Question

这里我使用的是socket-io，并且每次重新加载它都会给我新的值（理想情况下它应该来自session并且应该相同）。你能指出原因吗？

var express = require('express');
var app = express();
var server = require('http').createServer(app);
var io = require('socket.io').listen(server);
var _ = require('lodash');
var q = require('q');

server.listen(3000);

var userCounter = 0;
    app.use(express.cookieParser());
    app.use(express.cookieSession({secret: 'secret', key: 'express.sid', cookie:{ path: '/', httpOnly: true, maxAge: (1000*3600*24)} }));
    app.use(express.static('public'))
   .use(function (req, res) {
        res.end('File not available\n');
    });

function getUserName(socket) {
    var deferred = q.defer();
    socket.get('userName', function (err, Name) {
        if (err || !Name) { // PROBLEM: It always goes in to this IF
            var userName = "Userno: " + (userCounter + 1);
            userCounter++;
            socket.set('userName', userName, function () {
                deferred.resolve(userName);
            });
        } else {
            deferred.resolve(Name);
        }
    });
    return deferred.promise;
}

io.sockets.on('connection', function (socket) {
    getUserName(socket).
        then(function (userName) {
            socket.emit("welcome", userName);
            _(io.sockets.sockets).forEach(function (eSocket) {
                if (socket !== eSocket)
                    eSocket.emit("userAdded", userName);
            });
            socket.on('disconnect', function () {
                socket.get('userName', function (err, userName) {
                    io.sockets.emit('userRem', userName);
                });
            });
        });

});

Answer 1

您尚未为socket.io实施任何会话身份验证。默认情况下，与socket.io的每个连接都是新连接，但它具有相同的cookie（cookie中的session_id）。 socket.io special option通过身份验证功能传递每个请求，如：

var sAuthorization = function(req, cb) {
    if ( req.headers.cookie ) { 
        cb(null, true); return; // We have cookie
    } else {
        cb(null, false); return; // We don't have cookie drop the connection
    };

var socket = require('socket.io').listen(app, { authorization: sAuthorization });

你应该做些什么来使它工作（我不会把它写成代码，因为需要进行大量的修改）：

实施为用户在快递中的初始http连接中提供名称（每个用户都应获得其唯一会话的用户名）;
实现sessionStore，可以通过express＆amp; amp; socket.io（请参阅this gist了解如何操作（它使用nowjs，但它是你必须查看的sessionStore代码）。实际上，如果你将sessionStore放在某个数据库中，而不是在你的MemoryStore。
让您的socket.io授权子进入此会话商店并获取用户名，然后照常将其作为此套接字的参数放置：socket.set('name', ....

差不多就是这样。它并不像听起来那么难，但这是正确的做法。

进一步阅读：

https://github.com/LearnBoost/Socket.IO/wiki/Configuring-Socket.IO
https://github.com/LearnBoost/socket.io/wiki/Authorizing

更新：

看看这个答案，它对你很有帮助 Securing Socket.io

更新II：

我在这里用代码https://gist.github.com/1b17fd2a7b324cb3411a

var express = require('express'),
    app = express(),
    http = require('http'),
    server = http.createServer(app),
    users = 0,
    MemoryStore = express.session.MemoryStore,
    sessionStore = new MemoryStore(),
    parseCookie = require('cookie').parse,
    utils = require('connect').utils,
    io = require('socket.io').listen(server);

app.use( express.bodyParser() );
app.use( express.cookieParser('secret') );
app.use( express.session({secret: 'secret', store:sessionStore}) );

app.get('/', function(req, res) {
    var user = req.session.username ? req.session.username : null;
    if ( !user ) {
        user = 'user_' + users++;
        req.session.username = user;
        req.session.save();
    }
    res.send('<!doctype html> \
        <html> \
        <head><meta charset="utf-8"></head> \
        <body> \
            <center>Welcome ' + user + '</center> \
            <script src="/socket.io/socket.io.js"></script> \
            <script> \
                var socket = io.connect(); \
                socket.emit("message", "Howdy"); \
            </script> \
        </body> \
        </html>');
});

io.configure(function () {
    io.set('authorization', function (request, callback) {
        var cookie = parseCookie(request.headers.cookie);
        if( !cookie && !cookie['connect.sid'] ) {
            return callback(null, false);
        } else {
            sessionStore.get(utils.parseSignedCookie(cookie['connect.sid'], 'secret'), function (err, session) {
                if ( err ) {
                    callback(err.message, false);
                } else {
                    if ( session && session.username ) {
                        request.user = session.username;
                        callback(null, true);
                    } else {
                        callback(null, false);
                    }
                }
            });
        }
    });
});

io.sockets.on('connection', function (socket) {
    socket.on('message', function(msg) {
        console.log(msg + 'from '+ socket.handshake.user);
    });
});

server.listen(8000);

为什么socket-io的get无法从持久会话中获取数据？

1 个答案:

更新：

更新II：