【发布时间】:2015-09-08 11:39:43
【问题描述】:
我正在使用带有 Express 的 socket.io。
假设用户点击了规范路由 /,请求被路由到:
app.get('/',function(req,res,next){
var msg =...;
socket.emit('channel',msg); //how do I find the right socket object that pertains to this HTTP request?
});
使用 socket.io 找到与此 HTTP 请求相关的套接字连接的最佳方法是什么?
我最好的猜测是在套接字连接被验证时用会话 id 标记套接字,然后稍后用相同的会话 id 检索它们(在上面的函数中)?会话 ID 在 Express 中间件中的请求对象上可用。
我还有这个代码将 socket.io 绑定到 Express 服务器:
var server = http.createServer(app).listen(port);
var io = require('socket.io').listen(server); //we need to bind socket.io to the http server
还有我自己的socketio模块,我这样做:
var cookie = require("cookie");
var connect = require("connect");
var io = null;
var connectedUsers = {}; //hash of sockets with socket.id as key and socket as value
var init = function ($io) {
if (io === null) {
io = $io;
io.use(function (socket, next) {
var handshakeData = socket.request;
if (handshakeData.headers.cookie && handshakeData.cookie) {
handshakeData.cookie = cookie.parse(handshakeData.headers.cookie);
//handshakeData.sessionID = connect.utils.parseSignedCookie(handshakeData.cookie['express.sid'], 'foo'); //pass session secret at end
handshakeData.sessionID = cookie.parse(handshakeData.cookie['express.sid'], 'foo'); //pass session secret at end
if (handshakeData.cookie['express.sid'] == handshakeData.sessionID) {
return next('Cookie is invalid.', false);
}
} else {
return next('No cookie transmitted.', false);
}
console.log('user with socket.id=', socket.id, 'has authenticated successfully.');
return next(null, true);
});
io.on('connection', function (socket) {
console.log('a user connected - ', socket.id);
connectedUsers[socket.id] = socket;
socket.on('chat message', function (msg) {
console.log(socket.id, 'says', msg);
socket.emit('chat message', 'hey baby hey - I am '.concat(socket.id));
});
socket.on('disconnect', function () {
console.log('user disconnected -', socket.id);
connectedUsers[socket.id] = null;
});
});
}
else if ($io != null) {
throw new Error('tried to re-init socketio.js by passing new value for io in?? what are you doing.')
}
else {
}
return {
addListener: function(){
}
};
module.exports = init;
【问题讨论】:
标签: node.js sockets express socket.io