WebSocket handshake example

This example code demonstrates how a raw TCP/IP connection to an HTTP web server is upgraded into a WebSocket connection via an upgrade request.

In most cases this will be handled by a library so this is only to explain what is happening in the library.

wsserver.js

The wsserver.js script is an HTTP / websocket server that is used as the target host for the connection and upgrade example. It creates a web server that listens on port 8080 and has a simple "Hello world!" response if you open a web browser and open the URL http://localhost:8080.

Start the server:

node wsserver.js

client.js

The client.js script will create a raw TCP/IP socket connection to the host server and then send a request to upgrade the connection to a websocket.

Start client:

node client.js