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>
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<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>
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<script type="text/javascript">
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var ws;
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function ToggleConnectionClicked() {
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try {1 |1 H# i! A" ?9 p
ws = new WebSocket("ws://127.0.0.1:2000");//连接服务器 - }9 A8 T- e3 g6 M
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！");};% m( b/ x8 G) `
} catch (ex) {
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alert(ex.message);
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}" ]4 u# Z5 H8 Q% L2 p3 Z
};' G/ z, i0 O% p/ R
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function SendData() {
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try{
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var content = document.getElementById("content").value;6 I! T6 s l8 m, t$ Y( R0 \0 }
if(content){5 [/ V7 G W7 M$ L" K
ws.send(content);
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}
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}catch(ex){/ z" J5 Z- D$ w4 b5 F$ W) `
alert(ex.message);
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}
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};
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function seestate(){8 ^! v0 a. Q5 R L4 t
alert(ws.readyState);$ A; b j4 L2 c
}) _3 B8 E8 {6 @$ q; ]8 t( C8 v: S
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</script>
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<body>, W% e8 [' [1 ?, E% ]- b
<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 />' l' {) o% A. b* m
<button id='ToggleConnection' type="button" onclick='seestate();'>查看状态</button><br /><br />
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</body>
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</html>
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复制代码

2）服务器端实现

class WS {) Z, R( r1 @4 F, v' r% ~& R! W
var $master; // 连接 server 的 client
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var $sockets = array(); // 不同状态的 socket 管理
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var $handshake = false; // 判断是否握手$ s; v* \) U* m' K+ P; [) O
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function __construct($address, $port){, n. {: X0 X, c6 U+ Q* c
// 建立一个 socket 套接字3 B0 k8 o d) q7 c6 x+ T
$this->master = socket_create(AF_INET, SOCK_STREAM, SOL_TCP)
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or die("socket_create() failed");
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socket_set_option($this->master, SOL_SOCKET, SO_REUSEADDR, 1) 5 E8 c I; D6 ^7 j2 P* W" `
or die("socket_option() failed");4 p9 q4 N8 O6 l- E2 e3 o8 l
socket_bind($this->master, $address, $port)
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or die("socket_bind() failed");' |# i8 H3 h7 D, p
socket_listen($this->master, 2) : T7 `4 W8 k9 @
or die("socket_listen() failed");& ]& Z6 T9 m3 T5 m z7 l# Z
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$this->sockets[] = $this->master;% |+ }, w5 `, Q# ]9 L& u& [- d. z" ~" F
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// debug5 Y0 Y* G( N, _0 ~+ t0 s
echo("Master socket : ".$this->master."\n");
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while(true) {" u+ i6 m/ R5 J* P! f6 h
//自动选择来消息的 socket 如果是握手自动选择主机$ g2 M8 S3 s3 G* S$ V
$write = NULL;) I7 Z) ?: r. |% u- l+ |/ O8 m2 n3 j
$except = NULL;/ ?3 ]( D1 V( @" y' Y- e
socket_select($this->sockets, $write, $except, NULL);
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foreach ($this->sockets as $socket) {
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//连接主机的 client
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if ($socket == $this->master){ L# {6 K1 n8 p, U# Z
$client = socket_accept($this->master);" K( F3 \2 e. c* ]( p
if ($client < 0) {) ~4 s: W% i+ K/ b# x
// debug
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echo "socket_accept() failed";$ e8 {% k: i k3 R5 Y
continue;1 G0 h7 q. c% f# M% G
} else {. r! l: d! |- z, i# E
//connect($client);
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array_push($this->sockets, $client);
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echo "connect client\n";
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} else {
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$bytes = @socket_recv($socket,$buffer,2048,0);
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print_r($buffer);
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if($bytes == 0) return;) k4 X ?9 x/ H/ P
if (!$this->handshake) {& {9 V- x+ O6 n" k. f) H6 U
// 如果没有握手，先握手回应/ q! X7 E3 }+ q3 n6 A/ M9 V
$this->doHandShake($socket, $buffer); }: k2 ^. `6 \7 X$ ~& n
echo "shakeHands\n";
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} else {
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// 如果已经握手，直接接受数据，并处理2 Q A9 N3 z ]( ]4 r' S
$buffer = $this->decode($buffer);
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//process($socket, $buffer); 2 c4 h/ R8 b* ?! n% a- x7 z
echo "send file\n";
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}
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}
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}
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}
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function dohandshake($socket, $req)
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{
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// 获取加密key
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$acceptKey = $this->encry($req);
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$upgrade = "HTTP/1.1 101 Switching Protocols\r\n" .; G9 O+ T' n- H* I* G4 Q6 N' A H* h
"Upgrade: websocket\r\n" .
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"Connection: Upgrade\r\n" .
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"Sec-WebSocket-Accept: " . $acceptKey . "\r\n" ." y. ?' X0 w9 a5 Y& @
"\r\n";
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echo "dohandshake ".$upgrade.chr(0); * B6 g( v1 m6 h1 G
// 写入socket
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socket_write($socket,$upgrade.chr(0), strlen($upgrade.chr(0)));
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// 标记握手已经成功，下次接受数据采用数据帧格式
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$this->handshake = true;
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function encry($req)
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$key = $this->getKey($req);
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$mask = "258EAFA5-E914-47DA-95CA-C5AB0DC85B11";( } a2 g! {5 h% b& G4 ?
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return base64_encode(sha1($key . '258EAFA5-E914-47DA-95CA-C5AB0DC85B11', true));* z! t/ O' v" ?- L$ k
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function getKey($req) 2 L! ^6 B, a0 E7 g" E8 \) f' M+ V
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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 = $match[1]; 6 j6 V) A: M2 L1 q* _! |/ Y$ S
}
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return $key;
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}
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// 解析数据帧
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function decode($buffer)
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$len = $masks = $data = $decoded = null;
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$len = ord($buffer[1]) & 127;2 o. ?0 M& C+ A
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if ($len === 126) {
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$masks = substr($buffer, 4, 4);: `* S' @3 D; s9 E9 J/ H5 \ r
$data = substr($buffer, 8);
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} else if ($len === 127) { B6 o/ O9 y; s2 `, a
$masks = substr($buffer, 10, 4);/ S7 C6 s7 Z) i
$data = substr($buffer, 14);
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} else {9 i9 [1 I0 s" F" [; i- ^8 K) N( C
$masks = substr($buffer, 2, 4);
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$data = substr($buffer, 6);
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for ($index = 0; $index < strlen($data); $index++) {
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$decoded .= $data[$index] ^ $masks[$index % 4];
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}
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return $decoded;
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// 返回帧信息处理$ y) M4 d2 U4 F c. _% e p
function frame($s)
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$a = str_split($s, 125);
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if (count($a) == 1) {
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return "\x81" . chr(strlen($a[0])) . $a[0];( g1 _/ f0 X2 d3 S/ A( Y% q
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$ns = "";
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foreach ($a as $o) {
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$ns .= "\x81" . chr(strlen($o)) . $o;/ J- c' F# }9 }4 l C) N6 O
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return $ns;
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}
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// 返回数据
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function send($client, $msg)
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$msg = $this->frame($msg);& r8 L" I, x5 V8 q7 \
socket_write($client, $msg, strlen($msg));" D( {/ l, g. ?1 ?; ~. H' R
}
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测试 $ws = new WS("127.0.0.1",2000);8 n+ _$ s. e* a: f
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复制代码

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