PHP 简单实现webSocket

admin · 发表于 2018-10-27 12:35:15

1）客户端实现

<html>
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<head>( Q; C, v; O1 |1 M
<meta charset="UTF-8">
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<title>Web sockets test</title>
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<script src="jquery-min.js" type="text/javascript"></script># m, p! g' \& j
<script type="text/javascript">
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var ws;
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function ToggleConnectionClicked() { 8 o: Q, _( [% I( y* G# w
try {6 `, b- Z) U6 L+ _. ^
ws = new WebSocket("ws://127.0.0.1:2000");//连接服务器 ) ], | R; \! z% n2 M5 B4 Z
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);};
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ws.onmessage = function(event){alert("接收到服务器发送的数据：\r\n"+event.data);};
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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);};
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ws.onerror = function(event){alert("WebSocket异常！");};) f: ~! ^. n. ~& i& l8 Y
} catch (ex) {
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alert(ex.message); " z" e! X# W9 L0 R
}
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};/ l2 o5 u: u4 Q7 ^7 Z/ e- u
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function SendData() {
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try{$ y' f$ s9 Y' a# T( J3 W# p
var content = document.getElementById("content").value;# W* c9 u! A, q; `
if(content){9 _7 o t. |$ j5 X2 T0 C. f1 ?. _) [
ws.send(content);7 |; x4 f2 H# U
}
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}catch(ex){
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alert(ex.message);
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}
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};9 E# H6 m2 P( _6 `
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function seestate(){
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alert(ws.readyState);, m4 J6 h8 B* U
}
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</script>" r; ]% D2 t1 R9 b
</head>
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<body>
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<button id='ToggleConnection' type="button" onclick='ToggleConnectionClicked();'>连接服务器</button><br /><br />
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<textarea id="content" ></textarea>
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<button id='ToggleConnection' type="button" onclick='SendData();'>发送我的名字：beston</button><br /><br />6 |8 n. q, f8 L. Y y/ `
<button id='ToggleConnection' type="button" onclick='seestate();'>查看状态</button><br /><br />+ l! h5 b3 y. z' F+ r2 e5 _; M
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</body>. p1 X$ D; h. K( @/ Z
</html>
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2）服务器端实现

class WS {
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var $master; // 连接 server 的 client
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var $sockets = array(); // 不同状态的 socket 管理* Z. W. s5 _5 f2 ]# @' d" [
var $handshake = false; // 判断是否握手7 L$ G, s0 q) H5 f# H
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function __construct($address, $port){
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// 建立一个 socket 套接字
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$this->master = socket_create(AF_INET, SOCK_STREAM, SOL_TCP)
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or die("socket_create() failed");
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socket_set_option($this->master, SOL_SOCKET, SO_REUSEADDR, 1)
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or die("socket_option() failed");/ @0 y8 j) `+ P4 C, b
socket_bind($this->master, $address, $port)
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or die("socket_bind() failed");! g& P& h: v' p; l2 h7 d6 j2 f
socket_listen($this->master, 2)
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or die("socket_listen() failed");; [ m$ s- C5 [4 q* Z
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$this->sockets[] = $this->master;9 Y2 Q- f" _' I2 ~; v1 \% w
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// debug8 _ H( w" ?/ g) r" N5 p" m
echo("Master socket : ".$this->master."\n");$ D# A# t: w* \0 k
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while(true) {" n, d0 A) I d+ | v" M
//自动选择来消息的 socket 如果是握手自动选择主机9 D- ~3 P- t, ^6 C3 Y, q
$write = NULL;
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$except = NULL;
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socket_select($this->sockets, $write, $except, NULL);
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foreach ($this->sockets as $socket) {
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//连接主机的 client ' i8 b% u! n5 s1 A7 q4 _
if ($socket == $this->master){( T7 f' r0 K7 r) u
$client = socket_accept($this->master);/ p& E/ X( [) n" u5 j$ c
if ($client < 0) {
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// debug* C# ]$ M( L0 M" [$ S- h
echo "socket_accept() failed";
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continue;
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} else {
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//connect($client);
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array_push($this->sockets, $client);
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echo "connect client\n";3 ?- b! b5 q; @( Q. b9 M/ a4 V& u
}
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} else {: c. D4 |9 |2 ]) u
$bytes = @socket_recv($socket,$buffer,2048,0);
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print_r($buffer);! C2 B! S b9 ~( z7 k
if($bytes == 0) return;
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if (!$this->handshake) {) H) p+ e3 g0 o+ m$ A7 K, E
// 如果没有握手，先握手回应
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$this->doHandShake($socket, $buffer);/ F& J+ ~- `7 M2 V
echo "shakeHands\n";0 Z3 \7 R# \6 d8 c- D9 a* ?
} else {* ^' \: \) d" i% ]8 [
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// 如果已经握手，直接接受数据，并处理" x8 E* p4 ^: i# F
$buffer = $this->decode($buffer); E! T! a1 _* ]( I! n
//process($socket, $buffer);
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echo "send file\n";
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}
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function dohandshake($socket, $req)
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// 获取加密key
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$acceptKey = $this->encry($req);
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$upgrade = "HTTP/1.1 101 Switching Protocols\r\n" .
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"Upgrade: websocket\r\n" .
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"Connection: Upgrade\r\n" .
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"Sec-WebSocket-Accept: " . $acceptKey . "\r\n" .& z, \/ A5 l& g, v) o) h; T, I
"\r\n";
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echo "dohandshake ".$upgrade.chr(0); b1 r& Y/ n3 }0 u- `' k/ N
// 写入socket
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socket_write($socket,$upgrade.chr(0), strlen($upgrade.chr(0)));& Q. H: @9 r1 w+ g2 P
// 标记握手已经成功，下次接受数据采用数据帧格式( Y, m8 a7 r3 p' ]: V5 Y2 y% f
$this->handshake = true;+ z) x/ P0 r6 P9 X
}
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function encry($req)
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{
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$key = $this->getKey($req);
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$mask = "258EAFA5-E914-47DA-95CA-C5AB0DC85B11";& ?$ j g9 D- u) A" P5 f
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return base64_encode(sha1($key . '258EAFA5-E914-47DA-95CA-C5AB0DC85B11', true));
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function getKey($req)
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$key = null;
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if (preg_match("/Sec-WebSocket-Key: (.*)\r\n/", $req, $match)) {
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$key = $match[1];
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return $key;. I, A( P7 c8 W8 L8 a8 w
}
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// 解析数据帧, J: z/ M. Z0 E: [7 J: U& E3 O
function decode($buffer)
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$len = $masks = $data = $decoded = null;
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$len = ord($buffer[1]) & 127;
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if ($len === 126) {1 l1 O! c; c$ n3 g
$masks = substr($buffer, 4, 4);
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$data = substr($buffer, 8);
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} else if ($len === 127) {
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$masks = substr($buffer, 10, 4);, h9 c: [5 y# y! w# z# ~( \
$data = substr($buffer, 14);
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} else {% ? W! B6 f+ s. k4 M5 ~. w
$masks = substr($buffer, 2, 4);
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$data = substr($buffer, 6);
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for ($index = 0; $index < strlen($data); $index++) {; W4 a9 [% }, B/ H$ ~* G# b5 q
$decoded .= $data[$index] ^ $masks[$index % 4];( H- [1 Q4 o' m K8 v" S
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return $decoded;/ P* J0 I" h* n. S: |1 h
}
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// 返回帧信息处理
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function frame($s) ; E) }0 H3 _) Q, _) H6 Z5 e7 l
{
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$a = str_split($s, 125);
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if (count($a) == 1) {0 v0 R- z, l0 m
return "\x81" . chr(strlen($a[0])) . $a[0];
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}
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$ns = "";
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foreach ($a as $o) {
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$ns .= "\x81" . chr(strlen($o)) . $o;
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}
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return $ns;7 h- R9 A% F+ c& ?! k
}$ a2 i% A( K. G4 `8 s. n
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// 返回数据
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function send($client, $msg)' n# i, r; |: ]3 w1 }( g, O
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$msg = $this->frame($msg);
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socket_write($client, $msg, strlen($msg));5 V- J3 v" d! f! {0 u: v( \: M/ O6 K
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测试 $ws = new WS("127.0.0.1",2000);
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