Post messages to any channel from anywhere on the web! Just bring a token, channel ID, and something to say.

A few quick actions must happen before you're posting messages to your webhook. Feel free to follow along if you want!

After installing the Slack CLI, create the webhook with these commands:

$ slack create webhooked --template zimeg/slack-webhooked
$ cd webhooked
$ slack deploy

When prompted to create a trigger, select triggers/webhook_trigger.ts and hold on to the hooks.slack.com URL.

A service token from Slack is used to verify the webhook requests are valid. Gather this for your workspace with:

$ slack auth token

The payload sent with a request contains all of the information needed to post a messsage.

Update the payload.json file with your own information for the message:

{
  "token": "xoxp-example-token",
  "channel": "C0123456789",
  "message": "Wowza! Webhook magic!"
}

Now comes the moment of truth. Will the message send? I certainly hope so!

Send a POST request to the hooks.slack.com URL with your payload to send your message:

$ curl https://hooks.slack.com/triggers/T0123456789/31415926535897/6c0b3bdbbd5cde46d14184aa3fbbdbd7 -d "@payload.json"

Assuming everything went well, you should now find a new message in the channel you specified! Awesome stuff!

A token usually isn't necessary to hook onto a webhook but can be useful for authenticating requests. This app requires a token for the sake of example.

You can customize any validation logic in the functions/validate_function.ts file.

The auth.test method is currently used to check that the provided token matches some Slack identity and can be easily extended to compare the corresponding team_id or user_id.