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>, Y! G7 P6 g7 s& m g
<script src="jquery-min.js" type="text/javascript"></script>
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<script type="text/javascript">
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var ws;! `4 q* @" X& W/ L
function ToggleConnectionClicked() {
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try {) [7 |2 z" q6 e' @9 U
ws = new WebSocket("ws://127.0.0.1:2000");//连接服务器 " |8 P+ W+ j7 u3 }
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);};* t; g; j( y: f* H! {* I
ws.onerror = function(event){alert("WebSocket异常！");};' P$ H# W* B2 ]
} catch (ex) {
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alert(ex.message);
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}
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};: F" K* ?' q- z8 C6 u8 d% E
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function SendData() {
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try{6 K' {, Z. r4 b4 J2 S( j% d$ s1 f
var content = document.getElementById("content").value;
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if(content){, R+ `' d& l+ C1 z5 ?/ B7 V2 i
ws.send(content);
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}catch(ex){
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alert(ex.message);$ J, @# l+ V2 [/ J1 |$ G0 o
}
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};
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function seestate(){3 l6 [5 H& |7 T, m% @
alert(ws.readyState);) K/ C& G. c5 D) g
}6 I8 ?! ?0 O! e
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</script>
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</head>/ m( t% v; ]3 [5 m* K/ i
<body>+ N' U N. k Q9 K, o
<button id='ToggleConnection' type="button" onclick='ToggleConnectionClicked();'>连接服务器</button><br /><br />0 [: d" k$ J8 e2 v) f0 a o+ G' G6 t
<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 />% P8 G+ ~3 M1 ^* G2 h
<button id='ToggleConnection' type="button" onclick='seestate();'>查看状态</button><br /><br />' ~3 Z$ H& Q% O k: b
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</body>- E" a& E/ w6 E$ v8 P. h2 _3 w
</html>
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2）服务器端实现

class WS {
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var $master; // 连接 server 的 client$ q6 k0 f/ q j2 f* T( q/ C! X B6 ~2 R
var $sockets = array(); // 不同状态的 socket 管理
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var $handshake = false; // 判断是否握手8 ]/ q1 H% Q0 T
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function __construct($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($this->master, SOL_SOCKET, SO_REUSEADDR, 1) * i+ b/ b+ ?& H$ y4 K
or die("socket_option() failed");, n% D* g4 I6 l$ N7 \: f
socket_bind($this->master, $address, $port)
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or die("socket_bind() failed");2 k! u/ O( t! ?' z$ X
socket_listen($this->master, 2)
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or die("socket_listen() failed");* H; |- V& X4 k' K' m @. M i
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$this->sockets[] = $this->master;2 e3 q) [! I8 n! N' M
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// debug
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echo("Master socket : ".$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
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$write = NULL;/ c6 _5 I* T& A1 A
$except = NULL;7 Y: V' @& |+ G0 W3 R' r. T
socket_select($this->sockets, $write, $except, NULL);1 w0 Z6 C$ L7 y2 |" W
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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 == $this->master){
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$client = socket_accept($this->master);
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if ($client < 0) {
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// debug
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echo "socket_accept() failed";
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continue;# Z( ~' W# F: n4 y
} else {
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//connect($client);5 h8 D" u. r* r. W, e
array_push($this->sockets, $client);
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echo "connect client\n";, D& K. v4 y" q
}! X- B1 @9 F6 R% t6 H( }0 ?# w O8 y
} else {5 c& r! Y* E* e3 W
$bytes = @socket_recv($socket,$buffer,2048,0);
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print_r($buffer);" Q! Y$ Y J" v* R$ A: X
if($bytes == 0) return;
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if (!$this->handshake) {5 D8 n* \, I$ z# o
// 如果没有握手，先握手回应
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$this->doHandShake($socket, $buffer);, u2 d* R' h! f6 J }# W" e
echo "shakeHands\n"; S! @. L5 u" r& ?- _/ |
} else {8 q' }& M/ w; r' m# x
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// 如果已经握手，直接接受数据，并处理$ P; H* B% B0 @3 L9 ^
$buffer = $this->decode($buffer);
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//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);9 X* ]# E8 t8 ~8 w$ }6 ~" X a; M
$upgrade = "HTTP/1.1 101 Switching Protocols\r\n" .- @& }; B( n6 z/ P- U7 a& t" c1 f& \
"Upgrade: websocket\r\n" .+ S% c4 ?. I) v7 Q) d7 U4 j
"Connection: Upgrade\r\n" .0 A! {" Z+ x* f) o
"Sec-WebSocket-Accept: " . $acceptKey . "\r\n" .. M: S" y: N% s4 W5 N z
"\r\n";
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echo "dohandshake ".$upgrade.chr(0);
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// 写入socket) O$ T4 T% h6 y! {. t8 D! ^
socket_write($socket,$upgrade.chr(0), strlen($upgrade.chr(0)));- l- \/ K' w9 v) V+ V" P
// 标记握手已经成功，下次接受数据采用数据帧格式) W {# U1 R6 M1 \
$this->handshake = true;) j$ M* K, E1 K
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function encry($req)
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$key = $this->getKey($req);9 U$ e1 Q; }0 ~7 ]+ Z
$mask = "258EAFA5-E914-47DA-95CA-C5AB0DC85B11";
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return base64_encode(sha1($key . '258EAFA5-E914-47DA-95CA-C5AB0DC85B11', true));2 d+ ]; S$ x5 ^3 r6 ~+ J
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function getKey($req)
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{
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$key = null;% P f5 U) o% i, }
if (preg_match("/Sec-WebSocket-Key: (.*)\r\n/", $req, $match)) { / y: _5 R6 ?1 s) S5 R7 O6 B% [3 q
$key = $match[1]; ! P3 @. n& r4 E6 |- Y
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return $key;: e4 K/ l: H* Y N5 b$ W" @4 o
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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($buffer[1]) & 127;2 H! I: J9 u8 t0 }- J% ` w
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if ($len === 126) {
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$masks = substr($buffer, 4, 4);5 X! s6 t7 f) W
$data = substr($buffer, 8);
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} else if ($len === 127) {2 U! d3 q0 E- y, H3 P$ |4 d" J4 h3 }) P1 z& E
$masks = substr($buffer, 10, 4);( o) l( g# j2 o9 }# F- ` E1 f
$data = substr($buffer, 14);
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} else {
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$masks = substr($buffer, 2, 4);
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$data = substr($buffer, 6);8 d. i m( D+ T% L3 e
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for ($index = 0; $index < strlen($data); $index++) {
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$decoded .= $data[$index] ^ $masks[$index % 4];, E' S7 z$ b' w3 x8 m
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return $decoded;2 |0 J% W0 j# u7 A6 K; ~
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// 返回帧信息处理
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function frame($s)
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{
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$a = str_split($s, 125);
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if (count($a) == 1) {4 ]9 |" M3 J1 Y4 g8 g
return "\x81" . chr(strlen($a[0])) . $a[0];) G* {$ d5 L8 u W1 o$ A
}
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$ns = "";- Y- W( m8 O5 z! c; X
foreach ($a as $o) {
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$ns .= "\x81" . chr(strlen($o)) . $o;3 f& m$ {" x" X- D3 Y
}
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return $ns;
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// 返回数据
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function send($client, $msg)1 \. [+ C1 D! x- d7 U" c
{
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$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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