PHP 简单实现webSocket

admin · 发表于 2018-10-27 12:35:15

1）客户端实现

<html>4 c5 x+ ]% e" _% |7 h
<head>% D5 L a( R6 N& U( r
<meta charset="UTF-8">$ F- }- [% e( Z- K4 u. _9 o# n
<title>Web sockets test</title>
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<script src="jquery-min.js" type="text/javascript"></script>1 m& I( s3 d7 z! A( o
<script type="text/javascript">8 T) p/ I( G' O5 u1 r j& |
var ws;
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function ToggleConnectionClicked() { - l& e, b& U9 q, I( v$ F( n
try {& h4 _* B4 h' e& A% g- a* r$ ?0 A
ws = new WebSocket("ws://127.0.0.1:2000");//连接服务器
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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);};- N* \4 g6 X3 g
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$ j6 K) R& X% q% x+ i1 V+ s
} catch (ex) {
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alert(ex.message); 5 {, B: Q j4 s$ l5 b Q: d6 X' Z1 A
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};
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function SendData() {+ ~& d; F1 Z0 o: q# E3 ?& j
try{
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var content = document.getElementById("content").value;
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if(content){
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ws.send(content);0 n8 m( t7 _& Q+ y0 \" s2 q
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}catch(ex){
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alert(ex.message);
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};; Y) x* Q; i4 L+ x! V3 ?3 f
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function seestate(){( {1 e8 e9 u& d
alert(ws.readyState);+ G' Y1 @7 a6 |/ I6 e8 w& ?
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</script>
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</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 />) [1 L( Y6 \" l7 i+ ~
<button id='ToggleConnection' type="button" onclick='seestate();'>查看状态</button><br /><br />
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</body># M# |+ v9 E" D) Y2 M
</html> ]2 |( w; Z& Y

复制代码

2）服务器端实现

class WS {0 ^+ W, F5 Y, y
var $master; // 连接 server 的 client! {1 i+ e" X1 z0 s, Y1 _/ H, S
var $sockets = array(); // 不同状态的 socket 管理 Q% o) V0 G1 r
var $handshake = false; // 判断是否握手0 q: f, ~7 V3 f$ P x1 ?* q: ^- R
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function __construct($address, $port){( ]+ @3 i+ g- V0 d5 s) e# G& \$ u
// 建立一个 socket 套接字% ~* O: |9 C8 ]+ d
$this->master = socket_create(AF_INET, SOCK_STREAM, SOL_TCP) & g1 e! c8 ]' `# r; ]
or die("socket_create() failed");: M6 T& d$ J3 d
socket_set_option($this->master, SOL_SOCKET, SO_REUSEADDR, 1) 9 p- J" @* m; H n+ a7 @
or die("socket_option() failed");# z- ` R: |; T$ d$ n
socket_bind($this->master, $address, $port)
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or die("socket_bind() failed");
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socket_listen($this->master, 2)
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or die("socket_listen() failed");; w* F) Q$ l' X" z" }/ \4 l$ ]" w
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$this->sockets[] = $this->master;3 v1 G, T! }: {. E1 o
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// debug6 ]. }4 c% y' ?6 F/ i: H+ ^
echo("Master socket : ".$this->master."\n");
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while(true) {
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//自动选择来消息的 socket 如果是握手自动选择主机( A/ Y6 \% u3 c* }( t: ]/ `
$write = NULL;
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$except = NULL;
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socket_select($this->sockets, $write, $except, NULL);9 R- T+ O! j+ ]0 j- l0 I' {2 l) U& _
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foreach ($this->sockets as $socket) {5 z6 o& a9 I& m; i
//连接主机的 client , |* J! h7 Y3 d0 n$ K3 ?% H: H
if ($socket == $this->master){
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$client = socket_accept($this->master);9 c6 B3 N& i$ w
if ($client < 0) {+ e: d1 o& ]# S- _% }% z0 D, {
// debug5 e: y1 S. R6 I% S9 H9 O" G) X$ K
echo "socket_accept() failed";
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continue; ]6 r1 j% g5 K! A2 }
} else {
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//connect($client);% R# n& S, J( o$ h: O) B- U. @. W, f
array_push($this->sockets, $client);. U; m9 N, a0 k$ F, o& a
echo "connect client\n";
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} else {
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$bytes = @socket_recv($socket,$buffer,2048,0);3 j3 O3 W5 S6 W' S. B6 t& K" H7 ]
print_r($buffer);
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if($bytes == 0) return;3 \3 i) p; K) ?8 ]
if (!$this->handshake) {* U1 Q1 `; B7 @" S: C8 t5 E
// 如果没有握手，先握手回应$ o2 q4 l! P6 l- ]4 ?
$this->doHandShake($socket, $buffer);
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echo "shakeHands\n";2 C) e/ ` p6 W% T* j: h$ G
} else { J' p/ m; a$ j& P8 w6 U
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// 如果已经握手，直接接受数据，并处理
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$buffer = $this->decode($buffer);; k% b( U" `4 O {$ l
//process($socket, $buffer);
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echo "send file\n";
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}
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}
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}
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function dohandshake($socket, $req)
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// 获取加密key
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$acceptKey = $this->encry($req);' E* c. B1 d6 [! R/ x
$upgrade = "HTTP/1.1 101 Switching Protocols\r\n" .
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"Upgrade: websocket\r\n" .3 K7 F, ]/ {2 E/ G8 h2 b% m4 s' @
"Connection: Upgrade\r\n" .: D* V* W: X3 j7 f/ J4 M& O
"Sec-WebSocket-Accept: " . $acceptKey . "\r\n" .
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"\r\n";9 S3 M7 i9 K/ J8 G5 j
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echo "dohandshake ".$upgrade.chr(0); - E5 F; B) M# q
// 写入socket; b9 c2 I# f% d. Y/ p. S' v
socket_write($socket,$upgrade.chr(0), strlen($upgrade.chr(0)));% d; l0 |1 _1 _0 [
// 标记握手已经成功，下次接受数据采用数据帧格式
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$this->handshake = true;
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function encry($req)" f+ E! _& n& G# s+ Z& S Y
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$key = $this->getKey($req);' [& t, }5 S1 A2 U% j$ [
$mask = "258EAFA5-E914-47DA-95CA-C5AB0DC85B11";
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return base64_encode(sha1($key . '258EAFA5-E914-47DA-95CA-C5AB0DC85B11', true));% \' x `5 g u2 N5 L
}
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function getKey($req)
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{
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$key = null;
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if (preg_match("/Sec-WebSocket-Key: (.*)\r\n/", $req, $match)) {
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$key = $match[1]; 6 x/ i1 y) y3 P. y+ l" @
}
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return $key;0 W+ b! [/ W% @5 e; V$ v2 Q
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// 解析数据帧/ P' J/ ^6 _0 a U+ R# ~: a
function decode($buffer)
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{
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$len = $masks = $data = $decoded = null;% p! G( H3 Y& {: U3 `
$len = ord($buffer[1]) & 127;( f( b5 e$ K* j
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if ($len === 126) {
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$masks = substr($buffer, 4, 4);
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$data = substr($buffer, 8);) M3 t: |* X9 I; ]" s% Z* f$ V
} else if ($len === 127) {
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$masks = substr($buffer, 10, 4);
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$data = substr($buffer, 14);
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} else {0 g* [: u! l) K. u" t* @7 m0 X( t
$masks = substr($buffer, 2, 4);
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$data = substr($buffer, 6);
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}$ Z% ^9 _. G ~
for ($index = 0; $index < strlen($data); $index++) {( J- A( z9 e+ p6 M* Z7 o0 W/ h
$decoded .= $data[$index] ^ $masks[$index % 4];
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return $decoded;
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}
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// 返回帧信息处理
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function frame($s) 9 w$ L- u& {! E* K
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$a = str_split($s, 125);
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if (count($a) == 1) {! a5 x0 w0 e% n- j& p
return "\x81" . chr(strlen($a[0])) . $a[0];3 C: ?& j h) ^6 M+ M
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$ns = "";5 g9 b, d& b6 ]- a- g
foreach ($a as $o) {
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$ns .= "\x81" . chr(strlen($o)) . $o;
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}
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return $ns;! o% k. r7 ]9 j+ C5 [ ^/ ?# H8 [7 x
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// 返回数据
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function send($client, $msg)
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$msg = $this->frame($msg);% g0 x! h& e8 K3 d2 i
socket_write($client, $msg, strlen($msg));5 d8 {, i& L6 H5 a- |6 \) J
}
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}
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测试 $ws = new WS("127.0.0.1",2000);
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