Preliminary study on Socket.io

Establishing the server

//server.js
varIO = require (' Socket.io ') (80);varChat =io. of ('/chat ')//Set namespace. On (' Connection ',function(socket) {Socket.emit (' A message ', {// this will only be sent to its own socket that:' Only '      , '/chat ': ' would get '    }); Chat.emit (' A message ', {// global send everyone:' In '      , '/chat ': ' would get '    }); });varNews =io. of ('/news '). On (' Connection ',function(socket) {Socket.emit (' Item ', {news: ' Item ' }); });

<script>  var chat = io.connect (' http://localhost/chat ')  // /chat/news Here is the namespace, It doesn't matter    with the URL . = Io.connect (' http://localhost/news ');//can also be directly IO (), which will connect Chat.on based on your current URL    ( function () {    chat.emit (' hi! ' );  });    News.on (function  () {    news.emit (' woot ');  }); </script>

Send Receipts

Server.js
var io = require (' Socket.io '),io.on (function  (socket) {  Socket.on (  function  (name, fn) {    fn (' woot ');  });});

Client.js

<script>  var//  Tip:io () with no args does auto-discovery  function // tip:you can avoid listening on ' connect ' and listen on events directly too!    function (data) {   ///emit function The third optional parameter is a callback function, which can have parameters, the call of the parameter is determined      by the server //  data Will is ' Woot '    })  ; </script>

Set the Sending object

// Send yourself socket.broadcase.emit ()  // Send to users outside of themselves Io.emit ()  // Send all Users io.of ()/io.to ()/  / users sending namespaces/rooms

Preliminary study on Socket.io