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haproxy: add X-Forwarded-Proto to example (codeberg#6)
2026-08-14 22:33:06 -06:00 · 2026-08-06 22:10:18 +00:00 · 2026-08-06 21:08:34 +00:00 · 2026-08-05 01:52:58 +02:00 · 2026-08-03 22:36:36 +00:00 · 2026-08-03 22:32:26 +00:00
102 changed files with 874 additions and 237 deletions
--- a/.gitattributes
+++ b/.gitattributes
@ -4,4 +4,5 @@

 *.png binary
 *.gif binary
+*.ico binary
 *.gz binary
--- a/README.md
+++ b/README.md
@ -76,6 +76,7 @@ built in Norway 🇳🇴 with contributions from [not-norway](https://github.com
        * [connecting to webdav from windows](#connecting-to-webdav-from-windows) - using the GUI
    * [tftp server](#tftp-server) - a TFTP server (read/write) can be started using `--tftp 3969`
    * [smb server](#smb-server) - unsafe, slow, not recommended for wan
+    * [wopi server](#wopi-server) - edit office documents in the web-ui
    * [browser ux](#browser-ux) - tweaking the ui
    * [opengraph](#opengraph) - discord and social-media embeds
    * [file deduplication](#file-deduplication) - enable symlink-based upload deduplication
@ -136,6 +137,7 @@ built in Norway 🇳🇴 with contributions from [not-norway](https://github.com
    * [client-side](#client-side) - when uploading files
 * [security](#security) - there is a [discord server](https://discord.gg/25J8CdTT6G) with announcements
    * [gotchas](#gotchas) - behavior that might be unexpected
+    * [csp nonce](#csp-nonce) - unauthorized javascript is blocked
    * [cors](#cors) - cross-site request config
    * [filekeys](#filekeys) - prevent filename bruteforcing
        * [dirkeys](#dirkeys) - share specific folders in a volume
@ -773,7 +775,7 @@ press `g` or `田` to toggle grid-view instead of the file listing  and `t` togg
 ![copyparty-thumbs-fs8](https://user-images.githubusercontent.com/241032/129636211-abd20fa2-a953-4366-9423-1c88ebb96ba9.png)

 it does static images with Pillow / pyvips / FFmpeg, and uses FFmpeg for video files, so you may want to `--no-thumb` or maybe just `--no-vthumb` depending on how dangerous your users are
-* pyvips is 3x faster than Pillow, Pillow is 3x faster than FFmpeg
+* Pillow is 3x faster (and safer) than FFmpeg
 * disable thumbnails for specific volumes with volflag `dthumb` for all, or `dvthumb` / `dathumb` / `dithumb` for video/audio/images only
 * for installing FFmpeg on windows, see [optional dependencies](#optional-dependencies)

@ -782,6 +784,7 @@ audio files are converted into spectrograms using FFmpeg unless you `--no-athumb
 images with the following names (see `--th-covers`) become the thumbnail of the folder they're in: `folder.png`, `folder.jpg`, `cover.png`, `cover.jpg`
 * the order is significant, so if both `cover.png` and `folder.jpg` exist in a folder, it will pick the first matching `--th-covers` entry (`folder.jpg`)
 * and, if you enable [file indexing](#file-indexing), it will also try those names as dotfiles (`.folder.jpg` and so), and then fallback on the first picture in the folder (if it has any pictures at all)
+* disable folderthumbs with `--th-covers no`

 enabling `multiselect` lets you click files to select them, and then shift-click another file for range-select
 * `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
@ -1337,7 +1340,8 @@ for the above example to work, add the commandline argument `-e2ts` to also scan
 # server config

 using arguments or config files, or a mix of both:
-* config files (`-c some.conf`) can set additional commandline arguments; see [./docs/example.conf](docs/example.conf) and [./docs/example2.conf](docs/example2.conf)
+* using a config-file (`-c some.conf`) is best, easier to read/maintain; see [./docs/example.conf](docs/example.conf)
+  * for complex and intricate setups, see how [./docs/example2.conf](docs/example2.conf) includes additional config-files/folders with `% copyparty.d` which loads [./docs/copyparty.d/some.conf](docs/copyparty.d/some.conf)
 * `kill -s USR1` (same as `systemctl reload copyparty`) to reload accounts and volumes from config files without restarting
  * or click the `[reload cfg]` button in the control-panel if the user has `a`/admin in any volume
  * changes to the `[global]` config section requires a restart to take effect
@ -1629,6 +1633,15 @@ authenticate with one of the following:
 * username `$password`, password `k`


+## wopi server
+
+edit office documents in the web-ui
+
+needs a wopi client to work, and the only supported wopi client is a selfhosted collabora online server; eventually onlyoffice will probably also be supported: [issue #1574](https://github.com/9001/copyparty/issues/1574)
+
+no further documentation or examples yet, [issue #1575](https://github.com/9001/copyparty/issues/1575)
+
+
 ## browser ux

 tweaking the ui
@ -2575,6 +2588,7 @@ buggy feature? rip it out  by setting any of the following environment variables
 | `PRTY_NO_IPV6`       | disable some ipv6 support (should not be necessary since windows 2000) |
 | `PRTY_NO_LZMA`       | disable streaming xz compression of incoming uploads |
 | `PRTY_NO_MP`         | disable all use of the python `multiprocessing` module (actual multithreading, cpu-count for parsers/thumbnailers) |
+| `PRTY_NO_UNIDATA`    | disable loading the unicodedata c-extension; saves 400k ram, breaks `--srch-nfkc` |
 | `PRTY_NO_SQLITE`     | disable all database-related functionality (file indexing, metadata indexing, most file deduplication logic) |
 | `PRTY_NO_TLS`        | disable native HTTPS support; if you still want to accept HTTPS connections then TLS must now be terminated by a reverse-proxy |
 | `PRTY_NO_TPOKE`      | disable systemd-tmpfilesd avoider |
@ -2650,8 +2664,6 @@ requires a [flake-enabled](https://nixos.wiki/wiki/Flakes) installation of nix

 some recommended dependencies are enabled by default; [override the package](https://github.com/9001/copyparty/blob/hovudstraum/contrib/package/nix/copyparty/default.nix#L3-L22) if you want to add/remove some features/deps

-`ffmpeg-full` was chosen over `ffmpeg-headless` mainly because we need `withWebp` (and `withOpenmpt` is also nice) and being able to use a cached build felt more important than optimizing for size at the time -- PRs welcome if you disagree 👍
-

 ## nixos module

@ -3096,6 +3108,23 @@ behavior that might be unexpected
  * or eliminate the problem entirely by only giving write-access to trustworthy people :^)


+## csp nonce
+
+unauthorized javascript is blocked  by means of the default [content-security-policy](https://developer.mozilla.org/en-US/docs/Web/HTTP/Guides/CSP) which enforces "script nonces", to help prevent XSS and similar
+
+usually this Just Works and is correctly configured by default; you can stop reading this section and move on, nothing to see here
+
+but if you are the unlucky 0.1% with a hosting-setup funky enough for this to not work as intended, then you will also be seeing this message: `Looks like javascript is broken; see "csp nonce" in the readme`
+
+there is two possible reasons why this might happen:
+
+1. your browser is simply too old to understand the javascript, which is not likely, because just about every browser is supported, even internet explorer 11
+
+2. something in your hosting-setup is tampering with the responses from copyparty and destroying this security feature; the culprit is probably a misconfigured reverseproxy, a CDN, a WAF, or some other mitm, but a popular offender is **"cloudflare rocket loader"**
+
+you can try to **temporarily** set global-options `--csp-ui no` and `--csp-dl no` and restart copyparty to check whether it is due to reason #2. Remember to refresh the webbrowser with CTRL-SHIFT-R to check properly. If that makes the problem go away, then turn them back off (**never** keep them enabled), restart copyparty, open the `Network` tab in the webbrowser, and refresh the website; you should see the `content-security-policy` header including a nonce, for example `nonce-BxcJbvdu1z3S/ycPBjVWuA==` which should also appear inside the HTML of that response like this: `<script nonce="BxcJbvdu1z3S/ycPBjVWuA==">` -- if it doesn't then that's the problem; something in your hosting stack is dangerously misconfigured
+
+
 ## cors

 cross-site request config
@ -3239,7 +3268,7 @@ enable sending [zeromq messages](#zeromq) from event-hooks: `pyzmq`

 enable [smb](#smb-server) support (**not** recommended): `impacket==0.13.0`

-`pyvips` gives higher quality thumbnails than `Pillow` and is 320% faster, using 270% more ram
+`pyvips` adds support for some additional image formats, but can use extreme amounts of RAM
 * to install `pyvips` on Linux: `sudo apt install libvips42 && python3 -m pip install --user -U pyvips`
 * to install `pyvips` on windows: `pip install --user -U "pyvips[binary]"`

--- a/bin/partyfuse.py
+++ b/bin/partyfuse.py
@ -626,7 +626,7 @@ class Gateway(object):
            "st_atime": ts,
            "st_mtime": ts,
            "st_ctime": ts,
-            "st_blocks": int((sz + 511) / 512),
+            "st_blocks": -int(-sz // 512),
        }

    def stat_file(self, ts, sz):
@ -638,7 +638,7 @@ class Gateway(object):
            "st_atime": ts,
            "st_mtime": ts,
            "st_ctime": ts,
-            "st_blocks": int((sz + 511) / 512),
+            "st_blocks": -int(-sz // 512),
        }


--- a/bin/u2c.py
+++ b/bin/u2c.py
@ -1,5 +1,5 @@
 #!/usr/bin/env python3
-from __future__ import print_function, unicode_literals
+from __future__ import division, print_function, unicode_literals

 S_VERSION = "2.22"
 S_BUILD_DT = "2026-06-13"
@ -398,7 +398,7 @@ class MTHash(object):
            self.csz = chunksz

            chunks = {}
-            nchunks = int(math.ceil(fsz / chunksz))
+            nchunks = -int(-fsz // chunksz)
            for nch in range(nchunks):
                self.work_q.put(nch)

@ -725,7 +725,7 @@ def up2k_chunksize(filesize):
    stepsize = 512 * 1024
    while True:
        for mul in [1, 2]:
-            nchunks = math.ceil(filesize * 1.0 / chunksize)
+            nchunks = -int(-filesize // chunksize)
            if nchunks <= 256 or (chunksize >= 32 * 1024 * 1024 and nchunks <= 4096):
                return chunksize

--- a/contrib/haproxy/copyparty.conf
+++ b/contrib/haproxy/copyparty.conf
@ -17,8 +17,12 @@ defaults

 listen foo1
  bind *:8081
+  http-request add-header X-Forwarded-Proto https if { ssl_fc }
+  http-request add-header X-Forwarded-Proto http unless { ssl_fc }
  server srv1 127.0.0.1:3923 maxconn 512

 listen foo2
  bind *:8082
+  http-request add-header X-Forwarded-Proto https if { ssl_fc }
+  http-request add-header X-Forwarded-Proto http unless { ssl_fc }
  server srv1 /dev/shm/party.sock maxconn 512
--- a/contrib/nixos/modules/copyparty.nix
+++ b/contrib/nixos/modules/copyparty.nix
@ -285,6 +285,7 @@ in

        environment = {
          PYTHONUNBUFFERED = "true";
+          NIX_SSL_CERT_FILE = "${pkgs.cacert}/etc/ssl/certs/ca-bundle.crt";
          XDG_CONFIG_HOME = externalStateDir;
        };

--- a/contrib/package/arch/PKGBUILD
+++ b/contrib/package/arch/PKGBUILD
@ -3,7 +3,7 @@
 # NOTE: You generally shouldn't use this PKGBUILD on Arch, as it is mainly for testing purposes. Install copyparty using pacman instead.

 pkgname=copyparty
-pkgver="1.20.17"
+pkgver="1.20.20"
 pkgrel=1
 pkgdesc="File server with accelerated resumable uploads, dedup, WebDAV, SFTP, FTP, TFTP, zeroconf, media indexer, thumbnails++"
 arch=("any")
@ -16,7 +16,7 @@ optdepends=("ffmpeg: thumbnails for videos, images (slower) and audio, music tag
            "python-mutagen: music tags (alternative)"
            "python-paramiko: sftp server",
            "python-pillow: thumbnails for images"
-            "python-pyvips: thumbnails for images (higher quality, faster, uses more ram)"
+            "python-pyvips: thumbnails for images (eats ram, prefer pillow)"
            "libkeyfinder: detection of musical keys"
            "python-pyopenssl: ftps functionality"
            "python-pyzmq: send zeromq messages from event-hooks"
@ -24,7 +24,7 @@ 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}/copyparty.conf" )
-sha256sums=("949553aeffea942a0ddabd3e12d28a643fea862d78930bb36e0accc66c4c9475")
+sha256sums=("a31f9e4a43e56608765e108353140784d50181c37e705e9ce8ed9f3899f57dfa")

 build() {
    cd "${srcdir}/${pkgname}-${pkgver}/copyparty/web"
--- a/contrib/package/makedeb-mpr/PKGBUILD
+++ b/contrib/package/makedeb-mpr/PKGBUILD
@ -2,7 +2,7 @@


 pkgname=copyparty
-pkgver=1.20.17
+pkgver=1.20.20
 pkgrel=1
 pkgdesc="File server with accelerated resumable uploads, dedup, WebDAV, SFTP, FTP, TFTP, zeroconf, media indexer, thumbnails++"
 arch=("any")
@ -21,7 +21,7 @@ optdepends=("ffmpeg: thumbnails for videos, images (slower) and audio, music tag
 )
 source=("https://github.com/9001/${pkgname}/releases/download/v${pkgver}/${pkgname}-${pkgver}.tar.gz")
 backup=("/etc/${pkgname}.d/init" )
-sha256sums=("949553aeffea942a0ddabd3e12d28a643fea862d78930bb36e0accc66c4c9475")
+sha256sums=("a31f9e4a43e56608765e108353140784d50181c37e705e9ce8ed9f3899f57dfa")

 build() {
    cd "${srcdir}/${pkgname}-${pkgver}/copyparty/web"
--- a/contrib/package/nix/copyparty/default.nix
+++ b/contrib/package/nix/copyparty/default.nix
@ -30,7 +30,7 @@
  # create thumbnails with Pillow; faster than FFmpeg / MediaProcessing
  withThumbnails ? true,

-  # create thumbnails with PyVIPS; even faster, uses more memory
+  # create thumbnails with PyVIPS; uses more memory, pillow is preferred
  # -- can be combined with Pillow to support more filetypes
  withFastThumbnails ? false,

--- 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/v1.20.17/copyparty-1.20.17.tar.gz",
-    "version": "1.20.17",
-    "hash": "sha256-lJVTrv/qlCoN2r0+EtKKZD/qhi14kwuzbgrMxmxMlHU="
+    "url": "https://github.com/9001/copyparty/releases/download/v1.20.20/copyparty-1.20.20.tar.gz",
+    "version": "1.20.20",
+    "hash": "sha256-ox+eSkPlZgh2XhCDUxQHhNUBgcN+cF6c6O2fOJn1ffo="
 }
--- a/contrib/package/nix/overlay.nix
+++ b/contrib/package/nix/overlay.nix
@ -16,7 +16,7 @@ let
    withMagic = true;
  };

-  call = attrs: final.python3.pkgs.callPackage ./copyparty ({ ffmpeg = final.ffmpeg-full; } // attrs);
+  call = attrs: final.python3.pkgs.callPackage ./copyparty ({ ffmpeg = final.ffmpeg-headless; } // attrs);
 in
 {
  copyparty = call { stable = true; };
--- a/copyparty/init.py
+++ b/copyparty/init.py
@ -1,5 +1,5 @@
 # coding: utf-8
-from __future__ import print_function, unicode_literals
+from __future__ import division, print_function, unicode_literals

 import os
 import platform
@ -135,6 +135,7 @@ web/tl/vie.js
 web/ui.css
 web/up2k.js
 web/util.js
+web/wopi.html
 """
 RES = set(zs.strip().split("\n"))
 RESM = {
--- a/copyparty/main.py
+++ b/copyparty/main.py
@ -1,6 +1,6 @@
 #!/usr/bin/env python3
 # coding: utf-8
-from __future__ import print_function, unicode_literals
+from __future__ import division, print_function, unicode_literals

 """copyparty: http file sharing hub (py2/py3)"""
 __author__ = "ed <copyparty@ocv.me>"
@ -1042,7 +1042,12 @@ def get_sects():
            .1   = when necessary, append a dot followed by a single digit
            .1!  = counter is always added, even when not necessary
            -3   = a hyphen followed by three-digit counter
-            no   = disable counter; overwrite existing logfile
+            no   = disable counter; append to existing file
+            del  = delete existing logfile and create new
+            over = overwrite existing logfile
+
+            append is not possible for .xz-compressed logfiles;
+            if logfile is *.xz and rlo is no then rlo will be .1
            """
            ),
        ],
@ -1329,7 +1334,7 @@ def add_upload(ap):
    ap2.add_argument("--nrand", metavar="NUM", type=int, default=9, help="randomized filenames length (volflag=nrand)")
    ap2.add_argument("--magic", action="store_true", help="enable filetype detection on nameless uploads (volflag=magic)")
    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("--sparse", metavar="MiB", type=int, default=1, 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")
@ -1427,7 +1432,7 @@ def add_auth(ap):
    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)")
-    ap2.add_argument("--ses-len", metavar="CHARS", type=int, default=20, help="session key length; default is 120 bits ((20//4)*4*6)")
+    ap2.add_argument("--ses-len", metavar="CHARS", type=int, default=24, help="session key length; default is 144 bits ((24//4)*4*6)")
    ap2.add_argument("--no-ses", action="store_true", help="disable sessions; use plaintext passwords in cookies")
    ap2.add_argument("--grp-all", metavar="NAME", type=u, default="acct", help="the name of the auto-generated group which contains every username which is known")
    ap2.add_argument("--ipu", metavar="CIDR=USR", type=u, action="append", help="\033[34mREPEATABLE:\033[0m users with IP matching \033[33mCIDR\033[0m are auto-authenticated as username \033[33mUSR\033[0m; example: [\033[32m172.16.24.0/24=dave]")
@ -1577,6 +1582,18 @@ def add_opds(ap):
    ap2.add_argument("--opds-exts", metavar="T,T", type=u, default="epub,cbz,pdf", help="file formats to list in OPDS feeds; leave empty to show everything (volflag=opds_exts)")


+def add_wopi(ap):
+    ap2 = ap.add_argument_group("WOPI options")
+    ap2.add_argument("--wopi", action="store_true", help="enable integration with office suites using WOPI")
+    ap2.add_argument("--wopi-api", metavar="URL", type=u, default="", help="URL that the WOPI-client should use to communicate with copyparty; default is same as user's webbrowser. Example: [\033[32mhttps://party.example.com/\033[0m]")
+    ap2.add_argument("--wopi-url", metavar="URL", type=u, default="", help="URL to your WOPI client; the host of e.g. Collabora Online. Example: [\033[32mhttps://code.example.com/\033[0m]")
+    ap2.add_argument("--wopi-urls", metavar="HOST=URL", type=u, action="append", help="\033[34mREPEATABLE:\033[0m maps http \033[33mHOST\033[0m copyparty being accessed by to specific WOPI client instance \033[33mURL\033[0m; falls back to \033[33m--wopi-url\033[0m; examples: [\033[32mparty.public.com=https://office.public.com/\033[0m], [\033[32mparty.internal.net:8443=https://office.internal.net:8443/\033[0m]")
+    ap2.add_argument("--wopi-crt", metavar="TXT", type=u, default="", help="if \033[33m--wopi-url\033[0m is selfsigned: path to ca.pem or cert.pem to expect/verify (can be [\033[32mno\033[0m] for full-yolo)")
+    ap2.add_argument("--wopi-crt-icn", action="store_true", help="if \033[33m--wopi-url\033[0m is selfsigned: ignore the CN (server ip/name) in cert")
+    ap2.add_argument("--wopi-ttl", metavar="SEC", type=int, default=1800, help="session lifetime; allow editing for this many seconds (default is 30 min)")
+    ap2.add_argument("--wopi-wdel", action="store_true", help="require permissions read+write+delete for writing to file; default is just read+write")
+
+
 def add_handlers(ap):
    ap2 = ap.add_argument_group("handlers (see --help-handlers)")
    ap2.add_argument("--on404", metavar="PY", type=u, action="append", help="\033[34mREPEATABLE:\033[0m handle 404s by executing \033[33mPY\033[0m file")
@ -1711,6 +1728,8 @@ def add_safety(ap):
    ap2.add_argument("--loris", metavar="B", type=int, default=60, help="if a client maxes out the server connection limit without sending headers, ban it for \033[33mB\033[0m minutes; disable with [\033[32m0\033[0m]")
    ap2.add_argument("--acao", metavar="V[,V]", type=u, default="*", help="Access-Control-Allow-Origin; list of origins (domains/IPs without port) to accept requests from; [\033[32mhttps://1.2.3.4\033[0m]. Default [\033[32m*\033[0m] allows requests from all sites but removes cookies and http-auth; only ?pw=hunter2 survives")
    ap2.add_argument("--acam", metavar="V[,V]", type=u, default="GET,HEAD", help="Access-Control-Allow-Methods; list of methods to accept from offsite ('*' behaves like \033[33m--acao\033[0m's description)")
+    if FULL_HELP or ANYWIN:
+        ap2.add_argument("--unsafe-tools", action="store_true", help="windows-only: allow running programs (ffmpeg, dcraw_emu, ...) when their location is inside a folder that can be uploaded to (dangerous due to DLL-hijacking)")
    if FULL_HELP or (not ANYWIN and not UNIX):
        ap2.add_argument("--th-bwrap", metavar="CMD", type=u, default=th_bwrap, help="optional bwrap sandbox command for FFmpeg and dcraw (Linux-only)")
        ap2.add_argument("--use-bwrap", metavar="TXT", type=u, default="n", help="a/n/f; [\033[32ma\033[0m]=auto (yes if the program 'bwrap' exists (assumes it works)), [\033[32mn\033[0m]=no (assumes bwrap is broken), [\033[32mf\033[0m]=force (disables FFmpeg if bwrap unavailable)")
@ -1744,7 +1763,7 @@ def add_logging(ap):
    ap2.add_argument("-q", action="store_true", help="quiet; disable most STDOUT messages")
    ap2.add_argument("-lo", metavar="PATH", type=u, default="", help="logfile; use .txt for plaintext or .xz for compressed. Example: \033[32mcpp-%%Y-%%m%%d-%%H%%M%%S.txt.xz\033[0m (NB: some errors may appear on STDOUT only)")
    ap2.add_argument("--flo", metavar="N", type=int, default=1, help="log format for \033[33m-lo\033[0m; [\033[32m1\033[0m]=classic/colors, [\033[32m2\033[0m]=no-color")
-    ap2.add_argument("--rlo", metavar="TXT", type=u, default=".1", help="logrotate counter format; see \033[33m--help-rlo\033[0m")
+    ap2.add_argument("--rlo", metavar="TXT", type=u, default="no", help="logrotate counter format; see \033[33m--help-rlo\033[0m")
    ap2.add_argument("--logrot-sig", metavar="S", type=u, default="", help="immediately logrotate when unix-signal \033[33mS\033[0m is received; examples: [\033[32mSIGHUP\033[0m], [\033[32mHUP\033[0m], [\033[32m1\033[0m]")
    ap2.add_argument("--no-ansi", action="store_true", default=not VT100, help="disable colors; same as environment-variable NO_COLOR")
    ap2.add_argument("--ansi", action="store_true", help="force colors; overrides environment-variable NO_COLOR")
@ -1795,7 +1814,7 @@ def add_thumbnail(ap):
    ap2.add_argument("--th-x3", metavar="TXT", type=u, default="n", help="show thumbs at 3x resolution; client can override in UI unless force. [\033[32my\033[0m]=yes, [\033[32mn\033[0m]=no, [\033[32mfy\033[0m]=force-yes, [\033[32mfn\033[0m]=force-no (volflag=th3x)")
    ap2.add_argument("--th-qv", metavar="N", type=int, default=40, help="webp/jpg thumbnail quality (10~90); higher is larger filesize and better quality (volflag=th_qv)")
    ap2.add_argument("--th-qvx", metavar="N", type=int, default=64, help="jxl thumbnail quality (10~90); higher is larger filesize and better quality (volflag=th_qvx)")
-    ap2.add_argument("--th-dec", metavar="LIBS", default="vips,raw,pil,ff", help="image decoders, in order of preference")
+    ap2.add_argument("--th-dec", metavar="LIBS", default="raw,pil,ff,vips", help="image decoders, in order of preference")
    ap2.add_argument("--th-no-jpg", action="store_true", help="disable jpg output")
    ap2.add_argument("--th-no-webp", action="store_true", help="disable webp output")
    ap2.add_argument("--th-no-jxl", action="store_true", help="disable jpeg-xl output")
@ -1807,21 +1826,21 @@ def add_thumbnail(ap):
    ap2.add_argument("--th-maxage", metavar="SEC", type=int, default=604800, help="max folder age -- folders which haven't been poked for longer than \033[33m--th-poke\033[0m seconds will get deleted every \033[33m--th-clean\033[0m seconds")
    ap2.add_argument("--th-pregen", metavar="F,F", type=u, default="", help="pregenerate thumbnails on startup; \033[33mF,F\033[0m is comma-separated list of formats; example: [\033[32mj,jf,w,w3,wf,wf3,x,xf\033[0m] NOTE: remember to set \033[33m--th-maxage 123456789\033[0m (volflag=th_pregen)")
    ap2.add_argument("--th-pre-rl", metavar="SEC", type=int, default=30, help="while pregen is running, ratelimit the thumbnailer logger to one message every \033[33mSEC\033[0m seconds (only works with \033[33m-j1\033[0m); set 0 to disable ratelimit")
-    ap2.add_argument("--th-covers", metavar="N,N", type=u, default="folder.png,folder.jpg,cover.png,cover.jpg", help="folder thumbnails to stat/look for; enabling \033[33m-e2d\033[0m will make these case-insensitive, and try them as dotfiles (.folder.jpg), and also automatically select thumbnails for all folders that contain pics, even if none match this pattern")
+    ap2.add_argument("--th-covers", metavar="N,N", type=u, default="folder.png,folder.jpg,cover.png,cover.jpg", help="folder thumbnails to stat/look for; enabling \033[33m-e2d\033[0m will make these case-insensitive, and try them as dotfiles (.folder.jpg), and also automatically select thumbnails for all folders that contain pics, even if none match this pattern (volflag=th_covers)")
    ap2.add_argument("--th-spec-p", metavar="N", type=u, default=1, help="for music, do spectrograms or embedded coverart? [\033[32m0\033[0m]=only-art, [\033[32m1\033[0m]=prefer-art, [\033[32m2\033[0m]=only-spec")
    ap2.add_argument("--th-spec-fl", action="store_true", help="generate spectrograms with logarithmic frequency scale instead of linear")
    # https://pillow.readthedocs.io/en/stable/handbook/image-file-formats.html
    # https://github.com/libvips/libvips
    # https://stackoverflow.com/a/47612661
    # ffmpeg -hide_banner -demuxers | awk '/^ D  /{print$2}' | while IFS= read -r x; do ffmpeg -hide_banner -h demuxer=$x; done | grep -E '^Demuxer |extensions:'
-    ap2.add_argument("--th-r-pil", metavar="T,T", type=u, default="avif,avifs,blp,bmp,cbz,dcx,dds,dib,emf,eps,epub,fits,flc,fli,fpx,gif,heic,heics,heif,heifs,icns,ico,im,j2p,j2k,jp2,jpeg,jpg,jpx,jxl,pbm,pcx,pgm,png,pnm,ppm,psd,qoi,sgi,spi,tga,tif,tiff,webp,wmf,xbm,xpm", help="image formats to decode using pillow")
+    ap2.add_argument("--th-r-pil", metavar="T,T", type=u, default="avif,avifs,blp,bmp,cbz,dcx,dds,dib,emf,eps,epub,fits,flc,fli,fpx,gif,heic,heics,heif,heifs,icns,ico,im,j2p,j2k,jp2,jpeg,jpg,jpx,jxl,kra,ora,pbm,pcx,pgm,png,pnm,ppm,psd,qoi,sgi,spi,tga,tif,tiff,webp,wmf,xbm,xpm", help="image formats to decode using pillow")
    ap2.add_argument("--th-r-vips", metavar="T,T", type=u, default="3fr,arw,avif,cr2,cr3,crw,dcr,dng,erf,exr,fit,fits,fts,gif,hdr,heic,heics,heif,heifs,jp2,jpeg,jpg,jpx,jxl,k25,kdc,mdc,mef,mrw,nef,nii,nrw,orf,pfm,pgm,png,ppm,raf,raw,rw2,sr2,srf,srw,svg,tif,tiff,webp,x3f", help="image formats to decode using pyvips")
    ap2.add_argument("--th-r-raw", metavar="T,T", type=u, default="3fr,arw,cr2,cr3,crw,dcr,dng,erf,k25,kdc,mdc,mef,mos,mrw,nef,nrw,orf,pef,raf,raw,rw2,sr2,srf,srw,x3f", help="image formats to decode using rawpy (if available) or libraw's dcraw_emu")
-    ap2.add_argument("--th-r-ffi", metavar="T,T", type=u, default="apng,avif,avifs,bmp,cbz,dds,dib,epub,fit,fits,fts,gif,hdr,heic,heics,heif,heifs,icns,ico,jp2,jpeg,jpg,jpx,jxl,pbm,pcx,pfm,pgm,png,pnm,ppm,psd,qoi,sgi,tga,tif,tiff,webp,xbm,xpm", help="image formats to decode using ffmpeg")
+    ap2.add_argument("--th-r-ffi", metavar="T,T", type=u, default="apng,avif,avifs,bmp,cbz,dds,dib,epub,fit,fits,fts,gif,hdr,heic,heics,heif,heifs,icns,ico,jp2,jpeg,jpg,jpx,jxl,kra,ora,pbm,pcx,pfm,pgm,png,pnm,ppm,psd,qoi,sgi,tga,tif,tiff,webp,xbm,xpm", help="image formats to decode using ffmpeg")
    ap2.add_argument("--th-r-ffv", metavar="T,T", type=u, default="3gp,asf,av1,avc,avi,flv,h264,h265,hevc,m4v,mjpeg,mjpg,mkv,mov,mp4,mpeg,mpeg2,mpegts,mpg,mpg2,mts,nut,ogm,ogv,rm,ts,vob,webm,wmv", help="video formats to decode using ffmpeg")
    ap2.add_argument("--th-r-ffa", metavar="T,T", type=u, default="aac,ac3,aif,aiff,alac,alaw,amr,apac,ape,au,bcstm,bfstm,brstm,bonk,dfpwm,dts,flac,gsm,ilbc,it,itgz,itxz,itz,m4a,m4b,m4r,mdgz,mdxz,mdz,mka,mo3,mod,mp2,mp3,mpc,mptm,mt2,mulaw,oga,ogg,okt,opus,ra,s3m,s3gz,s3xz,s3z,tak,tta,ulaw,wav,wma,wv,xm,xmgz,xmxz,xmz,xpk", help="audio formats to decode using ffmpeg")
    ap2.add_argument("--th-spec-cnv", metavar="T", type=u, default="it,itgz,itxz,itz,mdgz,mdxz,mdz,mo3,mod,s3m,s3gz,s3xz,s3z,xm,xmgz,xmxz,xmz,xpk", help="audio formats which provoke https://trac.ffmpeg.org/ticket/10797 (huge ram usage for s3xmodit spectrograms)")
-    ap2.add_argument("--au-unpk", metavar="E=F.C", type=u, default="mdz=mod.zip, mdgz=mod.gz, mdxz=mod.xz, s3z=s3m.zip, s3gz=s3m.gz, s3xz=s3m.xz, xmz=xm.zip, xmgz=xm.gz, xmxz=xm.xz, itz=it.zip, itgz=it.gz, itxz=it.xz, cbz=jpg.cbz, epub=jpg.epub", help="audio/image formats to decompress before passing to ffmpeg")
+    ap2.add_argument("--au-unpk", metavar="E=F.C", type=u, default="mdz=mod.zip, mdgz=mod.gz, mdxz=mod.xz, s3z=s3m.zip, s3gz=s3m.gz, s3xz=s3m.xz, xmz=xm.zip, xmgz=xm.gz, xmxz=xm.xz, itz=it.zip, itgz=it.gz, itxz=it.xz, cbz=jpg.cbz, epub=jpg.epub, kra=png.kra, ora=png.ora", help="audio/image formats to decompress before passing to ffmpeg")


 def add_transcoding(ap):
@ -1882,7 +1901,8 @@ def add_db_general(ap, hcores):
    ap2.add_argument("--hash-mt", metavar="CORES", type=int, default=hcores, help="num cpu cores to use for file hashing; set 0 or 1 for single-core hashing")
    ap2.add_argument("--re-maxage", metavar="SEC", type=int, default=0, help="rescan filesystem for changes every \033[33mSEC\033[0m seconds; 0=off (volflag=scan)")
    ap2.add_argument("--db-act", metavar="SEC", type=float, default=10.0, help="defer any scheduled volume reindexing until \033[33mSEC\033[0m seconds after last db write (uploads, renames, ...)")
-    ap2.add_argument("--srch-icase", action="store_true", help="case-insensitive search for all unicode characters (the default is icase for just ascii). NOTE: will make searches much slower (around 4x), and NOTE: only applies to filenames/paths, not tags")
+    ap2.add_argument("--srch-icase", action="store_true", help="case-insensitive search for all unicode characters (the default is icase for just ascii). NOTE: will make searches much slower (around 3x), and NOTE: only applies to filenames/paths, not tags")
+    ap2.add_argument("--srch-nfkc", action="store_true", help="case-insensitive and unicode-normalization-insensitive search (NFC/NFD) for filenames/paths; slightly slower than \033[33m--srch-icase\033[0m (about 15%% slower / 87%% as fast)")
    ap2.add_argument("--srch-time", metavar="SEC", type=int, default=45, help="search deadline -- terminate searches running for more than \033[33mSEC\033[0m seconds")
    ap2.add_argument("--srch-hits", metavar="N", type=int, default=7999, help="max search results to allow clients to fetch; 125 results will be shown initially")
    ap2.add_argument("--srch-excl", metavar="PTN", type=u, default="", help="regex: exclude files from search results if the file-URL matches \033[33mPTN\033[0m (case-sensitive). Example: [\033[32mpassword|logs/[0-9]\033[0m] any URL containing 'password' or 'logs/DIGIT' (volflag=srch_excl)")
@ -2092,6 +2112,7 @@ def run_argparse(
    add_tftp(ap)
    add_smb(ap)
    add_opds(ap)
+    add_wopi(ap)
    add_safety(ap)
    add_salt(ap, fk_salt, dk_salt, ah_salt)
    add_optouts(ap)
--- a/copyparty/version.py
+++ b/copyparty/version.py
@ -1,8 +1,8 @@
 # coding: utf-8

-VERSION = (1, 20, 18)
+VERSION = (1, 20, 20)
 CODENAME = "sftp is fine too"
-BUILD_DT = (2026, 7, 9)
+BUILD_DT = (2026, 8, 4)

 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
@ -1,5 +1,5 @@
 # coding: utf-8
-from __future__ import print_function, unicode_literals
+from __future__ import division, print_function, unicode_literals

 import argparse
 import base64
@ -2612,6 +2612,13 @@ class AuthSrv(object):
                t = "WARNING: volume [/%s]: invalid value specified for ext-th: %s"
                self.log(t % (vol.vpath, etv), 3)

+            zsl = [x.strip() for x in vol.flags["th_covers"].split(",")]
+            zsl = [x for x in zsl if x not in ("", "no")]
+            vol.flags["th_coversl"] = zsl
+            vol.flags["th_coversd"] = zsl + ["." + x for x in zsl]
+            vol.flags["th_covers_set"] = set(vol.flags["th_coversl"])
+            vol.flags["th_coversd_set"] = set(vol.flags["th_coversd"])
+
            zsl = [x.strip() for x in vol.flags["rw_edit"].split(",")]
            zsl = [x for x in zsl if x]
            vol.flags["rw_edit"] = ",".join(zsl)
@ -2653,10 +2660,11 @@ class AuthSrv(object):
            if head_s and not head_s.endswith("\n"):
                head_s += "\n"

+            zs2 = "Content-Security-Policy: %s\r\n"
            zs = vol.flags.get("csp_ui", "")
-            csp_ui = "Content-Security-Policy: %s\r\n" % (zs,) if zs else ""
+            csp_ui = zs2 % (zs,) if zs.lower() not in ("", "no") else ""
            zs = vol.flags.get("csp_dl", "")
-            csp_dl = "Content-Security-Policy: %s\r\n" % (zs,) if zs else ""
+            csp_dl = zs2 % (zs,) if zs.lower() not in ("", "no") else ""

            zs = "X-Content-Type-Options: nosniff\r\n"
            if "norobots" in vol.flags:
@ -2754,7 +2762,8 @@ class AuthSrv(object):

                for k in drop:
                    t = 'cannot enable [%s] for volume "/%s" because this requires one of the following: e2d / e2ds / e2dsa  (either as volflag or global-option)'
-                    self.log(t % (k, vol.vpath), 1)
+                    if not (enshare and vp.startswith(shrs)):
+                        self.log(t % (k, vol.vpath), 1)
                    vol.flags.pop(k)

            zi = vol.flags.get("lifetime") or 0
@ -2863,12 +2872,13 @@ class AuthSrv(object):
                continue
            try:
                bos.makedirs(vol.realpath, vf=vol.flags)
-                files = os.listdir(vol.realpath)
-                for fn in files:
+                for fn, _ in statdir(
+                    self.log_func, not self.args.no_scandir, False, vol.realpath, True
+                ):
                    fn2 = fn.lower()
                    if fn == fn2:
                        fn2 = fn.upper()
-                    if fn == fn2 or fn2 in files:
+                    if fn == fn2:
                        continue
                    is_ci = os.path.exists(os.path.join(vol.realpath, fn2))
                    ccs = "y" if is_ci else "n"
@ -3037,6 +3047,10 @@ class AuthSrv(object):
                t = "hint: enable upload deduplication with --dedup (but see readme for consequences)"
                self.log(t, 6)

+            if MACOS and not self.args.srch_nfkc:
+                t = "hint: enable --srch-nfkc to improve unicode filename/path search on MacOS"
+                self.log(t, 6)
+
            zv, _ = vfs.get("/", "*", False, False)
            zs = zv.realpath.lower()
            if zs in ("/", "c:\\") or zs.startswith(r"c:\windows"):
@ -3047,6 +3061,8 @@ class AuthSrv(object):
            zv, _ = vfs.get("", "*", False, True, err=999)
            if self.warn_anonwrite and verbosity > 4 and os.getcwd() == zv.realpath:
                t = "anyone can write to the current directory: {}\n"
+                if ANYWIN:
+                    t += "/!\\ NOTE: because you are using Windows, this is kinda dangerous (DLL-hijacking); you should configure accounts and volumes if this is accessible from an untrusted network\n"
                self.log(t.format(zv.realpath), c=1)

            self.warn_anonwrite = False
@ -3240,6 +3256,7 @@ class AuthSrv(object):

        self.js_ls = {}
        self.js_htm = ""
+        self.md_htm = ""
        for vp, vn in self.vfs.all_nodes.items():
            if enshare and vp.startswith(shrs):
                continue  # propagates later in this func
@ -3331,6 +3348,8 @@ class AuthSrv(object):
                zs2 = getattr(self.args, zs, "")
                if zs2:
                    js_htm[zs] = zs2
+            if self.args.wopi:
+                js_htm["have_wopi"] = True

            zs = "have_emp md_no_br"
            md_htm = {x: js_htm[x] for x in zs.split(" ")}
@ -3356,6 +3375,7 @@ class AuthSrv(object):
            dbv = vol.get_dbv("")[0]
            vol.js_ls = vol.js_ls or dbv.js_ls or {}
            vol.js_htm = vol.js_htm or dbv.js_htm or "{}"
+            vol.md_htm = vol.md_htm or dbv.md_htm or "{}"

            zs = str(vol.flags.get("tcolor") or self.args.tcolor)
            vol.flags["tcolor"] = zs.lstrip("#")
@ -3783,12 +3803,12 @@ class AuthSrv(object):
            "",
        ]

-        csv = set("i p th_covers zm_on zm_off zs_on zs_off".split())
+        csv = set("i p zm_on zm_off zs_on zs_off".split())
        zs = "c ihead ohead mtm mtp on403 on404 xac xad xar xau xiu xban xbc xbd xbr xbu xm"
        lst = set(zs.split())
        askip = set("a v c vc cgen exp_lg exp_md theme".split())

-        t = "exp_lg exp_md ext_th_d mv_re_r mv_re_t rm_re_r rm_re_t srch_re_dots srch_re_nodot"
+        t = "emb_all emb_lgs emb_mds exp_lg exp_md ext_th_d ls_q_m mv_re_r mv_re_t rm_re_r rm_re_t oh_f oh_g rw_edit_set srch_re_dots srch_re_nodot th_coversd th_coversl th_covers_set th_coversd_set"
        fskip = set(t.split())

        # keymap from argv to vflag
@ -3915,6 +3935,9 @@ class AuthSrv(object):
                except:
                    pass

+                if k in ("chmod_d", "chmod_f"):
+                    v = "%o" % (v,)
+
                try:
                    ak = vmap[k]
                    v2 = getattr(self.args, ak)
@ -3924,7 +3947,7 @@ class AuthSrv(object):
                    except:
                        pass

-                    if v2 is v:
+                    if v2 == v:
                        continue
                except:
                    pass
@ -3968,7 +3991,7 @@ class AuthSrv(object):

 def derive_args(args: argparse.Namespace) -> None:
    args.have_idp_hdrs = bool(args.idp_h_usr or args.idp_hm_usr)
-    args.have_ipu_or_ipr = bool(args.ipu or args.ipr)
+    args.have_ipu_or_ipr = bool(args.ipu or args.ipr or args.wopi)


 def n_du_who(s: str) -> int:
--- a/copyparty/bos/bos.py
+++ b/copyparty/bos/bos.py
@ -1,5 +1,5 @@
 # coding: utf-8
-from __future__ import print_function, unicode_literals
+from __future__ import division, print_function, unicode_literals

 import os
 import time
--- a/copyparty/bos/path.py
+++ b/copyparty/bos/path.py
@ -1,5 +1,5 @@
 # coding: utf-8
-from __future__ import print_function, unicode_literals
+from __future__ import division, print_function, unicode_literals

 import os

--- a/copyparty/broker_mp.py
+++ b/copyparty/broker_mp.py
@ -1,5 +1,5 @@
 # coding: utf-8
-from __future__ import print_function, unicode_literals
+from __future__ import division, print_function, unicode_literals

 import threading
 import time
--- a/copyparty/broker_mpw.py
+++ b/copyparty/broker_mpw.py
@ -1,5 +1,5 @@
 # coding: utf-8
-from __future__ import print_function, unicode_literals
+from __future__ import division, print_function, unicode_literals

 import argparse
 import os
--- a/copyparty/broker_thr.py
+++ b/copyparty/broker_thr.py
@ -1,5 +1,5 @@
 # coding: utf-8
-from __future__ import print_function, unicode_literals
+from __future__ import division, print_function, unicode_literals

 import os
 import threading
--- a/copyparty/broker_util.py
+++ b/copyparty/broker_util.py
@ -1,5 +1,5 @@
 # coding: utf-8
-from __future__ import print_function, unicode_literals
+from __future__ import division, print_function, unicode_literals

 import argparse

--- a/copyparty/cfg.py
+++ b/copyparty/cfg.py
@ -1,5 +1,5 @@
 # coding: utf-8
-from __future__ import print_function, unicode_literals
+from __future__ import division, print_function, unicode_literals

 # awk -F\" '/add_argument\("-[^-]/{print(substr($2,2))}' copyparty/__main__.py | sort | tr '\n' ' '
 zs = "a c e2d e2ds e2dsa e2t e2ts e2tsr e2v e2vp e2vu ed emp i j lo mcr mte mth mtm mtp nb nc nid nih nth nw p q s ss sss v z zv"
@ -157,6 +157,7 @@ def vf_vmap() -> dict[str, str]:
        "tail_tmax",
        "tail_who",
        "tcolor",
+        "th_covers",
        "th_pregen",
        "th_qv",
        "th_qvx",
@ -321,6 +322,7 @@ flagcats = {
        "th3x": "3x resolution (y/n/fy/fn)",
        "th_qv=40": "webp/jpg thumbnail quality (10~90)",
        "th_qvx=40": "jxl thumbnail quality (10~90)",
+        "th_covers=a.jpg,a.png": "filenames to prefer as folder-thumbs",
        "convt": "convert-to-image timeout in seconds",
        "aconvt": "convert-to-audio timeout in seconds",
        "th_spec_p=1": "make spectrograms? 0=never 1=fallback 2=always",
--- a/copyparty/dxml.py
+++ b/copyparty/dxml.py
@ -1,5 +1,5 @@
 # coding: utf-8
-from __future__ import print_function, unicode_literals
+from __future__ import division, print_function, unicode_literals

 import importlib
 import sys
--- a/copyparty/fsutil.py
+++ b/copyparty/fsutil.py
@ -1,5 +1,5 @@
 # coding: utf-8
-from __future__ import print_function, unicode_literals
+from __future__ import division, print_function, unicode_literals

 import argparse
 import json
@ -248,7 +248,7 @@ def ramdisk_chk(asrv: AuthSrv) -> None:
        t2 = ["\n  volume=[/%s], abspath=%r, type=%s, root=%r" % x for x in mods]
        log("vfs", t + "".join(t2) + "\n", 1)

-    assume = "mac" if MACOS else "lin"
+    assume = "mac" if MACOS else "win" if ANYWIN else "lin"
    for vol in asrv.vfs.all_nodes.values():
        if not vol.realpath or vol.flags.get("is_file"):
            continue
@ -263,3 +263,4 @@ def ramdisk_chk(asrv: AuthSrv) -> None:
        htm = json.loads(vol.js_htm)
        vol.flags["fsnt"] = vol.js_ls["fsnt"] = htm["fsnt"] = fs
        vol.js_htm = json_hesc(json.dumps(htm))
+        # md_htm is dontcare; only relevant for up2k request body
--- a/copyparty/ftpd.py
+++ b/copyparty/ftpd.py
@ -1,5 +1,5 @@
 # coding: utf-8
-from __future__ import print_function, unicode_literals
+from __future__ import division, print_function, unicode_literals

 import argparse
 import errno
@ -149,6 +149,7 @@ class FtpFs(AbstractedFS):
        self.hub: "SvcHub" = cmd_channel.hub
        self.args = cmd_channel.args
        self.uname = cmd_channel.uname
+        self.log_src = "%s:FTP" % (cmd_channel.cli_ip,)

        self.cwd = "/"  # pyftpdlib convention of leading slash
        self.root = "/var/lib/empty"
@ -156,8 +157,8 @@ class FtpFs(AbstractedFS):
        self.listdirinfo = self.listdir
        self.chdir(".")

-    def log(self, msg: str, c: Union[int, str] = 0) -> None:
-        self.hub.log("ftpd", msg, c)
+    def clog(self, msg: str, c: Union[int, str] = 0) -> None:
+        self.hub.log(self.log_src, msg, c)

    def v2a(
        self,
@ -238,6 +239,8 @@ class FtpFs(AbstractedFS):
        return True

    def open(self, filename: str, mode: str) -> typing.IO[Any]:
+        self.clog("open(%r,%r) @%s" % (filename, mode, self.uname))
+
        r = "r" in mode
        w = "w" in mode or "a" in mode or "+" in mode

@ -255,7 +258,7 @@ class FtpFs(AbstractedFS):
            xbu = vfs.flags.get("xbu")
            if xbu:
                hr = runhook(
-                    self.log,
+                    self.clog,
                    None,
                    self.hub.up2k,
                    "xbu.ftp",
@ -275,7 +278,7 @@ class FtpFs(AbstractedFS):
                if t or hr.get("rc") != 0:
                    if not t:
                        t = "upload blocked by xbu server config: %r" % (filename,)
-                    self.log(t, 3)
+                    self.clog(t, 3)
                    raise FSE(t)

        if w and need_unlink:  # type: ignore  # !rm
@ -300,12 +303,13 @@ class FtpFs(AbstractedFS):

            # Don't unlink file for append mode
            elif "a" not in mode:
-                wunlink(self.log, ap, VF_CAREFUL)
+                wunlink(self.clog, ap, VF_CAREFUL)

        ret = open(fsenc(ap), mode, self.args.iobuf)
        if w and "fperms" in vfs.flags:
            set_fperms(ret, vfs.flags)

+        self.clog(" `-- %r" % (ap,))
        return ret

    def chdir(self, path: str) -> None:
@ -331,10 +335,12 @@ class FtpFs(AbstractedFS):
        self.cwd = nwd

    def mkdir(self, path: str) -> None:
+        self.clog("mkdir(%r) @%s" % (path, self.uname))
        ap, vfs, _ = self.rv2a(path, w=True)
        bos.makedirs(ap, vf=vfs.flags)  # filezilla expects this

    def listdir(self, path: str) -> list[str]:
+        self.clog("ls(%r) @%s" % (path, self.uname))
        vpath = join(self.cwd, path)
        try:
            ap, vfs, rem = self.v2a(vpath, True, False)
@ -384,6 +390,7 @@ class FtpFs(AbstractedFS):
            return ret

    def rmdir(self, path: str) -> None:
+        self.clog("rmdir(%r) @%s" % (path, self.uname))
        ap = self.rv2a(path, d=True)[0]
        try:
            bos.rmdir(ap)
@ -392,6 +399,7 @@ class FtpFs(AbstractedFS):
                raise

    def remove(self, path: str) -> None:
+        self.clog("rm(%r) @%s" % (path, self.uname))
        if self.args.no_del:
            raise FSE("The delete feature is disabled in server config")

@ -402,6 +410,7 @@ class FtpFs(AbstractedFS):
            raise FSE(str(ex))

    def rename(self, src: str, dst: str) -> None:
+        self.clog("mv(%r,%r) @%s" % (src, dst, self.uname))
        if self.args.no_mv:
            raise FSE("The rename/move feature is disabled in server config")

@ -431,6 +440,7 @@ class FtpFs(AbstractedFS):
            return st

    def utime(self, path: str, timeval: float) -> None:
+        self.clog("utime(%r,%r) @%s" % (path, timeval, self.uname))
        ap = self.rv2a(path, w=True)[0]
        bos.utime_c(logging.warning, ap, int(timeval), False)

@ -438,6 +448,9 @@ class FtpFs(AbstractedFS):
        ap = self.rv2a(path)[0]
        return bos.stat(ap)

+    def readlink(self, *a) -> None:
+        raise OSError(errno.EINVAL, "nope")
+
    def isfile(self, path: str) -> bool:
        try:
            st = self.stat(path)
@ -480,9 +493,13 @@ class FtpFs(AbstractedFS):
    def get_user_by_uid(self, uid: int) -> str:
        return "root"

-    def get_group_by_uid(self, gid: int) -> str:
+    def get_group_by_gid(self, gid: int) -> str:
        return "root"

+    def mkstemp(self, *a, **ka):
+        self.clog("mkstemp%r @%s" % (a, self.uname))
+        raise FSE("nope")
+

 class FtpHandler(FTPHandler):
    abstracted_fs = FtpFs
@ -511,6 +528,7 @@ class FtpHandler(FTPHandler):
            return

        self.cli_ip = cip
+        self.log_src = "%s:FTP" % (cip,)

        # abspath->vpath mapping to resolve log_transfer paths
        self.vfs_map: dict[str, str] = {}
@ -518,6 +536,15 @@ class FtpHandler(FTPHandler):
        # reduce non-debug logging
        self.log_cmds_list = [x for x in self.log_cmds_list if x not in ("CWD", "XCWD")]

+    def clog(self, msg: str, c: Union[int, str] = 0) -> None:
+        self.hub.log(self.log_src, msg, c)
+
+    def ftp_NOOP(self, *a) -> None:
+        self.respond("200 pong", logging.debug)
+
+    def ftp_STOU(self, *a) -> None:
+        self.respond("550 nope", logging.warning)
+
    def ftp_STOR(self, file: str, mode: str = "w") -> Any:
        # Optional[str]
        vp = join(self.fs.cwd, file).lstrip("/")
@ -530,7 +557,7 @@ class FtpHandler(FTPHandler):
        xbu = vfs.flags.get("xbu")
        if xbu:
            hr = runhook(
-                None,
+                self.clog,
                None,
                self.hub.up2k,
                "xbu.ftpd",
--- a/copyparty/httpcli.py
+++ b/copyparty/httpcli.py
@ -1,5 +1,5 @@
 # coding: utf-8
-from __future__ import print_function, unicode_literals
+from __future__ import division, print_function, unicode_literals

 import argparse  # typechk
 import copy
@ -30,7 +30,7 @@ try:
 except:
    pass

-from .__init__ import ANYWIN, RES, RESM, TYPE_CHECKING, EnvParams, unicode
+from .__init__ import ANYWIN, PY2, RES, RESM, TYPE_CHECKING, EnvParams, unicode
 from .__version__ import S_VERSION
 from .authsrv import LEELOO_DALLAS, VFS  # typechk
 from .bos import bos
@ -149,6 +149,11 @@ if True:  # pylint: disable=using-constant-test
 if TYPE_CHECKING:
    from .httpconn import HttpConn

+if PY2:
+    from urllib2 import urlopen
+else:
+    from urllib.request import urlopen
+
 if not hasattr(socket, "AF_UNIX"):
    setattr(socket, "AF_UNIX", -9001)

@ -171,6 +176,27 @@ RSS_SORT = {"m": "mt", "u": "at", "n": "fn", "s": "sz"}
 ACODE2_FMT = set(["opus", "owa", "caf", "mp3", "flac", "wav"])
 IDX_HTML = set(["index.htm", "index.html"])

+# coolwsd-26.04.2.3 discovery editnew; browser.js wopi_set is superset of this
+WOPI_NEW = (
+    ".odt",
+    ".fodt",
+    ".ott",
+    ".docx",
+    ".dotx",
+    ".rtf",
+    ".odm",
+    ".ods",
+    ".fods",
+    ".ots",
+    ".xlsx",
+    ".odp",
+    ".fodp",
+    ".otp",
+    ".pptx",
+    ".fodg",
+    ".otg",
+)
+
 A_FILE = os.stat_result(
    (0o644, -1, -1, 1, 1000, 1000, 8, 0x39230101, 0x39230101, 0x39230101)
 )
@ -813,6 +839,22 @@ class HttpCli(object):
                if not ipr[self.uname].map(self.ip):
                    self.log("username [%s] rejected by --ipr" % (self.uname,), 3)
                    self.uname = "*"
+            if self.args.wopi and "access_token" in self.uparam:
+                wopi_a = self.uparam["access_token"]
+                try:
+                    wopi_f = self.conn.hsrv.wopi_files[wopi_a]
+                    if wopi_f["expires"] < time.time():
+                        raise Exception("expired")
+                    uname = wopi_f["uname"]
+                    self.asrv.vfs.get(
+                        wopi_f["vp"], uname, True, True, False, self.args.wopi_wdel
+                    )
+                    self.uname = uname
+                except Exception as ex:
+                    self.conn.hsrv.wopi_files.pop(wopi_a, None)
+                    self.cbonk(self.conn.hsrv.gpwd, wopi_a, "wopi", "bad wopi tokens")
+                    self.loud_reply("bad wopi token %s (%s)" % (wopi_a, ex), status=400)
+                    return False

        self.rvol = self.asrv.vfs.aread[self.uname]
        self.wvol = self.asrv.vfs.awrite[self.uname]
@ -1532,8 +1574,141 @@ class HttpCli(object):
        if "rss" in self.uparam:
            return self.tx_rss()

+        if self.args.wopi:
+            if "wopi" in self.uparam:
+                return self.tx_wopi()
+
+            if self.vpath.startswith("wopi"):
+                return self.tx_wopi_api()
+
        return self.tx_browser()

+    def tx_wopi_api(self) -> bool:
+        atoken = self.uparam["access_token"]
+        session = self.conn.hsrv.wopi_files[atoken]
+        if self.do_log:
+            self.log(" `-- wopi: %r" % (session["vp"],))
+
+        zs = "wopi/files/%s" % (session["file_id"],)
+        if not self.vpath.startswith(zs):
+            return self.tx_404()
+        query = self.vpath[len(zs) :]
+
+        vfs, rem = self.asrv.vfs.get(session["vp"], self.uname, True, True)
+        vpath = vjoin(vfs.vpath, rem)
+        ap = vfs.canonical(rem)
+        if query.startswith("/contents"):
+            return self.tx_file("oh_f", ap)
+        else:
+            st = bos.stat(ap)
+            file_info = {
+                "BaseFileName": vpath.split("/")[-1],
+                "Size": st.st_size,
+                "OwnerId": self.uname,
+                "UserId": self.uname,
+                "UserFriendlyName": self.uname,
+                "UserCanWrite": True,
+                "UserCanNotWriteRelative": True,
+                "LastModifiedTime": time.strftime(
+                    "%Y-%m-%dT%H:%M:%SZ", time.gmtime(st.st_mtime)
+                ),
+            }
+            ret = json.dumps(file_info).encode("utf-8", "replace")
+            self.reply(ret, 200, "application/json; charset=utf-8")
+            return True
+
+        return self.tx_404()
+
+    def tx_wopi(self) -> bool:
+        vpath = vjoin(self.vpath, self.uparam["wopi"])
+        vfs, rem = self.asrv.vfs.get(
+            vpath, self.uname, True, True, False, self.args.wopi_wdel
+        )
+        if not bos.path.isfile(vfs.canonical(rem)):
+            return self.tx_404()
+
+        wopi_files = self.conn.hsrv.wopi_files
+        found = None
+        rm = []
+        with self.conn.hsrv.mutex:
+            now = time.time()
+            for atoken, session in wopi_files.items():
+                if session["expires"] < now:
+                    rm.append(atoken)
+                    continue
+                if session["vp"] != vpath or session["uname"] != self.uname:
+                    continue
+                if session["expires"] - now < self.args.wopi_ttl * 0.9:
+                    rm.append(atoken)
+                    continue
+                found = session
+                break
+            for zs in rm:
+                del wopi_files[zs]
+            if len(wopi_files) > 9000:  # about 6 MiB
+                raise Pebkac(500, "too many wopi sessions")
+            if not found:
+                atoken = ub64enc(os.urandom(18)).decode("ascii")  #  18 = 144b = 24c
+                file_id = ub64enc(os.urandom(15)).decode("ascii")  # 15 = 120b = 20c
+                wopi_files[atoken] = session = {
+                    "vp": vpath,
+                    "uname": self.uname,
+                    "file_id": file_id,
+                    "expires": time.time() + self.args.wopi_ttl,
+                }
+
+        xml = "?"
+        try:
+            from .dxml import parse_xml
+
+            uo_kw = {}
+            if self.args.wopi_crt:
+                import ssl
+
+                if self.args.wopi_crt == "no":
+                    ctx = ssl._create_unverified_context()
+                else:
+                    ctx = ssl.create_default_context(cafile=self.args.wopi_crt)
+                    ctx.check_hostname = not self.args.wopi_crt_icn
+
+                uo_kw["context"] = ctx
+
+            wopi_urls = dict(x.lower().split("=", 1) for x in self.args.wopi_urls or [])
+            url = wopi_urls.get(self.host.lower(), self.args.wopi_url).rstrip("/")
+            url += "/hosting/discovery"
+            buf = urlopen(url, **uo_kw).read()
+            xml = buf.decode("ascii", "replace").lower()
+            enc = self.get_xml_enc(xml)
+            xml = buf.decode(enc, "replace")
+            xroot = parse_xml(xml)
+            ext = vpath.split(".")[-1]
+            url = xroot.find(
+                ".//action[@ext='%s'][@name='edit'][@urlsrc]" % (ext,)
+            ).get("urlsrc")
+            if not url.endswith(("?", "&")):
+                url += "&" if "?" in url else "?"
+            url += "WOPISrc="
+            if self.args.wopi_api:
+                zs = self.args.wopi_api.rstrip("/")
+            else:
+                zs = ("https://" if self.is_https else "http://") + self.host
+            url += quotep(zs + "/wopi/files/" + session["file_id"])
+        except:
+            del wopi_files[atoken]  # dont reuse an atoken wopi-client doesnt like
+            self.log("reading WOPI-client response failed; %s\n%s" % (min_ex(), xml), 3)
+            raise Pebkac(500, "wopi error (see fileserver log)")
+
+        html = self.j2s(
+            "wopi",
+            title=self.uparam["wopi"],
+            url=url,
+            atoken=atoken,
+            ttl=session["expires"],
+        ).encode("utf-8", "replace")
+
+        self.reply(html, 200, "text/html; charset=utf-8")
+        return True
+
    def tx_rss(self) -> bool:
        if self.do_log:
            self.log("RSS  %s @%s" % (self.req, self.uname))
@ -2387,6 +2562,9 @@ class HttpCli(object):

            raise Pebkac(405, "POST(%r) is disabled in server config" % (ctype,))

+        if self.args.wopi and self.vpath.startswith("wopi"):
+            return self.handle_post_binary()
+
        raise Pebkac(405, "don't know how to handle POST(%r)" % (ctype,))

    def handle_smsg(self) -> bool:
@ -3156,6 +3334,9 @@ class HttpCli(object):
        except:
            raise Pebkac(400, "you must supply a content-length for binary POST")

+        if self.args.wopi and self.vpath.startswith("wopi"):
+            return self.rx_wopi(postsize)
+
        try:
            chashes = self.headers["x-up2k-hash"].split(",")
            wark = self.headers["x-up2k-wark"]
@ -3367,6 +3548,47 @@ class HttpCli(object):
        self.reply(b"thank")
        return True

+    def rx_wopi(self, postsize: int) -> bool:
+        atoken = self.uparam["access_token"]
+        session = self.conn.hsrv.wopi_files[atoken]
+        if self.do_log:
+            self.log(" `-- wopi: %r" % (session["vp"],))
+
+        zs = "wopi/files/%s/contents" % (session["file_id"],)
+        if not self.vpath.startswith(zs):
+            return self.tx_404()
+
+        vpath = self.conn.hsrv.wopi_files[self.uparam["access_token"]]["vp"]
+        vfs, rem = self.asrv.vfs.get(vpath, self.uname, False, True)
+        vpath = vjoin(vfs.vpath, rem)
+        ap = vfs.canonical(rem)
+        st = bos.stat(ap)
+
+        if "x-cool-wopi-timestamp" in self.headers:
+            zs = time.strftime("%Y-%m-%dT%H:%M:%SZ", time.gmtime(st.st_mtime))
+            if self.headers["x-cool-wopi-timestamp"] != zs:
+                self.reply(json.dumps({"COOLStatusCode": 1010}).encode("utf-8"), 409)
+                return True
+
+        buf = b""
+        for rbuf in self.get_body_reader()[0]:
+            buf += rbuf
+            if not rbuf:
+                break
+
+        if len(buf) != postsize:
+            t = "wopi post with incorrect length; expected %d, got %d"
+            raise Pebkac(400, t % (postsize, len(buf)))
+
+        with open(ap, "wb") as file:
+            file.write(buf)
+
+        st = bos.stat(ap)
+        zs = time.strftime("%Y-%m-%dT%H:%M:%SZ", time.gmtime(st.st_mtime))
+        ret = json.dumps({"LastModifiedTime": zs}).encode("utf-8", "replace")
+        self.reply(ret, 200, "application/json; charset=utf-8")
+        return True
+
    def handle_chpw(self) -> bool:
        assert self.parser  # !rm
        if self.args.usernames:
@ -3521,7 +3743,7 @@ class HttpCli(object):
    def _mkdir(self, vpath: str, dav: bool = False) -> bool:
        nullwrite = self.args.nw
        self.gctx = vpath
-        vpath = undot(vpath)
+        vpath = sanitize_vpath(undot(vpath))
        vfs, rem = self.asrv.vfs.get(vpath, self.uname, False, True)
        if "nosub" in vfs.flags:
            raise Pebkac(403, "mkdir is forbidden below this folder")
@ -3627,6 +3849,9 @@ class HttpCli(object):
                True,
            )

+        if self.args.wopi and sanitized.endswith(WOPI_NEW):
+            return self.redirect(vjoin(vfs.vpath, rem), "?wopi=" + quotep(sanitized))
+
        vpath = "{}/{}".format(self.vpath, sanitized).lstrip("/")
        self.redirect(vpath, "?edit")
        return True
@ -6856,7 +7081,8 @@ class HttpCli(object):
                nothumb = "dthumb" in dbv.flags
                if is_dir:
                    vrem = vrem.rstrip("/")
-                    if nothumb:
+                    cvs = dbv.flags["th_coversl"]
+                    if nothumb or not cvs:
                        pass
                    elif icur and vrem:
                        q = "select fn from cv where rd=? and dn=?"
@ -6873,7 +7099,7 @@ class HttpCli(object):
                        except:
                            pass
                    else:
-                        for fn in self.args.th_covers:
+                        for fn in cvs:
                            fp = os.path.join(abspath, fn)
                            try:
                                st = bos.stat(fp)
@ -7219,20 +7445,18 @@ class HttpCli(object):
        dirs = []
        files = []
        ptn_hr = RE_HR
-        use_abs_url = is_opds or (
-            vpath and not is_ls and not is_js and not self.trailing_slash
-        )
+
+        base = ""
+        if is_opds or (vpath and not (is_ls or is_js or self.trailing_slash)):
+            if is_opds:
+                base = self.args.SRS
+                if vpath:
+                    base += vpath + "/"
+            else:
+                base = "/" + vpath + "/"
+
        for fn in ls_names:
-            base = ""
-            href = fn
-            if use_abs_url:
-                if is_opds:
-                    base = self.args.SRS
-                    if vpath:
-                        base += vpath + "/"
-                else:
-                    base = "/" + vpath + "/"
-                href = base + fn
+            href = base + fn

            if fn in vfs_virt:
                fspath = vfs_virt[fn].realpath
@ -7402,6 +7626,26 @@ class HttpCli(object):
                        (fe["sz"], fe["tags"][".files"]) = hit
                    except:
                        pass  # 404 or mojibake
+                if vfs_virt:
+                    q = "select sz, nf from ds where rd='' limit 1"
+                    try:
+                        for fe in [x for x in dirs if x["name"] in vfs_virt]:
+                            if ".files" not in fe["tags"]:
+                                fe["tags"][".files"] = 0
+                            vols = [vn.nodes[fe["name"]]]
+                            while vols:
+                                vn2 = vols.pop()
+                                if self.uname not in vn2.axs.uread:
+                                    continue
+                                vols += list(vn2.nodes.values())
+                                if vn2.dbv not in (vn2, None):
+                                    continue
+                                hit = idx.get_cur(vn2).execute(q).fetchone()
+                                if hit:
+                                    fe["sz"] += hit[0]
+                                    fe["tags"][".files"] += hit[1]
+                    except:
+                        pass

            taglist = [k for k in lmte if k in tagset]
        else:
@ -7636,7 +7880,7 @@ class HttpCli(object):
                        self.conn.hsrv.j2[tpl] = j2env.get_template(tname)
            thumb = ""
            is_pic = is_vid = is_au = False
-            for fn in self.args.th_coversd:
+            for fn in vn.flags["th_coversd"]:
                if fn in lnames:
                    thumb = lnames[fn]
                    break
--- a/copyparty/httpconn.py
+++ b/copyparty/httpconn.py
@ -1,5 +1,5 @@
 # coding: utf-8
-from __future__ import print_function, unicode_literals
+from __future__ import division, print_function, unicode_literals

 import argparse  # typechk
 import os
--- a/copyparty/httpsrv.py
+++ b/copyparty/httpsrv.py
@ -1,5 +1,5 @@
 # coding: utf-8
-from __future__ import print_function, unicode_literals
+from __future__ import division, print_function, unicode_literals

 import hashlib
 import math
@ -180,6 +180,8 @@ class HttpSrv(object):
        self.u2idx_free: dict[str, U2idx] = {}
        self.u2idx_n = 0

+        self.wopi_files: dict[str, dict[str, str]] = {}
+
        assert jinja2  # type: ignore  # !rm
        env = jinja2.Environment()
        env.loader = jinja2.FunctionLoader(lambda f: load_jinja2_resource(self.E, f))
@ -195,6 +197,7 @@ class HttpSrv(object):
            "shares",
            "splash",
            "svcs",
+            "wopi",
        ]
        self.j2 = {x: env.get_template(x + ".html") for x in jn}
        self.j2["opds"] = env.get_template("opds.xml")
@ -315,7 +318,7 @@ class HttpSrv(object):

        self.srvs.append(sck)
        self.bound.add((ip, port))
-        self.nclimax = math.ceil(self.args.nc * 1.0 / nlisteners)
+        self.nclimax = -int(-self.args.nc // nlisteners)
        Daemon(
            self.thr_listen,
            "httpsrv-n{}-listen-{}-{}".format(self.nid or "0", ip, port),
--- a/copyparty/ico.py
+++ b/copyparty/ico.py
@ -1,5 +1,5 @@
 # coding: utf-8
-from __future__ import print_function, unicode_literals
+from __future__ import division, print_function, unicode_literals

 import argparse  # typechk
 import colorsys
--- a/copyparty/mdns.py
+++ b/copyparty/mdns.py
@ -1,5 +1,5 @@
 # coding: utf-8
-from __future__ import print_function, unicode_literals
+from __future__ import division, print_function, unicode_literals

 import errno
 import os
--- a/copyparty/metrics.py
+++ b/copyparty/metrics.py
@ -1,5 +1,5 @@
 # coding: utf-8
-from __future__ import print_function, unicode_literals
+from __future__ import division, print_function, unicode_literals

 import json
 import time
--- a/copyparty/mtag.py
+++ b/copyparty/mtag.py
@ -1,5 +1,5 @@
 # coding: utf-8
-from __future__ import print_function, unicode_literals
+from __future__ import division, print_function, unicode_literals

 import argparse
 import json
@ -17,7 +17,9 @@ from .util import (
    FFMPEG_URL,
    LOG,
    REKOBO_LKEY,
+    SCWD,
    VF_CAREFUL,
+    absreal,
    expand_osenv_c,
    fsenc,
    gzip,
@ -47,10 +49,10 @@ except:
    HAVE_MUTAGEN = False


-def have_ff(name: str) -> bytes:
+def have_ff(name: str) -> list[bytes]:
    uname = name.upper()
    if os.environ.get("PRTY_NO_" + uname):
-        return b""
+        return []

    ebin = os.environ.get("PRTY_%s_BIN" % (uname,))
    try:
@ -66,11 +68,12 @@ def have_ff(name: str) -> bytes:
        bcmd = scmd.encode("utf-8")
        try:
            sp.Popen([bcmd, b"-version"], stdout=sp.PIPE, stderr=sp.PIPE).communicate()
-            return bcmd
+            return [bcmd]
        except:
-            return b""
+            return []
    else:
-        return (shutil.which(scmd) or "").encode("utf-8")
+        ret = shutil.which(scmd)
+        return [absreal(ret).encode("utf-8")] if ret else []


 HAVE_FFMPEG = have_ff("ffmpeg")
@ -191,6 +194,12 @@ def au_unpk(
            log(t)
            fi = zf.open(using)

+        elif pk == "kra" or pk == "ora":
+            import zipfile
+
+            zf = zipfile.ZipFile(abspath, "r")
+            fi = zf.open("mergedimage.png")
+
        elif pk == "epub":
            fi = get_cover_from_epub(log, abspath)
            assert fi  # !rm
@ -247,14 +256,14 @@ def ffprobe(
 ) -> tuple[dict[str, tuple[int, Any]], dict[str, list[Any]], list[Any], dict[str, Any]]:
    # ffprobe -hide_banner -show_streams -show_format --
    bap = fsenc(abspath)
-    cmd = bwrap(HAVE_FFPROBE, bap, b"") + [
+    cmd = bwrap(HAVE_FFPROBE[0], bap, b"") + [
        b"-hide_banner",
        b"-show_streams",
        b"-show_format",
        b"--",
        bap,
    ]
-    rc, so, se = runcmd(cmd, timeout=timeout, nice=True, oom=200)
+    rc, so, se = runcmd(cmd, cwd=SCWD, timeout=timeout, nice=True, oom=200)
    if rc and TH_BWRAP:
        bwrap_fail(se)
    retchk(rc, cmd, se)
--- a/copyparty/multicast.py
+++ b/copyparty/multicast.py
@ -1,5 +1,5 @@
 # coding: utf-8
-from __future__ import print_function, unicode_literals
+from __future__ import division, print_function, unicode_literals

 import socket
 import time
--- a/copyparty/pwhash.py
+++ b/copyparty/pwhash.py
@ -1,5 +1,5 @@
 # coding: utf-8
-from __future__ import print_function, unicode_literals
+from __future__ import division, print_function, unicode_literals

 import argparse
 import base64
--- a/copyparty/qrkode.py
+++ b/copyparty/qrkode.py
@ -1,5 +1,5 @@
 # coding: utf-8
-from __future__ import print_function, unicode_literals
+from __future__ import division, print_function, unicode_literals

 import os

--- a/copyparty/sftpd.py
+++ b/copyparty/sftpd.py
@ -1,5 +1,5 @@
 # coding: utf-8
-from __future__ import print_function, unicode_literals
+from __future__ import division, print_function, unicode_literals

 import errno
 import hashlib
--- a/copyparty/ssdp.py
+++ b/copyparty/ssdp.py
@ -1,5 +1,5 @@
 # coding: utf-8
-from __future__ import print_function, unicode_literals
+from __future__ import division, print_function, unicode_literals

 import errno
 import re
--- a/copyparty/star.py
+++ b/copyparty/star.py
@ -1,5 +1,5 @@
 # coding: utf-8
-from __future__ import print_function, unicode_literals
+from __future__ import division, print_function, unicode_literals

 import re
 import stat
--- a/copyparty/sutil.py
+++ b/copyparty/sutil.py
@ -1,5 +1,5 @@
 # coding: utf-8
-from __future__ import print_function, unicode_literals
+from __future__ import division, print_function, unicode_literals

 import os
 import tempfile
--- a/copyparty/svchub.py
+++ b/copyparty/svchub.py
@ -1,5 +1,5 @@
 # coding: utf-8
-from __future__ import print_function, unicode_literals
+from __future__ import division, print_function, unicode_literals

 import argparse
 import atexit
@ -81,6 +81,7 @@ from .util import (
    alltrace,
    build_netmap,
    expat_ver,
+    fsenc,
    gzip,
    html_escape,
    load_ipr,
@ -233,10 +234,14 @@ class SvcHub(object):

        self.lo1 = self.lo2 = ""
        if args.lo:
+            do_xz = args.lo.replace("%R", "").lower().endswith(".xz")
            if "%R" not in args.lo:
                args.lo += "%R"
            if args.rlo in ("", "no"):
                args.rlo = ""
+            if do_xz and not args.rlo:
+                args.rlo = ".1"
+            if args.rlo in ("", "del", "over"):
                args.lo = args.lo.replace("%R", "")
            try:
                self.lo1, self.lo2 = args.lo.split("%R")
@ -396,6 +401,9 @@ class SvcHub(object):
        self.asrv = AuthSrv(self.args, self.log, dargs=self.dargs)
        ramdisk_chk(self.asrv)

+        if ANYWIN and not self.args.unsafe_tools:
+            self._check_toolpaths()
+
        if args.cgen:
            self.asrv.cgen()

@ -1021,6 +1029,18 @@ class SvcHub(object):
        if zb:
            Daemon(self.s6_notify, "s6-notify", (zb,))

+    def _check_toolpaths(self) -> None:
+        for vol in self.asrv.vfs.all_vols.values():
+            if not vol.realpath or not vol.axs.uwrite:
+                continue
+            ap_vol = (vol.realpath + os.sep).encode("utf-8")
+            for zsl in (HAVE_FFMPEG, HAVE_FFPROBE, HAVE_DCRAW):
+                if zsl and zsl[0].startswith(ap_vol):
+                    zs = zsl[0].decode("utf-8", "replace")
+                    t = "will not use [%s] because it is inside a writable volume [/%s] => [%s] and --unsafe-tools is not enabled"
+                    self.log("root", t % (zs, vol.vpath, vol.realpath), 3)
+                    del zsl[0]
+
    def _feature_test(self) -> None:
        fok = []
        fng = []
@ -1029,8 +1049,8 @@ class SvcHub(object):
        # fmt: off
        to_check = [
            (HAVE_SQLITE3, "sqlite", "sessions and file/media indexing"),
-            (HAVE_PIL, "pillow", "image thumbnails (plenty fast)"),
-            (HAVE_VIPS, "vips", "image thumbnails (faster, eats more ram)"),
+            (HAVE_PIL, "pillow", "image thumbnails (good and fast)"),
+            (HAVE_VIPS, "vips", "image thumbnails (eats ram; will prefer pillow)"),
            (H_PIL_WEBP, "pillow-webp", "create thumbnails as webp files"),
            (HAVE_FFMPEG, "ffmpeg", t_ff + ", good-but-slow image thumbnails"),
            (HAVE_FFPROBE, "ffprobe", t_ff + ", read audio/media tags"),
@ -1107,14 +1127,19 @@ class SvcHub(object):
                t = "not listening on any ip-addresses (only unix-sockets and/or FDs); cannot enable zeroconf/mdns/ssdp as requested"
                self.log("root", t, 3)

-        if not self.args.no_dav:
+        if self.args.wopi or not self.args.no_dav:
            from .dxml import DXML_OK

            if not DXML_OK:
-                if not self.args.no_dav:
-                    self.args.no_dav = True
-                    t = "WARNING:\nDisabling WebDAV support because dxml selftest failed. Please report this bug;\n%s\n...and include the following information in the bug-report:\n%s | expat %s\n"
-                    self.log("root", t % (URL_BUG, VERSIONS, expat_ver()), 1)
+                self.args.wopi = False
+                self.args.no_dav = True
+                t = "WARNING:\nDisabling WebDAV and WOPI support because dxml selftest failed. Please report this bug;\n%s\n...and include the following information in the bug-report:\n%s | expat %s\n"
+                self.log("root", t % (URL_BUG, VERSIONS, expat_ver()), 1)
+
+        if self.args.wopi and self.args.j != 1:
+            self.args.wopi = False
+            t = "WARNING: Disabling --wopi because -j is not 1 (the default and recommended -j value)"
+            self.log("root", t, 1)

        if (
            not E.scfg
@ -1183,14 +1208,6 @@ class SvcHub(object):
        if al.rsp_jtr:
            al.rsp_slp = 0.000001

-        zsl = al.th_covers.split(",")
-        zsl = [x.strip() for x in zsl]
-        zsl = [x for x in zsl if x]
-        al.th_covers = zsl
-        al.th_coversd = zsl + ["." + x for x in zsl]
-        al.th_covers_set = set(al.th_covers)
-        al.th_coversd_set = set(al.th_coversd)
-
        zs = al.use_bwrap.strip().lower()
        if zs == "a":
            if not HAVE_BWRAP:
@ -1446,7 +1463,7 @@ class SvcHub(object):
    def _setup_logfile(self) -> None:
        base_fn = fn = self._logname()
        sel_fn = fn + self.lo2
-        do_xz = sel_fn.lower().endswith(".xz")
+        do_xz = sel_fn.replace("%R", "").lower().endswith(".xz")
        if "%R" in self.args.lo:
            # yup this is a race; if started sufficiently concurrently, two
            # copyparties can grab the same logfile (considered and ignored)
@ -1462,18 +1479,31 @@ class SvcHub(object):
        except:
            pass

+        if self.args.rlo in ("del", "over"):
+            tmode = "wt"
+            bmode = "w"
+        else:
+            tmode = "at"
+            bmode = "a"
+
+        if self.args.rlo == "del":
+            try:
+                bos.unlink(fn)
+            except:
+                pass
+
        try:
            if do_xz:
                import lzma

-                lh = lzma.open(fn, "wt", encoding="utf-8", errors="replace", preset=0)
+                lh = lzma.open(fn, tmode, encoding="utf-8", errors="replace", preset=0)
                self.args.no_logflush = True
            else:
-                lh = open(fn, "wt", encoding="utf-8", errors="replace")
+                lh = open(fn, tmode, encoding="utf-8", errors="replace")
        except:
            import codecs

-            lh = codecs.open(fn, "w", encoding="utf-8", errors="replace")
+            lh = codecs.open(fn, bmode, encoding="utf-8", errors="replace")

        if getattr(self.args, "free_umask", False):
            os.fchmod(lh.fileno(), 0o644)
@ -1488,6 +1518,8 @@ class SvcHub(object):
        printed = "".join(lprinted) + msg
        t = "t0: {:.3f}\nargv: {}\n\n{}"
        lh.write(t.format(self.E.t0, " ".join(argv), printed))
+        if not self.args.no_logflush:
+            lh.flush()
        self.logf = lh
        self.logf_base_fn = base_fn
        print(msg, end="")
--- a/copyparty/szip.py
+++ b/copyparty/szip.py
@ -1,5 +1,5 @@
 # coding: utf-8
-from __future__ import print_function, unicode_literals
+from __future__ import division, print_function, unicode_literals

 import calendar
 import stat
--- a/copyparty/tcpsrv.py
+++ b/copyparty/tcpsrv.py
@ -1,5 +1,5 @@
 # coding: utf-8
-from __future__ import print_function, unicode_literals
+from __future__ import division, print_function, unicode_literals

 import os
 import re
--- a/copyparty/tftpd.py
+++ b/copyparty/tftpd.py
@ -1,5 +1,5 @@
 # coding: utf-8
-from __future__ import print_function, unicode_literals
+from __future__ import division, print_function, unicode_literals

 try:
    from types import SimpleNamespace
--- a/copyparty/th_cli.py
+++ b/copyparty/th_cli.py
@ -1,5 +1,5 @@
 # coding: utf-8
-from __future__ import print_function, unicode_literals
+from __future__ import division, print_function, unicode_literals

 import errno
 import os
--- a/copyparty/th_srv.py
+++ b/copyparty/th_srv.py
@ -1,5 +1,5 @@
 # coding: utf-8
-from __future__ import print_function, unicode_literals
+from __future__ import division, print_function, unicode_literals

 import hashlib
 import io
@ -31,6 +31,7 @@ from .mtag import (
 from .util import BytesIO  # type: ignore
 from .util import (
    FFMPEG_URL,
+    SCWD,
    VF_CAREFUL,
    Cooldown,
    Daemon,
@ -774,7 +775,7 @@ class ThumbSrv(object):
        self.wait4ram(0.6, tpath)
        bap = fsenc(abspath)
        # fmt: off
-        cmd = bwrap(HAVE_DCRAW, bap, b"") + [
+        cmd = bwrap(HAVE_DCRAW[0], bap, b"") + [
            b"-h",  # halfsize
            b"-o", b"1",  # srgb
            b"-s", b"0",  # first frame
@ -782,7 +783,7 @@ class ThumbSrv(object):
            bap,
        ]
        # fmt: on
-        p = sp.Popen(cmd, stdout=sp.PIPE)
+        p = sp.Popen(cmd, stdout=sp.PIPE, cwd=SCWD)
        try:
            if HAVE_PIL:
                self.conv_image_pil(Image.open(p.stdout), tpath, fmt, vn)
@ -833,7 +834,7 @@ class ThumbSrv(object):

    def conv_ffmpeg(self, abspath: str, tpath: str, fmt: str, vn: VFS) -> None:
        self.wait4ram(0.2, tpath)
-        ret, _, _, _ = ffprobe(abspath, int(vn.flags["convt"] / 2))
+        ret, raw, strms, ctnr = ffprobe(abspath, int(vn.flags["convt"] / 2))
        if not ret:
            return

@ -841,6 +842,13 @@ class ThumbSrv(object):
            # audio in a video trenchcoat
            return self.conv_spec(abspath, tpath, fmt, vn)

+        for strm in strms:
+            if (
+                strm.get("codec_type") == "video"
+                and strm.get("DISPOSITION:attached_pic") == "1"
+            ):
+                return self.conv_emb_cv(abspath, tpath, fmt, vn, strm)
+
        ext = abspath.rsplit(".")[-1].lower()
        if ext in ["h264", "h265"] or ext in self.fmt_ffi:
            seek: list[bytes] = []
@ -870,7 +878,7 @@ class ThumbSrv(object):
        bap_in = fsenc(abspath)
        bap_out = fsenc(tpath)
        # fmt: off
-        cmd = bwrap(HAVE_FFMPEG, bap_in, bap_out) + [
+        cmd = bwrap(HAVE_FFMPEG[0], bap_in, bap_out) + [
            b"-nostdin",
            b"-v", b"error",
            b"-hide_banner"
@ -911,7 +919,7 @@ class ThumbSrv(object):

    def _run_ff(self, cmd: list[bytes], vn: VFS, kto: str, oom: int = 400) -> None:
        # self.log((b" ".join(cmd)).decode("utf-8"))
-        ret, _, serr = runcmd(cmd, timeout=vn.flags[kto], nice=True, oom=oom)
+        ret, _, serr = runcmd(cmd, cwd=SCWD, timeout=vn.flags[kto], nice=True, oom=oom)
        if not ret:
            return

@ -1013,7 +1021,7 @@ class ThumbSrv(object):
        bap_out = fsenc(tpath)

        # fmt: off
-        cmd = bwrap(HAVE_FFMPEG, bap_in, bap_out) + [
+        cmd = bwrap(HAVE_FFMPEG[0], bap_in, bap_out) + [
            b"-nostdin",
            b"-v", b"error",
            b"-hide_banner",
@ -1094,7 +1102,7 @@ class ThumbSrv(object):
            bap_out = fsenc(infile)

            # fmt: off
-            cmd = bwrap(HAVE_FFMPEG, bap_in, bap_out) + [
+            cmd = bwrap(HAVE_FFMPEG[0], bap_in, bap_out) + [
                b"-nostdin",
                b"-v", b"error",
                b"-hide_banner",
@ -1128,7 +1136,7 @@ class ThumbSrv(object):
        bap_out = fsenc(tpath)

        # fmt: off
-        cmd = bwrap(HAVE_FFMPEG, bap_in, bap_out) + [
+        cmd = bwrap(HAVE_FFMPEG[0], bap_in, bap_out) + [
            b"-nostdin",
            b"-v", b"error",
            b"-hide_banner",
@ -1166,7 +1174,7 @@ class ThumbSrv(object):
        # to not support opus then it's probably also super picky

        # fmt: off
-        cmd = bwrap(HAVE_FFMPEG, bap_in, bap_out) + [
+        cmd = bwrap(HAVE_FFMPEG[0], bap_in, bap_out) + [
            b"-nostdin",
            b"-v", b"error",
            b"-hide_banner",
@ -1197,7 +1205,7 @@ class ThumbSrv(object):
        bap_out = fsenc(tpath)

        # fmt: off
-        cmd = bwrap(HAVE_FFMPEG, bap_in, bap_out) + [
+        cmd = bwrap(HAVE_FFMPEG[0], bap_in, bap_out) + [
            b"-nostdin",
            b"-v", b"error",
            b"-hide_banner",
@ -1234,7 +1242,7 @@ class ThumbSrv(object):
        bap_out = fsenc(tpath)

        # fmt: off
-        cmd = bwrap(HAVE_FFMPEG, bap_in, bap_out) + [
+        cmd = bwrap(HAVE_FFMPEG[0], bap_in, bap_out) + [
            b"-nostdin",
            b"-v", b"error",
            b"-hide_banner",
@ -1297,7 +1305,7 @@ class ThumbSrv(object):
        bap_out = fsenc(tpath)

        # fmt: off
-        cmd = bwrap(HAVE_FFMPEG, bap_in, bap_out) + [
+        cmd = bwrap(HAVE_FFMPEG[0], bap_in, bap_out) + [
            b"-nostdin",
            b"-v", b"error",
            b"-hide_banner",
@ -1340,7 +1348,7 @@ class ThumbSrv(object):
        bap_out = fsenc(tmp_opus)

        # fmt: off
-        cmd = bwrap(HAVE_FFMPEG, bap_in, bap_out) + [
+        cmd = bwrap(HAVE_FFMPEG[0], bap_in, bap_out) + [
            b"-nostdin",
            b"-v", b"error",
            b"-hide_banner",
@ -1367,7 +1375,7 @@ class ThumbSrv(object):
            bap_in = fsenc(abspath)
            bap_out = fsenc(tpath)
            # fmt: off
-            cmd = bwrap(HAVE_FFMPEG, bap_in, bap_out) + [
+            cmd = bwrap(HAVE_FFMPEG[0], bap_in, bap_out) + [
                b"-nostdin",
                b"-v", b"error",
                b"-hide_banner",
@ -1389,7 +1397,7 @@ class ThumbSrv(object):
            bap_in = fsenc(tmp_opus)
            bap_out = fsenc(tpath)
            # fmt: off
-            cmd = bwrap(HAVE_FFMPEG, bap_in, bap_out) + [
+            cmd = bwrap(HAVE_FFMPEG[0], bap_in, bap_out) + [
                b"-nostdin",
                b"-v", b"error",
                b"-hide_banner",
--- a/copyparty/u2idx.py
+++ b/copyparty/u2idx.py
@ -1,5 +1,5 @@
 # coding: utf-8
-from __future__ import print_function, unicode_literals
+from __future__ import division, print_function, unicode_literals

 import calendar
 import os
@ -28,6 +28,14 @@ from .util import (
 if HAVE_SQLITE3:
    import sqlite3

+try:
+    if os.environ.get("PRTY_NO_UNIDATA"):
+        raise Exception()
+
+    import unicodedata
+except:
+    pass
+
 try:
    from pathlib import Path
 except:
@ -43,6 +51,14 @@ if PY2:
    range = xrange  # type: ignore


+def norm_icase(txt: str) -> str:
+    return txt.casefold() if txt else txt
+
+
+def norm_nfkc(txt: str) -> str:
+    return unicodedata.normalize("NFKC", txt).casefold() if txt else txt
+
+
 class U2idx(object):
    def __init__(self, hsrv: "HttpSrv") -> None:
        self.log_func = hsrv.log
@ -55,6 +71,10 @@ class U2idx(object):
            return

        if self.args.srch_icase:
+            if self.args.srch_nfkc:
+                self.normfun = norm_nfkc
+            else:
+                self.normfun = norm_icase
            self._open_db = self._open_db_icase
        else:
            self._open_db = self._open_db_std
@ -82,7 +102,7 @@ class U2idx(object):

    def _open_db_icase(self, *args, **kwargs):
        db = self._open_db_std(*args, **kwargs)
-        db.create_function("casefold", 1, lambda x: x.casefold() if x else x)
+        db.create_function("casefold", 1, self.normfun)
        return db

    def shutdown(self) -> None:
@ -323,7 +343,7 @@ class U2idx(object):

            if icase and "casefold(" in q:
                try:
-                    v = unicode(v).casefold()
+                    v = self.normfun(unicode(v))
                except:
                    v = unicode(v).lower()

--- a/copyparty/up2k.py
+++ b/copyparty/up2k.py
@ -1,5 +1,5 @@
 # coding: utf-8
-from __future__ import print_function, unicode_literals
+from __future__ import division, print_function, unicode_literals

 import errno
 import hashlib
@ -74,6 +74,7 @@ from .util import (
    vsplit,
    w8b64dec,
    w8b64enc,
+    winsparse,
    wunlink,
 )

@ -1159,7 +1160,7 @@ class Up2k(object):
        ft = "\033[0;32m{}{:.0}"
        ff = "\033[0;35m{}{:.0}"
        fv = "\033[0;36m{}:\033[90m{}"
-        zs = "bcasechk du_iwho emb_all emb_lgs emb_mds ext_th_d html_head html_head_d html_head_s ls_q_m put_name2 mv_re_r mv_re_t rm_re_r rm_re_t oh_f oh_g rw_edit_set srch_re_dots srch_re_nodot zipmax zipmaxn_v zipmaxs_v"
+        zs = "bcasechk du_iwho emb_all emb_lgs emb_mds ext_th_d html_head html_head_d html_head_s ls_q_m put_name2 mv_re_r mv_re_t rm_re_r rm_re_t oh_f oh_g rw_edit_set srch_re_dots srch_re_nodot th_coversd th_coversl th_covers_set th_coversd_set zipmax zipmaxn_v zipmaxs_v"
        fx = set(zs.split())
        fd = vf_bmap()
        fd.update(vf_cmap())
@ -1431,6 +1432,8 @@ class Up2k(object):
                    rtop,
                    rei,
                    reh,
+                    vol.flags["th_coversd"],
+                    vol.flags["th_coversd_set"],
                    n4g,
                    ffat,
                    [],
@ -1508,6 +1511,8 @@ class Up2k(object):
        rcdir: str,
        rei: Optional[Pattern[str]],
        reh: Optional[Pattern[str]],
+        th_cvd: list[str],
+        th_cvds: set[str],
        n4g: bool,
        ffat: bool,
        seen: list[str],
@ -1533,8 +1538,6 @@ class Up2k(object):
        cv = vcv = acv = ""
        e_d = {}

-        th_cvd = self.args.th_coversd
-        th_cvds = self.args.th_coversd_set
        scan_pr_s = self.args.scan_pr_s

        assert self.pp and self.mem_cur  # !rm
@ -1601,6 +1604,8 @@ class Up2k(object):
                        rap,
                        rei,
                        reh,
+                        th_cvd,
+                        th_cvds,
                        n4g,
                        fat32,
                        seen,
@ -1631,7 +1636,7 @@ class Up2k(object):

                rsz += sz
                files.append((sz, lmod, iname))
-                if sz:
+                if sz and th_cvd:
                    liname = iname.lower()
                    ext = liname.rsplit(".", 1)[-1]
                    if (
@ -4117,31 +4122,7 @@ class Up2k(object):
                with self.rescan_cond:
                    self.rescan_cond.notify_all()

-        if rd and sz and fn.lower() in self.args.th_coversd_set:
-            # wasteful; db_add will re-index actual covers
-            # but that won't catch existing files
-            crd, cdn = rd.rsplit("/", 1) if "/" in rd else ("", rd)
-            try:
-                q = "select fn from cv where rd=? and dn=?"
-                db_cv = db.execute(q, (crd, cdn)).fetchone()[0]
-                db_lcv = db_cv.lower()
-                if db_lcv in self.args.th_coversd_set:
-                    idx_db = self.args.th_coversd.index(db_lcv)
-                    idx_fn = self.args.th_coversd.index(fn.lower())
-                    add_cv = idx_fn < idx_db
-                else:
-                    add_cv = True
-            except:
-                add_cv = True
-
-            if add_cv:
-                try:
-                    db.execute("delete from cv where rd=? and dn=?", (crd, cdn))
-                    db.execute("insert into cv values (?,?,?)", (crd, cdn, fn))
-                except:
-                    pass
-
-        if "nodirsz" not in vflags:
+        if vflags and "nodirsz" not in vflags:
            try:
                q = "update ds set nf=nf+1, sz=sz+? where rd=?"
                q2 = "insert into ds values(?,?,1)"
@ -4754,7 +4735,7 @@ class Up2k(object):
                fsize,
                ip,
                time.time(),
-                None,
+                [dabs],
            )
            t = hr.get("rejectmsg") or ""
            if t or hr.get("rc") != 0:
@ -4797,7 +4778,7 @@ class Up2k(object):
                    fsize,
                    ip,
                    time.time(),
-                    None,
+                    [sabs],
                )

            return "k"
@ -4927,7 +4908,7 @@ class Up2k(object):
                fsize,
                ip,
                time.time(),
-                None,
+                [sabs],
            )

        return "k"
@ -5335,9 +5316,12 @@ class Up2k(object):
                and self.args.sparse * 1024 * 1024 <= sz
            ):
                try:
-                    sp.check_call(["fsutil", "sparse", "setflag", abspath])
-                except:
-                    self.log("could not sparse %r" % (abspath,), 3)
+                    winsparse(f)
+                    # some kernels/etc are buggy; force sync:
+                    f.close()
+                    f = open(abspath, "rb+")
+                except Exception as ex:
+                    self.log("could not sparse %r: %s" % (abspath, ex), 3)
                    relabel = True
                    sprs = False

@ -5724,7 +5708,7 @@ def up2k_chunksize(filesize: int) -> int:
    stepsize = 512 * 1024
    while True:
        for mul in [1, 2]:
-            nchunks = math.ceil(filesize * 1.0 / chunksize)
+            nchunks = -int(-filesize // chunksize)
            if nchunks <= 256 or (chunksize >= 32 * 1024 * 1024 and nchunks <= 4096):
                return chunksize

--- a/copyparty/util.py
+++ b/copyparty/util.py
@ -1,5 +1,5 @@
 # coding: utf-8
-from __future__ import print_function, unicode_literals
+from __future__ import division, print_function, unicode_literals

 import argparse
 import base64
@ -429,6 +429,7 @@ IMPLICATIONS = [
    ["e2vu", "e2v"],
    ["e2vp", "e2v"],
    ["e2v", "e2d"],
+    ["srch_nfkc", "srch_icase"],
    ["hardlink_only", "hardlink"],
    ["hardlink", "dedup"],
    ["tftpvv", "tftpv"],
@ -677,6 +678,12 @@ except:
    HAVE_BWRAP = ""


+if ANYWIN:
+    SCWD = os.environ["systemroot"]
+else:
+    SCWD = None
+
+
 def py_desc() -> str:
    interp = platform.python_implementation()
    py_ver = ".".join([str(x) for x in sys.version_info])
@ -1354,7 +1361,7 @@ class MTHash(object):
            self.csz = chunksz

            chunks: dict[int, tuple[str, int, int]] = {}
-            nchunks = int(math.ceil(fsz / chunksz))
+            nchunks = -int(-fsz // chunksz)
            for nch in range(nchunks):
                self.work_q.put(nch)

@ -2143,7 +2150,8 @@ class MultipartParser(object):
        boundary = get_boundary(self.headers)
        if boundary.startswith('"') and boundary.endswith('"'):
            boundary = boundary[1:-1]  # dillo uses quotes
-        self.log("boundary=%r" % (boundary,))
+        if len(boundary) > 72:  # rfc-2046 <=70
+            raise Pebkac(400, "boundary 2big: %d" % (len(boundary),))

        # spec says there might be junk before the first boundary,
        # can't have the leading \r\n if that's not the case
@ -2947,6 +2955,25 @@ def trystat_shutil_copy2(log: "NamedLogger", src: bytes, dst: bytes) -> bytes:
        raise


+def trystat_shutil_move(log: "NamedLogger", src: bytes, dst: bytes) -> bytes:
+    try:
+        return shutil.move(src, dst)
+    except:
+        # ignore failed mtime on linux+ntfs; for example:
+        # shutil.py:437 <copy2>: copystat(src, dst, follow_symlinks=follow_symlinks)
+        # shutil.py:376 <copystat>: lookup("utime")(dst, ns=(st.st_atime_ns, st.st_mtime_ns),
+        # [PermissionError] [Errno 1] Operation not permitted, '/windows/_videos'
+        _, _, tb = sys.exc_info()
+        for _, _, fun, _ in traceback.extract_tb(tb):
+            if fun == "copystat":
+                if log:
+                    t = "warning: failed to retain some file attributes (timestamp and/or permissions) during move from %r to %r:\n%s"
+                    log(t % (src, dst, min_ex()), 3)
+                os.unlink(src)
+                return dst  # close enough
+        raise
+
+
 def _fs_mvrm(
    log: "NamedLogger", src: str, dst: str, atomic: bool, flags: dict[str, Any]
 ) -> bool:
@ -2998,7 +3025,9 @@ def _fs_mvrm(
            if not attempt and ex.errno == errno.EXDEV:
                t = "using copy+delete (%s)\n  %s\n  %s"
                log(t % (ex.strerror, src, dst))
-                osfun = shutil.move
+                if osfun in (os.replace, os.rename):
+                    args.insert(0, log)
+                osfun = trystat_shutil_move
                continue
            if now - t0 > maxtime or attempt == 90209:
                raise
@ -3035,7 +3064,7 @@ def atomic_move(log: "NamedLogger", src: str, dst: str, flags: dict[str, Any]) -
                os.unlink(bdst)
            except:
                pass
-            shutil.move(bsrc, bdst)  # type: ignore
+            trystat_shutil_move(log, bsrc, bdst)  # type: ignore


 def wunlink(log: "NamedLogger", abspath: str, flags: dict[str, Any]) -> bool:
@ -4032,7 +4061,7 @@ def runihook(

    t0 = time.time()
    if fork:
-        Daemon(runcmd, cmd, bcmd, ka=sp_ka)
+        Daemon(runcmd, cmd, [bcmd], ka=sp_ka)
    else:
        rc, v, err = runcmd(bcmd, **sp_ka)  # type: ignore
        if chk and rc:
@ -4198,6 +4227,10 @@ def _runhook(
            if src in ("xm", "xban"):
                ja["txt"] = txt[0]
                ja["body"] = txt[1]
+            elif src == "xbr":
+                ja["ap_to"] = txt[0]
+            elif src in ("xar.ln", "xar.mv"):
+                ja["ap_from"] = txt[0]
            else:
                ja["wark"] = txt[0]  # acshually the dwark but less confusing
        if imp:
@ -4206,7 +4239,7 @@ def _runhook(
            return mod.main(ja)
        arg = json.dumps(ja)
    else:
-        arg = txt[0] if txt else ap
+        arg = txt[0] if txt and src in ("xm", "xban") else ap

    if acmd[0].startswith("zmq:"):
        zi, zs = _zmq_hook(log, verbose, src, acmd[0][4:].lower(), arg, wait, sp_ka)
@ -4501,6 +4534,18 @@ def hidedir(dp) -> None:
            pass


+def winsparse(f: typing.BinaryIO) -> None:
+    assert ctypes  # !rm
+    assert wk32  # !rm
+    import msvcrt
+
+    fh = msvcrt.get_osfhandle(f.fileno())
+    if not wk32.DeviceIoControl(
+        fh, 0x900C4, None, 0, None, 0, ctypes.byref(ctypes.c_ulong()), None
+    ):
+        raise ctypes.WinError(ctypes.get_last_error())
+
+
 _flocks = {}


--- a/copyparty/web/browser.html
+++ b/copyparty/web/browser.html
@ -121,6 +121,8 @@

 	<h2 id="wfp"><a href="{{ r }}/?h" id="goh">control-panel</a></h2>

+	<p id="js_bork">Looks like javascript is broken; see "csp nonce" section in readme</p>
+
 	<a href="#" id="repl">π</a>

 </div>
--- a/copyparty/web/browser.js
+++ b/copyparty/web/browser.js
@ -46,6 +46,7 @@ if (1)
 				["ctrl-V", "paste (move/copy) here"],
 				["Y", "download selected"],
 				["F2", "rename selected"],
+				["F4", "update/refresh"],

 				"file-list-sel",
 				["space", "toggle file selection"],
@ -1248,6 +1249,9 @@ var img_re = APPLE ?
 	/\.(a?png|avif|bmp|gif|hei[cf]s?|jpe?g|jfif|svg|webp|webm|mkv|mp4|m4v|mov)(\?|$)/i :
 	/\.(a?png|avif|bmp|gif|jpe?g|jfif|svg|webp|webm|mkv|mp4|m4v|mov)(\?|$)/i;

+var wopi_set = !window.have_wopi ? null :
+	new Set('odt fodt ott doc docx dotx rtf odm ods fods ots xls xlsx odp fodp otp ppt pptx ppsx odg fodg otg odf'.split(' '));
+

 function set_files_html(html) {
 	var files = ebi('files');
@ -4058,6 +4062,11 @@ var fileman = (function () {
 		}
 		shui.style.display = 'block';

+		var wr = has(perms, 'write') && !fns.length;
+		var nope = ['admin', 'move', 'delete', 'upget'];
+		if (!wr)
+			nope.push('write');
+
 		var html = [
 			'<div>',
 			'<table>',
@ -4078,10 +4087,10 @@ var fileman = (function () {
 			'<tr><td>perms</td><td class="sh_axs">',
 		];
 		for (var a = 0; a < perms.length; a++)
-			if (!has(['admin', 'move', 'delete', 'upget'], perms[a]))
+			if (!has(nope, perms[a]))
 				html.push('<a href="#" class="tgl btn">' + perms[a] + '</a>');

-		if (has(perms, 'write'))
+		if (wr)
 			html.push('<a href="#" class="btn">write-only</a>');

 		html.push('</td></tr></div');
@ -6430,6 +6439,9 @@ var ahotkeys = function (e) {
 	if (k == 'F2')
 		return fileman.rename();

+	if (k == 'F4')
+		return treectl.goto();
+
 	if (!treectl.hidden && (!sh || !thegrid.en)) {
 		if (kl == 'a')
 			return QS('#twig').click();
@ -7681,6 +7693,11 @@ var treectl = (function () {
 					tn.href = addq(tn.href, 'v');
 			}

+
+			if (wopi_set && wopi_set.has(tn.ext))
+				tn.lead = '<a href="?wopi=' + bhref +
+					'" rel="nofollow" name="' + hname + '">📄</a>';
+
 			if (tn.lead == '-')
 				tn.lead = '<a href="?doc=' + bhref + '" id="t' + id +
 					'" rel="nofollow" class="doc' + (lang ? ' bri' : '') +
@ -7773,6 +7790,7 @@ var treectl = (function () {

 	r.hydrate = function () {
 		qsr('#bbsw');
+		qsr('#js_bork');
 		srvinf = ebi('srv_info').innerHTML.slice(6, -7);
 		if (ls0 === null) {
 			r.ls_cb = showfile.addlinks;
@ -8859,7 +8877,7 @@ var msel = (function () {
 	r.evsel = function (e, fun) {
 		ev(e);
 		r.so = r.pr = null;
-		var trs = QSA('#files tbody tr');
+		var trs = QSA('#files tbody tr' + (ebi('unsearch') ? ':not(.srch_hdr)' : ''));
 		for (var a = 0, aa = trs.length; a < aa; a++)
 			clmod(trs[a], 'sel', fun);
 		r.selui();
--- a/copyparty/web/tl/chi.js
+++ b/copyparty/web/tl/chi.js
@ -39,6 +39,7 @@ Ls.chi = {
 			["ctrl-V", "粘贴（移动/复制）到此处"],
 			["Y", "下载选中项"],
 			["F2", "重命名选中项"],
+			["F4", "刷新"], //m

 			"文件列表选择",
 			["space", "切换文件选择"],
--- a/copyparty/web/tl/cze.js
+++ b/copyparty/web/tl/cze.js
@ -39,6 +39,7 @@ Ls.cze = {
 			["ctrl-V", "vložit (přesunout/kopírovat) zde"],
 			["Y", "stáhnout vybrané"],
 			["F2", "přejmenovat vybrané"],
+			["F4", "obnovit"], //m

 			"výběr souborů",
 			["space", "přepnout výběr souboru"],
--- a/copyparty/web/tl/deu.js
+++ b/copyparty/web/tl/deu.js
@ -39,6 +39,7 @@ Ls.deu = {
 			["STRG-V", "Zwischenablage hier einfügen"],
 			["Y", "Auswahl herunterladen"],
 			["F2", "Auswahl umbenennen"],
+			["F4", "Aktualisieren"], //m

 			"file-list-sel",
 			["LEER", "Dateiauswahl aktivieren"],
--- a/copyparty/web/tl/epo.js
+++ b/copyparty/web/tl/epo.js
@ -39,6 +39,7 @@ Ls.epo = {
 			["stir-V", "alglui (movi/kopii) ĉi tien"],
 			["Y", "elŝuti elektitajn"],
 			["F2", "alinomi elektitajn"],
+			["F4", "refreŝigi"], //m

 			"file-list-sel",
 			["spacoklavo", "baskuli elektadon de dosieroj"],
--- a/copyparty/web/tl/fin.js
+++ b/copyparty/web/tl/fin.js
@ -39,6 +39,7 @@ Ls.fin = {
 			["ctrl-V", "siirrä tai kopioi tähän"],
 			["Y", "lataa valitut"],
 			["F2", "uudelleennimeä valitut"],
+			["F4", "päivitä"], //m

 			"file-list-sel",
 			["space", "vaihda tiedostonvalintatilaan"],
--- a/copyparty/web/tl/fra.js
+++ b/copyparty/web/tl/fra.js
@ -39,6 +39,7 @@ Ls.fra = {
 			["ctrl-V", "coller (déplacer/copier) ici"],
 			["Y", "télécharger la sélection"],
 			["F2", "renomer la sélection"],
+			["F4", "actualiser"], //m

 			"file-list-sel",
 			["Espace", "activer la sélection de fichiers"],
--- a/copyparty/web/tl/grc.js
+++ b/copyparty/web/tl/grc.js
@ -39,6 +39,7 @@ Ls.grc = {
 			["ctrl-V", "επικόλληση (μετακίνηση/αντιγραφή) εδώ"],
 			["Y", "λήψη επιλεγμένων"],
 			["F2", "μετονομασία επιλεγμένων"],
+			["F4", "ανανέωση"], //m

 			"λίστα αρχείων",
 			["space", "εναλλαγή επιλογής αρχείου"],
--- a/copyparty/web/tl/hun.js
+++ b/copyparty/web/tl/hun.js
@ -36,6 +36,7 @@ Ls.hun = {
 			['ctrl-V', 'beillesztés ide'],
 			['Y', 'kijelöltek letöltése'],
 			['F2', 'átnevezés'],
+			["F4", "frissítés"], //m

 			'kijelölés',
 			['space', 'fájl kijelölése'],
--- a/copyparty/web/tl/ita.js
+++ b/copyparty/web/tl/ita.js
@ -39,6 +39,7 @@ Ls.ita = {
 			["ctrl-V", "incolla (sposta/copia) qui"],
 			["Y", "scarica selezionati"],
 			["F2", "rinomina selezionati"],
+			["F4", "aggiorna"], //m

 			"file-list-sel",
 			["spazio", "alterna selezione file"],
--- a/copyparty/web/tl/jpn.js
+++ b/copyparty/web/tl/jpn.js
@ -39,6 +39,7 @@ Ls.jpn = {
 			["ctrl-V", "ここに貼り付け（移動/コピー）"],
 			["Y", "選択した項目をダウンロード"],
 			["F2", "選択した項目の名前を変更"],
+			["F4", "更新"], //m

 			"file-list-sel",
 			["space", "ファイル選択の切り替え"],
--- a/copyparty/web/tl/kor.js
+++ b/copyparty/web/tl/kor.js
@ -39,6 +39,7 @@ Ls.kor = {
 			["ctrl-V", "여기에 붙여넣기 (이동/복사)"],
 			["Y", "선택 항목 다운로드"],
 			["F2", "선택 항목 이름 바꾸기"],
+			["F4", "새로 고침"], //m

 			"파일 목록 선택",
 			["space", "파일 선택/해제"],
--- a/copyparty/web/tl/nld.js
+++ b/copyparty/web/tl/nld.js
@ -39,6 +39,7 @@ Ls.nld = {
 			["ctrl-V", "Hier plakken (verplaatsen/kopieëren)"],
 			["Y", "Download geselecteerde"],
 			["F2", "Hernoem geselecteerde"],
+			["F4", "vernieuwen"], //m

 			"bestand-lijst-selectie",
 			["space", "wissel bestand selectie"],
--- a/copyparty/web/tl/nno.js
+++ b/copyparty/web/tl/nno.js
@ -36,6 +36,7 @@ Ls.nno = {
 			["ctrl-V", "lim inn (flytt/kopiér)"],
 			["Y", "last ned valde"],
 			["F2", "endre namn på valde"],
+			["F4", "oppdater"],

 			"filmarkering",
 			["space", "markér fil"],
--- a/copyparty/web/tl/nor.js
+++ b/copyparty/web/tl/nor.js
@ -36,6 +36,7 @@ Ls.nor = {
 			["ctrl-V", "lim inn (flytt/kopiér)"],
 			["Y", "last ned valgte"],
 			["F2", "endre navn på valgte"],
+			["F4", "oppdater"],

 			"filmarkering",
 			["space", "marker fil"],
--- a/copyparty/web/tl/pol.js
+++ b/copyparty/web/tl/pol.js
@ -39,6 +39,7 @@ Ls.pol = {
 			["ctrl-V", "wklej (przenieś/skopiuj) tutaj"],
 			["Y", "pobierz zaznaczone"],
 			["F2", "zmień nazwę zaznaczonych"],
+			["F4", "odśwież"], //m

 			"file-list-sel",
 			["spacja", "przełącz zaznaczanie plików"],
--- a/copyparty/web/tl/por.js
+++ b/copyparty/web/tl/por.js
@ -39,6 +39,7 @@ Ls.por = {
 			["ctrl-V", "colar (mover/copiar) aqui"],
 			["Y", "baixar selecionado"],
 			["F2", "renomear selecionado"],
+			["F4", "atualizar"], //m

 			"seleção de lista de arquivos",
 			["espaço", "alternar seleção de arquivo"],
--- a/copyparty/web/tl/rus.js
+++ b/copyparty/web/tl/rus.js
@ -39,6 +39,7 @@ Ls.rus = {
 			["ctrl-V", "вставить (переместить/копировать) сюда"],
 			["Y", "скачать выделенное"],
 			["F2", "переименовать выделенное"],
+			["F4", "обновить"], //m

 			"выделение файлов",
 			["пробел", "выделить/снять выделение с текущего файла"],
--- a/copyparty/web/tl/spa.js
+++ b/copyparty/web/tl/spa.js
@ -39,6 +39,7 @@ Ls.spa = {
 			["ctrl-V", "pegar (mover/copiar) aquí"],
 			["Y", "descargar seleccionados"],
 			["F2", "renombrar seleccionados"],
+			["F4", "actualizar"], //m

 			"selección en lista de archivos",
 			["space", "alternar selección de archivo"],
--- a/copyparty/web/tl/swe.js
+++ b/copyparty/web/tl/swe.js
@ -39,6 +39,7 @@ Ls.swe = {
 			["ctrl-V", "klistra in (kopiera/flytta) hit"],
 			["Y", "ladda ner urval"],
 			["F2", "byt namn på urval"],
+			["F4", "uppdatera"], //m

 			"välja filer",
 			["Blanksteg", "växla val av fil"],
--- a/copyparty/web/tl/tur.js
+++ b/copyparty/web/tl/tur.js
@ -39,6 +39,7 @@ Ls.tur = {
 			["ctrl-V", "buraya yapıştır (taşı/kopyala)"],
 			["Y", "seçileni indir"],
 			["F2", "seçileni yeniden adlandır"],
+			["F4", "yenile"], //m

 			"dosya yönetimi seçimleri",
 			["boşluk", "seçimi değiştir"],
--- a/copyparty/web/tl/ukr.js
+++ b/copyparty/web/tl/ukr.js
@ -39,6 +39,7 @@ Ls.ukr = {
 			["ctrl-V", "вставити (перемістити/копіювати) сюди"],
 			["Y", "завантажити вибране"],
 			["F2", "перейменувати вибране"],
+			["F4", "оновити"], //m

 			"вибір файлів у списку",
 			["space", "перемкнути вибір файлу"],
--- a/copyparty/web/tl/vie.js
+++ b/copyparty/web/tl/vie.js
@ -36,6 +36,7 @@ Ls.vie = {
 			["ctrl-V", "dán (di chuyển/sao chép) tại đây"],
 			["Y", "tải xuống mục đã chọn"],
 			["F2", "đổi tên mục đã chọn"],
+			["F4", "làm mới"], //m

 			"file-list-sel",
 			["space", "chuyển đổi chọn tệp"],
--- a/copyparty/web/up2k.js
+++ b/copyparty/web/up2k.js
@ -998,6 +998,14 @@ function up2k_init(subtle) {
            });
    }

+    function unqueue_up(t) {
+        t.postlist = [];
+        var arr = st.todo.upload;
+        for (var a = arr.length - 1; a >= 0; a--)
+            if (arr[a].nfile == t.n)
+                arr.splice(a, 1);
+    }
+
    var pvis = new U2pvis("bz", '#u2cards', uc, st),
        donut = new Donut(uc, st);

@ -1069,25 +1077,28 @@ function up2k_init(subtle) {
        return onovercmn(this, e, true);
    }
    function onovercmn(self, e, btn) {
+        var ok = false;
        try {
-            var ok = false, dt = e.dataTransfer.types;
-            for (var a = 0; a < dt.length; a++)
+            var dt = e.dataTransfer.types;
+
+            for (var a = 0; a < dt.length && !ok; a++)
                if (dt[a] == 'Files')
                    ok = true;
-                else if (dt[a] == 'text/uri-list') {
-                    if (btn) {
+
+            for (var a = 0; a < dt.length && !ok; a++)
+                if (dt[a] == 'text/uri-list') {
+                    if (btn)
                        ok = true;
-                        if (toast.txt == L.u_uri)
-                            toast.hide();
-                    }
                    else
                        return toast.inf(10, L.u_uri) || true;
                }

-            if (!ok)
-                return true;
+            if (toast.txt == L.u_uri && ok)
+                toast.hide();
        }
        catch (ex) { }
+        if (!ok)
+            return true;

        ev(e);
        try {
@ -2509,6 +2520,7 @@ function up2k_init(subtle) {
            keepalive = t.keepalive,
            me = Date.now();

+        while (apop(st.todo.handshake, t));
        if (t.done)
            return console.log('done; skip hs', t.name, t);

@ -2627,7 +2639,7 @@ function up2k_init(subtle) {
                    cbd.push(a == cdr_idx ? cdr_sz : chunksize);
                }

-                t.postlist = [];
+                unqueue_up(t);
                t.wark = response.wark;
                var missing = response.hash;
                for (var a = 0; a < missing.length; a++) {
@ -2916,8 +2928,7 @@ function up2k_init(subtle) {
            var txt = unpre((xhr.response && xhr.response.err) || xhr.responseText);
            if (txt.indexOf('upload blocked by x') + 1) {
                apop(st.busy.upload, upt);
-                for (var a = pcar; a <= pcdr; a++)
-                    apop(t.postlist, a);
+                unqueue_up(t);
                pvis.seth(t.n, 1, "ERROR");
                pvis.seth(t.n, 2, txt.split(/\n/)[0]);
                pvis.move(t.n, 'ng');
@ -2940,8 +2951,10 @@ function up2k_init(subtle) {
                st.etac.u++;
                st.etac.t++;
            }
-            else if (txt.indexOf('already got that') + 1 ||
-                txt.indexOf('already being written') + 1) {
+            else if (txt.indexOf('already got that') + 1) {
+                unqueue_up(t);
+            }
+            else if (txt.indexOf('already being written') + 1) {
                t.nojoin = t.nojoin || t.postlist.length;
                console.log("ignoring dupe-segment with backoff", t.nojoin, t.name, t);
                if (!toast.visible && st.todo.upload.length < 4)
@ -2949,6 +2962,10 @@ function up2k_init(subtle) {
            }
            else {
                xhrchk(xhr, L.u_cuerr2.format(snpart, Math.ceil(t.size / chunksize), esc(t.name)), "404, target folder not found (???)", "warn", t);
+                if (txt.indexOf('unknown wark') == 0) {
+                    t.cooldown = t.coolmul = 0;
+                    unqueue_up(t);
+                }
                chill(t);
            }
            orz2(xhr);
@ -2959,8 +2976,10 @@ function up2k_init(subtle) {
                apop(t.postlist, a);
            if (!t.postlist.length) {
                t.t_uploaded = Date.now();
-                pvis.seth(t.n, 1, 'verifying');
-                st.todo.handshake.unshift(t);
+                if (!has(st.busy.handshake, t)) {
+                    pvis.seth(t.n, 1, 'verifying');
+                    st.todo.handshake.unshift(t);
+                }
            }
            tasker();
        }
@ -2995,6 +3014,7 @@ function up2k_init(subtle) {
                if (!toast.visible)
                    toast.warn(9.98, L.u_cuerr.format(snpart, Math.ceil(t.size / chunksize), esc(t.name)), t);

+                unqueue_up(t);  // maybe unknown wark (ff drops undrained rsp)
                t.nojoin = t.nojoin || t.postlist.length;  // maybe rproxy postsize limit
                console.log('chunkpit onerror,', t.name, t);
                orz2(xhr);
--- a/copyparty/web/util.js
+++ b/copyparty/web/util.js
@ -1199,8 +1199,10 @@ function has(haystack, needle) {

 function apop(arr, v) {
    var ofs = arr.indexOf(v);
-    if (ofs !== -1)
+    if (ofs !== -1) {
        arr.splice(ofs, 1);
+        return true;
+    }
 }


@ -1466,7 +1468,7 @@ function Debounce(delay) {
    };

    r.rm = function (fun) {
-        apop(r.q, fun);
+        while (apop(r.q, fun));
    };

    r.run = function () {
@ -1526,7 +1528,7 @@ var timer = (function () {
    };

    r.rm = function (fun) {
-        apop(r.q, fun);
+        while (apop(r.q, fun));
    };

    var doevents = function () {
--- a/copyparty/web/wopi.html
+++ b/copyparty/web/wopi.html
@ -0,0 +1,42 @@
+<!DOCTYPE html>
+<html lang="en" id="ht_wopi">
+
+<head>
+    <meta charset="utf-8"/>
+    <title>{{ title|e }}</title>
+	<meta http-equiv="X-UA-Compatible" content="IE=edge">
+    <meta name="viewport" content="width=device-width, initial-scale=1"/>
+	<meta name="robots" content="noindex, nofollow">
+	<meta name="theme-color" content="#{{ tcolor }}">
+    <style>
+
+body,#w {
+    margin: 0;
+    padding: 0;
+    border: 0;
+    width: 100%;
+    height: 100%;
+}
+body {
+    width: 100vw;
+    height: 100vh;
+    overflow: hidden;
+}
+
+</style></head><body>
+    <div style="display: none">
+        <form action="{{ url }}" enctype="multipart/form-data" method="post" target="w" id="submit-form">
+            <input name="access_token" value="{{ atoken }}" type="hidden" id="access-token"/>
+            <input name="access_token_ttl" value="{{ ttl }}000" type="hidden" id="access-token_ttl"/>
+            <input type="submit" value="" />
+        </form>
+    </div>
+
+    <iframe id="w" name="w" allow="clipboard-read *; clipboard-write *; fullscreen *"></iframe>
+
+    <script nonce="{{ js_nonce }}">
+        document.getElementById("submit-form").submit();
+    </script>
+</body>
+</html>
+
--- a/docs/changelog.md
+++ b/docs/changelog.md
@ -1,3 +1,78 @@
+▀▀▀▀▀▀▀▀▀▀▀▀▀▀▀▀▀▀▀▀▀▀▀▀▀▀▀▀▀▀▀▀▀▀▀▀▀▀▀▀▀▀▀▀▀▀▀▀▀▀▀▀▀▀  
+# 2026-0727-2202  `v1.20.19`  SECURITY: fix FTP upload outside volume
+
+## ⚠️ ATTN: this release fixes a vulnerability in FTP and FTPS (not SFTP)
+
+the FTP-server (default-disabled) would allow uploading to any folder that the copyparty process had permission to write to, but with certain limitations; see [GHSA-phv8-wgjp-g4p9](https://github.com/9001/copyparty/security/advisories/GHSA-phv8-wgjp-g4p9)
+
+## recent important news
+
+* [v1.20.19 (2026-07-27)](https://github.com/9001/copyparty/releases/tag/v1.20.19) fixed an FTP-server vuln (upload outside defined volumes)
+* [v1.20.17 (2026-07-06)](https://github.com/9001/copyparty/releases/tag/v1.20.17) fixed a vuln when a volume has both filekeys and dirkeys enabled
+* [v1.20.17 (2026-07-06)](https://github.com/9001/copyparty/releases/tag/v1.20.17) introduced csp nonces, possibly breaking some javascript-based plugins
+
+## 🧪 new features
+
+* #1495 wopi integration -- edit office documents in the web-ui (thx @brandon-doornbos!) d57bb0c7 10db4236
+  * currently only works with collabora online as wopi client #1574 and there's no docs/examples #1575
+* thumbnails: use embedded cover-image in videos when available 59524018
+* thumbnails: folder-thumbs can be disabled with `th-covers: no` (volflag or global) 856fada3
+* #1555 macos: add [--srch-nfkc](https://copyparty.eu/cli/#g-srch-nfkc) to fix searching for filenames / paths in CJK languages a7c99094
+  * reduces search performance to around 30% when enabled
+* hooks: `xbr` / `xar` did not include old/new abspath as parameters; now they do c122e103
+
+## 🩹 bugfixes
+
+* ftp: fix [GHSA-phv8-wgjp-g4p9](https://github.com/9001/copyparty/security/advisories/GHSA-phv8-wgjp-g4p9) b331bb1c
+* #1563 moving files between volumes could fail depending on OS and underlying filesystem c70dc7ac
+* fix drag-drop uploading in certain glitchy KDE environments (thx @tilse!) daf144af
+* hooks: `xiu` crashed if the fork-flag was set (thx @stackxp!) aa862353
+* hooks: `xau` without json-flag would be given the wark (file hash) instead of the abspath bae77b90
+* shares: fix markdown-viewer (`?v`) inside shares 6a9437b7
+* ftp: fix logging from `xbu` hooks 9912a951
+* fix slow boot if a volume had lots of files in its toplevel folder cdb474c8
+* python2.7: fix multithreaded file-hashing 0f2040c3
+
+## 🔧 other changes
+
+* #1556 the libvips thumbnailer was demoted to last-fallback due to frequently using excessive amounts of ram ed0be42a
+* if [-lo](https://copyparty.eu/cli/#g-lo) points to an existing file, it will now be appended to instead of overwritten depending on [--rlo](https://copyparty.eu/cli/#g-help-rlo) b6abc33f
+* #1530 nixos: the nix package now uses `ffmpeg-headless` instead of `ffmpeg-full` (thx @nyakase!) fface524
+* slightly longer session cookie (was 20, now 24 chars) 537a99df
+* Windows-specific:
+  * add a warning regarding the risks of DLL-hijacking when relevant bb40804f
+  * fix some trivial PATH-related footguns cea97ac6
+  * faster creation of sparse files bc45299b
+  * fix detection of filesystem characteristics 6226858b
+
+
+
+▀▀▀▀▀▀▀▀▀▀▀▀▀▀▀▀▀▀▀▀▀▀▀▀▀▀▀▀▀▀▀▀▀▀▀▀▀▀▀▀▀▀▀▀▀▀▀▀▀▀▀▀▀▀  
+# 2026-0709-2254  `v1.20.18`  bwrap off
+
+## 🧪 new features
+
+* [shadowing](https://github.com/9001/copyparty/#shadowing): filesystem-path `//NULL` will fully unmap a volume from the server's filesystem (no more `/var/lib/empties/4` jank) 88846061
+
+## 🩹 bugfixes
+
+* fix a false-positive warning on startup 12878e6c1cbf4417da42d46230dff686dd48760b
+
+## 🔧 other changes
+
+* #1552 #1551 default-disabled the bwrap ffmpeg sandbox; 85a8cc99
+  * sandboxing can fail in too many creative ways (funky linux distros with funky filesystem layouts and policies) so autoconfiguring bwrap is not feasible
+  * to enable it, set `use-bwrap: y` after adjusting [th-bwrap](https://copyparty.eu/cli/#g-th-bwrap) to match your OS/env
+    * see the default `th-bwrap` value in `--help` on your server for a best-effort guess
+* always rotate (never overwrite) `-lo` logfiles on startup unless `--rlo no` 29e145f5
+* thumbnails: save a tiny bit of I/O by not refreshing expiration-times if `th-clean` (expiration) is disabled anyways e15f2927
+
+## 🌠 fun facts
+
+* no
+
+
+
 ▀▀▀▀▀▀▀▀▀▀▀▀▀▀▀▀▀▀▀▀▀▀▀▀▀▀▀▀▀▀▀▀▀▀▀▀▀▀▀▀▀▀▀▀▀▀▀▀▀▀▀▀▀▀  
 # 2026-0706-1937  `v1.20.17`  SECURITY: fix dirkeys

--- a/docs/chunksizes.py
+++ b/docs/chunksizes.py
@ -26,7 +26,7 @@ def up2k_chunksize(filesize):
    stepsize = 512 * 1024
    while True:
        for mul in [1, 2]:
-            nchunks = math.ceil(filesize * 1.0 / chunksize)
+            nchunks = -int(-filesize // chunksize)
            if nchunks <= 256 or (chunksize >= 32 * 1024 * 1024 and nchunks <= 4096):
                return chunksize

--- a/docs/example2.conf
+++ b/docs/example2.conf
@ -1,6 +1,7 @@
 # you can include additional config like this
 # (the space after the % is important)
 #
+# specify either a single file or a folder with .conf files;
 # since copyparty.d is a folder, it'll include all *.conf
 # files inside (not recursively) in alphabetical order
 # (not necessarily same as numerical/natural order)
--- a/scripts/docker/README.md
+++ b/scripts/docker/README.md
@ -49,7 +49,7 @@ with image size after installation and when gzipped
 * [`min`](https://hub.docker.com/r/copyparty/min) (57 MiB, 20 gz) is just copyparty itself
 * [`im`](https://hub.docker.com/r/copyparty/im) (70 MiB, 25 gz) can thumbnail images with pillow, parse media files with mutagen
 * [`ac` (163 MiB, 56 gz)](https://hub.docker.com/r/copyparty/ac) is `im` plus ffmpeg for video/audio thumbs + audio transcoding + better tags
-* [`iv`](https://hub.docker.com/r/copyparty/iv) (211 MiB, 73 gz) is `ac` plus vips for faster heif / avic / jxl thumbnails
+* [`iv`](https://hub.docker.com/r/copyparty/iv) (211 MiB, 73 gz) is `ac` plus vips for more thumbnail formats
 * [`dj`](https://hub.docker.com/r/copyparty/dj) (309 MiB, 104 gz) is `iv` plus beatroot/keyfinder to detect musical keys and bpm

 [`ac` is recommended](https://hub.docker.com/r/copyparty/ac) since the additional features available in `iv` and `dj` are rarely useful
--- a/scripts/genhelp.sh
+++ b/scripts/genhelp.sh
@ -15,7 +15,7 @@ command -v gsort >/dev/null && {

 cd ../dist

-kwds='-bind -accounts -auth -auth-ord -flags -handlers -hooks -idp -urlform -exp -ls -dbd -chmod -pwhash -zm'
+kwds='-bind -accounts -auth -auth-ord -flags -handlers -hooks -idp -urlform -exp -rlo -ls -dbd -chmod -pwhash -zm'

 export PRTY_FULL_HELP=1
 export PRTY_NO_PARAMIKO=1
--- a/scripts/pyinstaller/build.sh
+++ b/scripts/pyinstaller/build.sh
@ -58,6 +58,7 @@ rm -rf mods/magic/
    sed -ri '/(bccache|PackageLoader)/d' mods/jinja2/__init__.py
    af '/^class/{s=0}/^class PackageLoader/{s=1}!s' mods/jinja2/loaders.py
    sed -ri 's/from url.*Request, urlopen.*/pass/' mods/copyparty/svchub.py
+    sed -ri 's/from urllib.* import urlopen.*/pass/' mods/copyparty/httpcli.py
    sed -ri 's/(.*"--vc-.*, help=).*/\1argparse.SUPPRESS)/' mods/copyparty/__main__.py
 }
 [ $w10 ] && {
--- a/scripts/pyinstaller/loader.ico
+++ b/scripts/pyinstaller/loader.ico
--- a/scripts/pyinstaller/up2k.ico
+++ b/scripts/pyinstaller/up2k.ico
--- a/scripts/sfx.ls
+++ b/scripts/sfx.ls
@ -141,3 +141,4 @@ copyparty/web/tl/vie.js,
 copyparty/web/ui.css,
 copyparty/web/up2k.js,
 copyparty/web/util.js,
+copyparty/web/wopi.html,
--- a/scripts/sfx.py
+++ b/scripts/sfx.py
@ -1,6 +1,6 @@
 #!/usr/bin/env python3
 # coding: latin-1
-from __future__ import print_function, unicode_literals
+from __future__ import division, print_function, unicode_literals
 import re, os, sys, time, shutil, signal, tarfile, hashlib, platform, tempfile, traceback
 import subprocess as sp

--- a/scripts/strip_hints/a.py
+++ b/scripts/strip_hints/a.py
@ -1,5 +1,5 @@
 # coding: utf-8
-from __future__ import print_function, unicode_literals
+from __future__ import division, print_function, unicode_literals

 import os
 import sys
--- a/scripts/tl.js
+++ b/scripts/tl.js
@ -71,6 +71,7 @@ Ls.hmn = {
 			["ctrl-V", "paste (move/copy) here"],
 			["Y", "download selected"],
 			["F2", "rename selected"],
+			["F4", "update/refresh"],

 			"file-list-sel",
 			["space", "toggle file selection"],
--- a/scripts/uncomment.py
+++ b/scripts/uncomment.py
@ -1,6 +1,6 @@
 #!/usr/bin/env python3
 # coding: utf-8
-from __future__ import print_function, unicode_literals
+from __future__ import division, print_function, unicode_literals

 import io
 import os
--- a/tests/test_cp.py
+++ b/tests/test_cp.py
@ -1,6 +1,6 @@
 #!/usr/bin/env python3
 # coding: utf-8
-from __future__ import print_function, unicode_literals
+from __future__ import division, print_function, unicode_literals

 import os
 import shutil
--- a/tests/test_dedup.py
+++ b/tests/test_dedup.py
@ -1,6 +1,6 @@
 #!/usr/bin/env python3
 # coding: utf-8
-from __future__ import print_function, unicode_literals
+from __future__ import division, print_function, unicode_literals

 import json
 import os
--- a/tests/test_dots.py
+++ b/tests/test_dots.py
@ -1,6 +1,6 @@
 #!/usr/bin/env python3
 # coding: utf-8
-from __future__ import print_function, unicode_literals
+from __future__ import division, print_function, unicode_literals

 import io
 import json
--- a/tests/test_dxml.py
+++ b/tests/test_dxml.py
@ -1,6 +1,6 @@
 #!/usr/bin/env python3
 # coding: utf-8
-from __future__ import print_function, unicode_literals
+from __future__ import division, print_function, unicode_literals

 import re
 import unittest
--- a/tests/test_hooks.py
+++ b/tests/test_hooks.py
@ -1,6 +1,6 @@
 #!/usr/bin/env python3
 # coding: utf-8
-from __future__ import print_function, unicode_literals
+from __future__ import division, print_function, unicode_literals

 import os
 import shutil
--- a/tests/test_httpcli.py
+++ b/tests/test_httpcli.py
@ -1,6 +1,6 @@
 #!/usr/bin/env python3
 # coding: utf-8
-from __future__ import print_function, unicode_literals
+from __future__ import division, print_function, unicode_literals

 import io
 import os
--- a/tests/test_idp.py
+++ b/tests/test_idp.py
@ -1,6 +1,6 @@
 #!/usr/bin/env python3
 # coding: utf-8
-from __future__ import print_function, unicode_literals
+from __future__ import division, print_function, unicode_literals

 import json
 import os
--- a/tests/test_metrics.py
+++ b/tests/test_metrics.py
@ -1,6 +1,6 @@
 #!/usr/bin/env python3
 # coding: utf-8
-from __future__ import print_function, unicode_literals
+from __future__ import division, print_function, unicode_literals

 import os
 import re
--- a/tests/test_mv.py
+++ b/tests/test_mv.py
@ -1,6 +1,6 @@
 #!/usr/bin/env python3
 # coding: utf-8
-from __future__ import print_function, unicode_literals
+from __future__ import division, print_function, unicode_literals

 import json
 import os
--- a/tests/test_shr.py
+++ b/tests/test_shr.py
@ -1,6 +1,6 @@
 #!/usr/bin/env python3
 # coding: utf-8
-from __future__ import print_function, unicode_literals
+from __future__ import division, print_function, unicode_literals

 import json
 import os
--- a/tests/test_utils.py
+++ b/tests/test_utils.py
@ -1,6 +1,6 @@
 #!/usr/bin/env python3
 # coding: utf-8
-from __future__ import print_function, unicode_literals
+from __future__ import division, print_function, unicode_literals

 import unittest

--- a/tests/test_vfs.py
+++ b/tests/test_vfs.py
@ -1,6 +1,6 @@
 #!/usr/bin/env python3
 # coding: utf-8
-from __future__ import print_function, unicode_literals
+from __future__ import division, print_function, unicode_literals

 import json
 import os
--- a/Show more
+++ b/Show more
Author	SHA1	Message	Date
ed	fbcb773307	failed the git skillcheck	2026-08-06 22:10:18 +00:00
ed	3eb7b46d83	optimize	2026-08-06 21:08:34 +00:00
h3	4f20738b71	haproxy: add X-Forwarded-Proto to example (codeberg#6) Reviewed-on: https://codeberg.org/9001/copyparty/pulls/6	2026-08-05 01:52:58 +02:00
ed	ef75220faf	update pkgs to 1.20.20	2026-08-03 22:36:36 +00:00
ed	a3acbfcd5b	v1.20.20	2026-08-03 22:32:26 +00:00
Danila Kamaev	fdf52a8c4e	wopi: fix onlyoffice opening docs in readonly mode (#1585 )	2026-08-03 22:02:18 +00:00
ed	b9405a3e25	mute no-rss-warning for shares	2026-08-03 21:57:22 +00:00
ed	6f924829ee	detect broken csp nonce	2026-08-03 21:56:45 +00:00
Danila Kamaev	24a4090fc7	wopi: add wopi-urls option (#1580 ); map different copyparty hosts to different WOPI client addresses	2026-08-03 20:30:38 +00:00
ed	c0c638c917	up2k: re-hs if unknown-wark or chunk-exists; previous behavior: * when a chunk already existed on the server, it would unstitch and continue retrying each individual chunk * upon unknown-wark (file already completed), it would upload the remaining scheduled chunks before bailing the unknown-wark behavior was accidental bullshit the chunk-exists behavior was intentional, assumed optimal for preserving tcp window-scaling, just not when running behind a bufferbloating reverseproxy which may disconnect the client on a timeout before the response is delivered, and "some clients" still follow rfc2616-8.2.4 (retries the POST, wtf...) wasting bandwidth + maybe further worsening conditions "some clients" is specifically firefox with the devtools not open another firefox joke is that it doesn't read the server-response if the server does not drain the request-body; we end up in xhr.onerror with no idea why, must assume the worst new behavior: in both scenarios, drop all scheduled chunks to be uploaded and redo handshake, to as far as possible avoid retransmissions; firefox will still eagerly retry 4 times but whatever u2c was/is fine; nothing to be done depending on network conditions and physical distance, this MAY result in lower total speed, but the average case is likely a net-positive, wasting less bandwidth on retransmissions, in exchange for resetting tcp window-scaling	2026-08-03 20:08:19 +00:00
ed	2c6497b644	add hotkey F4	2026-08-03 18:55:24 +00:00
ed	2c4033831f	js: while(apop)	2026-08-02 23:02:44 +00:00
ed	2880117265	fix ^a in search-results; closes #1581	2026-08-02 22:41:57 +00:00
yuki	63c61b6729	nixos: fix version checker (#1582 ) Nixpkgs patches many libraries to read certificate bundle mentioned in NIX_SSL_CERT_FILE, and /nix/store is already present in the sandbox. Related to https://github.com/NixOS/nixpkgs/issues/409848	2026-08-02 21:48:24 +00:00
ed	5c157be955	show subvolume size in listings; * descends recursively to all nested volumes * values are static, update on volume-rescan * closes #634 #1033 #1390 Co-authored-by: Victor Phillips <victor.m.phillips@protonmail.com>	2026-08-01 22:23:58 +00:00
Wuerfel21	9f5f9d8884	th: .kra (krita) + .ora (openraster) (#1577 )	2026-07-30 18:39:31 +00:00
ed	4003a47723	multipart boundary max-len	2026-07-30 18:22:45 +00:00
ed	398fcf1d18	update pkgs to 1.20.19	2026-07-27 22:08:01 +00:00
ed	ac4be555f6	v1.20.19	2026-07-27 22:02:50 +00:00
ed	75c7502c34	mkdir: translit illegals instead of failing	2026-07-27 21:25:21 +00:00
ed	9912a95166	ftp: logging + fix xbu log	2026-07-27 19:06:25 +00:00
ed	b331bb1c8c	ftp: fix GHSA-phv8-wgjp-g4p9 (stou)	2026-07-27 18:50:44 +00:00
ed	c122e103bd	hooks: xar/xbr: old/new ap	2026-07-27 18:45:35 +00:00
ed	6226858b89	windows: fix fsnt detection	2026-07-27 17:35:45 +00:00
ed	cea97ac6fd	windows: restrict tool paths; the warning in commit `bb40804f2d` is still true, but this makes copyparty slightly safer in environments where hostile binaries may appear in CWD	2026-07-27 17:34:52 +00:00
ed	bc45299b86	windows: optimize sparse file creation; previously shelled out to system32/fsutil.exe; expensive and pointless since all it does is call DeviceIoControl (ioctl) this is not a security fix; just like most software on windows, copyparty is still vulnerable to DLL hijacking, so this change makes little-to-no difference security-wise; commit `bb40804f2d` plus, the default config (sharing current folder read-write without auth) was meant to be obviously insecure, intended for quick shares on a small LAN rather than untrusted networks	2026-07-27 17:20:25 +00:00
ed	bb40804f2d	windows: add DLL-hijacking warning; famously, windows prefers cwd when resolving a binary to execute, rather than a predefined PATH like linux / unix / every other OS even worse, it also does this for DLLs, and mitigating that is infeasible because it depends on variables we dont control print a warning in case someone is unaware of this	2026-07-27 17:15:00 +00:00
ed	c70dc7ac56	android: fix cross-fs mv; closes #1563	2026-07-26 21:19:33 +00:00
ed	b6abc33fb3	lo: rlo: more spaghetti	2026-07-26 16:49:05 +00:00
ed	537a99df52	bump session-cookie from 20 to 24 ch	2026-07-26 16:47:17 +00:00
ed	cdb474c8ec	fix slow boot when a volume root has many files	2026-07-26 16:45:49 +00:00
ed	0f2040c383	ceil by integer math	2026-07-26 15:23:33 +00:00
ed	e49f6cca17	py2: future division	2026-07-26 15:19:58 +00:00
ed	10db4236bf	wopi: new-file, j2-template	2026-07-24 15:34:56 +00:00
Brandon Doornbos	d57bb0c701	add wopi (#1495 ) basic wopi integration --------- Signed-off-by: ed <s@ocv.me> Co-authored-by: ed <s@ocv.me>	2026-07-24 15:28:05 +00:00
Nia	fface524c3	nix: use ffmpeg-headless (#1530 )	2026-07-22 17:16:02 +02:00
ed	bae77b9078	hooks: xau: fix argv (ap, not wark)	2026-07-21 18:40:47 +00:00
ed	b2e4b1c46c	shares: dont suggest write for fileshares; the ui would still show the option to grant write-permission when creating a fileshare; pointless since an existing file can't be overwritten without the delete-permission while this is obvious and nobody would intentionally create a fileshare with write, avoid any confusion by hiding it	2026-07-18 20:36:41 +00:00
ed	4543ab31d3	cgen cleanup	2026-07-17 22:20:56 +00:00
ed	856fada3c7	th-covers volflag; `no` disables folderthumbs	2026-07-17 22:18:17 +00:00
stackxp	aa86235360	hooks: xiu: fix fork (#1558 )	2026-07-17 18:33:06 +00:00
ed	6a9437b77c	shares: fix md-viewer	2026-07-16 20:32:35 +00:00
ed	5952401815	th: video: prefer embedded cover/pic	2026-07-15 22:00:33 +00:00
ed	ed0be42a3b	th: demote vips (#1556 ); use libvips as last resort due to risk of OOM; example: libvips defers to imagemagick for animated avif, and imagemagick probably does an identify, iterating through each frame, itself consuming 100+ MiB RAM, which libvips amplifies to 7+ GiB similar behavior is observed with `identify a.mkv` in a shell	2026-07-15 21:59:45 +00:00
ed	daf144af61	up2k: fix dragdrop datatransfer type detection; `text/uri-list` observed before `Files` once on wayland dolphin Co-authored-by: Til Schmitter <til.schmitter@gmail.com>	2026-07-15 21:21:32 +00:00
ed	a7c99094dd	add --srch-nfkc (closes #1555 ); option to unicode-normalize filepaths during search; useful for: * macos servers with cjk filenames * cjk stuff originating from a macos device	2026-07-15 20:09:11 +00:00
ed	daee3e8500	docs: config include (#1554 )	2026-07-12 18:47:15 +00:00
ed	96bafb8f4a	update pkgs to 1.20.18	2026-07-09 22:59:43 +00:00