PHP 简单实现webSocket

admin · 发表于 2018-10-27 12:35:15

1）客户端实现

<html>4 A3 S$ O, S" o p) m( |9 b
<head> X( p8 V9 g* w; b4 @ W
<meta charset="UTF-8">7 v4 L' s' c5 \- E, b
<title>Web sockets test</title>+ i( d, {/ f: g; B. M3 ]$ C
<script src="jquery-min.js" type="text/javascript"></script>
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<script type="text/javascript">0 X* a' q4 t. ^1 a1 h
var ws;
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function ToggleConnectionClicked() {
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try {
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ws = new WebSocket("ws://127.0.0.1:2000");//连接服务器 : p1 [' K/ o( L
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);};+ j, G% e, J+ e" {
ws.onmessage = function(event){alert("接收到服务器发送的数据：\r\n"+event.data);};, {7 e: x/ e$ R u3 y
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);};$ f" s" k6 `9 w$ h* f/ {8 w
ws.onerror = function(event){alert("WebSocket异常！");};
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} catch (ex) {
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alert(ex.message); # _6 H2 q6 f2 S/ p
}# [9 s m! n+ T7 L9 `6 Q8 `
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function SendData() {- s' v, ^% ~. s/ _8 }
try{5 o2 g7 H3 L5 o
var content = document.getElementById("content").value;/ I" A* X& |; K# ~ X! i
if(content){. B" I+ ~) y2 n( ~
ws.send(content);
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}catch(ex){
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alert(ex.message);. D' r$ v2 s% x. j
}
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};
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function seestate(){8 B. h+ E/ E0 n4 N \: f2 O
alert(ws.readyState);8 ]5 l& J2 ^. C
}
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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 /> \/ o2 V/ A/ T) q" ~! ^! @
<textarea id="content" ></textarea>. I' D/ _* b( o
<button id='ToggleConnection' type="button" onclick='SendData();'>发送我的名字：beston</button><br /><br />
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<button id='ToggleConnection' type="button" onclick='seestate();'>查看状态</button><br /><br />
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</body>
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</html>/ @' o4 h. N0 ~1 Q, x8 Q; A( o

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2）服务器端实现

class WS {
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var $master; // 连接 server 的 client0 j) B- O, t$ m+ ~
var $sockets = array(); // 不同状态的 socket 管理- s1 x! X" o# j) I3 [
var $handshake = false; // 判断是否握手* r. v: X# b, P( v2 c% {' G1 F" x
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function __construct($address, $port){* w! X; S% m4 e* w" _
// 建立一个 socket 套接字6 K+ t" j& o* M
$this->master = socket_create(AF_INET, SOCK_STREAM, SOL_TCP) . i" p: v H. r, P. K
or die("socket_create() failed");
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socket_set_option($this->master, SOL_SOCKET, SO_REUSEADDR, 1) + r# z; R; n. d3 x4 C/ O" e" A
or die("socket_option() failed");
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socket_bind($this->master, $address, $port)
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or die("socket_bind() failed");
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socket_listen($this->master, 2) " r/ G' j7 c" S+ f2 r% A
or die("socket_listen() failed");
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$this->sockets[] = $this->master;" D' ^+ ^2 ]/ P: b9 G0 r5 ^1 ]
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// debug
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echo("Master socket : ".$this->master."\n");) B! y+ ^, T5 i0 K9 p A2 K
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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! ~! Y- l" C- d# ^9 S1 e
$write = NULL;
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$except = NULL;* H) V) X) z. B7 C# D: p
socket_select($this->sockets, $write, $except, NULL);/ w& [, O5 n5 _+ r7 }: K* ~
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foreach ($this->sockets as $socket) {# {6 q5 c; Y; U* N. u
//连接主机的 client + B4 y2 G* E. h, M
if ($socket == $this->master){
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$client = socket_accept($this->master);
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if ($client < 0) {
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// debug9 r" ` k$ G( f( W% ?, L
echo "socket_accept() failed";
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continue;
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} else {
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//connect($client);6 o( v6 a0 J! a" I! E
array_push($this->sockets, $client);
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echo "connect client\n";9 L/ \* g2 X/ _4 B* k; B
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} else {+ Z5 K4 `8 v- i7 @8 [ L" I# ?
$bytes = @socket_recv($socket,$buffer,2048,0);. n, z8 c/ L( ~$ ^ z
print_r($buffer);
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if($bytes == 0) return;
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if (!$this->handshake) {
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// 如果没有握手，先握手回应! P# E r$ U* S5 K0 }6 R
$this->doHandShake($socket, $buffer);
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echo "shakeHands\n";: p/ y5 k* u# @2 _
} else {
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// 如果已经握手，直接接受数据，并处理
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$buffer = $this->decode($buffer);
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//process($socket, $buffer);
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echo "send file\n";1 [0 k% c7 Z4 P! {1 j
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}
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}
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}
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function dohandshake($socket, $req)9 f+ |3 { X$ s; J/ d. S
{
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// 获取加密key. l$ Q7 O- B% r7 Y/ a: l4 i
$acceptKey = $this->encry($req);- |, w6 d% j2 A5 y6 O) ?# N( Z
$upgrade = "HTTP/1.1 101 Switching Protocols\r\n" .8 _9 F0 Q) E6 \( N3 N
"Upgrade: websocket\r\n" .
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"Connection: Upgrade\r\n" .
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"Sec-WebSocket-Accept: " . $acceptKey . "\r\n" .
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"\r\n";
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echo "dohandshake ".$upgrade.chr(0); " T1 f1 e' l7 G, ]+ R
// 写入socket
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socket_write($socket,$upgrade.chr(0), strlen($upgrade.chr(0)));4 F) E6 y& X7 E. X; X' J" M4 Z8 b8 z6 h
// 标记握手已经成功，下次接受数据采用数据帧格式* u' r Y: w% `6 C. r( i
$this->handshake = true;+ J0 V; X0 I- Z+ N/ ?' @
} @' O& o$ J8 a# q
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function encry($req), z" X! x! {4 H9 [
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$key = $this->getKey($req);5 u) o3 V6 P: \9 Y p
$mask = "258EAFA5-E914-47DA-95CA-C5AB0DC85B11";7 R) p9 v5 h4 }; _* v8 I7 K6 h: {
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return base64_encode(sha1($key . '258EAFA5-E914-47DA-95CA-C5AB0DC85B11', true));
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function getKey($req) + b; L5 t% t" B+ `& z
{
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$key = null;
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if (preg_match("/Sec-WebSocket-Key: (.*)\r\n/", $req, $match)) { ; I4 D1 l2 z, {5 ~9 Q2 M
$key = $match[1]; & a U# e' T/ K$ X/ q
}
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return $key;( P, {0 n% @2 l1 r2 n9 Y* b
}
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// 解析数据帧
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function decode($buffer)
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{
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$len = $masks = $data = $decoded = null;! C9 v* [& L/ ?& X
$len = ord($buffer[1]) & 127;" Q- B2 J, o. u/ u) y1 D; X
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if ($len === 126) {
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$masks = substr($buffer, 4, 4);
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$data = substr($buffer, 8);6 |, o( R C; _
} else if ($len === 127) {
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$masks = substr($buffer, 10, 4);" l5 k/ k6 {( G" N
$data = substr($buffer, 14);8 g$ |( ]5 Q1 O+ o, N4 G: A; ^% G
} else {; Q9 T$ f2 J5 E" m0 J
$masks = substr($buffer, 2, 4);/ g: e& ~. h4 u4 k) R5 A
$data = substr($buffer, 6);$ b: y* w" }4 G, O" h! V2 C
}
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for ($index = 0; $index < strlen($data); $index++) {: Q& l8 J4 p4 O1 O0 z
$decoded .= $data[$index] ^ $masks[$index % 4];$ ~7 F6 M& j( C4 ]
}
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return $decoded;
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}
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// 返回帧信息处理2 S# l+ O: ^7 k2 N" r$ p" t1 g
function frame($s)
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{: o- @: U0 L5 r4 ^/ ]# O: x
$a = str_split($s, 125);
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if (count($a) == 1) {' H" v# k1 {" c+ Z5 e5 Q7 t8 e) J
return "\x81" . chr(strlen($a[0])) . $a[0];& I5 _! ~4 w9 _# ^- }
}
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$ns = "";6 s- I3 A& ^. P. |- l
foreach ($a as $o) {
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$ns .= "\x81" . chr(strlen($o)) . $o;9 K3 y! S% j" _& p3 J% D( _
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return $ns;, ] S% j5 ]5 B6 }
}
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// 返回数据
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function send($client, $msg)
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{
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$msg = $this->frame($msg);$ {* B! n3 I0 E3 |
socket_write($client, $msg, strlen($msg));
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}
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}
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测试 $ws = new WS("127.0.0.1",2000);
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