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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>, {6 s/ D* {+ w
  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>, E  J8 G3 I( m8 ?# b8 f, a$ S
  6. <script type="text/javascript">
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  7. var ws;
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  8. function ToggleConnectionClicked() {         
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  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);};6 L  ^/ J2 t0 L1 w
  12. ws.onmessage = function(event){alert("接收到服务器发送的数据：\r\n"+event.data);};
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  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);};3 ?. |* b8 G+ |& @0 w; a8 v
  14. ws.onerror = function(event){alert("WebSocket异常！");};
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  15. } catch (ex) {
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  16. alert(ex.message);      % S1 F7 l; R2 o$ x
  17. }
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  18. };
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  19. ( H5 {- n, M2 V' [
  20. function SendData() {+ @& T7 j+ n) m3 U. C" O& s! c
  21. try{
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  22. var content = document.getElementById("content").value;$ u* q4 Q  U9 F* h
  23. if(content){. B8 \& H( a0 @: U' [
  24. ws.send(content);
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  25. }3 M& b* Q8 |7 V; m) A7 ]/ e7 O

  26. 9 N. I4 W( ]9 y1 K# K) `" o
  27. }catch(ex){
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  28. alert(ex.message);/ a2 ^) s0 j+ j* i) }3 O
  29. }8 k# \8 C3 L/ |0 R
  30. };/ x$ ?( p) s0 p; R: W, K1 G

  31. 3 n' V8 k6 I' Y
  32. function seestate(){
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  33. alert(ws.readyState);2 R' f  s  P  y% ]  A+ Z; s) j+ v0 Y
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  35. , ~; T9 `+ e  \" ~: y  R2 g( U
  36. </script>
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  37. </head>& K8 t0 S( L4 Q7 Z% w! S5 g( ~
  38. <body>/ I/ [7 F% C2 D
  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>( A; m& Q0 `7 R% T7 X1 ?* X
  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 />- v( y3 o9 M' S4 `4 Y" e

  43. ) o: F/ y( ^" N  l- U" N. ?5 T" r
  44. </body>& W- Y- g# G5 l! ]  v
  45. </html>
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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 client4 N2 t; E+ B1 n' m: t
  3. var $sockets = array(); // 不同状态的 socket 管理
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  4. var $handshake = false; // 判断是否握手
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  6. function __construct($address, $port){
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  7. // 建立一个 socket 套接字
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  8. $this->master = socket_create(AF_INET, SOCK_STREAM, SOL_TCP)   8 k  u- G. @: U1 e& A7 f' e' G
  9. or die("socket_create() failed");4 `: D0 u  j' T$ ?. m) _$ Z- H
  10. socket_set_option($this->master, SOL_SOCKET, SO_REUSEADDR, 1)  
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  11. or die("socket_option() failed");) J. |: z# r) t! z
  12. socket_bind($this->master, $address, $port)                    
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  13. or die("socket_bind() failed");
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  14. socket_listen($this->master, 2)                               : X- a6 b7 @* R$ ^/ p- W# D7 E, q
  15. or die("socket_listen() failed");
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  16. % W0 C$ q, |9 Z
  17. $this->sockets[] = $this->master;
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  19. // debug
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  20. echo("Master socket  : ".$this->master."\n");! s. X% F% k# u; \" A
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  22. while(true) {' D- v: R; t+ b8 ^! h: R$ I
  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;' }+ g- |6 u5 A& w. b6 H
  25. $except = NULL;
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  26. socket_select($this->sockets, $write, $except, NULL);
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  28. foreach ($this->sockets as $socket) {; Y: V+ G3 F- z: [1 S
  29. //连接主机的 client
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  30. if ($socket == $this->master){5 F' Y' U, x; C
  31. $client = socket_accept($this->master);
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  32. if ($client < 0) {
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  33. // debug, A$ ~  ~  y/ k/ }& _  j
  34. echo "socket_accept() failed";
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  35. continue;' B& ^! C* G7 T  r: q/ V5 a
  36. } else {# G+ o" X' {; S4 I+ c
  37. //connect($client);
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  38. array_push($this->sockets, $client);1 B$ _! V! v9 S% y
  39. echo "connect client\n";) k) |' `7 E9 \
  40. }
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  41. } else {8 A# I$ L, D& q% h2 J
  42. $bytes = @socket_recv($socket,$buffer,2048,0);$ x! l0 D' [# Y0 C6 I3 a9 T3 \
  43. print_r($buffer);( X. c/ j# G6 }6 l2 F3 K
  44. if($bytes == 0) return;2 Z/ p( Q# `8 T" u8 }
  45. if (!$this->handshake) {$ {- v1 ~7 T0 _! l' j+ j: Y
  46. // 如果没有握手，先握手回应
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  47. $this->doHandShake($socket, $buffer);( ~- a$ K2 l& T2 g
  48. echo "shakeHands\n";
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  49. } else {  A. M9 R$ v2 @% D9 J; n& C1 O( q
  50. " ^' v- w- P8 R; E% o/ g$ t; P/ S. T
  51. // 如果已经握手，直接接受数据，并处理7 `' w: D+ O7 D, G" U0 Z) \
  52. $buffer = $this->decode($buffer);
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  53. //process($socket, $buffer); 4 t- p: ?* @/ G. f3 J: q2 V* n
  54. echo "send file\n";
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  55. }$ h+ Z: K% s8 {5 P! e* a  M
  56. }% L4 ?+ E/ o, c; l8 ~+ U
  57. }
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  58. }  H5 ?; R2 @& H8 Y
  59. }
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  60. 9 }  I; O* |+ h$ H+ y" R- Q
  61. function dohandshake($socket, $req)
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  62. {2 q- i) O3 |( x  G( i
  63. // 获取加密key. v$ M: q  H# |
  64. $acceptKey = $this->encry($req);
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  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" .
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  68. "Sec-WebSocket-Accept: " . $acceptKey . "\r\n" ." P. L! b  ~( h, F1 l
  69. "\r\n";- U  D( I9 e. ]4 _: Z1 c
  70. 5 W9 U+ a# U- ]
  71. echo "dohandshake ".$upgrade.chr(0);           5 J. V0 H+ J# k4 Q
  72. // 写入socket
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  73. socket_write($socket,$upgrade.chr(0), strlen($upgrade.chr(0)));
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  74. // 标记握手已经成功，下次接受数据采用数据帧格式+ ^4 R3 b) P$ g
  75. $this->handshake = true;
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  76. }
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  77. , Y0 O- Y  ^6 r# U$ u
  78.   }2 M- |, _  X$ t- v- b% F: E
  79. function encry($req)
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  80. {, D' \9 x! m2 Z9 c
  81. $key = $this->getKey($req);
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  82. $mask = "258EAFA5-E914-47DA-95CA-C5AB0DC85B11";
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  83. 5 u) f& d: w5 B3 g0 ]
  84. return base64_encode(sha1($key . '258EAFA5-E914-47DA-95CA-C5AB0DC85B11', true));* F3 |* i4 X0 J6 v( _5 x
  85. }- h+ [! R% S/ P, w; m7 d- b
  86. * z2 ?- p  i8 O# U; H
  87. function getKey($req)
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  88. {& S$ i7 ~  U0 y& U
  89. $key = null;& m. p) t8 \7 p' E: H* K
  90. if (preg_match("/Sec-WebSocket-Key: (.*)\r\n/", $req, $match)) {
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  91. $key = $match[1];
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  93. return $key;
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  94. }
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  95. $ _. ^+ M4 t' {
  96. // 解析数据帧. L$ ?: H) X* |; T/ ^. r/ h
  97. function decode($buffer)  
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  98. {- _  `2 B1 ?. O% [6 L
  99. $len = $masks = $data = $decoded = null;; s7 }8 N8 X3 F  j% U: b9 N
  100. $len = ord($buffer[1]) & 127;* c6 _( j) V6 D1 {$ A; L- g
  101. % L, f; ^3 v6 G  y
  102. if ($len === 126)  {1 ]# @3 @7 i, a
  103. $masks = substr($buffer, 4, 4);6 v; L! o/ @, c0 X) n
  104. $data = substr($buffer, 8);5 {+ ~) @- a8 i6 ^1 @. f) I6 V
  105. } else if ($len === 127)  {, J2 O3 ?) x. Z4 q( W. P) @
  106. $masks = substr($buffer, 10, 4);' h2 O9 |, L) J) x3 {7 ^
  107. $data = substr($buffer, 14);) Z4 l$ `* ?3 B9 y3 F% P
  108. } else  {
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  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); $index++) {6 P$ A9 \* \# K( y
  113. $decoded .= $data[$index] ^ $masks[$index % 4];
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  114. }
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  115. return $decoded;+ y# S& m- ?+ D" D' @6 p/ k
  116. }7 E2 \$ T5 @+ [( `+ W3 c
  117. - P7 Y0 Q1 d+ I) ^
  118. // 返回帧信息处理
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  119. function frame($s)
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  120. {
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  121. $a = str_split($s, 125);; ?" D9 ]  j6 M
  122. if (count($a) == 1) {
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  123. return "\x81" . chr(strlen($a[0])) . $a[0];
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  124. }: I$ o0 {/ e3 r5 g1 X. ?1 Q( z
  125. $ns = "";
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  126. foreach ($a as $o) {
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  127. $ns .= "\x81" . chr(strlen($o)) . $o;
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  128. }! R. p8 n; c$ u$ M* |/ L/ f* m5 J( u# v
  129. return $ns;
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  130. }
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  131. + A. p* _- Q. l/ m( _6 c. D" T
  132. // 返回数据+ b8 r3 n* v3 I- h; b, z
  133. function send($client, $msg)7 _3 s* K+ ]3 }. ^! ?
  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. }+ ~! Y: S# O3 [4 Y0 k4 L4 C3 G+ y

  139. & @! C0 T. D% Y5 H+ }; `, k2 d; `
  140.    测试    $ws = new WS("127.0.0.1",2000);
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  141. 2 K* Y( ]% F  H
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