sentry-optional-fallthrough-error-express.js

// An alternative fallback from https://docs.sentry.io/clients/node/integrations/express/#express

var app = require('express')();
var Raven = require('raven');

// Must configure Raven before doing anything else with it
Raven.config('__DSN__').install();

// The request handler must be the first middleware on the app
app.use(Raven.requestHandler());

app.get('/', function mainHandler(req, res) {
    throw new Error('Broke!');
});

// The error handler must be before any other error middleware
app.use(Raven.errorHandler());

// Optional fallthrough error handler
app.use(function onError(err, req, res, next) {
  // The error id is attached to `res.sentry` to be returned
  // and optionally displayed to the user for support.
  res.statusCode = 500;
  res.send(
    `Sorry! Something went wrong 💥. The maintainers have been notified, but if you'd like, you can <a href="https://github.com/jpnelson/fastjs/issues/new?title=Error%20in%20production&body=error_id=%22${
      res.sentry
    }%22">raise an issue on github</a> to give more details\n`
  );
  res.end();
});

app.listen(3000);