PHP 简单实现webSocket

费话少说,用源代码说话

    1)客户端实现

  

 1 <html>
 2 <head>
 3     <meta charset="UTF-8">
 4     <title>Web sockets testtitle>
 5     <script src="jquery-min.js" type="text/javascript">script>
 6     <script type="text/javascript">
 7         var ws;
 8         function ToggleConnectionClicked() {          
 9                 try {
10                     ws = new WebSocket("ws://127.0.0.1:2000");//连接服务器        
11                     ws.onopen = function(event){alert("已经与服务器建立了连接\r\n当前连接状态:"+this.readyState);};
12                     ws.onmessage = function(event){alert("接收到服务器发送的数据:\r\n"+event.data);};
13                     ws.onclose = function(event){alert("已经与服务器断开连接\r\n当前连接状态:"+this.readyState);};
14                     ws.onerror = function(event){alert("WebSocket异常!");};
15                 } catch (ex) {
16                     alert(ex.message);      
17                 }
18         };
19  
20         function SendData() {
21             try{
22                 var content = document.getElementById("content").value;
23                 if(content){
24                     ws.send(content);
25                 }
26                 
27             }catch(ex){
28                 alert(ex.message);
29             }
30         };
31  
32         function seestate(){
33             alert(ws.readyState);
34         }
35        
36     script>
37 head>
38 <body>
39    <button id='ToggleConnection' type="button" onclick='ToggleConnectionClicked();'>连接服务器button><br /><br />
40    <textarea id="content" >textarea>
41     <button id='ToggleConnection' type="button" onclick='SendData();'>发送我的名字:bestonbutton><br /><br />
42     <button id='ToggleConnection' type="button" onclick='seestate();'>查看状态button><br /><br />
43 
44 body>
45 html>

 2)服务器端实现

  1  class WS {
  2     var $master;  // 连接 server 的 client
  3     var $sockets = array(); // 不同状态的 socket 管理
  4     var $handshake = false; // 判断是否握手
  5 
  6     function __construct($address, $port){
  7         // 建立一个 socket 套接字
  8         $this->master = socket_create(AF_INET, SOCK_STREAM, SOL_TCP)   
  9             or die("socket_create() failed");
 10         socket_set_option($this->master, SOL_SOCKET, SO_REUSEADDR, 1)  
 11             or die("socket_option() failed");
 12         socket_bind($this->master, $address, $port)                    
 13             or die("socket_bind() failed");
 14         socket_listen($this->master, 2)                               
 15             or die("socket_listen() failed");
 16 
 17         $this->sockets[] = $this->master;
 18 
 19         // debug
 20         echo("Master socket  : ".$this->master."\n");
 21 
 22         while(true) {
 23             //自动选择来消息的 socket 如果是握手 自动选择主机
 24             $write = NULL;
 25             $except = NULL;
 26             socket_select($this->sockets, $write, $except, NULL);
 27 
 28             foreach ($this->sockets as $socket) {
 29                 //连接主机的 client 
 30                 if ($socket == $this->master){
 31                     $client = socket_accept($this->master);
 32                     if ($client < 0) {
 33                         // debug
 34                         echo "socket_accept() failed";
 35                         continue;
 36                     } else {
 37                         //connect($client);
 38                         array_push($this->sockets, $client);
 39                         echo "connect client\n";
 40                     }
 41                 } else {
 42                     $bytes = @socket_recv($socket,$buffer,2048,0);
 43                     print_r($buffer);
 44                     if($bytes == 0) return;
 45                     if (!$this->handshake) {
 46                         // 如果没有握手,先握手回应
 47                         $this->doHandShake($socket, $buffer);
 48                         echo "shakeHands\n";
 49                     } else {
 50                     
 51                         // 如果已经握手,直接接受数据,并处理
 52                         $buffer = $this->decode($buffer);
 53                         //process($socket, $buffer); 
 54                         echo "send file\n";
 55                     }
 56                 }
 57             }
 58         }
 59     }
 60     
 61     function dohandshake($socket, $req)
 62     {
 63         // 获取加密key
 64         $acceptKey = $this->encry($req);
 65         $upgrade = "HTTP/1.1 101 Switching Protocols\r\n" .
 66                    "Upgrade: websocket\r\n" .
 67                    "Connection: Upgrade\r\n" .
 68                    "Sec-WebSocket-Accept: " . $acceptKey . "\r\n" .
 69                    "\r\n";
 70 
 71         echo "dohandshake ".$upgrade.chr(0);           
 72         // 写入socket
 73         socket_write($socket,$upgrade.chr(0), strlen($upgrade.chr(0)));
 74         // 标记握手已经成功,下次接受数据采用数据帧格式
 75         $this->handshake = true;
 76     }
 77     
 78     
 79     function encry($req)
 80     {
 81         $key = $this->getKey($req);
 82         $mask = "258EAFA5-E914-47DA-95CA-C5AB0DC85B11";
 83 
 84         return base64_encode(sha1($key . '258EAFA5-E914-47DA-95CA-C5AB0DC85B11', true));
 85     }
 86     
 87     function getKey($req) 
 88     {
 89         $key = null;
 90         if (preg_match("/Sec-WebSocket-Key: (.*)\r\n/", $req, $match)) { 
 91             $key = $match[1]; 
 92         }
 93         return $key;
 94     }
 95     
 96     // 解析数据帧
 97     function decode($buffer)  
 98     {
 99         $len = $masks = $data = $decoded = null;
100         $len = ord($buffer[1]) & 127;
101 
102         if ($len === 126)  {
103             $masks = substr($buffer, 4, 4);
104             $data = substr($buffer, 8);
105         } else if ($len === 127)  {
106             $masks = substr($buffer, 10, 4);
107             $data = substr($buffer, 14);
108         } else  {
109             $masks = substr($buffer, 2, 4);
110             $data = substr($buffer, 6);
111         }
112         for ($index = 0; $index < strlen($data); $index++) {
113             $decoded .= $data[$index] ^ $masks[$index % 4];
114         }
115         return $decoded;
116     }
117     
118     // 返回帧信息处理
119     function frame($s) 
120     {
121         $a = str_split($s, 125);
122         if (count($a) == 1) {
123             return "\x81" . chr(strlen($a[0])) . $a[0];
124         }
125         $ns = "";
126         foreach ($a as $o) {
127             $ns .= "\x81" . chr(strlen($o)) . $o;
128         }
129         return $ns;
130     }
131 
132     // 返回数据
133     function send($client, $msg)
134     {
135         $msg = $this->frame($msg);
136         socket_write($client, $msg, strlen($msg));
137     }
138 }

测试  $ws = new WS("127.0.0.1",2000);

 PHP 简单实现webSocket_第1张图片                                                PHP 简单实现webSocket_第2张图片

转载于:https://www.cnblogs.com/LXJ416/p/5629038.html

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