
+copyparty/web/idp.html,
 copyparty/web/iiam.gif,
 copyparty/web/md.css,
 copyparty/web/md.html,
--- a/scripts/tl.js
+++ b/scripts/tl.js
@@ -335,6 +335,8 @@ var tl_browser = {

 		"cut_mt": "use multithreading to accelerate file hashing$N$Nthis uses web-workers and requires$Nmore RAM (up to 512 MiB extra)$N$Nmakes https 30% faster, http 4.5x faster\">mt",

+		"cut_wasm": "use wasm instead of the browser's built-in hasher; improves speed on chrome-based browsers but increases CPU load, and many older versions of chrome have bugs which makes the browser consume all RAM and crash if this is enabled\">wasm",
+
 		"cft_text": "favicon text (blank and refresh to disable)",
 		"cft_fg": "foreground color",
 		"cft_bg": "background color",
@@ -421,6 +423,7 @@ var tl_browser = {
 		"f_empty": 'this folder is empty',
 		"f_chide": 'this will hide the column «{0}»\n\nyou can unhide columns in the settings tab',
 		"f_bigtxt": "this file is {0} MiB large -- really view as text?",
+		"f_bigtxt2": "view just the end of the file instead? this will also enable following/tailing, showing newly added lines of text in real time",
 		"fbd_more": '<div id="blazy">showing <code>{0}</code> of <code>{1}</code> files; <a href="#" id="bd_more">show {2}</a> or <a href="#" id="bd_all">show all</a></div>',
 		"fbd_all": '<div id="blazy">showing <code>{0}</code> of <code>{1}</code> files; <a href="#" id="bd_all">show all</a></div>',
 		"f_anota": "only {0} of the {1} items were selected;\nto select the full folder, first scroll to the bottom",
@@ -525,6 +528,11 @@ var tl_browser = {
 		"tvt_next": "show next document$NHotkey: K\">⬇ next",
 		"tvt_sel": "select file &nbsp; ( for cut / copy / delete / ... )$NHotkey: S\">sel",
 		"tvt_edit": "open file in text editor$NHotkey: E\">✏️ edit",
+		"tvt_tail": "monitor file for changes; show new lines in real time\">📡 follow",
+		"tvt_wrap": "word-wrap\">↵",
+		"tvt_atail": "lock scroll to bottom of page\">⚓",
+		"tvt_ctail": "decode terminal colors (ansi escape codes)\">🌈",
+		"tvt_ntail": "scrollback limit (how many bytes of text to keep loaded)",

 		"m3u_add1": "song added to m3u playlist",
 		"m3u_addn": "{0} songs added to m3u playlist",
@@ -624,6 +632,7 @@ var tl_browser = {
 		"u_https3": "for better performance",
 		"u_ancient": 'your browser is impressively ancient -- maybe you should <a href="#" onclick="goto(\'bup\')">use bup instead</a>',
 		"u_nowork": "need firefox 53+ or chrome 57+ or iOS 11+",
+		"tail_2old": "need firefox 105+ or chrome 71+ or iOS 14.5+",
 		"u_nodrop": 'your browser is too old for drag-and-drop uploading',
 		"u_notdir": "that's not a folder!\n\nyour browser is too old,\nplease try dragdrop instead",
 		"u_uri": "to dragdrop images from other browser windows,\nplease drop it onto the big upload button",
--- a/tests/res/idp/7.conf
+++ b/tests/res/idp/7.conf
@@ -0,0 +1,46 @@
+# -*- mode: yaml -*-
+# vim: ft=yaml:
+
+[global]
+  idp-h-usr: x-idp-user
+  idp-h-grp: x-idp-group
+
+[/u/${u}]
+  /u/${u}
+  accs:
+    r: *
+
+[/uya/${u%+ga}]
+  /uya/${u}
+  accs:
+    r: *
+
+[/uyab/${u%+ga,%+gb}]
+  /uyab/${u}
+  accs:
+    r: *
+
+[/una/${u%-ga}]
+  /una/${u}
+  accs:
+    r: *
+
+[/unab/${u%-ga,%-gb}]
+  /unab/${u}
+  accs:
+    r: *
+
+[/gya/${g%+ga}]
+  /gya/${g}
+  accs:
+    r: *
+
+[/gna/${g%-ga}]
+  /gna/${g}
+  accs:
+    r: *
+
+[/gnab/${g%-ga,%-gb}]
+  /gnab/${g}
+  accs:
+    r: *
--- a/tests/res/idp/8.conf
+++ b/tests/res/idp/8.conf
@@ -0,0 +1,47 @@
+# -*- mode: yaml -*-
+# vim: ft=yaml:
+
+[groups]
+  ga: iua, iuab, iuabc
+  gb: iuab, iuabc, iub, iubc
+  gc: iuabc, iubc, iuc
+
+[/u/${u}]
+  /u/${u}
+  accs:
+    r: *
+
+[/uya/${u%+ga}]
+  /uya/${u}
+  accs:
+    r: *
+
+[/uyab/${u%+ga,%+gb}]
+  /uyab/${u}
+  accs:
+    r: *
+
+[/una/${u%-ga}]
+  /una/${u}
+  accs:
+    r: *
+
+[/unab/${u%-ga,%-gb}]
+  /unab/${u}
+  accs:
+    r: *
+
+[/gya/${g%+ga}]
+  /gya/${g}
+  accs:
+    r: *
+
+[/gna/${g%-ga}]
+  /gna/${g}
+  accs:
+    r: *
+
+[/gnab/${g%-ga,%-gb}]
+  /gnab/${g}
+  accs:
+    r: *
--- a/tests/test_idp.py
+++ b/tests/test_idp.py
@@ -234,3 +234,74 @@ class TestVFS(unittest.TestCase):
        au.idp_checkin(None, "iud", "su")
        self.assertAxsAt(au, "team/su/iuc", [["iuc", "iud"]])
        self.assertAxsAt(au, "team/su/iud", [["iuc", "iud"]])
+
+    def test_7(self):
+        """
+        conditional idp-vols
+        """
+        _, cfgdir, xcfg = self.prep()
+        au = AuthSrv(Cfg(c=[cfgdir + "/7.conf"], **xcfg), self.log)
+        au.idp_checkin(None, "iua", "ga")
+        au.idp_checkin(None, "iuab", "ga,gb")
+        au.idp_checkin(None, "iuabc", "ga,gb,gc")
+        au.idp_checkin(None, "iub", "gb")
+        au.idp_checkin(None, "iubc", "gb,gc")
+        au.idp_checkin(None, "iuc", "gc")
+        zs = """
+u/iua
+u/iuab
+u/iuabc
+u/iub
+u/iubc
+u/iuc
+uya/iua
+uya/iuab
+uya/iuabc
+uyab/iuab
+uyab/iuabc
+una/iub
+una/iubc
+una/iuc
+unab/iuc
+gya/ga
+gna/gb
+gna/gc
+gnab/gc
+"""
+        zl1 = sorted(zs.strip().split("\n"))[:]
+        zl2 = sorted(list(au.vfs.all_vols))[:]
+        # print(" ".join(zl1))
+        # print(" ".join(zl2))
+        self.assertListEqual(zl1, zl2)
+
+    def test_8(self):
+        """
+        conditional non-idp vols
+        """
+        _, cfgdir, xcfg = self.prep()
+        xcfg = {"vc": True}
+        au = AuthSrv(Cfg(c=[cfgdir + "/8.conf"], **xcfg), self.log)
+        zs = """
+u/iua
+u/iuab
+u/iuabc
+u/iub
+u/iubc
+u/iuc
+uya/iua
+uya/iuab
+uya/iuabc
+uyab/iuab
+uyab/iuabc
+una/iub
+una/iubc
+una/iuc
+unab/iuc
+gya/ga
+gna/gb
+gna/gc
+gnab/gc
+"""
+        zl1 = sorted(zs.strip().split("\n"))[:]
+        zl2 = sorted(list(au.vfs.all_vols))[:]
+        self.assertListEqual(zl1, zl2)
--- a/tests/util.py
+++ b/tests/util.py
@@ -143,22 +143,22 @@ class Cfg(Namespace):
    def __init__(self, a=None, v=None, c=None, **ka0):
        ka = {}

-        ex = "chpw daw dav_auth dav_mac dav_rt e2d e2ds e2dsa e2t e2ts e2tsr e2v e2vu e2vp early_ban ed emp exp force_js getmod grid gsel hardlink ih ihead magic hardlink_only nid nih no_acode no_athumb no_bauth no_clone no_cp no_dav no_db_ip no_del no_dirsz no_dupe no_lifetime no_logues no_mv no_pipe no_poll no_readme no_robots no_sb_md no_sb_lg no_scandir no_tarcmp no_thumb no_vthumb no_zip nrand nsort nw og og_no_head og_s_title ohead q rand re_dirsz rss smb srch_dbg srch_excl stats uqe vague_403 vc ver wo_up_readme write_uplog xdev xlink xvol zipmaxu zs"
+        ex = "chpw daw dav_auth dav_mac dav_rt e2d e2ds e2dsa e2t e2ts e2tsr e2v e2vu e2vp early_ban ed emp exp force_js getmod grid gsel hardlink hardlink_only ih ihead magic nid nih no_acode no_athumb no_bauth no_clone no_cp no_dav no_db_ip no_del no_dirsz no_dupe no_lifetime no_logues no_mv no_pipe no_poll no_readme no_robots no_sb_md no_sb_lg no_scandir no_tail no_tarcmp no_thumb no_vthumb no_zip nrand nsort nw og og_no_head og_s_title ohead q rand re_dirsz rmagic rss smb srch_dbg srch_excl stats uqe vague_403 vc ver wo_up_readme write_uplog xdev xlink xvol zipmaxu zs"
        ka.update(**{k: False for k in ex.split()})

-        ex = "dav_inf dedup dotpart dotsrch hook_v no_dhash no_fastboot no_fpool no_htp no_rescan no_sendfile no_ses no_snap no_up_list no_voldump re_dhash plain_ip"
+        ex = "dav_inf dedup dotpart dotsrch hook_v no_dhash no_fastboot no_fpool no_htp no_rescan no_sendfile no_ses no_snap no_up_list no_voldump re_dhash see_dots plain_ip"
        ka.update(**{k: True for k in ex.split()})

        ex = "ah_cli ah_gen css_browser dbpath hist ipu js_browser js_other mime mimes no_forget no_hash no_idx nonsus_urls og_tpl og_ua ua_nodoc ua_nozip"
        ka.update(**{k: None for k in ex.split()})

-        ex = "hash_mt hsortn safe_dedup srch_time u2abort u2j u2sz"
+        ex = "hash_mt hsortn safe_dedup srch_time tail_fd tail_rate u2abort u2j u2sz"
        ka.update(**{k: 1 for k in ex.split()})

-        ex = "au_vol dl_list mtab_age reg_cap s_thead s_tbody th_convt ups_who zip_who"
+        ex = "au_vol dl_list mtab_age reg_cap s_thead s_tbody tail_tmax tail_who th_convt ups_who zip_who"
        ka.update(**{k: 9 for k in ex.split()})

-        ex = "db_act forget_ip k304 loris no304 re_maxage rproxy rsp_jtr rsp_slp s_wr_slp snap_wri theme themes turbo u2ow zipmaxn zipmaxs"
+        ex = "db_act forget_ip idp_store k304 loris no304 nosubtle re_maxage rproxy rsp_jtr rsp_slp s_wr_slp snap_wri theme themes turbo u2ow zipmaxn zipmaxs"
        ka.update(**{k: 0 for k in ex.split()})

        ex = "ah_alg bname chpw_db doctitle df exit favico idp_h_usr ipa html_head lg_sba lg_sbf log_fk md_sba md_sbf name og_desc og_site og_th og_title og_title_a og_title_v og_title_i shr tcolor textfiles unlist vname xff_src zipmaxt R RS SR"
Author	SHA1	Message	Date
ed	a95ea03cd0	v1.18.1	2025-07-07 13:20:59 +00:00
ed	f6be390579	avoid pillow warning	2025-07-07 12:58:03 +00:00
ed	4f264a0a9c	add idp-cache editor ui	2025-07-07 12:52:31 +00:00
ed	d27144340f	ie11 fix	2025-07-07 11:09:46 +00:00
ed	299cff3ff7	copyparty.exe: update pillow	2025-07-07 11:05:49 +00:00
ed	42c199e78e	api for rescanning multiple volumes; `?scan=/foo,/bar` will perform a filesystem reindexing of volumes `/foo` and `/bar` even if they only have `e2d` and not `e2ds`	2025-07-07 09:53:03 +00:00
ed	1b2d39857b	reset x-forwarded-for before next req; assume the following stack: cpp <- rproxyA <- rproxyB <- WAN if A also accepts WAN requests, and A muxes both B and WAN onto a single connection to cpp, then WAN requests may get tagged with the IP-address of the most recent B request aside from the confusing logs, this could break unpost on servers with shared accounts	2025-07-07 08:47:24 +00:00
ed	ed908b9868	usb-eject: support non-alphanumeric volume names until now, volumes with whitespace and such would fail to unmount also adds a sanchk that the directory to unmount is still below the expected parent after absreal; the path was already passed to gio in a safe manner (assuming gio doesn't have any vulns) but why risk it	2025-07-07 08:35:41 +00:00
ed	d162502c38	add idp-volume persistence (optional); it keeps track of all seen users/groups by default, but nothing takes effect unless --idp-store=3 or 2	2025-07-07 01:05:57 +02:00
ed	bf11b2a421	drop corrupted sockets; socket.accept() can fail silently -- this would crash the worker-pool and also produce a confusing useless error-message while doing so reported by someone on a mac with Little Snitch: uv python install cpython-3.13.3-macos-aarch64-none uv python pin cpython-3.13.3-macos-aarch64-none uv sync uv run copyparty ...but was also observed on x86_64 linux with python 2.7 in 2018 (no longer reproduces) fix this to log what's going on and also don't crash	2025-07-01 18:32:27 +00:00
morganamilo	77274e9d59	Add python-magic to iv and dj docker files	2025-06-29 11:14:02 +00:00
ed	8306e3d9de	docker: disarm unmaintained images	2025-06-29 11:13:29 +00:00
ed	deb6711b51	docker: add missing cleanup	2025-06-29 11:12:29 +00:00
ed	7ef6fd13cf	navpane: fix scrollbar overlap	2025-06-28 21:10:48 +00:00
ed	65c4e03574	fix keyfinder build; stopped working in alpine 3.22 due to switching to llvm, which strictly requres CXXFLAGS rather than CFLAGS the PKG_CONFIG_PATH change is unnecessary but might as well	2025-06-22 12:27:11 +00:00
ed	c9fafb202d	copyparty32.exe: fix segfault on win7	2025-06-22 01:17:48 +00:00
ed	d4d9069130	update pkgs to 1.18.0	2025-06-22 00:59:42 +00:00
ed	7eca90cc21	v1.18.0	2025-06-22 00:20:31 +00:00
ed	6ecf4fdceb	textfile-streaming fixes; * add optional max duration, default-infinite * add optional wordwrap, default-enabled * url-param `...&tail` enables tailing in textviewer too * hide bottom tray while tailing	2025-06-21 23:36:19 +00:00
ed	8cae7a715b	fix linecrop bleed (#170 ): chrome (only on windows and macos) could show the top row of pixels of the truncated line; this seems to fix it	2025-06-20 16:55:47 +02:00
ed	c75b0c25a6	ext-th: reduce specificity (#170 ); thumbnails defined for file-extension '.asdf' will now also apply to '.qwer.asdf' if no more specific ext-th is given	2025-06-20 16:25:30 +02:00
ed	9dd5dec093	adjustments after #171 ; * move the new functionality to --rmagic * performance tweaks	2025-06-19 17:25:31 +00:00
morganamilo	ec05f8ccd5	Detect content-type when extension is missing or unknown If a file has no known extension the content type gets set to application/octet-stream causing the browser try and download the file when viewed directly. This quickly becomes annoying as many of the files I interact with often have no extension. I.e., config files, log files, LICENSE files and other random text files. This patch uses libmagic to detect the file type and set the content-type header. It also does this for the RSS feed and webdav for sake of completeness. This patch does not touch the front end at all so these files still have a 'txt' button and a type of '%' in the web UI. But when clicked on, the browser will display the files correctly. This feature is enabled with the existing "magic" option. I thought this fit as the existing functionality also uses libmagic and gives file extensions to files on upload. Tell me if it should be its own option instead. The code base was very confusing, this patch works but I have no idea if it's the way you'd like this implemented. Hopefully its acceptable as is.	2025-06-19 17:18:23 +00:00
ed	a1c7a095ee	textfile-streaming fixes; * give up on disconnect * block scrapers from tailing * prism throws on window-resize if riced object has poofed * fix prism-init race	2025-06-19 17:07:06 +00:00
ed	77df17d191	add ui for streaming textfiles in realtime	2025-06-16 00:00:40 +00:00
ed	fa5845ff5f	readme: explain ext-th better; closes #170	2025-06-14 22:38:04 +00:00
ed	17fa490687	add ?tail	2025-06-14 21:13:14 +00:00
ed	1eff87c3bd	copyparty.exe: upgrade to python 3.13	2025-06-13 21:53:16 +00:00
ed	d123d2bff0	add test for non-idp group filtering	2025-06-13 19:34:58 +00:00
ed	5ac3864874	avoid new SyntaxWarning in python 3.14 this change should not alter behavior; the code was already correct prevents the following message on stdout during startup: SyntaxWarning: 'return' in a 'finally' block	2025-06-08 18:32:45 +02:00
ed	c599e2aaa3	add opt for dotfile visibility default	2025-06-08 18:32:32 +02:00
ed	2e53f7979a	IdP: multiple group rules for ${u} and ${g} until now, ${u} would match all users, ${u%-foo} would exclude users in group foo, ${u%+foo} would only include users in group foo now, the following is also possible: ${u%-foo,%-bar} excludes users in group foo and/or group bar, ${u%+foo,%+bar} only includes users which are in groups foo AND bar, ${g%-foo} skips group foo (includes all others), ${g%-foo,%-bar} skips group foo and/or bar (includes all others) see ./docs/examples/docker/idp/copyparty.conf ; https://github.com/9001/copyparty/blob/hovudstraum/docs/examples/docker/idp/copyparty.conf	2025-06-03 20:03:17 +00:00
ed	f61511d8c8	docs: building from source / building from scratch	2025-05-29 21:54:54 +00:00
ed	47415a7120	update pkgs to 1.17.2	2025-05-27 20:11:24 +00:00
ed	db7becacd2	v1.17.2	2025-05-27 19:39:22 +00:00
ed	28b63e587b	docker: improve lack-of-config panic	2025-05-27 18:52:41 +00:00
ed	9cb93ae1ed	fix upload into share with vproxy; closes #168	2025-05-27 16:29:03 +00:00
ed	e3e51fb83a	mitigate google-chrome slow hashing file hashing became drastically slower in recent chrome versions; * 748 MiB/s in 131.0.6778.86 * 747 MiB/s in 132.0.6834.160 * 485 MiB/s in 133.0.6943.60 * 319 MiB/s in 134.0.6998.36 the silver lining: it looks like chrome-bug 1352210 is improving (crypto.subtle, the native hasher, now scales with multiple cores) * 133.0.6943.60: speed peaked at 2 threads; 341 MiB/s, 485 MiB/s * 134.0.6998.36: peak at 7; 193, 383, 383, 408, 421, 431, 438, 438 * 137.0.7151.41: peak at 8; 210, 382, 445, 513, 573, 573, 585, 598 MiB/s when hashing with 1, 2, ..., 7, 8 webworkers respectively on a ryzen7-5800x with 2x16g 2133mhz ram characteristics of versions between v134 and v137 are unknown (cannot find old official builds to test), but v137 is a good cutoff for minimizing risk of hitting chrome-bugs meanwhile, hash-wasm scales linearly up to 8 cores; 0=328 1=377 2=738 3=947 4=1090 5=1190 6=1380 7=1530 8=1810 (0 = wasm on mainthread, no webworkers) but it looks like chrome-bug 383568268 is making a return, so keep the limit of max 4 threads if machine has more than 4 cores (and numCores-1 otherwise)	2025-05-27 15:33:50 +00:00
ed	49c7124776	fix errorhandling for browser-oom because chrome-bug 383568268 is possibly making a return soon (observed in google-chrome 138.0.7191.0 and chromium 139.0.7205.0)	2025-05-27 15:25:09 +00:00
Harsh Shandilya	60fb1207fc	fix: disable use of aliases in nixpkgs This enables compatibility with users who also disable aliases The utillinux alias was added in 2020[1], which is older than the previous Nixpkgs pin, which means we can safely switch to the non-aliased version. 1: `3896a0c0e2/pkgs/top-level/aliases.nix (L1967)`	2025-05-27 10:17:15 +00:00
Harsh Shandilya	48470f6b50	fix: update to the latest NixOS release Flake lock file updates: • Updated input 'nixpkgs': 'github:NixOS/nixpkgs/884e3b68be02ff9d61a042bc9bd9dd2a358f95da' (2023-04-01) → 'github:NixOS/nixpkgs/7c43f080a7f28b2774f3b3f43234ca11661bf334' (2025-05-25)	2025-05-27 10:17:15 +00:00
ed	1d308eeb4c	minimal-up2k: add usage instructions	2025-05-21 20:53:19 +00:00
ed	84f5f41747	unconditionally apply `--rp-loc` (#165 ) previously, `--rp-loc` only took effect for trusted reverse-proxies this was a source of confusion when setting up a config from scratch, since there is no obvious relation to `--xff-src` as this behavior was incidental, `--rp-loc` is now always applied, even if the proxy is untrusted (or not detected at all)	2025-05-19 22:01:29 +00:00
ed	19189afb34	docker: fix i386 builds	2025-05-18 23:49:41 +00:00
ed	23e77a3389	update pkgs to 1.17.1	2025-05-18 22:52:49 +00:00