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标题: PHP 简单实现webSocket [打印本页]
作者: admin    时间: 2018-10-27 12:35
标题: PHP 简单实现webSocket
1）客户端实现) T9 |* K7 M; Y! U/ U5 c- e
  1. <html>( I0 _- J! K* y' Y( |+ f( q
  2. <head>
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  3. <meta charset="UTF-8">
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  4. <title>Web sockets test</title>
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  5. <script src="jquery-min.js" type="text/javascript"></script>
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  6. <script type="text/javascript">- \; o! F) O0 E; G/ `9 @7 ?
  7. var ws;
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  8. function ToggleConnectionClicked() {         
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  9. try {3 o+ z- F' n: E5 l) E# T
  10. ws = new WebSocket("ws://127.0.0.1:2000");//连接服务器        6 f4 _1 v, d3 W" y; k& h
  11. 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);};  d! Q/ {7 ~! i- c# d! Y" \
  12. ws.onmessage = function(event){alert("接收到服务器发送的数据：\r\n"+event.data);};! z( q' M: ]5 o2 X2 @- r1 i7 I
  13. 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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  14. ws.onerror = function(event){alert("WebSocket异常！");};$ x- @3 q8 H0 ~* M' {8 p
  15. } catch (ex) {6 v' b( \. \# {5 e  e
  16. alert(ex.message);      / r( p) j' a! ~3 a( |
  17. }0 \/ Q0 Z5 c9 l) r- e* s3 j$ ]
  18. };5 o: k5 y. Z4 |% b# c
  19. , I) ?& b% k$ h+ y5 p, Z( F
  20. function SendData() {1 G9 _+ s$ ^2 J
  21. try{
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  22. var content = document.getElementById("content").value;- J/ g! \! E( e$ ^
  23. if(content){* a" c3 d' k3 j4 ^
  24. ws.send(content);
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  25. }0 [6 j8 B. R% C2 t. {8 l6 Q+ R; G
  26. & i9 i5 d' h, O% C$ t7 f
  27. }catch(ex){$ A0 f* N# i; M  `) I
  28. alert(ex.message);& g: G' ~7 f4 P" |
  29. }
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  30. };
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  31. ! h  j; I; V7 p; L8 F; \
  32. function seestate(){
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  33. alert(ws.readyState);! a* \1 W: v0 ~4 q1 w. D
  34. }
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  35. " s9 W. u" C- l/ N- O
  36. </script>& E2 e7 G& y9 G6 \
  37. </head>
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  38. <body>( T; q% s  y3 X' m; @9 a0 Y5 J7 ^! z! V
  39. <button id='ToggleConnection' type="button" onclick='ToggleConnectionClicked();'>连接服务器</button><br /><br />1 n5 r- k$ \$ k4 a! f
  40. <textarea id="content" ></textarea>, b) P( T" c; S0 [
  41. <button id='ToggleConnection' type="button" onclick='SendData();'>发送我的名字：beston</button><br /><br />
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  42. <button id='ToggleConnection' type="button" onclick='seestate();'>查看状态</button><br /><br />
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  43. ( f& c8 p! J4 p* K
  44. </body>! m+ z1 f; q' l$ T1 `! J* V
  45. </html>, x0 l$ \% k) V6 s; J/ P
复制代码

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2）服务器端实现
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  1. class WS {
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  2. var $master;  // 连接 server 的 client* l& I1 D" a( S' ~0 ~" v
  3. var $sockets = array(); // 不同状态的 socket 管理
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  4. var $handshake = false; // 判断是否握手8 N! Y* m& e& I) N3 f9 R! j- r
  5. ; H! e( K! o8 p' _; T) [/ e- Y
  6. function __construct($address, $port){
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  7. // 建立一个 socket 套接字
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  8. $this->master = socket_create(AF_INET, SOCK_STREAM, SOL_TCP)   
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  9. or die("socket_create() failed");5 ~; K4 W; b' ^2 }6 }
  10. socket_set_option($this->master, SOL_SOCKET, SO_REUSEADDR, 1)  
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  11. or die("socket_option() failed");5 G8 [: k' \' B5 q' _
  12. socket_bind($this->master, $address, $port)                      a5 n- r# G1 I7 G
  13. or die("socket_bind() failed");
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  14. socket_listen($this->master, 2)                              
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  15. or die("socket_listen() failed");) D0 n3 d2 X4 ~! e2 G* g2 F0 ^
  16. . |" y. e- \( R' |, O. `
  17. $this->sockets[] = $this->master;
    # `$ i* ~1 |) E5 H

  18. ( m0 t" p5 V' f5 v$ T: C/ X
  19. // debug( |! ^, E' v3 v$ G; m
  20. echo("Master socket  : ".$this->master."\n");
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  22. while(true) {9 }+ L: ?0 Z5 |3 H
  23. //自动选择来消息的 socket 如果是握手 自动选择主机- h1 v) _7 W: j* `
  24. $write = NULL;
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  25. $except = NULL;$ h, p9 U, R) Z% k3 b
  26. socket_select($this->sockets, $write, $except, NULL);
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  28. foreach ($this->sockets as $socket) {
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  29. //连接主机的 client ) X* }+ p1 \2 ?; |
  30. if ($socket == $this->master){% j0 e- F; p9 s# T  K
  31. $client = socket_accept($this->master);
    # \1 e$ W: l, S4 x0 T0 F. y" x& X
  32. if ($client < 0) {& _8 Z1 u+ n1 _% H; R2 g
  33. // debug3 }% v3 S$ G& J1 V& ]' H8 q
  34. echo "socket_accept() failed";) b+ X3 T3 D, @3 d0 T1 x& \
  35. continue;
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  36. } else {
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  37. //connect($client);
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  38. array_push($this->sockets, $client);5 }( A3 a" ?& X5 q* R* q- M. I" W( g  D
  39. echo "connect client\n";( Q) ?3 j/ e4 u3 Q
  40. }
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  41. } else {
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  42. $bytes = @socket_recv($socket,$buffer,2048,0);' U+ \0 i$ b: [# k! Y2 I. g% o
  43. print_r($buffer);
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  44. if($bytes == 0) return;5 ]+ T  e# m! q2 S2 O: P
  45. if (!$this->handshake) {: ^% T4 y* X8 O" {* s/ X5 g
  46. // 如果没有握手，先握手回应, v" j& }" O" {
  47. $this->doHandShake($socket, $buffer);
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  48. echo "shakeHands\n";
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  49. } else {
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  50. 3 s9 f* K& S: h: Q
  51. // 如果已经握手，直接接受数据，并处理, b& h; M' m- D. c
  52. $buffer = $this->decode($buffer);
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  53. //process($socket, $buffer);
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  54. echo "send file\n";$ ]! r7 |" [6 R! J# p3 G
  55. }7 E9 q( N9 a# w
  56. }
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  58. }; b1 `. q$ m  N/ U+ e
  59. }
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  60. ! Z6 }2 |6 y+ n* d6 w! F
  61. function dohandshake($socket, $req)
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  62. {
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  63. // 获取加密key# W% v# ?2 L6 [+ K, T
  64. $acceptKey = $this->encry($req);
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  65. $upgrade = "HTTP/1.1 101 Switching Protocols\r\n" .0 l; L- q$ V- E8 x
  66. "Upgrade: websocket\r\n" .6 o0 R3 W* x! r8 m5 @) T. n4 s
  67. "Connection: Upgrade\r\n" .* f& M2 R4 F5 G' u' V( G7 |
  68. "Sec-WebSocket-Accept: " . $acceptKey . "\r\n" .- v- t5 F+ f9 c" ?8 ?% W- ?
  69. "\r\n";! Y' n9 P0 S9 p% w( Y* m3 M7 x7 h
  70. 5 b9 a. O, T! e& }# b8 ?8 Q" H
  71. echo "dohandshake ".$upgrade.chr(0);           9 s: o- m; a  l/ c0 p0 F6 F1 b+ W
  72. // 写入socket
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  73. socket_write($socket,$upgrade.chr(0), strlen($upgrade.chr(0)));
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  74. // 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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  75. $this->handshake = true;/ I# q& g0 p+ w9 L, G! w
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  77. ! N* o8 `; B" P, q0 M9 Y- ^1 \% V" c

  78. . V, Y5 z+ Q8 b
  79. function encry($req)6 x% ], b3 i* L: Z# t1 ~
  80. {& h4 s+ P& l7 X
  81. $key = $this->getKey($req);* a' o. R. L* e! j3 c$ n
  82. $mask = "258EAFA5-E914-47DA-95CA-C5AB0DC85B11";" D) f0 K6 a# X" ~* q

  83. + k& l3 P) k" p5 r; u* }6 Q
  84. return base64_encode(sha1($key . '258EAFA5-E914-47DA-95CA-C5AB0DC85B11', true));6 V2 n, `  q4 @( i4 b
  85. }6 h$ ~1 |% Y' |6 L4 o! g
  86. $ w+ n& A$ W8 O( ^$ R3 Y
  87. function getKey($req)
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  88. {  a! p  b* A; g  G0 \
  89. $key = null;/ x2 u' o& }$ _8 l- _
  90. if (preg_match("/Sec-WebSocket-Key: (.*)\r\n/", $req, $match)) {
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  91. $key = $match[1]; # [/ F4 ?6 v$ A2 K# T, e3 X
  92. }! f6 s/ t" E# |9 ]+ W# J0 y* _# l
  93. return $key;
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  94. }# Q' Z5 B& S4 z( ?' p% U5 y2 [
  95. % H* t5 B/ _1 r$ J* U+ y! T6 \
  96. // 解析数据帧
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  97. function decode($buffer)  
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  98. {# ~% T8 a' ~& P
  99. $len = $masks = $data = $decoded = null;. ?) U- S8 u. P
  100. $len = ord($buffer[1]) & 127;
    2 L8 _6 p* c  Z) u- {
  101. ! Y4 d% p6 \7 ~  j% g) z
  102. if ($len === 126)  {2 G  T& z0 G/ R' u' e" X
  103. $masks = substr($buffer, 4, 4);
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  104. $data = substr($buffer, 8);
    " }3 C3 n; v) r/ b. G
  105. } else if ($len === 127)  {
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  106. $masks = substr($buffer, 10, 4);/ ?+ H3 a9 e, S$ x: e: j
  107. $data = substr($buffer, 14);/ t7 B0 A0 J! ~3 K$ p+ `
  108. } else  {; M8 M' F" o' G. _" F9 c: ^, b  ^
  109. $masks = substr($buffer, 2, 4);
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  110. $data = substr($buffer, 6);
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  111. }
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  112. for ($index = 0; $index < strlen($data); $index++) {  J6 G& W, g: f3 {% J2 L" f: F# L3 K
  113. $decoded .= $data[$index] ^ $masks[$index % 4];- `" _/ N$ @! h4 {- M+ b
  114. }
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  115. return $decoded;$ h4 [, G6 z, T
  116. }
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  117. : z# z8 Z* O+ C8 p3 F9 a) j
  118. // 返回帧信息处理
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  119. function frame($s) % B6 b6 f2 a( ~/ t, g  r: A5 m
  120. {6 U/ X, L! [* T1 h1 k' i
  121. $a = str_split($s, 125);
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  122. if (count($a) == 1) {; z0 r- ^  X" E0 K( ]* A  {
  123. return "\x81" . chr(strlen($a[0])) . $a[0];  X/ L0 T! n" O9 \; a
  124. }* l# v* F" E9 n
  125. $ns = "";2 G& ]! N! K, D7 B& z. \( L
  126. foreach ($a as $o) {
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  127. $ns .= "\x81" . chr(strlen($o)) . $o;) P  }; E: h* z* z3 N
  128. }
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  129. return $ns;
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  130. }
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  131. & @8 H: w& P- h- z" t
  132. // 返回数据8 x; b% v' L- d6 L+ a# L
  133. function send($client, $msg)$ K+ D5 S( G( J5 c# }4 D( j$ w
  134. {
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  135. $msg = $this->frame($msg);" K) B4 S0 s; S
  136. socket_write($client, $msg, strlen($msg));* f3 \' v- ~! z  y' x
  137. }
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  138. }
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  139. 5 O( a( j# g9 z
  140.    测试    $ws = new WS("127.0.0.1",2000);
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  141. ! e% \0 ?3 K% V, c  [9 U8 [! n
复制代码
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