我正在尝试将 Express (3.x) 与 NowJS(主要是 Socket.io 的包装器)结合起来创建一个实时应用程序,首先需要您登录。我承认我是 Node 新手,但我有很好地处理每个包如何单独工作。但是,从 NowJS 访问 Express Session 信息让我很适应。
问题似乎是因为我被迫使用 XHR-Polling(使用 Heroku 作为托管平台),我无法轻松访问 Socket.io 身份验证方法中的 cookie 信息。在下面的 authFunction 代码中,“data.headers.cookie”是未定义的。以一种迂回的方式(在 Now.js 代码中),这在 nowjs.on("connect",...) 回调中将“this.user.cookie”留空(但不是未定义)。这反过来又让我无法获取会话信息。
通过阅读,似乎只有使用 websockets 时 cookie 才可用。如果没有 cookie,除了为他们生成的随机标识符之外,我不知道哪个用户正在调用服务器。
谁能建议如何解决这个问题?在与 Now.js 服务器建立连接后,我是否需要从客户端手动发送 cookie?
var app = express();
app.configure(function(){
app.set('port', process.env.PORT || 3000);
app.set('views', __dirname + '/views');
app.engine('html', consolidate.swig);
app.set('view engine', 'html');
app.use(express.favicon());
app.use(express.logger('dev'));
app.use(express.bodyParser());
app.use(express.methodOverride());
app.use(express.cookieParser());
app.use(express.session({ secret: "secrethere" , store: sessionStore}));
app.use(express.static(path.join(__dirname, 'public')));
app.use(app.router);
});
app.configure('development', function(){
app.use(express.errorHandler({dumpExceptions: true, showStack: true}));
});
//Map the routes
var routes = require('./routes/routes')(db);
app.get[...] //routes defined here
var server = http.createServer(app, {cookieKey: 'connect.sid'});
server.listen(app.get('port'), function(){
console.log("Express server listening on port " + app.get('port'));
});
var parseCookie = require('express/node_modules/connect').utils.parseCookie;
var authFunction = function (data, accept) {
// check if there's a cookie header
if (data.headers.cookie) {
// if there is, parse the cookie
data.cookie = parseCookie(data.headers.cookie);
// note that you will need to use the same key to grad the
// session id, as you specified in the Express setup.
data.sessionID = data.cookie['connect.sid'];
} else {
// if there isn't, turn down the connection with a message
// and leave the function.
return accept('No cookie transmitted.', false);
}
// accept the incoming connection
accept(null, true);
};
var everyone = nowjs.initialize(server, {socketio: {transports: ['xhr-polling', 'jsonp-polling'], authorization: authFunction}});
nowjs.on('connect', function (socket) {
//TODO - This will need to be based on the URL that is being visited, or
//similar to establish that users are viewing the same thing
var sid = unescape(this.user.cookie["connect.sid"]); //# you DO have to unescape the session id!
sessionStore.get(sid, function(err, sess){
console.log("That group who joined? his userId is " + sess.userId)
});
var newRoom = "group";//this.user.session;//.groupName;
var newGroup = nowjs.getGroup(newRoom);
this.now.serverRoom = newRoom;
newGroup.addUser(this.user.clientId);
});
编辑:我当然更喜欢简单的解决方案,比如这里的最佳答案:Now.js 中的会话支持,但这对我不起作用(可能)出于同样的原因——我的“cookie”是空的并且不包含“连接” .sid”键。