pleroma/installation/apache-cache-purge.sh.example

#!/bin/sh

# A simple shell script to delete a media from Apache's mod_disk_cache.
# You will likely need to setup a sudo rule like the following:
#
# Cmnd_Alias HTCACHECLEAN = /usr/local/sbin/htcacheclean
# pleroma ALL=HTCACHECLEAN, NOPASSWD: HTCACHECLEAN
#
# Please also ensure you have enabled:
#
# config :pleroma, Pleroma.Web.MediaProxy.Invalidation.Script, url_format: :htcacheclean
#
# which will correctly format the URLs passed to this script for the htcacheclean utility.
#

SCRIPTNAME=${0##*/}

# mod_disk_cache directory
CACHE_DIRECTORY="/tmp/pleroma-media-cache"

## Removes an item via the htcacheclean utility
## $1 - the filename, can be a pattern .
## $2 - the cache directory.
purge_item() {
    sudo htcacheclean -v -p "${2}" "${1}"
} # purge_item

purge() {
  for url in $@
  do
    echo "$SCRIPTNAME delete \`$url\` from cache ($CACHE_DIRECTORY)"
    purge_item "$url" $CACHE_DIRECTORY
  done
}

purge $@