使用Socket.IO-redis的socket.io :获取房间中的所有套接字对象

Question

我想要检索服务器端所有的套接字连接在一个房间。

我已经找到了方法clients，如果在方法in之后链接，则返回在一个房间中连接的所有套接字：

import * as express from 'express';
import * as SocketIO from 'socket.io';
import * as redisSocket from 'socket.io-redis';
import * as sharedsession from 'express-socket.io-session';

const app = express();

const redisOption = {port: 6379, host: 'XXX'};

// use the RedisStore as express session
const session = session({
  name: 'SESSIONID',
  store: new RedisStore(redisOption),
  secret: 'Ashg8hV77bxFeyLVec',
  resave: false,
  saveUninitialized: false
});
app.use(session);

// start express server
const httpServer = app.listen(80);

// attach the express app to socket.io server
const socketServer = SocketIO(httpServer, { path: '/api/socket.io', origins: '*:*' });

// set redis as socket adpter for multi instance/nodes
socketServer.adapter(redisSocket(redisOption));

// share the express session with socket.io
socketServer.use(sharedsession(session, {autoSave: true}));

// get all client in a room
socketServer.in(room_id).clients((err, clients) => {
    for (let i = 0, e = clients.length; i < e; i++) {
        const client = clients[i];
        console.log(client); // print the socket id

        // HOW RETRIVE THE SOCKET OBJECT???
    }
});

但是我需要检索所有的套接字会话/握手。

有一种方法可以检索所有套接字会话/握手吗？

侧记:套接字服务器是具有socket.io-redis的多实例/节点

• socket.io-redis：

• socket.io: 2.3.0

• 5.2.0

Answer 1

我不确定下面的代码是否有效，但是我认为通过使用socket.io-redis提供的customHook，我们可以得到基于redis的多节点的socket.handshake.session。

我希望下面的代码能有所帮助。

// get all client in a room
socketServer.in(room_id).clients((err, clients) => {
    for (let i = 0, e = clients.length; i < e; i++) {
        const client = clients[i];
        console.log(client); // print the socket id

        // HOW RETRIVE THE SOCKET OBJECT???
    }
});

// set root namespace
const rootNamespace = socketServer.of('/');

// define customHook
rootNamespace.adapter.customHook = (request, cb) => {
    // every socket.io server execute below, when customRequest requested
    const type = request.type;
    if(type === 'getHandShakeSession'){
        // get all socket objects on local socket.io server
        const sockets = rootNamespace.connected;
        const socketIDs = Object.keys(sockets);
        // get all socket.handshak.session array on local socket.io server
        const sessions = socketIDs.map(socketID => sockets[socketID].handshake.session);
        cb(sessions)
    }
    cb()
}

// request customRequest
rootNamespace.adapter.customRequest({type:'getHandShakeSession'},(err,replies) => {
    //replies are array which element was pushed by cb(element) on individual socket.io server
    //remove empty reply 
    const filtered = replies.filter(reply => reply !== undefined)
    // filtered seems like [[session1,session2,...],[sesssion3,session4,...],..]
    console.log(filtered)
} )

Answer 2

Object.keys(io.sockets.sockets)；它为您提供房间中所有连接的套接字。