npm install --save ws

//https://github.com/websockets/ws/blob/master/doc/ws.md#new-wsserveroptions-callback
var WebSocketServer = require('ws').Server,
  wss = new WebSocketServer({
    port: 3000, //监听接口
    verifyClient: socketVerify //可选，验证连接函数
  });
function socketVerify(info) {
  console.log(info.origin);
  console.log(info.req.t);
  console.log(info.secure);
  // console.log(info.origin);
  // var origin = info.origin.match(/^(:?.+\:\/\/)([^\/]+)/);
  //if (origin.length >= 3 && origin[2] == "blog.luojia.me") {
  //  return true; //如果是来自blog.luojia.me的连接，就接受
  //}
  // console.log("连接",origin[2]);
  return true; //否则拒绝
  //传入的info参数会包括这个连接的很多信息，你可以在此处使用console.log(info)来查看和选择如何验证连接
}
//广播
wss.broadcast = function broadcast(s,ws) {
  // console.log(ws);
  // debugger;
  wss.clients.forEach(function each(client) {
    // if (typeof client.user != "undefined") {
      if(s == 1){
        client.send(ws.name + ":" + ws.msg);
      }
      if(s == 0){
        client.send(ws + "退出聊天室");
      }
    // }
  });
};
// 初始化
wss.on('connection', function(ws) {
  // console.log(ws.clients.session);
  // console.log("在线人数", wss.clients.length);
  ws.send('你是第' + wss.clients.length + '位');
  // 发送消息
  ws.on('message', function(jsonStr,flags) {
    var obj = eval('(' + jsonStr + ')');
    // console.log(obj);
    this.user = obj;
    if (typeof this.user.msg != "undefined") {
      wss.broadcast(1,obj);
    }
  });
  // 退出聊天
  ws.on('close', function(close) {
    try{
      wss.broadcast(0,this.user.name);
    }catch(e){
      console.log('刷新页面了');
    }
  });
});

  
  
  
  
  
  



  

  
  
  
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