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>
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<script src="jquery-min.js" type="text/javascript"></script>6 |" K. W; N* }. ]5 U) b
<script type="text/javascript">
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var ws;- i% F8 ]9 f, _# Q
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
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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);};6 f' r$ j6 y: b% ]2 f
ws.onmessage = function(event){alert("接收到服务器发送的数据：\r\n"+event.data);};: N }; H l: b$ @
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！");};1 X& V7 W% x! t4 `8 `& p, T
} catch (ex) {. p$ K8 r( Z( Q4 i- {& O
alert(ex.message);
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}
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};
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function SendData() {6 X) s# F" r/ w5 V/ N
try{% C) Q; D3 z( F& y9 {- `
var content = document.getElementById("content").value;& T# E( M3 ~8 e+ H/ s/ y
if(content){' U" P0 S7 C6 [2 C
ws.send(content);& X% D) f1 L/ F0 x' G
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}catch(ex){& d9 u/ S6 `' w7 Q+ E! J( {3 R- k1 R
alert(ex.message);1 k4 J8 w, y. X3 `" a8 \) a: I2 R
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};" P' E- Q: a3 |& l
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function seestate(){
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alert(ws.readyState);
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}
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</script>- x2 z1 x4 T5 a& L# ~+ J
</head>+ ]9 P) |* ^7 x# K* t* }7 \, k
<body>* H0 G; |& y3 e5 A |
<button id='ToggleConnection' type="button" onclick='ToggleConnectionClicked();'>连接服务器</button><br /><br />
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<textarea id="content" ></textarea>8 k& r% m1 s" \7 X6 U
<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 />) g1 y; V) ~3 V
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</body>
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</html>& l4 g" t S( |5 v0 ?4 n

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2）服务器端实现

class WS {
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var $master; // 连接 server 的 client; I- N5 \, v& A: c0 A4 W- {& Z4 |
var $sockets = array(); // 不同状态的 socket 管理
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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) 8 |# J# ?+ a# j/ d+ F
or die("socket_create() failed");
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socket_set_option($this->master, SOL_SOCKET, SO_REUSEADDR, 1)
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or die("socket_option() failed"); S! Y. P" V& E+ o9 w$ ]
socket_bind($this->master, $address, $port) # Z, d" U+ B/ [) P+ W
or die("socket_bind() failed");
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socket_listen($this->master, 2)
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or die("socket_listen() failed");) x9 k* V V" h! W( X) N+ |& b$ {
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$this->sockets[] = $this->master;9 T1 z% a' s2 }& `5 c& m& f
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// debug# M: J; u4 D0 s8 h* F- q
echo("Master socket : ".$this->master."\n");0 b9 }& z* v& S; ^( g
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while(true) {4 E1 K6 F h/ B6 M K
//自动选择来消息的 socket 如果是握手自动选择主机6 k" u* O- v) {* n p0 j9 A
$write = NULL;& Z% g8 v; `0 y+ f' s
$except = NULL;8 ]: }0 I0 B0 `6 f
socket_select($this->sockets, $write, $except, NULL);
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foreach ($this->sockets as $socket) {
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//连接主机的 client ! p: i( {" j9 } M" `
if ($socket == $this->master){: ~) v" @+ t2 M3 c3 E" u9 ~ Y( ?& A
$client = socket_accept($this->master);
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if ($client < 0) {4 m+ w9 J7 M1 X; ^# t' R
// debug5 r8 _6 { {# o2 _! D0 G$ x6 S
echo "socket_accept() failed";) o' _% Y- M4 T2 F$ H) O
continue;
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} else {5 b' d4 k* V% X+ i8 k
//connect($client);2 Y$ H! Y* P% f( L2 }6 v0 A z: F9 c
array_push($this->sockets, $client);2 j7 Q1 B2 C+ Y k
echo "connect client\n";
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}
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} else {
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$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 (!$this->handshake) {9 ?6 p% n2 A0 t; `7 H
// 如果没有握手，先握手回应
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$this->doHandShake($socket, $buffer);
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echo "shakeHands\n";
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} else {) K# X2 d; K' P" a! ] m2 k. k
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// 如果已经握手，直接接受数据，并处理7 |0 l) i% }' T9 D% a! \
$buffer = $this->decode($buffer);) T/ d: }& F/ |% G
//process($socket, $buffer); # y$ K9 p) d; {# T
echo "send file\n";# g2 t M- `2 u3 A+ ?% s
}
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}
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}
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function dohandshake($socket, $req) B) B4 M/ m B, C, f S
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// 获取加密key
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$acceptKey = $this->encry($req);& \- f2 n) W$ o6 [$ L6 N( v- u
$upgrade = "HTTP/1.1 101 Switching Protocols\r\n" .& b; Y" o% L9 P+ \1 E# g3 G
"Upgrade: websocket\r\n" .* w4 m# v/ q! }* I
"Connection: Upgrade\r\n" .
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"Sec-WebSocket-Accept: " . $acceptKey . "\r\n" .
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"\r\n";1 G& A; c; V; i, t8 A0 M6 o( A; i
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echo "dohandshake ".$upgrade.chr(0); 9 G7 b6 `% c" I1 j7 c
// 写入socket
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socket_write($socket,$upgrade.chr(0), strlen($upgrade.chr(0)));
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// 标记握手已经成功，下次接受数据采用数据帧格式$ R& @( C( n( U9 A8 @) P6 v; @7 j
$this->handshake = true;+ k4 x1 K% Z% m7 B
}
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function encry($req)% X# ?0 W, z b0 G' J! H( V
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$key = $this->getKey($req);
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$mask = "258EAFA5-E914-47DA-95CA-C5AB0DC85B11";+ V8 m2 Z0 J7 o
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return base64_encode(sha1($key . '258EAFA5-E914-47DA-95CA-C5AB0DC85B11', true));
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function getKey($req) $ a* T/ Q9 Z5 V/ @+ M% b
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$key = null;' M/ E; p* p6 A$ A- P5 S
if (preg_match("/Sec-WebSocket-Key: (.*)\r\n/", $req, $match)) {
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$key = $match[1];
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return $key;) x1 M5 V+ x1 n6 Z+ X
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// 解析数据帧3 D! J3 [: r7 ^. T0 V, E8 q# V
function decode($buffer)
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$len = $masks = $data = $decoded = null;4 m; T/ I( Q: }- V8 ^% z
$len = ord($buffer[1]) & 127;. J, \7 @! J$ |; O+ j
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if ($len === 126) {
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$masks = substr($buffer, 4, 4);
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$data = substr($buffer, 8);
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} else if ($len === 127) {
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$masks = substr($buffer, 10, 4);8 o& s- e/ _; L* N8 A; l& U) Z
$data = substr($buffer, 14);
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} else {% J- ~& |8 K7 B6 Q; v
$masks = substr($buffer, 2, 4);
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$data = substr($buffer, 6);! X$ Z: {" ]0 v; k. J8 d; ~
}
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for ($index = 0; $index < strlen($data); $index++) {
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$decoded .= $data[$index] ^ $masks[$index % 4];( p H' P! z7 c" s' B
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return $decoded;
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}
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// 返回帧信息处理) y6 n: O6 W! C& H$ K4 q" Y
function frame($s)
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$a = str_split($s, 125);
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if (count($a) == 1) {
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return "\x81" . chr(strlen($a[0])) . $a[0];
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$ns = "";
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foreach ($a as $o) {) h9 x( d; Q' p! {8 i' G
$ns .= "\x81" . chr(strlen($o)) . $o;" z) N! \7 ?* J7 R( N
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return $ns;# [) T! C1 e% B6 ^( E7 @4 b
}
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// 返回数据
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function send($client, $msg)9 t4 \# O3 e$ M( q: s, u0 d5 Z
{% O3 a' P: Y: c; e# r
$msg = $this->frame($msg);
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socket_write($client, $msg, strlen($msg));, Q' V7 E$ k6 c* `# T% |! Q @
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测试 $ws = new WS("127.0.0.1",2000);+ X, \0 D; h$ c! z* R# V! f: ]3 G
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