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">
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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;4 a% e4 M0 X5 n1 y
function ToggleConnectionClicked() { / o& ^( o. r4 V2 f" E" w) {1 J
try {
ws = new WebSocket("ws://127.0.0.1:2000");//连接服务器 1 D! h1 p2 ?' b
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);};7 U" D4 |# I0 u; ~5 J7 F% g
ws.onmessage = function(event){alert("接收到服务器发送的数据：\r\n"+event.data);};1 f; N; U% t- Y C4 p( ?3 x
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！");};4 n' h9 y. n, l+ L& y
} catch (ex) {3 {& J5 x6 z6 i( L
alert(ex.message);
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}
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};2 G8 H# x+ I$ A w# D
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function SendData() {
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try{' a Z6 I2 G5 ?7 C4 a, S
var content = document.getElementById("content").value;2 c7 W( D8 C; t9 D1 H( X: Y
if(content){
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ws.send(content);
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}catch(ex){0 ]& ^' }1 I$ A/ C
alert(ex.message);
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};; l- M$ K3 P: U F) X' L
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function seestate(){
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alert(ws.readyState);
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}; @% i# _- L: f/ I5 u
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</script>: G$ w- L$ G- n0 a N! Z7 q; M( e
</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 /> O3 f; y; v* D) F$ Z2 l% r, [
<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 />" w& h( X3 V0 b8 z: o- b) C% O
<button id='ToggleConnection' type="button" onclick='seestate();'>查看状态</button><br /><br />0 D) ^! ~3 U# i
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</body>8 Y8 x2 l' Z; M+ g1 J5 S
</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- X5 R Y3 Q+ O6 x# r" O
var $sockets = array(); // 不同状态的 socket 管理0 j- g. q) t: h/ X& Q
var $handshake = false; // 判断是否握手
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function __construct($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");
socket_set_option($this->master, SOL_SOCKET, SO_REUSEADDR, 1)
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or die("socket_option() failed");
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socket_bind($this->master, $address, $port)
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or die("socket_bind() failed");) N5 T3 j4 X* Q" c0 K$ J- _
socket_listen($this->master, 2) 8 S S# i/ Y7 ~
or die("socket_listen() failed");8 ^ }! F* V8 S: x1 j6 }7 ?4 ^
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$this->sockets[] = $this->master;; p8 L/ m1 C/ m F
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// debug
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echo("Master socket : ".$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# H# ]% o. x6 c7 [3 \; Q5 F3 |
$write = NULL;. m4 }- @6 r8 P& i$ k- C/ {
$except = NULL;
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socket_select($this->sockets, $write, $except, NULL);
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foreach ($this->sockets as $socket) {' }* l, K# p) P7 I6 A) B8 d
//连接主机的 client
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if ($socket == $this->master){
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$client = socket_accept($this->master);
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if ($client < 0) {
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// debug6 n# k! ]4 C/ C# x- S
echo "socket_accept() failed";+ M% _: d. O) Z( k. U# y
continue;
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} else {
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//connect($client);
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array_push($this->sockets, $client);
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echo "connect client\n";
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} else {. x& \; d& ^$ f$ r* A+ A/ {0 v
$bytes = @socket_recv($socket,$buffer,2048,0);
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print_r($buffer);
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if($bytes == 0) return;
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if (!$this->handshake) {$ Z+ q: I, c' [' R1 X
// 如果没有握手，先握手回应
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$this->doHandShake($socket, $buffer);2 l; p: f% ?3 p- F$ M
echo "shakeHands\n";$ F! g" p9 B/ S
} else {6 L) u. ?+ ]* d, S b( b I
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// 如果已经握手，直接接受数据，并处理! M; I) U2 E$ _7 d: E
$buffer = $this->decode($buffer);1 u& H6 e$ K; @" n* M" W9 I4 x* {
//process($socket, $buffer); 3 e7 P. V: _6 {( ^
echo "send file\n"; }' Z; R% K) m3 O: g! x9 `
}
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}
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}
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function dohandshake($socket, $req)" M. a3 r) z" F d- T5 K$ _
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// 获取加密key' d5 V1 z1 ^& G0 c0 i: ?- U% s
$acceptKey = $this->encry($req);. y. G# s+ \' ?1 I
$upgrade = "HTTP/1.1 101 Switching Protocols\r\n" .4 ]+ z& U q. i5 l. F
"Upgrade: websocket\r\n" .
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"Connection: Upgrade\r\n" .
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"Sec-WebSocket-Accept: " . $acceptKey . "\r\n" ." E3 d' N, i( r4 j* y7 q1 ~( a
"\r\n";
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echo "dohandshake ".$upgrade.chr(0);
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// 写入socket
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socket_write($socket,$upgrade.chr(0), strlen($upgrade.chr(0)));5 z' {4 [+ [$ N3 Y" w4 v8 b* e# N
// 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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}; \( W( k; V$ j+ c
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function encry($req)
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{
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$key = $this->getKey($req);
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$mask = "258EAFA5-E914-47DA-95CA-C5AB0DC85B11";" ^. E" i$ c, k8 V0 K
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return base64_encode(sha1($key . '258EAFA5-E914-47DA-95CA-C5AB0DC85B11', true));
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}, U5 t9 r+ D# O. M) {
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function getKey($req) # d" r8 i( x2 j7 a
{
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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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}
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return $key;
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}
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// 解析数据帧4 r) {. g- l' k5 p/ S9 S3 ?
function decode($buffer)
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{
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$len = $masks = $data = $decoded = null;) W {. t. X+ A! h/ c# M5 \0 g
$len = ord($buffer[1]) & 127;: Y) i" \% B" P( F l+ {/ ]
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if ($len === 126) {# [$ Q5 W9 M Y) s9 K1 S3 A/ t
$masks = substr($buffer, 4, 4);
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$data = substr($buffer, 8);, V) ]! A3 s: w8 @
} else if ($len === 127) {& D5 V- U* ~6 |
$masks = substr($buffer, 10, 4);
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$data = substr($buffer, 14);
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} else {
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$masks = substr($buffer, 2, 4);8 B1 g) r8 T( V
$data = substr($buffer, 6);
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}
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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 $decoded;
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}
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// 返回帧信息处理( y P. v1 V* M3 M
function frame($s)
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$a = str_split($s, 125);" y: }' N V% N- o
if (count($a) == 1) {
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return "\x81" . chr(strlen($a[0])) . $a[0];% z% Q, \; w7 n
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$ns = "";
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foreach ($a as $o) {* l- w$ R) K4 [4 P$ }4 J
$ns .= "\x81" . chr(strlen($o)) . $o;
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}
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return $ns;
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// 返回数据" H: b! E" r: q* I/ B2 ]/ h$ ^
function send($client, $msg) x/ m9 f# n2 k+ g% [
{
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$msg = $this->frame($msg);- ^1 v# g) _9 ~0 S2 v- R% {4 r! s
socket_write($client, $msg, strlen($msg));; g8 o( a8 i$ b
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}
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测试 $ws = new WS("127.0.0.1",2000);
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