Discord notification for OpenMediaVault

20discord

#!/bin/bash
#CREATED BY XMON FOR OpenMediaVault
DISCORD_WEBHOOK='PUT YOUR WEBHOOK LINK HERE'

generate_post_data() {
  cat <<EOF
{
  "content": "",
  "embeds": [{
    "title": "${OMV_NOTIFICATION_SUBJECT}",
    "description": "$(cat ${OMV_NOTIFICATION_MESSAGE_FILE})",
    "color": "45973",
    "footer": {
        "text": "${OMV_NOTIFICATION_DATE}",
        "icon_url": ""
    }
  }]
}
EOF
}

curl -H "Content-Type: application/json" -X POST -d "$(generate_post_data)" $DISCORD_WEBHOOK

If you want to show the output of a file or stdin in bash, and your file includes special characters such as backticks (`) and ", then you can't simply cat filename. You will need to properly escape special characters.

One of the easiest methods to output properly escaped text from a file is to use jq, cut, and rev

Prerequisites

[jq](https://stedolan.github.io/jq/) - Character escaping
[cut](https://linux.die.net/man/1/cut) - Cut characters from string (part of [coreutils](https://www.gnu.org/software/coreutils/coreutils.html), included by default on most systems)
[rev](https://linux.die.net/man/1/rev) - Reversing of characters (part of [util-linux](https://en.wikipedia.org/wiki/Util-linux), included by default on most systems)

Usage:
Simply pass filename to the following command to escape the file contents to stdout:

jq -Rs . <filename | cut -c 2- | rev | cut -c 2- | rev

So, instead of

$(cat ${OMV_NOTIFICATION_MESSAGE_FILE})

use this

$(jq -Rs . <${OMV_NOTIFICATION_MESSAGE_FILE} | cut -c 2- | rev | cut -c 2- | rev)

So the working bash script to put in /usr/share/openmediavault/notification/sink.d/20discord is here:

#!/bin/bash
DISCORD_WEBHOOK='PUT YOUR WEBHOOK LINK HERE'

generate_post_data() {
  cat <<EOF
{
  "content": "",
  "embeds": [{
    "title": "${OMV_NOTIFICATION_SUBJECT}",
    "description": "$(jq -Rs . <${OMV_NOTIFICATION_MESSAGE_FILE} | cut -c 2- | rev | cut -c 2- | rev)",
    "color": "45973",
    "footer": {
        "text": "${OMV_NOTIFICATION_DATE}",
        "icon_url": ""
    }
  }]
}
EOF
}

curl -H "Content-Type: application/json" -X POST -d "$(generate_post_data)" $DISCORD_WEBHOOK

@beppefiocco Tysm, your solution worked great.