node.js - 如何与 Socket.IO 1.x 和 Express 4.x 共享 session ？

Question

如何与 Socket.io 1.0 和 Express 4.x 共享 session ？我使用 Redis Store，但我相信这不重要。我知道我必须使用中间件来查看 cookie 并获取 session ，但不知道如何。我搜索但找不到任何工作

    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'));
        }
    });

Answer 1

解决方案非常简单。它只是没有很好的记录。也可以将 express session 中间件用作 Socket.IO 中间件，并带有一个像这样的小适配器:

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

下面是 express 4.x、Socket.IO 1.x 和 Redis 的完整示例:

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);