PHP 简单实现webSocket

admin · 发表于 2018-10-27 12:35:15

1）客户端实现

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<head>
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<meta charset="UTF-8">. ^: J+ f1 ]) }% \' L$ V
<title>Web sockets test</title>, B' Z( d% T5 X" b( @
<script src="jquery-min.js" type="text/javascript"></script>
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<script type="text/javascript">& k; G0 @3 s- t4 w! H" D5 V" G7 c
var ws;( c5 s9 Z6 M5 \ s* W. \
function ToggleConnectionClicked() { - e" z F8 `5 f8 {; A W9 k
try {
ws = new WebSocket("ws://127.0.0.1:2000");//连接服务器 3 |1 J2 V& I4 k; G8 X t6 ]
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);};1 B. _, G: S5 ~- A# t. m
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！");};: R9 m5 _# E: D0 y
} catch (ex) {% E [' a2 E: S7 h T# i
alert(ex.message); 5 ~9 M- ?' q$ U6 Q& V: F
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};
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function SendData() {
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try{1 M' I( H3 C8 C* L: ^7 U
var content = document.getElementById("content").value;" F: e1 a+ `( U% P }1 Z
if(content){% o$ v* k' B5 [* e
ws.send(content);: B& \. V! H; U' ]6 z
}
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}catch(ex){
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alert(ex.message);
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}
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};1 B6 [6 G! U% `- b# \" S
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function seestate(){
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alert(ws.readyState);8 A# ~" W. X; i; m( K' N
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</script>2 |4 j G( T+ K! l1 U' W3 g
</head># U) P1 `' L( F0 I. |* o X
<body>) \# E1 E& [* Y" W
<button id='ToggleConnection' type="button" onclick='ToggleConnectionClicked();'>连接服务器</button><br /><br />2 T# Y% V, f" W
<textarea id="content" ></textarea>0 l5 B* q0 d: `" Z4 v) O# |( N
<button id='ToggleConnection' type="button" onclick='SendData();'>发送我的名字：beston</button><br /><br />. d; d" A( \! a' M( g- f
<button id='ToggleConnection' type="button" onclick='seestate();'>查看状态</button><br /><br />: ?' n3 y0 Z! y& \8 R6 T; |
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</body>
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</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2 A1 l/ s5 e) s: ]1 t
var $handshake = false; // 判断是否握手
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function __construct($address, $port){5 y2 V; a' x; L- q
// 建立一个 socket 套接字
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$this->master = socket_create(AF_INET, SOCK_STREAM, SOL_TCP) ; H9 s) j4 J" L! E/ l) N( X" c4 Z
or die("socket_create() failed");5 E" f; b' r* s5 Y$ v, C& l/ `
socket_set_option($this->master, SOL_SOCKET, SO_REUSEADDR, 1) # C1 [& r" { f4 Z: X- S+ {
or die("socket_option() failed");- X& G- J; X0 [
socket_bind($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");
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$this->sockets[] = $this->master;
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// debug
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echo("Master socket : ".$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% `' _; Q+ l z4 l4 I4 ~# t
$write = NULL;7 a( ?$ s7 J5 ?; K$ G
$except = NULL;' o! d3 i( p5 p3 q- i
socket_select($this->sockets, $write, $except, NULL);. B' V7 r6 k) |: J' y" w$ f
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foreach ($this->sockets as $socket) {3 `- y6 D7 O& ]1 i. S
//连接主机的 client
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if ($socket == $this->master){( b) d1 `( ]/ l# U2 L( V
$client = socket_accept($this->master);/ Q) T2 R9 H. T! d0 y& D
if ($client < 0) {
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// debug
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echo "socket_accept() failed";
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continue;" j0 C9 Q- b7 ?% o$ c/ g/ a
} else {
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//connect($client);1 P! w& y3 S' W- Z; x/ x8 N
array_push($this->sockets, $client);
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echo "connect client\n";
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}! L; H- v: x: _. P
} else {
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$bytes = @socket_recv($socket,$buffer,2048,0);
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print_r($buffer);6 R/ F* z' x+ v9 b
if($bytes == 0) return;
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if (!$this->handshake) {3 S" w* n5 s4 O
// 如果没有握手，先握手回应
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$this->doHandShake($socket, $buffer);
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echo "shakeHands\n";) a; I7 a7 ^0 R* S
} else {
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// 如果已经握手，直接接受数据，并处理
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$buffer = $this->decode($buffer);
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//process($socket, $buffer);
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echo "send file\n";
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} }' [6 t( B' `4 L; t; ~5 B' o! W9 u
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}
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function dohandshake($socket, $req)6 t; F( E3 Q6 d$ ^, [5 _9 x
{
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// 获取加密key. H# Q3 V: G0 q# ]
$acceptKey = $this->encry($req);/ h5 Y# D, _3 _/ W; `
$upgrade = "HTTP/1.1 101 Switching Protocols\r\n" .' ~5 ^" |4 S$ D) ^) d5 {& p) N
"Upgrade: websocket\r\n" .
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"Connection: Upgrade\r\n" .
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"Sec-WebSocket-Accept: " . $acceptKey . "\r\n" .
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"\r\n";* {; N7 E8 r3 @3 `. G; \& l
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echo "dohandshake ".$upgrade.chr(0); $ u9 A' v1 R8 E# T7 V3 @1 Q! b5 x
// 写入socket. O; [( }5 t6 y% S% O( V7 ?+ W
socket_write($socket,$upgrade.chr(0), strlen($upgrade.chr(0)));
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// 标记握手已经成功，下次接受数据采用数据帧格式( K% e- J4 m2 K, v9 M6 k+ y$ c
$this->handshake = true;
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function encry($req)
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$key = $this->getKey($req);
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$mask = "258EAFA5-E914-47DA-95CA-C5AB0DC85B11";8 Z/ ^: V. J7 G
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return base64_encode(sha1($key . '258EAFA5-E914-47DA-95CA-C5AB0DC85B11', true));
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}
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function getKey($req) . D8 q4 e' N; \4 @
{
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$key = null;8 ^! S: E* V+ j# C
if (preg_match("/Sec-WebSocket-Key: (.*)\r\n/", $req, $match)) { * N8 h# d( D! F- @
$key = $match[1];
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}
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return $key;
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}
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// 解析数据帧3 D% Q/ `6 p+ a" _9 ?
function decode($buffer)
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{
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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) {2 L3 Y& L; i% b! F; N$ b
$masks = substr($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($buffer, 10, 4);% M/ U$ [0 `# l( L: x# Y5 U
$data = substr($buffer, 14);& P2 a0 p5 t1 l3 v$ ~
} else {
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$masks = substr($buffer, 2, 4);
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$data = substr($buffer, 6);5 w" Z; m, k2 Z |! A* L* a6 J8 R; M
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for ($index = 0; $index < strlen($data); $index++) {3 b- k0 z; v: U' R: e, ]
$decoded .= $data[$index] ^ $masks[$index % 4];* H, `; o; }5 ^' M4 |
}
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return $decoded;! |+ J2 O9 w) l" H/ E
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// 返回帧信息处理
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function frame($s) ( O# i" |1 Q: I
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$a = str_split($s, 125);
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if (count($a) == 1) {8 y7 ~( R. Q) @& Q7 S# r7 ?
return "\x81" . chr(strlen($a[0])) . $a[0];0 U6 z9 N' a" o& s
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$ns = "";. D3 f, @, J$ p. s: S" _
foreach ($a as $o) {
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$ns .= "\x81" . chr(strlen($o)) . $o;- F- T3 k" G( X) d
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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, $msg). R* Y3 _) H. I$ u' j, v
{
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$msg = $this->frame($msg);
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socket_write($client, $msg, strlen($msg));
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测试 $ws = new WS("127.0.0.1",2000);
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