Socket.io识别套接字的用户 [英] Socket.io Identify User for Socket

问题描述

我写了一些代码示例，通过socket.io识别连接用户...所以现在我必须在索引页面上编写一个代码来与用户通信。

I write some code example that identifi connected users via socket.io... So now I must write a code on index page to comunicate with users.

代码在下面，如何向用户[1]欢迎和用户[2]HI men发送消息，并限制连接fr 2用户。所以当2个用户连接时，其他任何人都无法连接..

The code is below and HOW to send a message to user[1] "Welcome" and for user[2] "HI men" and also limit connection fr 2 users. so when 2 user connected then anybody else cant connect..

Index.html：

Index.html:

<script src="/socket.io/socket.io.js"></script>
<script>
  var socket = io.connect();
  var users;
  socket.on('hello', function (data) {
    console.log(data.hello);
  });
  socket.on('listing', function (data) {
     users = data; 
  });
  socket.on('chat', function (message) {
     console.log(message); 
  });
  socket.on('message', function (message) {
     console.log(message); 
  });
  function chat (message) {
    socket.emit('chat', message);   
  }
  function message (user, message) {
    socket.emit('message', {
       user: user,
       message: message
    });
  }
</script>

app.js

var express = require('express');
var app = express.createServer();
var io = require('socket.io').listen(app);

app.listen(3000);

app.use(express.static(__dirname));

var users = {};
var userNumber = 1;

function getUsers () {
   var userNames = [];
   for(var name in users) {
     if(users[name]) {
       userNames.push(name);  
     }
   }
   return userNames;
}

io.sockets.on('connection', function (socket) {
  var myNumber = userNumber++;
  var myName = 'user#' + myNumber;
  users[myName] = socket;

  socket.emit('hello', { hello: myName });
  io.sockets.emit('listing', getUsers());

  socket.on('chat', function (message) {
    io.sockets.emit('chat', myName + ': ' + message);
  });
  socket.on('message', function (data) {
     users[data.user].emit('message', myName + '-> ' + data.message); 
  });

  socket.on('disconnect', function () {
    users[myName] = null;
    io.sockets.emit('listing', getUsers());
  });
});

app.listen(process.env.PORT);

推荐答案

你可以先来看看如何< a href =https://github.com/LearnBoost/socket.io/wiki/Authorizing =nofollow noreferrer>使用Socket.io配置授权。可以在那里修改回调提供的 handshakeData （即：添加用户名属性），任何更改都可以通过 socket.handshake （通过传递给 io.sockets.on（'connection'，.. ）回调的对象。使用请求标头也可以从handshakeData访问的信息，您可以在授权回调中设置用户值（即：从数据库中），这样您就可以在app.js中识别给定套接字的用户。

You can start by taking a look at how to configure authorization with Socket.io. The handshakeData provided by the callback can be modified there (ie: add a username property), and any changes will be accessible via socket.handshake in your app.js (via the object passed in to the callback for io.sockets.on('connection',..). Using request header information that's also accessible from the handshakeData, you can set user values within the authorization callback (ie: from a database) so you can identify the user for the given socket in your app.js.

这是一个类似的例子

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