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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
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  1. <html>. X/ N% u% F$ ~+ Q0 K. @9 I
  2. <head>% y/ c- @- _5 Z0 i# \
  3. <meta charset="UTF-8">+ S7 U# ], p" L6 S5 O
  4. <title>Web sockets test</title>0 j8 T1 J0 `" A6 Y
  5. <script src="jquery-min.js" type="text/javascript"></script>
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  6. <script type="text/javascript">. M: F7 @. n5 K5 q7 M4 s% n
  7. var ws;* X  L. ]3 b3 U) e% e/ ]
  8. function ToggleConnectionClicked() {         
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  9. try {3 z9 p. Q$ t! X9 ?+ V
  10. ws = new WebSocket("ws://127.0.0.1:2000");//连接服务器        
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  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);};& p3 v) ]9 d4 M# l% V
  12. ws.onmessage = function(event){alert("接收到服务器发送的数据：\r\n"+event.data);};8 n7 w+ w* `: B; p
  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！");};
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  15. } catch (ex) {
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  16. alert(ex.message);      
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  17. }, Y* ^" Z( w  Z" K/ W
  18. };0 q$ q; c. f8 A) d

  19. $ V3 N8 ^" F1 C+ e* U5 ^% _
  20. function SendData() {2 D* A( @$ B1 L/ K0 k! B: o9 r
  21. try{/ W, G" ~3 Y/ ~, N& a/ b
  22. var content = document.getElementById("content").value;
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  23. if(content){) h" F. q; i3 y9 ^1 E  T
  24. ws.send(content);1 k$ ]5 D  C; I
  25. }
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  26. 1 p- C* d# J8 {6 @2 i5 X& Y& x
  27. }catch(ex){" [$ {! r3 i7 ~9 z6 L) ]; O
  28. alert(ex.message);- i- h/ p. y6 r$ I" r. f6 H& f
  29. }
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  30. };
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  31. 1 A2 j& H+ n) ]0 @  V
  32. function seestate(){
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  33. alert(ws.readyState);
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  34. }/ H8 e7 I. L) J

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  36. </script>7 M, Y" [! h* r6 P" G! Q2 K) C
  37. </head>
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  38. <body>
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  39. <button id='ToggleConnection' type="button" onclick='ToggleConnectionClicked();'>连接服务器</button><br /><br />& N* r7 c: J* S8 F
  40. <textarea id="content" ></textarea>3 V) B9 b( _* t6 [8 E* h
  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. 9 _9 r6 R, `) @9 o
  44. </body>
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  45. </html>
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复制代码
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4 ~; e9 l# d3 Y* U7 N; L6 B2）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
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  3. var $sockets = array(); // 不同状态的 socket 管理4 i5 p2 d5 d: m& C/ E- v
  4. var $handshake = false; // 判断是否握手
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  5. 7 f9 C3 A) T0 r, `5 d$ t3 x
  6. function __construct($address, $port){! a- O3 ~9 w& z
  7. // 建立一个 socket 套接字
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  8. $this->master = socket_create(AF_INET, SOCK_STREAM, SOL_TCP)   
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  9. or die("socket_create() failed");
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  10. socket_set_option($this->master, SOL_SOCKET, SO_REUSEADDR, 1)  
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  11. or die("socket_option() failed");, m. Q2 |  ~% ]  ~$ ?& Q# D% P- H) o
  12. socket_bind($this->master, $address, $port)                    
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  13. or die("socket_bind() failed");7 s4 ]4 |* E- f! U+ F- K7 Y+ ?
  14. socket_listen($this->master, 2)                               8 P" z" P( Q8 e( ?* Z, d2 h
  15. or die("socket_listen() failed");4 A+ Q1 \9 ?6 ]0 {( I4 ~

  16. ( K9 m7 r# a0 {2 g! c3 }$ U
  17. $this->sockets[] = $this->master;
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  18. " g) v7 i: O9 A- G2 Z5 I( i
  19. // debug8 u* e" U( j  m2 o% {
  20. echo("Master socket  : ".$this->master."\n");
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  21.   X$ ~) ~, N7 k2 v6 t
  22. while(true) {
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  23. //自动选择来消息的 socket 如果是握手 自动选择主机9 l7 o4 q+ Z; ^6 J! H) W* T9 L) o# ?, j
  24. $write = NULL;
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  25. $except = NULL;
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  26. socket_select($this->sockets, $write, $except, NULL);
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  27.   S1 r: }( @+ n
  28. foreach ($this->sockets as $socket) {$ ^3 d8 K. N# m1 u( c# j, f5 E
  29. //连接主机的 client ) ?2 W: a6 V2 ^* X: h" g% @/ Z
  30. if ($socket == $this->master){
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  31. $client = socket_accept($this->master);
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  32. if ($client < 0) {
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  33. // debug5 b, C; [+ A4 R$ s: A& o
  34. echo "socket_accept() failed";" r& ~" T" J! u! b, b- \
  35. continue;
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  36. } else {
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  37. //connect($client);% i% i- y7 U7 `* t: o/ m0 \" i+ \& O* c
  38. array_push($this->sockets, $client);( J: R0 i+ V* M
  39. echo "connect client\n";+ c1 L$ W9 ^  I1 R* E0 r
  40. }
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  41. } else {
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  42. $bytes = @socket_recv($socket,$buffer,2048,0);
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  43. print_r($buffer);
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  44. if($bytes == 0) return;/ v2 j) U' y& T# {
  45. if (!$this->handshake) {9 ^: u4 ^' k( h% f
  46. // 如果没有握手，先握手回应
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  47. $this->doHandShake($socket, $buffer);
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  48. echo "shakeHands\n";6 o/ F  L& W. L% j' Y- q* h$ t7 i
  49. } else {. o7 e. ?# K# M( b$ \1 r

  50. 6 s9 A0 ~: y0 W$ y; [
  51. // 如果已经握手，直接接受数据，并处理. s& Q" }( t: r& G9 @" O2 p
  52. $buffer = $this->decode($buffer);
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  53. //process($socket, $buffer);
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  54. echo "send file\n";
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  55. }. s( D" o2 x3 j+ Q$ i% A
  56. }
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  57. }
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  58. }" ?" n0 l3 M. I
  59. }
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  60. " e! Z) F, z+ X; U! _5 E; q
  61. function dohandshake($socket, $req)* m; J; }! H1 q) U
  62. {
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  63. // 获取加密key& f7 @' o$ N2 N
  64. $acceptKey = $this->encry($req);  ?+ ~; I$ a7 r# v1 }8 [# ?
  65. $upgrade = "HTTP/1.1 101 Switching Protocols\r\n" .
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  66. "Upgrade: websocket\r\n" .
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  67. "Connection: Upgrade\r\n" .% s' @* S9 O& O6 D, t2 ~, Y9 k
  68. "Sec-WebSocket-Accept: " . $acceptKey . "\r\n" .
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  69. "\r\n";
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  70. 9 u& L' w' u( a* [' `
  71. echo "dohandshake ".$upgrade.chr(0);           
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  72. // 写入socket! B$ Z# g% _: a4 B. L* ~' a
  73. socket_write($socket,$upgrade.chr(0), strlen($upgrade.chr(0)));$ t% \& V: A$ z+ v
  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. $this->handshake = true;; w0 m5 D  r' U  p! A* n( W' J2 z
  76. }
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  77. 9 d/ q, }/ u* R6 F+ g
  78. 0 x: J' E; w5 h/ T' W7 s) h6 b
  79. function encry($req)
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  80. {( {0 c/ d" Q) Y* P4 V
  81. $key = $this->getKey($req);
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  82. $mask = "258EAFA5-E914-47DA-95CA-C5AB0DC85B11";1 g4 z% b, B& v' |: H" U' z
  83. # j+ f- }4 U- x+ ~3 R
  84. return base64_encode(sha1($key . '258EAFA5-E914-47DA-95CA-C5AB0DC85B11', true));
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  85. }
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  86. ! D( X% w% x' |0 a9 X% N) {( S
  87. function getKey($req) * r2 j7 J# b/ L6 @6 s0 k
  88. {
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  89. $key = null;" c" n7 y1 p! P8 Y/ G' S
  90. if (preg_match("/Sec-WebSocket-Key: (.*)\r\n/", $req, $match)) { 5 A: b' e, F3 ?0 ]. o4 |, q" G- g7 \
  91. $key = $match[1]; 9 P. n: W2 t3 f& B3 p
  92. }! ]) N2 a2 \; r# k! v3 t" Y) B
  93. return $key;% n4 I& ]1 v' y5 [9 M7 b7 ]+ G
  94. }
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  95. ( Y9 _% V% j: a" Y" r
  96. // 解析数据帧
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  97. function decode($buffer)  $ t* W9 p) e5 B3 h4 m) @* O3 e
  98. {: R) N" L. S( B# x1 o4 i
  99. $len = $masks = $data = $decoded = null;
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  100. $len = ord($buffer[1]) & 127;3 x6 b1 X3 H3 q9 _

  101. & a1 }; s+ e$ M. B2 t
  102. if ($len === 126)  {
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  103. $masks = substr($buffer, 4, 4);- y1 K/ N  @$ M/ j. a+ o
  104. $data = substr($buffer, 8);$ e; a6 O/ s2 m. b1 i- Y( N$ e1 [/ f
  105. } else if ($len === 127)  {
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  106. $masks = substr($buffer, 10, 4);3 @" Z& L6 Y& _3 D2 B  |
  107. $data = substr($buffer, 14);
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  108. } else  {2 l- r  I9 ~- O8 G& x
  109. $masks = substr($buffer, 2, 4);
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  110. $data = substr($buffer, 6);& A- P8 u+ _# O% [
  111. }
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  112. for ($index = 0; $index < strlen($data); $index++) {- x( T/ L+ F3 l. K! @: o
  113. $decoded .= $data[$index] ^ $masks[$index % 4];4 ]: A& O) V" O0 @
  114. }
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  115. return $decoded;) B  v2 l& c  K& d; F! T
  116. }
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  117. ' C, O* P5 w$ V: [
  118. // 返回帧信息处理
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  119. function frame($s) ( ^6 |) T* e5 B. l% V) |+ x
  120. {
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  121. $a = str_split($s, 125);/ W- o. u  ]( ?2 m' [
  122. if (count($a) == 1) {) U5 M7 }' X4 v
  123. return "\x81" . chr(strlen($a[0])) . $a[0];
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  124. }
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  125. $ns = "";
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  126. foreach ($a as $o) {) c6 n9 U( O# G
  127. $ns .= "\x81" . chr(strlen($o)) . $o;3 A# @  E  H: r* X) G
  128. }
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  129. return $ns;* T: N$ o0 ]0 y9 U' ~, T' c
  130. }
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  131. 4 Q. u# l5 |; T/ [. p- k
  132. // 返回数据2 f0 y1 P$ ^& {7 T' ~9 b
  133. function send($client, $msg)
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  134. {
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  135. $msg = $this->frame($msg);
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  136. socket_write($client, $msg, strlen($msg));
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  137. }
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  138. }
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  139. + Z7 @3 e9 x4 o7 _4 V. p; X1 e
  140.    测试    $ws = new WS("127.0.0.1",2000);" [8 _# Y5 H+ s" ~

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复制代码

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