exp2slack

You can use this to report errors to Slack from your node application, as an ExpressJs middleware or standalone library.

Get Your Slack Web Hook Url

1. set up a new application in slack
2. create a new Incoming Webhooks and get your SLACK_WEBHOOK_URL
3. npm i @kedoska/exp2slack --save or yarn add @kedoska/exp2slack

Use it as express middleware

See the example and make sure you are initializing this middleware AFTER all your app setup/routes. Also consider that when this is a middleware it will:

1. report the error to slack (wait for slack to reply)
2. call next passing the original error in the express pipeline. This will may slowdown your application (if it is firing a lot of errors).

const express = require('express') // <-- Step 1
const exp2slack = require('@kedoska/exp2slack')
const app = express()

const url = 'https://hooks.slack.com/services/XXXXXXXXX/XXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXX'

app.get('/', (req, res) => {
  const runTimeError = foo + bar  // <-- Step 3 ( foo not defined)
})

app.use((exp2slack(url))) // <-- Step 2

app.listen(8080)

More details about Express Error Handling available here

Now without express

Once you have initialized the IncomingWebhook with your url you can manually push an error to slack by calling the notify function. Here the example without express.

After passing the url to the configure method, you can notify any Error.

const { configure, notify } = require('@kedoska/exp2slack') // <-- Step 1
const url = 'https://hooks.slack.com/services/XXXXXXXXX/XXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXX'

configure(url) // <-- Step 2

const initApplication = () => {
  try {
    throw new Error('')
  } catch (err) {
    notify(err) // <-- Step 3
  }
}

initApplication()

Dependencies

1. error-stack-parser
2. node-slack-sdk (@slack/client)

Extra code and fancy If/s

:warning: I'm adding some extra if to the original output of error-stack-parser. Mainly to cut some paths and try to get a nice format in slack.