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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5 Y6 j: Z# v& ?- w5 ~- O9 X+ \
  1. <html>
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  2. <head>0 w, l+ o# c3 A+ }, b0 k* G1 |
  3. <meta charset="UTF-8">
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  4. <title>Web sockets test</title>9 v5 v3 k: m5 x/ D! }% f0 r% F
  5. <script src="jquery-min.js" type="text/javascript"></script>* u3 U/ g; q- f
  6. <script type="text/javascript">+ X. `, w( y  Y# I) M  O9 y; G
  7. var ws;$ b- V& U2 a+ T2 r$ d/ k
  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        / m- `/ {+ e" r. ?
  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);};3 J3 r) f. u1 p% ?6 f, q6 p) h
  12. ws.onmessage = function(event){alert("接收到服务器发送的数据：\r\n"+event.data);};( T; [1 {' V4 c, j4 l6 ^
  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！");};1 M! m3 Q0 V5 Y4 n1 v
  15. } catch (ex) {
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  16. alert(ex.message);      
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  17. }
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  18. };: X4 r; y: V. Q+ x, F3 f5 ]
  19. * ~$ a/ a, g: e
  20. function SendData() {( ^* f' `) d8 S. y6 a+ u+ X6 ~$ _' o
  21. try{: k% {% i2 h9 }4 e) S
  22. var content = document.getElementById("content").value;( |( [( H1 ~: G6 d
  23. if(content){* f5 w8 I( u4 n
  24. ws.send(content);" R* g9 j  v) d# g; [  }7 g  a
  25. }) |7 G- @% B/ i% `
  26. 0 ]+ u/ r6 |" t$ i9 k" g
  27. }catch(ex){. z( }3 g) _3 y' ~
  28. alert(ex.message);  t& k  T+ N/ j- K/ v4 S1 h
  29. }
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  30. };+ i" s4 r. @# t6 g* J3 G

  31. 5 L" y- d& M4 q% D, F" G
  32. function seestate(){/ _% i) E; P, J  E, Q
  33. alert(ws.readyState);6 N) Z# O1 L5 \. x% d* ?
  34. }
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  35. " ?9 ]6 p, y: ?0 \: V1 p7 N+ g: a
  36. </script>! d) {! T4 l* {$ @
  37. </head># x8 U+ d0 g$ l" ]2 b# V) `. h
  38. <body>" h( M. M: ^3 K5 `; W8 l5 V, W# m
  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>5 Y# W  B. F; a2 W6 b( m
  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 />' M& j7 W! n7 e- _- {4 G$ h

  43.   G2 n5 D2 a2 |0 j+ S
  44. </body>& G" s; C: l0 b* e5 h6 w; I
  45. </html>
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6 j; X# M, S- G6 Q- ^2 U2）服务器端实现
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  1. class WS {
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  2. var $master;  // 连接 server 的 client. z4 j$ I5 A3 f3 S! _* `
  3. var $sockets = array(); // 不同状态的 socket 管理
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  4. var $handshake = false; // 判断是否握手
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  5. / P- m, B# n% A; V3 c- `
  6. function __construct($address, $port){
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  7. // 建立一个 socket 套接字
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  8. $this->master = socket_create(AF_INET, SOCK_STREAM, SOL_TCP)   : n  K2 x2 z! U. B) K
  9. or die("socket_create() failed");3 ^# b* m" {- W8 V" I& [
  10. socket_set_option($this->master, SOL_SOCKET, SO_REUSEADDR, 1)  
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  11. or die("socket_option() failed");: z: ?- t# r- P) l! k4 B
  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");6 X3 o' g4 r! k# }) v2 p

  16. % H/ C2 `/ @/ C
  17. $this->sockets[] = $this->master;
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  18. 7 i$ @1 f, V( e% u5 ]% n
  19. // debug
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  20. echo("Master socket  : ".$this->master."\n");6 T3 B! f  i$ ?: p9 H
  21. + Y4 ]+ h$ B. x0 ~+ w3 O; m  V
  22. while(true) {6 u1 f' `" \/ O% p6 Q& ?# e7 o6 f
  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. $except = NULL;$ j9 h/ E! f0 @! C! M* i
  26. socket_select($this->sockets, $write, $except, NULL);, [" I: R$ t" k6 s

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  28. foreach ($this->sockets as $socket) {
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  29. //连接主机的 client
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  30. if ($socket == $this->master){
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  31. $client = socket_accept($this->master);
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  32. if ($client < 0) {
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  33. // debug
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  34. echo "socket_accept() failed";
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  35. continue;2 V+ P4 z  Z+ K1 T. _: m
  36. } else {
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  37. //connect($client);$ X1 O" `& m* g, T$ \
  38. array_push($this->sockets, $client);! V) }% m! p8 o  \" d5 V  ~0 b
  39. echo "connect client\n";# ?8 D( [- z9 Y7 y4 e& ?
  40. }2 u# P& P2 e# `5 ?' L
  41. } else {& V! f6 X' t+ k7 Y- f2 ^1 h5 [
  42. $bytes = @socket_recv($socket,$buffer,2048,0);/ m  H7 b4 Q9 H* P4 ]2 {
  43. print_r($buffer);! f# Q7 y' q& ]- F  ~
  44. if($bytes == 0) return;& l- h( s4 w, a3 P+ q
  45. if (!$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);3 u( r* C1 a( _& v5 u5 `
  48. echo "shakeHands\n";
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  49. } else {
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  50. 7 e0 l. L7 w8 H) `4 y
  51. // 如果已经握手，直接接受数据，并处理
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  52. $buffer = $this->decode($buffer);
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  53. //process($socket, $buffer); ) F1 O' H  y1 R/ U+ U& L, L
  54. echo "send file\n";
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  55. }
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  56. }5 V. \/ M8 Y. @  T
  57. }: m' b2 u. j; C2 m# ^
  58. }0 I1 b( i' b: \$ p! b" O( v1 Z( m
  59. }
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  60. - C! W! b+ @8 u( H  f, g
  61. function dohandshake($socket, $req)
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  62. {# F6 A( c# q1 B
  63. // 获取加密key
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  64. $acceptKey = $this->encry($req);6 T) K6 J; R) L/ N/ W
  65. $upgrade = "HTTP/1.1 101 Switching Protocols\r\n" .
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  66. "Upgrade: websocket\r\n" .; y1 f: i! i; Q1 w4 m
  67. "Connection: Upgrade\r\n" .
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  68. "Sec-WebSocket-Accept: " . $acceptKey . "\r\n" .
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  69. "\r\n";. v/ S: f# z# \9 N4 w$ L. H- O

  70. ' ?5 p; X! Y4 R; n2 ?" R
  71. echo "dohandshake ".$upgrade.chr(0);           
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  72. // 写入socket9 K4 I' Q3 {$ A+ n7 b+ p. T2 l
  73. socket_write($socket,$upgrade.chr(0), strlen($upgrade.chr(0)));4 b) h2 c5 @+ V4 p3 X4 l
  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. $this->handshake = true;
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  76. }
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  77. : p$ d( d' k) H
  78. 6 A& L- D+ R6 g$ i& ]  U3 c% P. T, s
  79. function encry($req)) E& Q+ d6 s4 v
  80. {& s% f  P# E+ x& @5 [3 t. E0 `
  81. $key = $this->getKey($req);+ y2 e9 u" U/ u) y/ V) j# f3 U: K
  82. $mask = "258EAFA5-E914-47DA-95CA-C5AB0DC85B11";
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  83. 6 g$ _# z$ K# O: Q" o* q# L
  84. return base64_encode(sha1($key . '258EAFA5-E914-47DA-95CA-C5AB0DC85B11', true));6 R4 j9 N) a7 M. q2 A
  85. }
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  86. 0 i& I4 i  K1 G. m# Q
  87. function getKey($req)
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  88. {
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  89. $key = null;
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  90. if (preg_match("/Sec-WebSocket-Key: (.*)\r\n/", $req, $match)) {
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  91. $key = $match[1]; ; G4 ^9 p# d/ D( i
  92. }
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  93. return $key;/ y0 p5 s. o$ ~1 |; h. N3 |* ^
  94. }
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  95. " W7 t; y2 X* d' B5 k
  96. // 解析数据帧. i. d! g. I/ n9 O1 C2 `8 Q
  97. function decode($buffer)  . S7 f* `2 u- p% k
  98. {
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  99. $len = $masks = $data = $decoded = null;) A1 {1 k' D# S( e% X  p0 Q* N; X
  100. $len = ord($buffer[1]) & 127;( x! o/ O  R6 k) _0 A
  101. - n( h* p$ Z( }$ g
  102. if ($len === 126)  {
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  103. $masks = substr($buffer, 4, 4);
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  104. $data = substr($buffer, 8);
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  105. } else if ($len === 127)  {& W& L  q' I1 y( H/ ?
  106. $masks = substr($buffer, 10, 4);
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  107. $data = substr($buffer, 14);
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  108. } else  {: C  H7 I% z/ O# Y' _0 f
  109. $masks = substr($buffer, 2, 4);7 R+ ~5 r& j& S
  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];  w- d7 `9 b' w4 [. g9 r
  114. }
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  115. return $decoded;
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  116. }
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  117. $ _5 v& {- {3 P
  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);
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  122. if (count($a) == 1) {
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  123. return "\x81" . chr(strlen($a[0])) . $a[0];
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  124. }4 [4 D) _7 h0 Q) T* R
  125. $ns = "";' P) t% \5 V  f( F
  126. foreach ($a as $o) {( E1 }' M# v9 ?6 P, A- n9 B! }2 k5 y
  127. $ns .= "\x81" . chr(strlen($o)) . $o;
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  128. }
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  129. return $ns;2 K5 ?& Z8 |7 l  h6 t. a
  130. }( ~, F* X/ x, _% K" J, W* G

  131. , [* |& `1 L- K8 G
  132. // 返回数据
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  133. function send($client, $msg)5 R" P+ i& G3 R* o( h$ _
  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. ( d. I# A9 O! l, d8 z+ K+ t
  140.    测试    $ws = new WS("127.0.0.1",2000);3 F7 y( P! l; J/ E( d, _
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