NodeJS Express - Global Unique Request Id

Question

Is it possible to define a unique request Id that is included in each log statement without handing the logger to each method/function call?

Technologies in use: Nod

Answer 1

This answer has a problem: the counter goes back to 0 every time the node process is restarted. Turns out there is fairly simple to work around. You simply add an express middleware that tags each request called with a UUID using the uuid package.

For uuid Pre-2.0

const uuid = require('uuid');
const app = express();
app.use(function (req, next) {
  req.id = uuid.v4();
  next();
});

For uuid 3.0+

const uuidv4 = require('uuid/v4');
const app = express();
app.use(function (req, next) {
  req.id = uuidv4();
  next();
});