6.4.0

Features

• add support for Express middlewares (24786e7)

This commit implements middlewares at the Engine.IO level, because Socket.IO middlewares are meant for namespace authorization and are not executed during a classic HTTP request/response cycle.

A workaround was possible by using the allowRequest option and the "headers" event, but this feels way cleaner and works with upgrade requests too.

Syntax:

engine.use((req, res, next) => {
  // do something

  next();
});

// with express-session
import session from "express-session";

engine.use(session({
  secret: "keyboard cat",
  resave: false,
  saveUninitialized: true,
  cookie: { secure: true }
}));

// with helmet
import helmet from "helmet";

engine.use(helmet());

Links

• Diff: 6.3.1...6.4.0
• Client release: 6.4.0
• ws version: ~8.11.0 (no change)