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Caddy plugin to filter and relay incoming WebHook requests to slack

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Caddy plugin to filter and relay incoming WebHook requests to slack

slack [endpoint] {
  url https://hooks.slack.com/services/ID/ID/TOKEN
  [only]
    [json.field.to.keep]
    [json.field.to.keep.as.well]
  [delete]
    [json.field.to.delete]
    [json.field.to.delete.as.well]
}

Examples

Full Example with ratelimit

ratelimit caddy plugin

slack /toSlack {
  url https://hooks.slack.com/services/ID/ID/TOKEN
  only
    text
}
ratelimit /toSlack 2 3

The endpoint /toSlack accepts 2 or 3 (with burst) POST requests per second. The json-body will be filtered for everything except text, and forwarded to https://hooks.slack.com/services/ID/ID/TOKEN

delete

Caddyfile

slack /toSlack {
  url https://hooks.slack.com/services/ID/ID/TOKEN
  delete
    attachments.title
}

A POST request to /toSlack with the following body

{
  "text": "Hello",
  "attachments": [
        {
            "title": "App hangs on reboot",
            "text": "If I restart my computer without quitting your app, it stops the reboot sequence.",
        }
    ]
}

will be forwarded to https://hooks.slack.com/services/ID/ID/TOKEN as

{
  "text": "Hello",
  "attachments": [
        {
            "text": "If I restart my computer without quitting your app, it stops the reboot sequence.",
        }
    ]
}

only

Caddyfile

slack /toSlack {
  url https://hooks.slack.com/services/ID/ID/TOKEN
  only
    text
    icon
}

A POST request to /toSlack with the following body

{
  "text": "Hello",
  "channel": "notallowed",
  "icon": "ghost"
}

will be forwarded to https://hooks.slack.com/services/ID/ID/TOKEN as

{
  "text": "Hello",
  "icon": "ghost"
}

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Caddy plugin to filter and relay incoming WebHook requests to slack

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