服务端

Prerequisites

Once you have installed the Socket.IO server library, you can now init the server. The complete list of options can be found here.

The Server instance (often called io in the code examples) has a few attributes that may be of use in your application.

A Socket is the fundamental class for interacting with the client. It inherits all the methods of the Node.js EventEmitter, like emit, on, once or removeListener.

A middleware function is a function that gets executed for every incoming connection.

You will find below the configuration needed for deploying a Socket.IO server behind a reverse-proxy solution, such as:

When deploying multiple Socket.IO servers, there are two things to take care of:

Configuration

Registering event handlers

While less common than frontend bundling, it is totally possible to create a bundle for the server.