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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>" n5 \6 y5 a5 S
  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>( n: l* l% ^0 G8 N
  6. <script type="text/javascript">
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  7. var ws;
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  8. function ToggleConnectionClicked() {          4 a% c4 }& x% j
  9. try {; m! ~, {% @5 {0 V% s; C4 {
  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);};
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  12. ws.onmessage = function(event){alert("接收到服务器发送的数据：\r\n"+event.data);};. M# z! |2 R6 l
  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！");};7 z$ x: y; o! H' d" N  E0 h
  15. } catch (ex) {8 M7 I% q) \4 z  Q. i
  16. alert(ex.message);      ! _8 C, K& w" W; c; {; ^; V
  17. }
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  18. };+ T' O  K& d& n9 {* r  t4 \5 @

  19. 5 m/ \. W9 ], X, k7 V% O
  20. function SendData() {7 h& w$ E; {9 i7 i3 }
  21. try{
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  22. var content = document.getElementById("content").value;
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  23. if(content){8 A, V* {; @! k+ p' z2 E* s% C
  24. ws.send(content);5 U1 t( y" x6 [$ d! A
  25. }
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  26. & U& _$ b) j; R4 m' |: V; C3 x
  27. }catch(ex){( y6 N* g: |! k6 a1 D3 X% w2 f1 N
  28. alert(ex.message);3 T! b# `  E2 V/ Z
  29. }
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  30. };
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  31. / T$ E& q  S8 b" T) ~6 ]
  32. function seestate(){
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  33. alert(ws.readyState);
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  34. }
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  35. ; e$ K6 Y/ N4 U- `8 g4 ^
  36. </script>7 n  N- x! @3 p; r* N) I
  37. </head>: ~; L1 P: u2 R; z
  38. <body>
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  39. <button id='ToggleConnection' type="button" onclick='ToggleConnectionClicked();'>连接服务器</button><br /><br />6 F. _5 a6 @- w1 I. q: n
  40. <textarea id="content" ></textarea>" X8 ]) W3 l4 _! L. {- s; K% D
  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. 0 o& ~$ ]# L* Z( ~* ?2 X
  44. </body>9 O! j2 s( J; S& b! T0 G2 u
  45. </html>+ |6 ~  P8 O- a1 C3 T4 u* @1 J$ u8 e9 B
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" ^$ u9 n) Z7 Z, Y3 L5 I2）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! ^  m2 i( ~' ~, U
  3. var $sockets = array(); // 不同状态的 socket 管理) ^; f  J2 W8 p. K
  4. var $handshake = false; // 判断是否握手3 L9 D8 ]1 x4 `$ N9 Z' ]8 @* @0 }

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  6. function __construct($address, $port){5 N) y' }. r5 L) K: z( \# [
  7. // 建立一个 socket 套接字8 O, ^" u) u1 t0 B; U2 S
  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)  . r- Y  V) @9 t* e0 p
  11. or die("socket_option() failed");
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  12. socket_bind($this->master, $address, $port)                    
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  13. or die("socket_bind() failed");6 W5 W, y: Q" W0 P: U$ b$ A
  14. socket_listen($this->master, 2)                              
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  15. or die("socket_listen() failed");
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  16. ( f6 ~* z: s+ X. g9 W: |
  17. $this->sockets[] = $this->master;/ X9 Y/ l9 a: k6 m
  18. + V! R% Y: F4 t
  19. // debug
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  20. echo("Master socket  : ".$this->master."\n");% S& a7 j2 c- q8 G- \/ k- F2 z

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  22. while(true) {1 A3 @+ }: h' S8 A
  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;& s9 a% ^9 p: g/ A3 r2 X5 ?8 s
  25. $except = NULL;
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  26. socket_select($this->sockets, $write, $except, NULL);! D- a: x7 N* ^4 s

  27. 5 p  P0 D" Y, l: e
  28. foreach ($this->sockets as $socket) {5 L( V) L# I) c% w
  29. //连接主机的 client 1 v5 ~& e) B6 N$ G* `0 J0 l8 f. L
  30. if ($socket == $this->master){
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  31. $client = socket_accept($this->master);
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  32. if ($client < 0) {5 S/ V7 C$ D5 e8 b% Q* _& j4 d) F
  33. // debug1 ]) p3 j/ j2 s- y( y& {/ r2 g
  34. echo "socket_accept() failed";
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  35. continue;
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  36. } else {7 r' J' Z2 M' v
  37. //connect($client);3 T- S$ S4 F8 J& L, I
  38. array_push($this->sockets, $client);5 t; t* c  v3 }
  39. echo "connect client\n";
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  40. }4 J/ n" u' m: E# |- @( i3 @
  41. } else {* J) F" r# y! {& D
  42. $bytes = @socket_recv($socket,$buffer,2048,0);9 M/ ]* f) U) }+ Z% E
  43. print_r($buffer);" b  Z# a0 O2 P- o9 g
  44. if($bytes == 0) return;2 j4 M! A3 p5 `7 Y, p& \3 X, x
  45. if (!$this->handshake) {% ^* \+ [3 B9 d' X; d) O* Z: y. p. q
  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";
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  49. } else {
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  50. 9 o" y( B" i! p& v
  51. // 如果已经握手，直接接受数据，并处理5 m! L6 Z7 ~: R/ d- B
  52. $buffer = $this->decode($buffer);
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  53. //process($socket, $buffer);
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  54. echo "send file\n";9 J8 P+ r2 ?9 B) S
  55. }' k# e% b% b4 i0 l! e) k1 U
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  57. }6 P' e. N5 o6 Q, X
  58. }
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  59. }
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  60. 8 M, h; P) c: N/ V2 B) ]0 i2 z/ l. k
  61. function dohandshake($socket, $req)
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  62. {3 F* Z& v! {6 v! B  c8 `8 d
  63. // 获取加密key
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  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: " . $acceptKey . "\r\n" .
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  69. "\r\n";, u7 v" s. s2 p' b, i$ M* Z
  70.   e: P' W3 b) X1 K6 F" O
  71. echo "dohandshake ".$upgrade.chr(0);           
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  72. // 写入socket  v+ G- l) r& p: ~9 m) e
  73. socket_write($socket,$upgrade.chr(0), strlen($upgrade.chr(0)));9 s* e0 ^: ]+ g8 z; o
  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;
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  76. }
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  77.   o! G3 p! p5 M# ^6 E

  78. 4 A/ k2 N$ \) z9 j/ U& r- i$ i
  79. function encry($req)
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  80. {
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  81. $key = $this->getKey($req);
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  82. $mask = "258EAFA5-E914-47DA-95CA-C5AB0DC85B11";
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  83. 8 ]% s% d' h" h  ^2 f8 U
  84. return base64_encode(sha1($key . '258EAFA5-E914-47DA-95CA-C5AB0DC85B11', true));
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  85. }# u6 ^( m1 d- g. y$ h

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  87. function getKey($req)
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  89. $key = null;
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  90. if (preg_match("/Sec-WebSocket-Key: (.*)\r\n/", $req, $match)) { $ Z1 Q& G1 i: C7 o- t
  91. $key = $match[1];
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  92. }
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  93. return $key;# H; q! g6 a0 J1 `2 A- R
  94. }% `, i  c4 G9 I" G
  95. ) V6 W: \. \. z8 u: H' g) ]
  96. // 解析数据帧# B. E9 ]3 ?) S+ [# W8 e- t& Q
  97. function decode($buffer)  9 }" e5 b! P0 Q$ c1 `0 f/ |3 C
  98. {
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  99. $len = $masks = $data = $decoded = null;  n1 e# O" z' t% z
  100. $len = ord($buffer[1]) & 127;
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  101. . \7 M6 l: P) _* }6 L' @0 J
  102. if ($len === 126)  {) V1 K! P, X% _, u
  103. $masks = substr($buffer, 4, 4);2 e* N. m5 z! c) ]. h
  104. $data = substr($buffer, 8);
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  105. } else if ($len === 127)  {7 E% p; G  X0 w( d' T
  106. $masks = substr($buffer, 10, 4);# U2 D/ R  S0 _8 F4 |' ]' A
  107. $data = substr($buffer, 14);! t- C2 a( z* V- q* I
  108. } else  {# ?2 V, h6 o4 `
  109. $masks = substr($buffer, 2, 4);0 B- s  s3 b2 A( F
  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. }4 u5 r+ ^. V% ?, W
  115. return $decoded;
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  116. }( T2 t6 |: y- q+ B
  117. 0 }, C% q0 R) @) f7 M" R
  118. // 返回帧信息处理
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  119. function frame($s)
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  120. {
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  121. $a = str_split($s, 125);' |4 R0 @5 |) u  j; U
  122. if (count($a) == 1) {
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  123. return "\x81" . chr(strlen($a[0])) . $a[0];4 x1 d& l' Q( u% {! W: x% v% q  R" S
  124. }- }2 X; z2 A0 g" o& x
  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 $ns;
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  130. }
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  131. ! X( J/ u1 H, Q- f7 S
  132. // 返回数据
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  133. function send($client, $msg), L3 C7 S  Y7 g  r0 y- L- w
  134. {6 v. y( u, {. B/ i) m; V4 F3 x" ~0 B2 k
  135. $msg = $this->frame($msg);
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  136. socket_write($client, $msg, strlen($msg));
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  137. }7 Z7 k, I# r  Y9 d9 M; b8 m2 ?
  138. }
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  139. ) H9 R% o4 I9 B% k( N5 A+ \
  140.    测试    $ws = new WS("127.0.0.1",2000);
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  141. , ]' I: A8 ^5 [  F% B  X& Q
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