socketio/engine.io v4.0.0-alpha.0

on GitHub

Features

• decrease the default value of maxHttpBufferSize (734f9d1)
• disable cookie by default and add sameSite attribute (a374471), closes /github.com/jshttp/cookie#options-1
• generateId method can now return a Promise (f3c291f)
• reverse the ping-pong mechanism (31ff875)
• use the cors module to handle cross-origin requests (61b9492)

BREAKING CHANGES

• the handlePreflightRequest option is removed by the change.

Before:

new Server({
  handlePreflightRequest: (req, res) => {
    res.writeHead(200, {
      "Access-Control-Allow-Origin": 'https://example.com',
      "Access-Control-Allow-Methods": 'GET',
      "Access-Control-Allow-Headers": 'Authorization',
      "Access-Control-Allow-Credentials": true
    });
    res.end();
  }
})

After:

new Server({
  cors: {
    origin: "https://example.com",
    methods: ["GET"],
    allowedHeaders: ["Authorization"],
    credentials: true
  }
})

• the syntax has changed from

new Server({
  cookieName: "test",
  cookieHttpOnly: false,
  cookiePath: "/custom"
})

to

new Server({
  cookie: {
    name: "test",
    httpOnly: false,
    path: "/custom"
  }
})

All other options (domain, maxAge, sameSite, ...) are now supported.

• v3.x clients will not be able to connect anymore (they will send a ping packet and timeout while waiting for a pong packet).

Links

• Diff: 3.4.0...v4.0.0-alpha.0
• Client release: v4.0.0-alpha.0
• ws version: ^7.1.2