Express - socket.io - 阅读会话 [英] Express - socket.io - reading session

问题描述

我使用 express 和 socket.io.

I use express and socket.io.

当您使用快递创建会话时.单击该按钮并使用 Ajax 和 POST 方法(登录)，我保存了一个会话.

When you create a session with the express - post. Click the button and using Ajax and the POST method (login), I save a session.

 app.post('/login', function(req, res){
         req.session.loginid = req.body.lgnid;
    });

在socket.io中无法读取.

In socket.io it can not read.

谢谢你的建议.

我的源代码.:

var express = require('express');
var app = express.createServer();
var io = require('socket.io').listen(app); 
var MemoryStore = express.session.MemoryStore;
var sessionStore = new MemoryStore();
var parseCookie = require('connect').utils.parseCookie;
var Session = require('connect').middleware.session.Session;
var stylus = require('stylus');
  app.use(express.bodyParser());
  app.use(express.cookieParser());
  app.use(express.session({store: sessionStore
        , secret: 'secret'
        , key: 'express.sid'}));

  app.use(stylus.middleware({ src: __dirname + '/public', compile: compile }))
  app.use(express.static(__dirname + '/public'));
  app.set('views', __dirname);

 // disable layout
  app.set("view options", {layout: false});

  // make a custom html template
  app.register('.html', {
    compile: function(str, options){
      return function(locals){
        return str;
      };
    }
  });

  function compile (str, path) {
    return stylus(str)
      .set('filename', path)
      .use(nib());
  };

var Session = require('connect').middleware.session.Session;
sio.set('authorization', function (data, accept) {
    if (data.headers.cookie) {
        data.cookie = parseCookie(data.headers.cookie);
        data.sessionID = data.cookie['express.sid'];
        // save the session store to the data object 
        // (as required by the Session constructor)
        data.sessionStore = sessionStore;
        sessionStore.get(data.sessionID, function (err, session) {
            if (err || !session) {
                accept('Error', false);
            } else {
                // create a session object, passing data as request and our
                // just acquired session data
                data.session = new Session(data, session);
                accept(null, true);
            }
        });
    } else {
       return accept('No cookie transmitted.', false);
    }
});

如何从 sessionStore 加载和保存数据?

io.sockets.on('connection', function (socket) {

    var hs = socket.handshake;
    console.log('Session : ' + hs.session.loginid + '); //Session : undefined

});

推荐答案

实现这一点的推荐方法(至少在我的经验中)是放弃 sessionStore.get 函数并使用 sessionStore.load 而不是 - 不同之处在于加载回调被赋予一个会话实例，而不必自己创建一个.不同之处在于您的代码片段:

A recommended way to achieve this actually (at least in my experience) is to forgo the sessionStore.get function and go for sessionStore.load instead - the difference is that with load the callback is given a session instance instead of having to create one yourself. The difference is simply taking your snippet:

sessionStore.get(data.sessionID, function (err, session) {
    if (err || !session) {
        accept('Error', false);
    } else {
        // create a session object, passing data as request and our
        // just acquired session data
        data.session = new Session(data, session);
        accept(null, true);
    }
});

并将其更改为:

sessionStore.load(data.sessionID, function(err, session) {
  if (err || !session) {
    accept("Error", false);
  } else {
    data.session = session;
    accept(null, true);
  }
});

从那里开始，您应该能够在尝试时访问会话，例如 socket.handshake.session，但是在处理会话时，如果您对套接字事件进行更改，则自己手动保存会话.如果您添加/删除内容，您必须:session.save([callback]).

And from there, you should be able to access the session as you attempt, such as socket.handshake.session, however when dealing with the session if you make changes in a socket event you have to manually save the session yourself. If you add/remove things you must: session.save([callback]).

我意识到这不是一个很好的答案，因为我告诉你大致做你已经做的事情，但这对我现在使用 Express 2.5.8 和 Socket.IO0.9.6.

I realize this isn't much of an answer since I'm telling you to do roughly what you already are but this is working for me right now with Express 2.5.8 and Socket.IO 0.9.6.

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