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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>
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  2. <head>
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  3. <meta charset="UTF-8">6 L1 `7 n) `% l2 P* b! F- T1 ^  T
  4. <title>Web sockets test</title>' s: l3 L3 j  M+ n; y7 T) K
  5. <script src="jquery-min.js" type="text/javascript"></script>
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  6. <script type="text/javascript">. X6 @% {5 s, J7 D1 _0 g6 w
  7. var ws;
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  8. function ToggleConnectionClicked() {          # e, c- N5 ]% ^
  9. try {
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  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);};) Y! S2 U5 J% m, ~; T' p+ p( Z5 y3 p
  12. ws.onmessage = function(event){alert("接收到服务器发送的数据：\r\n"+event.data);};! v3 h% w* Y' S
  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);};, i! T+ `7 H3 ^& J9 l, v9 s. I
  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. }
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  18. };$ i; @$ h. _: d1 e

  19. 2 T: K  N% a! u+ l- x6 {
  20. function SendData() {
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  21. try{
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  22. var content = document.getElementById("content").value;
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  23. if(content){3 `0 R% Y4 K/ W/ f7 W! n
  24. ws.send(content);
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  25. }
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  26. ( {% I  H8 H4 A% A- U/ `# i' u
  27. }catch(ex){, t% J) U! s. C. @) D
  28. alert(ex.message);$ m8 j* d! x) D' ^/ g
  29. }1 M' Y) `* k5 o2 [) E8 ~# ~, Y7 {. Y
  30. };2 h' ?2 K3 E/ t8 X1 g; \; B

  31. / K4 Q5 ?( M& J) ]  |6 _7 J5 Q
  32. function seestate(){
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  33. alert(ws.readyState);
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  34. }
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  35. . v) f3 K/ C& |7 f) {, E
  36. </script>
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  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 />
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  40. <textarea id="content" ></textarea>7 y8 I; t6 D7 H  ]( @$ ~! h+ E' m
  41. <button id='ToggleConnection' type="button" onclick='SendData();'>发送我的名字：beston</button><br /><br />1 r- j, S# E: F8 r- j& A- G
  42. <button id='ToggleConnection' type="button" onclick='seestate();'>查看状态</button><br /><br />
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  43.   Z* W' K  V. x* B
  44. </body>) h- C# l  b; v
  45. </html>
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2）服务器端实现! D7 m  V# }6 L9 `- `

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  1. class WS {( b8 j: g: i4 r' O1 N& o; {( L
  2. var $master;  // 连接 server 的 client
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  3. var $sockets = array(); // 不同状态的 socket 管理! w" j# s! _5 s) i! C& q$ s
  4. var $handshake = false; // 判断是否握手
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  6. function __construct($address, $port){
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  7. // 建立一个 socket 套接字; Z: n, M* u# w; e
  8. $this->master = socket_create(AF_INET, SOCK_STREAM, SOL_TCP)   
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  9. or die("socket_create() failed");  O) R' k8 D! |$ r: V, f, {* X
  10. socket_set_option($this->master, SOL_SOCKET, SO_REUSEADDR, 1)  
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  11. or die("socket_option() failed");4 D8 _* o' H2 S. L5 P' W
  12. socket_bind($this->master, $address, $port)                    
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  13. or die("socket_bind() failed");
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  14. socket_listen($this->master, 2)                              
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  15. or die("socket_listen() failed");
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  16. 0 K6 d  Y# J4 ~4 I$ [, i: g
  17. $this->sockets[] = $this->master;9 {2 L" K, A+ n% m
  18. 3 ^) H; C; Z. W( }) J7 k
  19. // debug7 ^" T0 W! F8 s( `# \- E3 _
  20. echo("Master socket  : ".$this->master."\n");
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  21. 0 j* S* a: I+ I" S, L. Z
  22. while(true) {: E* k8 ]% j6 v0 }4 O6 L+ }
  23. //自动选择来消息的 socket 如果是握手 自动选择主机
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  24. $write = NULL;5 p5 Y0 L6 C) v
  25. $except = NULL;
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  26. socket_select($this->sockets, $write, $except, NULL);
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  28. foreach ($this->sockets as $socket) {& x/ Z  E0 m1 @
  29. //连接主机的 client
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  30. if ($socket == $this->master){) @( ]6 n! `& U- x, H
  31. $client = socket_accept($this->master);
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  32. if ($client < 0) {$ I6 r/ p: J/ H  Z1 m
  33. // debug* f" O) l: N& A- i" z- `8 ]1 Y* @2 O
  34. echo "socket_accept() failed";$ e7 p- f( H8 P
  35. continue;
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  36. } else {3 t; ~. J3 X& _' v1 C7 d& f
  37. //connect($client);0 d+ R1 o  ]- Z/ A( i2 G
  38. array_push($this->sockets, $client);
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  39. echo "connect client\n";
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  40. }% e, |" c) h% c
  41. } else {
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  42. $bytes = @socket_recv($socket,$buffer,2048,0);
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  43. print_r($buffer);4 \, i4 f# v7 A) c/ z
  44. if($bytes == 0) return;, l$ P, u- h5 n5 B+ e, k0 ^( l
  45. if (!$this->handshake) {! S- o5 a( e' E. e2 a
  46. // 如果没有握手，先握手回应/ b6 p9 F# Q1 P: B8 O* f
  47. $this->doHandShake($socket, $buffer);
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  48. echo "shakeHands\n";
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  49. } else {
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  50. 8 A3 n, b! W, \& S4 K
  51. // 如果已经握手，直接接受数据，并处理: ~6 a' d& v+ u
  52. $buffer = $this->decode($buffer);
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  53. //process($socket, $buffer);
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  54. echo "send file\n";
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  55. }
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  56. }
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  57. }4 \9 J! r  H. F- v7 x$ q: }5 I
  58. }" v/ v3 ~4 w7 U% w8 ~/ C* V0 K
  59. }! I1 H. {& i9 _2 P  Y8 y
  60. $ z8 M; b4 J4 `
  61. function dohandshake($socket, $req)) R, x& f) A8 ]7 B
  62. {6 g$ U" h5 b- S) K% l
  63. // 获取加密key- x+ B, g5 j9 y
  64. $acceptKey = $this->encry($req);1 t: Z% i; l- a) c, K
  65. $upgrade = "HTTP/1.1 101 Switching Protocols\r\n" .* X, T: r( r6 `- k6 H. y
  66. "Upgrade: websocket\r\n" .0 ]9 i7 E" J# T4 C
  67. "Connection: Upgrade\r\n" .6 q7 j. x1 J) j2 K8 i9 d7 z
  68. "Sec-WebSocket-Accept: " . $acceptKey . "\r\n" .# J4 E  `) H7 [7 _
  69. "\r\n";
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  70. 8 |5 Z0 M$ E' `# P# ^- n
  71. echo "dohandshake ".$upgrade.chr(0);           
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  72. // 写入socket; T4 S/ c7 h9 [* p, X' v7 `" W9 U. J: v
  73. socket_write($socket,$upgrade.chr(0), strlen($upgrade.chr(0)));7 s$ E, z' ?) \) j6 t1 e
  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. $this->handshake = true;$ D/ N5 X# P2 p  \5 V% b- ^
  76. }
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  77. 8 j. b5 R; z$ |) |0 r6 P5 k

  78. 5 X7 D' c2 l3 B9 a( t5 u+ g% |
  79. function encry($req)
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  80. {
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  81. $key = $this->getKey($req);
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  82. $mask = "258EAFA5-E914-47DA-95CA-C5AB0DC85B11";
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  83. - o- v6 R3 O# ]% P6 f9 F
  84. return base64_encode(sha1($key . '258EAFA5-E914-47DA-95CA-C5AB0DC85B11', true));
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  85. }6 s% ~( i8 M1 t% [2 V) f$ S
  86. 6 k! u% o0 a3 P: b' r% H- J5 g+ T
  87. function getKey($req)   R+ l, B( T$ I1 E$ u% x
  88. {
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  89. $key = null;
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  90. if (preg_match("/Sec-WebSocket-Key: (.*)\r\n/", $req, $match)) { , `& L3 p3 q) l
  91. $key = $match[1]; ( n8 R! f9 {. B& W4 @* S  s$ R# L
  92. }- Z6 c. U, P  B* m4 j8 K: T
  93. return $key;
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  94. }/ I1 `( c" t& A: x8 k

  95. 4 E% K8 \) P+ A" l) k( R2 m" M& y8 }9 s
  96. // 解析数据帧
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  97. function decode($buffer)  & Z9 G* s1 j  L* V2 f
  98. {
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  99. $len = $masks = $data = $decoded = null;7 V, `5 a2 a$ D+ U8 l
  100. $len = ord($buffer[1]) & 127;" b+ A& w$ G- H: v3 I( M- q

  101. : n# W( T( |9 i; z$ I, `! `( h
  102. if ($len === 126)  {
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  103. $masks = substr($buffer, 4, 4);
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  104. $data = substr($buffer, 8);' B; P9 y. `9 L
  105. } else if ($len === 127)  {% j; R, c- ~& I# K/ X* t2 U# \. r
  106. $masks = substr($buffer, 10, 4);
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  107. $data = substr($buffer, 14);
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  108. } else  {" [* X" a0 }7 c4 q6 i
  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++) {
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  113. $decoded .= $data[$index] ^ $masks[$index % 4];
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  114. }
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  115. return $decoded;
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  116. }. S$ L( D+ l* O5 v/ i" `
  117. ; i; D+ _1 n% t" B  y+ a8 G
  118. // 返回帧信息处理( U. c0 X* N& u9 D2 n2 |5 t
  119. function frame($s)
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  120. {4 Q. ]7 x0 R  y. H
  121. $a = str_split($s, 125);+ Y) l$ r) ~+ C
  122. if (count($a) == 1) {1 }7 s9 F: V) M8 D
  123. return "\x81" . chr(strlen($a[0])) . $a[0];- w3 j2 v2 v6 d2 @! ]2 E4 {! f5 I
  124. }# J& _' u2 z5 l, _/ A+ @
  125. $ns = "";
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  126. foreach ($a as $o) {
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  127. $ns .= "\x81" . chr(strlen($o)) . $o;
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  128. }
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  129. return $ns;
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  130. }% `3 x' K4 N3 W9 n- W

  131. . b! U2 B) _% U) C& j) m
  132. // 返回数据) B$ x7 O" ^9 ]6 Z
  133. function send($client, $msg); k& K, E& ], a/ c0 ~
  134. {1 F5 T5 l# J  B8 ^( S; H0 X5 ~/ z; g
  135. $msg = $this->frame($msg);
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  136. socket_write($client, $msg, strlen($msg));
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  137. }/ q  Z# n( C! }4 A
  138. }1 D! Y; p" P- U/ a
  139. " x+ z+ P  i1 D) ~7 p4 ]
  140.    测试    $ws = new WS("127.0.0.1",2000);
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