如何在node.js和socket.io应用程序中组织套接字处理

Question

对于我的RESTapi，我为每个路由创建了一个文件。

app.get('/api/user', routes.user.index);
app.get('/api/user/login', routes.user.login);

等等。

现在我将socket.io引入后端，似乎我只能为所有套接字事件调用一个函数。

var socket = require('./socket/stuff.js');
io.sockets.on('connection', function(sock){
    socket.stuff(sock, io);
});

我应该如何分解./socket/stuff.js文件（它导出stuff）。放入单独的文件中。我希望最终用套接字替换RESTapi，但我不希望所有内容都在一个文件中。

我想我会有：

./socket/chat.js
./socket/user.js

等等。等等

Answer 1

要在不同的文件中组织事件处理程序，可以使用这样的结构：

/main.js

var io = require('socket.io');
var Chat = require('./EventHandlers/Chat');
var User = require('./EventHandlers/User');
var app = {
    allSockets: []
};
io.sockets.on('connection', function (socket) {
    // Create event handlers for this socket
    var eventHandlers = {
        chat: new Chat(app, socket),
        user: new User(app, socket)
    };
    // Bind events to handlers
    for (var category in eventHandlers) {
        var handler = eventHandlers[category].handler;
        for (var event in handler) {
            socket.on(event, handler[event]);
        }
    }
    // Keep track of the socket
    app.allSockets.push(socket);
});

/EventHandlers/Chat.js

var Chat = function (app, socket) {
    this.app = app;
    this.socket = socket;
    // Expose handler methods for events
    this.handler = {
        message: message.bind(this) // use the bind function to access this.app
        ping:    ping.bind(this)    // and this.socket in events
    };
}
// Events
function message(text) {
    // Broadcast message to all sockets
    this.app.allSockets.emit('message', text);
});
function ping() {
    // Reply to sender
    this.socket.emit('message', 'PONG!');
});
module.exports = Chat;

Answer 2

index.js

const httpServer = require("http").createServer();
const io = require("socket.io")(httpServer);
const registerOrderHandlers = require("./orderHandler");
const registerUserHandlers = require("./userHandler");
const onConnection = (socket) => {
  registerOrderHandlers(io, socket);
  registerUserHandlers(io, socket);
}
io.on("connection", onConnection);

orderHandler.js

module.exports = (io, socket) => {  const createOrder = (payload) => {    // ...  }
  const readOrder = (orderId, callback) => {    // ...  }
  socket.on("order:create", createOrder);  socket.on("order:read", readOrder);}

我是从文件中得到的。https://socket.io/docs/v4/server-application-structure/