如何与 Socket.IO 1.x 和 Express 4.x 共享会话? [英] How to share sessions with Socket.IO 1.x and Express 4.x?

问题描述

如何与 Socket.io 1.0 和 Express 4.x 共享会话?我使用 Redis 商店，但我认为这无关紧要.我知道我必须使用中间件来查看 cookie 和获取会话，但不知道如何.我搜索但找不到任何工作

How can I share a session with Socket.io 1.0 and Express 4.x? I use a Redis Store, but I believe it should not matter. I know I have to use a middleware to look at cookies and fetch session, but don't know how. I searched but could not find any working

    var RedisStore = connectRedis(expressSession);
    var session = expressSession({
        store: new RedisStore({
            client: redisClient
        }),
        secret: mysecret,
        saveUninitialized: true,
        resave: true
    });
    app.use(session);

    io.use(function(socket, next) {
        var handshake = socket.handshake;
        if (handshake.headers.cookie) {
            var str = handshake.headers.cookie;
            next();
        } else {
            next(new Error('Missing Cookies'));
        }
    });

推荐答案

解决方案出奇的简单.它只是没有很好的记录.也可以使用像这样的小适配器将 express 会话中间件用作 Socket.IO 中间件:

The solution is surprisingly simple. It's just not very well documented. It is possible to use the express session middleware as a Socket.IO middleware too with a small adapter like this:

sio.use(function(socket, next) {
    sessionMiddleware(socket.request, socket.request.res, next);
});

这是一个包含 express 4.x、Socket.IO 1.x 和 Redis 的完整示例:

Here's a full example with express 4.x, Socket.IO 1.x and Redis:

var express = require("express");
var Server = require("http").Server;
var session = require("express-session");
var RedisStore = require("connect-redis")(session);

var app = express();
var server = Server(app);
var sio = require("socket.io")(server);

var sessionMiddleware = session({
    store: new RedisStore({}), // XXX redis server config
    secret: "keyboard cat",
});

sio.use(function(socket, next) {
    sessionMiddleware(socket.request, socket.request.res || {}, next);
});

app.use(sessionMiddleware);

app.get("/", function(req, res){
    req.session // Session object in a normal request
});

sio.sockets.on("connection", function(socket) {
  socket.request.session // Now it's available from Socket.IO sockets too! Win!
});


server.listen(8080);

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