hooks

standalone programs which are executed by copyparty when an event happens (upload, file rename, delete, ...)

these programs either take zero arguments, or a filepath (the affected file), or a json message with filepath + additional info

run copyparty with --help-hooks for usage details / hook type explanations (xm/xbu/xau/xiu/xbc/xac/xbr/xar/xbd/xad/xban)

in particular, if a hook is loaded into copyparty with the hook-flag c ("check") then its exit-code controls the action that launched the hook:

• exit-code 0 = allow the action, and/or continue running the next hook
• exit-code 100 = allow the action, and stop running any remaining consecutive hooks
• anything else = reject/prevent the original action, and don't run the remaining hooks

note: in addition to event hooks (the stuff described here), copyparty has another api to run your programs/scripts while providing way more information such as audio tags / video codecs / etc and optionally daisychaining data between scripts in a processing pipeline; if that's what you want then see mtp plugins instead

after upload

• notify.py shows a desktop notification (example)
  • notify2.py uses the json API to show more context
• image-noexif.py removes image exif by overwriting / directly editing the uploaded file
• discord-announce.py announces new uploads on discord using webhooks (example)
• reject-mimetype.py rejects uploads unless the mimetype is acceptable
• into-the-cache-it-goes.py avoids bugs in caching proxies by immediately downloading each file that is uploaded
• podcast-normalizer.py creates a second file with dynamic-range-compression whenever an audio file is uploaded
  • good example of the idx hook effect to tell copyparty about additional files to scan/index

upload batches

these are --xiu hooks; unlike xbu and xau (which get executed on every single file), xiu hooks are given a list of recent uploads on STDIN after the server has gone idle for N seconds, reducing server load + providing more context

• xiu.py is a "minimal" example showing a list of filenames + total filesize
• xiu-sha.py produces a sha512 checksum list in the volume root

before upload

• reject-extension.py rejects uploads if they match a list of file extensions
• reloc-by-ext.py redirects an upload to another destination based on the file extension
  • good example of the reloc hook effect
• reject-and-explain.py shows a custom error-message when it rejects an upload
• reject-ramdisk.py rejects the upload if the destination is a ramdisk
  • this hook uses the I flag which makes it 140x faster, but if the plugin has a bug it may crash copyparty

on message

• wget.py lets you download files by POSTing URLs to copyparty
  • wget-i.py is an import-safe modification of this hook (starts 140x faster, but higher chance of bugs)
• qbittorrent-magnet.py starts downloading a torrent if you post a magnet url
• usb-eject.py adds web-UI buttons to safe-remove usb flashdrives shared through copyparty
• msg-log.py is a guestbook; logs messages to a doc in the same folder

general concept demos

• import-me.py shows how the I flag makes the hook 140x faster (but you need to be Very Careful when writing the plugin)
  • wget-i.py is an import-safe modification of wget.py