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>1 n1 }- c4 d* O$ Q; k; `: L
<meta charset="UTF-8">
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<title>Web sockets test</title># U+ O: H. N1 O/ k' c
<script src="jquery-min.js" type="text/javascript"></script>5 [3 q9 V$ U2 J. }5 s: [( B
<script type="text/javascript">
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var ws;
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function ToggleConnectionClicked() { 5 O) O. y) p0 p& y. Q3 w/ z/ z
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);};
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ws.onmessage = function(event){alert("接收到服务器发送的数据：\r\n"+event.data);};: s1 m2 x3 w2 r! p5 m7 f7 h; q, H( H
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！");};
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} catch (ex) {1 P6 _5 { Y6 _! q$ e
alert(ex.message);
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};
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function SendData() {8 A! O& N* A8 Q* i4 j8 N
try{
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var content = document.getElementById("content").value;
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if(content){
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ws.send(content);
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}catch(ex){6 l. N1 G3 t9 f8 n3 t: [. y4 W% |
alert(ex.message);% Z6 y$ D4 l3 @! E6 c* k
}
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};
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function seestate(){" c/ Y+ p3 ^0 n
alert(ws.readyState);) Y4 z4 r; k1 u& J
}
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</script>
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</head>' X2 ?$ D& V X
<body>( Y' w2 ?+ x( F6 b. z$ S5 G B
<button id='ToggleConnection' type="button" onclick='ToggleConnectionClicked();'>连接服务器</button><br /><br />
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<textarea id="content" ></textarea>" x) Y+ M! Z$ J
<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> S; c, I: W1 L6 @- }. N

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2）服务器端实现

class WS {9 ?+ a. V1 D9 m3 O5 U
var $master; // 连接 server 的 client9 h8 [* q7 l$ c) w5 X" O
var $sockets = array(); // 不同状态的 socket 管理3 y9 z0 Q) B7 p% u4 z! f- ]. k
var $handshake = false; // 判断是否握手* D4 n: I& d+ `; g/ r
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function __construct($address, $port){
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// 建立一个 socket 套接字' m; k, D/ o$ A6 B q
$this->master = socket_create(AF_INET, SOCK_STREAM, SOL_TCP)
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or die("socket_create() failed");
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socket_set_option($this->master, SOL_SOCKET, SO_REUSEADDR, 1) , J' R3 |4 l% X( G5 `# F0 k
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)
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or die("socket_listen() failed");# }/ f/ J/ x$ I
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$this->sockets[] = $this->master;" V7 h( {- x/ g7 Q
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// debug) E6 k* R- }( W6 N2 ?# T+ o
echo("Master socket : ".$this->master."\n");8 Y- W5 u% G( w! L7 Q
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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0 ` Y+ F: ?7 O; \/ d
$write = NULL;
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$except = NULL;5 l X! f5 f# h8 y
socket_select($this->sockets, $write, $except, NULL);" `! v# y0 {' l9 G/ ?- g6 B
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foreach ($this->sockets as $socket) {
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//连接主机的 client 9 s: }9 U5 u4 J# o6 L5 i* y
if ($socket == $this->master){
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$client = socket_accept($this->master);/ [3 n+ G: z$ B: B# M K
if ($client < 0) {
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// debug% G& J- y/ [: Y
echo "socket_accept() failed";
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continue;* u9 W6 u. R% ?% w2 Y. j0 D7 N
} else {
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//connect($client);7 \) `: c' u' ?: g' T- U' i% c8 s" e6 F
array_push($this->sockets, $client);
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echo "connect client\n";# h0 n* I( S$ Y/ t1 }1 o# q) q3 _: g
}
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} else {2 A+ {6 x# N) C# m" {; o2 k5 ~
$bytes = @socket_recv($socket,$buffer,2048,0);
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print_r($buffer);1 l. {1 `+ h$ M, i
if($bytes == 0) return;
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if (!$this->handshake) {' H; T7 Q! E5 h9 d9 }
// 如果没有握手，先握手回应0 ?2 D/ x" N2 [% ]' H6 ]
$this->doHandShake($socket, $buffer);
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echo "shakeHands\n";, G$ Z6 X- N/ Z) m' w6 ?' s
} else {+ k/ i( u+ m8 ?* K5 p/ \$ J
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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, $buffer);
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echo "send file\n";1 g* |% I. o. |4 |! U6 ~8 v T. e
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}
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}
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function dohandshake($socket, $req)) d9 l/ f( v. O6 U/ b0 F
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// 获取加密key
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$acceptKey = $this->encry($req);4 o) @, Z1 b6 c
$upgrade = "HTTP/1.1 101 Switching Protocols\r\n" ./ x, D, K Z+ ^1 {' z
"Upgrade: websocket\r\n" .5 q; M% \$ q5 j {' N; q. D" o
"Connection: Upgrade\r\n" .: _ Y. x2 @8 }2 S# k. K; a
"Sec-WebSocket-Accept: " . $acceptKey . "\r\n" .5 c5 s2 E7 s- l8 N
"\r\n";
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echo "dohandshake ".$upgrade.chr(0);
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// 写入socket+ S6 u- c, U$ h* O, U* g- H
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' o. q: U, @3 g* S, ^/ U
$this->handshake = true;
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function encry($req)3 o3 r6 Z" j& g u
{
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$key = $this->getKey($req);- B3 J4 D( Q0 {! D8 |+ s- k0 u; w
$mask = "258EAFA5-E914-47DA-95CA-C5AB0DC85B11";7 Y1 v6 s1 O( [. ^" T }
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return base64_encode(sha1($key . '258EAFA5-E914-47DA-95CA-C5AB0DC85B11', true));
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function getKey($req) " w; B3 b7 y, n- N
{
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$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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return $key;
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// 解析数据帧/ [7 G3 J c; M; l3 Z" Y) a0 y1 F
function decode($buffer)
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$len = $masks = $data = $decoded = null;
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$len = ord($buffer[1]) & 127;5 Q3 f+ o1 `: R( O3 \) y2 }
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if ($len === 126) {" n5 E% ]3 B h: I E( v! f* p9 h
$masks = substr($buffer, 4, 4);
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$data = substr($buffer, 8);$ E0 k' C0 c9 Y
} else if ($len === 127) {7 z7 H5 V% V r( A: ]
$masks = substr($buffer, 10, 4);
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$data = substr($buffer, 14);
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} else {1 H+ C* a4 q _. }8 t- F5 `' t
$masks = substr($buffer, 2, 4);# G+ ^6 P4 n ]& ^6 o
$data = substr($buffer, 6);! R2 b+ n; f6 J2 T6 L
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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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return $decoded;" ?$ l+ O$ J6 ~1 ^' _& N& R! k
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// 返回帧信息处理
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function frame($s)
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$a = str_split($s, 125);
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if (count($a) == 1) {1 G( w) S% _9 u _7 H% i
return "\x81" . chr(strlen($a[0])) . $a[0];
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}
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$ns = "";
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foreach ($a as $o) {
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$ns .= "\x81" . chr(strlen($o)) . $o;
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return $ns;
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}; U0 ]5 b; X0 i( a: D! k' P3 D
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// 返回数据" o) b8 i% T: b0 Z+ \7 n7 r. L
function send($client, $msg)4 [) o# [6 |9 z2 Q
{
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$msg = $this->frame($msg);
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socket_write($client, $msg, strlen($msg));* }5 a. x$ V8 l! ~( W
}
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测试 $ws = new WS("127.0.0.1",2000);
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