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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>+ y: ~1 O4 @/ d8 x4 K
  2. <head>
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  3. <meta charset="UTF-8">  x9 h4 P6 ^+ E+ ]8 ~4 J  N- G/ ?
  4. <title>Web sockets test</title>+ A* H# H( ^3 F7 [5 Z/ u
  5. <script src="jquery-min.js" type="text/javascript"></script>; z. o- F: F7 v( r$ T) V9 q# w4 q5 G
  6. <script type="text/javascript">
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  7. var ws;
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  8. function ToggleConnectionClicked() {          % A3 a5 X+ s6 j7 t! e( Z
  9. try {$ M5 ~$ z, y$ d0 \  j8 |; j* i) Z8 }4 j
  10. ws = new WebSocket("ws://127.0.0.1:2000");//连接服务器        / v) |) i: `+ G: v# o9 c
  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);};' C" O& X$ k' S2 [
  12. ws.onmessage = function(event){alert("接收到服务器发送的数据：\r\n"+event.data);};4 f8 s5 n# j! n5 h( X$ @" f( n6 o8 e
  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！");};2 u+ [' o& [5 |% D7 ^* t
  15. } catch (ex) {
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  16. alert(ex.message);      
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  17. }
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  18. };
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  19. / W6 f, z" t- ?2 A
  20. function SendData() {# u4 _7 M/ y8 d) X' T" M  L
  21. try{
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  22. var content = document.getElementById("content").value;% R5 F1 _* q' F) \. x* p
  23. if(content){
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  24. ws.send(content);
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  25. }( }1 `9 O# L$ O

  26. ' f' Q8 o8 ~( E$ w! D0 w3 P7 E
  27. }catch(ex){
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  28. alert(ex.message);
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  29. }
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  30. };
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  31. 9 C6 @/ @4 L5 G3 c% U/ D. s* m
  32. function seestate(){
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  33. alert(ws.readyState);( N5 L- G( [' {  C' J7 R
  34. }7 R  V# h7 e" X0 t, j; I1 v4 ^

  35. ( b& n: ~; p- a- ]5 ^) c
  36. </script>
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  37. </head>
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  38. <body>! s' u1 O* U; B9 [" a
  39. <button id='ToggleConnection' type="button" onclick='ToggleConnectionClicked();'>连接服务器</button><br /><br />2 p3 ]1 I* [" Z! z6 A) z
  40. <textarea id="content" ></textarea>* F. W  d% @/ W% H2 q
  41. <button id='ToggleConnection' type="button" onclick='SendData();'>发送我的名字：beston</button><br /><br />/ y$ P% H9 q$ W7 q% i
  42. <button id='ToggleConnection' type="button" onclick='seestate();'>查看状态</button><br /><br />
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  43. ! w$ e* y) b) Y% T, o' s' t! A: E
  44. </body>7 ]- v' x" L# D8 U. `- k, d- b
  45. </html>
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复制代码
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8 P) W: ]7 @  f2）服务器端实现+ U- R6 H# K2 j. u) f( W. x

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  1. class WS {
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  2. var $master;  // 连接 server 的 client4 f$ s7 V2 G! \$ m7 l0 H
  3. var $sockets = array(); // 不同状态的 socket 管理0 ~/ c* q' M  l, o
  4. var $handshake = false; // 判断是否握手
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  5. & p  G$ M( y1 u! S5 A
  6. function __construct($address, $port){- {/ n5 v( L" p
  7. // 建立一个 socket 套接字
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  8. $this->master = socket_create(AF_INET, SOCK_STREAM, SOL_TCP)   : Y5 `, S& c' i/ e+ a
  9. or die("socket_create() failed");+ S! C+ X6 t5 g7 N1 i  w+ ^6 |
  10. socket_set_option($this->master, SOL_SOCKET, SO_REUSEADDR, 1)  
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  11. or die("socket_option() failed");
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  12. socket_bind($this->master, $address, $port)                    $ S3 [, A: v6 ~/ \! A! d
  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. " Y0 a  X+ t8 _& N
  17. $this->sockets[] = $this->master;3 C3 m. z7 X: ~/ O% h6 L% ^

  18. 2 M( C* H- E! f
  19. // debug5 J! W( n4 K; |4 m2 G) }1 H5 }
  20. echo("Master socket  : ".$this->master."\n");
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  21. 7 W7 `5 [! D, q
  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
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  24. $write = NULL;
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  25. $except = NULL;. W# t( o5 ~0 b* q
  26. socket_select($this->sockets, $write, $except, NULL);& S# [, A- f1 {

  27. 3 g0 w) P- o4 P8 r: i
  28. foreach ($this->sockets as $socket) {
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  29. //连接主机的 client 7 b; F4 ~5 R. x4 `0 q' W' a' r, Y
  30. if ($socket == $this->master){# E" l. L  _2 b! r* o' g$ M
  31. $client = socket_accept($this->master);9 d/ X, ]. M4 E: ~' J) u  d" S* g
  32. if ($client < 0) {, H+ M3 ?! L5 \5 \: J
  33. // debug6 Z' `6 I. y  [5 j$ i1 W0 S; b
  34. echo "socket_accept() failed";$ W* D* A  N* p. k4 i; c5 T# O7 o5 A3 Q
  35. continue;7 h" S# f/ X+ f* b2 h2 ?
  36. } else {8 B' P4 s7 n) G8 a* P) `& g
  37. //connect($client);8 n# ^! |/ |% `8 {  E8 u% S$ }+ @
  38. array_push($this->sockets, $client);
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  39. echo "connect client\n";
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  40. }
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  41. } else {9 V) {4 l6 W$ @0 `
  42. $bytes = @socket_recv($socket,$buffer,2048,0);' m+ s/ R6 X- I* x
  43. print_r($buffer);" f: A% B! C7 U1 @/ Y! Y% Z
  44. if($bytes == 0) return;+ f. Q% n6 b5 `/ P* V1 J
  45. if (!$this->handshake) {
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  46. // 如果没有握手，先握手回应
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  47. $this->doHandShake($socket, $buffer);
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  48. echo "shakeHands\n";
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  49. } else {
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  50. * _5 R+ i2 y$ e% L  {
  51. // 如果已经握手，直接接受数据，并处理7 H: T; r, q: U! I+ U4 I
  52. $buffer = $this->decode($buffer);
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  53. //process($socket, $buffer); 6 y0 ]  B  n0 m$ }0 v) b* Q# U
  54. echo "send file\n";
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  55. }9 g5 A; L+ C% R3 v6 E, `
  56. }
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  57. }
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  58. }7 ]; W- f  I& \6 b4 N9 D
  59. }- L, f8 g% E: S! m8 A

  60. 5 K4 ?6 f5 z& V( j
  61. function dohandshake($socket, $req)6 l5 X- l" D. b# R+ j
  62. {
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  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" .: @& m% H, z! Z7 G( Y4 o/ x. w
  66. "Upgrade: websocket\r\n" .
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  67. "Connection: Upgrade\r\n" ., D  q3 ~* P" a. i
  68. "Sec-WebSocket-Accept: " . $acceptKey . "\r\n" .4 l# s, K3 y. O% [# i  O% o6 s
  69. "\r\n";* n6 ?% E% e- E7 t: h) a# e

  70. 6 k0 v0 a. Q  h0 e2 i/ T
  71. echo "dohandshake ".$upgrade.chr(0);           
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  72. // 写入socket
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  73. socket_write($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" @, ~! y1 W9 T
  75. $this->handshake = true;8 u9 v, ^5 I" r+ y0 r
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  77. ) O0 B& k1 _7 k2 s0 V& l

  78. * t& r4 I* f$ L! G1 q
  79. function encry($req)
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  80. {
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  81. $key = $this->getKey($req);
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  82. $mask = "258EAFA5-E914-47DA-95CA-C5AB0DC85B11";
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  83.   V1 O3 S/ U; }; C3 C
  84. return base64_encode(sha1($key . '258EAFA5-E914-47DA-95CA-C5AB0DC85B11', true));" R6 y+ L8 }6 v6 u
  85. }# ]; F8 G8 \  w7 \/ _% n) @

  86. : J1 G! I% }  Z
  87. function getKey($req)
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  88. {! A; f+ k5 x1 R6 d  t
  89. $key = null;+ c: `; {  E9 I  |# D/ V
  90. if (preg_match("/Sec-WebSocket-Key: (.*)\r\n/", $req, $match)) { * [. Z5 `5 j! s1 M/ e+ E% O
  91. $key = $match[1];
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  92. }7 L/ i! G4 d+ b6 N4 K5 M8 T
  93. return $key;1 [. h- [6 r4 a: f5 |: o
  94. }  ~6 }+ H# B$ Y, a4 x" H8 F) t8 f. q

  95.   C) P! j4 E9 C. V9 N% N, o3 Z
  96. // 解析数据帧
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  97. function decode($buffer)  
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  98. {  K, X, N% C/ a% h3 ?5 x
  99. $len = $masks = $data = $decoded = null;
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  100. $len = ord($buffer[1]) & 127;  C. w) A' W3 j: _- C
  101.   |5 }& q. \- t, Z7 h) @$ _/ `4 ^
  102. if ($len === 126)  {; D2 ~# |8 M/ l% _% v. L5 z( m
  103. $masks = substr($buffer, 4, 4);7 x' ~2 ]* q; x( _' k9 `
  104. $data = substr($buffer, 8);
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  105. } else if ($len === 127)  {/ `3 a% w* I2 n' Q6 u/ Z
  106. $masks = substr($buffer, 10, 4);
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  107. $data = substr($buffer, 14);
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  108. } else  {6 ?" A. _, x+ P$ M: t
  109. $masks = substr($buffer, 2, 4);0 G9 B! m2 {4 B) c' p/ e
  110. $data = substr($buffer, 6);! D% j2 ~" }2 \4 K0 v6 x3 e4 k
  111. }7 R. G' x/ }' r, P" J' f
  112. for ($index = 0; $index < strlen($data); $index++) {, \8 G1 _0 B: W6 ]6 G! x6 w0 a
  113. $decoded .= $data[$index] ^ $masks[$index % 4];2 o" S( x+ P* v7 ^( a
  114. }/ _* r) k) t0 i! C- S6 G
  115. return $decoded;& \+ w# n1 R+ X1 S; C$ @( v
  116. }
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  117. 5 ]  U3 H% O9 s, z: |+ @4 Q: B
  118. // 返回帧信息处理
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  119. function frame($s) 8 Z! u/ S9 N: I1 w+ O& m
  120. {
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  121. $a = str_split($s, 125);
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  122. if (count($a) == 1) {, V) C  k2 k) a
  123. return "\x81" . chr(strlen($a[0])) . $a[0];, i6 P3 f8 [0 U0 [9 ~, l# Y
  124. }, f$ U+ M* x; F# J
  125. $ns = "";
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  126. foreach ($a as $o) {1 N! T( V7 C; o
  127. $ns .= "\x81" . chr(strlen($o)) . $o;0 Q. {. |! C' b! G6 F
  128. }
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  129. return $ns;( l* [: R8 s* }7 M  }
  130. }
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  131. & L* `- s$ V  f) R
  132. // 返回数据
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  133. function send($client, $msg)
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  134. {$ G" A; @0 E& [% G4 k2 h2 N1 g% L$ L8 a
  135. $msg = $this->frame($msg);1 A- H0 w# R9 p
  136. socket_write($client, $msg, strlen($msg));2 X6 E( Y0 b# g  {5 a
  137. }
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  138. }1 `# `+ W: U; t

  139. ) N5 D- K7 M3 R/ J; o6 |
  140.    测试    $ws = new WS("127.0.0.1",2000);
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  141. 4 ]. }. s# k; k4 ]# g5 `
复制代码

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