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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, k6 q4 s5 B2 S7 M) Z7 ?1 `4 P
  1. <html>" f: h) r( U. T  ~: h; A3 R/ p9 O
  2. <head>& J8 m+ E2 @- j+ X. c' h- P( J8 z
  3. <meta charset="UTF-8">4 z: M# d; ]2 Y$ c2 h# e$ U
  4. <title>Web sockets test</title>
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  5. <script src="jquery-min.js" type="text/javascript"></script>
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  6. <script type="text/javascript">7 W! P" x+ r: {0 Z% H0 H
  7. var ws;/ h; Z1 }3 q/ z5 ]% G
  8. function ToggleConnectionClicked() {         
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  9. try {' [* p& z1 |# E( d, [% B9 a
  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);};2 c: g; F8 h) \8 F1 \
  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);};9 A( o( E; w+ j+ _) M% a$ V
  14. ws.onerror = function(event){alert("WebSocket异常！");};
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  15. } catch (ex) {0 m1 R5 w0 p: G
  16. alert(ex.message);      
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  17. }6 ?% O: o' e, K
  18. };# A7 G/ V' R2 y* S, _

  19. , n4 M- p- A/ |$ R
  20. function SendData() {1 k5 ?+ |6 \& M2 B  @- V4 A# _
  21. try{
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  22. var content = document.getElementById("content").value;! r" W' O" }0 {0 j+ q; U
  23. if(content){
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  24. ws.send(content);5 {' j1 F- a' K9 U) w
  25. }
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  26. 0 ~; F( v0 v! [* ?% I
  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. / E+ `* I  w- n: j: L! F6 h* f
  32. function seestate(){- L, ]/ A5 Y: a5 C
  33. alert(ws.readyState);
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  34. }" X  y% c) S7 \) ^$ |6 e

  35. 7 ~( R5 {. u8 p) _
  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>
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  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 />' r! e+ N# I) a( P: ?! L

  43. $ H/ ?& E; {6 m; B* \( \& I
  44. </body>7 s0 v, H- D1 ?. a- {- j) [
  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 $master;  // 连接 server 的 client! a$ t/ A6 Z2 j& c
  3. var $sockets = array(); // 不同状态的 socket 管理+ ]: U$ b/ T  L9 L
  4. var $handshake = false; // 判断是否握手8 _) F/ B3 u" ^5 e8 c' t% V
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  6. function __construct($address, $port){
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  7. // 建立一个 socket 套接字- K+ \2 ?8 e$ f; b8 E
  8. $this->master = socket_create(AF_INET, SOCK_STREAM, SOL_TCP)   
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  9. or die("socket_create() failed");* ]1 u; f% N# e4 f
  10. socket_set_option($this->master, SOL_SOCKET, SO_REUSEADDR, 1)  
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  11. or die("socket_option() failed");+ ?4 \$ m' K. [8 A* K4 g
  12. socket_bind($this->master, $address, $port)                    $ r1 l1 g1 f" {2 y( C* y6 p
  13. or die("socket_bind() failed");) D) q# d/ \5 m( N7 U6 X: d6 a
  14. socket_listen($this->master, 2)                              
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  15. or die("socket_listen() failed");! c8 @" |, ]) K* O- o' P
  16. $ V: e2 l4 F- D% F4 l# I: G$ U  t
  17. $this->sockets[] = $this->master;
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  18. ; |. R6 x; U8 A
  19. // debug
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  20. echo("Master socket  : ".$this->master."\n");
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  21. 3 G! P; v: {6 V& D9 P" F6 k
  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. $write = NULL;, L$ u6 H  h% ?7 e3 y) D
  25. $except = NULL;
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  26. socket_select($this->sockets, $write, $except, NULL);2 X9 x( j2 i5 Y( S! A

  27. ! `3 e; Y# Q7 S& ^; e) j
  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){7 |& m) r! L# F) p! E
  31. $client = socket_accept($this->master);  e/ s, ~: G7 ]$ _  F( U
  32. if ($client < 0) {
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  33. // debug1 N, B5 Y7 b# k' p. }' o
  34. echo "socket_accept() failed";. \- j0 V$ o* Y0 N7 Y2 |
  35. continue;9 [$ a3 b8 V; r" q; v4 x! N) ~
  36. } else {
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  37. //connect($client);7 z  R$ a, v7 w( e
  38. array_push($this->sockets, $client);
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  39. echo "connect client\n";1 @3 e9 K3 A4 \9 Y
  40. }
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  41. } else {, g( G4 |, O# s2 u! K% C
  42. $bytes = @socket_recv($socket,$buffer,2048,0);2 [; Z8 p0 X# X& Z" U7 @
  43. print_r($buffer);2 ?! _3 l" K$ Y& B
  44. if($bytes == 0) return;8 }9 d7 P1 Y9 s
  45. if (!$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);. U4 q) k1 _" A- f4 O0 T' u7 a
  48. echo "shakeHands\n";
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  49. } else {
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  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, $buffer);
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  54. echo "send file\n";
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  55. }/ y6 s* W, A/ ]+ v
  56. }
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  57. }: _: ~  W5 E/ c, G4 R( y' i2 |0 t
  58. }* Q& D' S" P3 [9 O  K1 l: J. J
  59. }
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  60. 3 F: K, ~7 |# o
  61. function dohandshake($socket, $req)
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  62. {. I0 [4 M1 T2 V* X/ V
  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" .* _3 Z/ n* O- n
  67. "Connection: Upgrade\r\n" .
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  68. "Sec-WebSocket-Accept: " . $acceptKey . "\r\n" .
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  69. "\r\n";) P, O% e# u) a% p# c
  70. ! j; ^; _  c4 [: `8 m0 \7 T6 I
  71. echo "dohandshake ".$upgrade.chr(0);           # [% Q. w- Q6 r" j7 q/ }7 C
  72. // 写入socket1 U8 B. ]6 j7 V; I+ L. d
  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3 z  A. u& g' W9 E' c. f# t: w0 I
  75. $this->handshake = true;
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  76. }
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  77. . d* L* k7 X. ?0 @
  78.   T. q: R% d5 ~% C
  79. function encry($req)
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  80. {. s2 s1 l7 s) l% y0 y
  81. $key = $this->getKey($req);5 |' t& i0 ^) o4 |  @! [
  82. $mask = "258EAFA5-E914-47DA-95CA-C5AB0DC85B11";! Y' W1 j5 o% z, h1 i6 U
  83. " ^3 g8 g4 ]' m# t; Y' D0 A
  84. return base64_encode(sha1($key . '258EAFA5-E914-47DA-95CA-C5AB0DC85B11', true));
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  85. }1 @# A* y  W+ U7 X

  86. 6 J" u: ~! b% X; {8 w' A* y
  87. function getKey($req)   Z; Y  l5 M' D7 z$ Z5 i) c
  88. {0 ^1 O5 s$ `: A; b/ T: m  O* M5 w) K
  89. $key = null;0 L# D/ k  z; ^+ H# B. U+ M
  90. if (preg_match("/Sec-WebSocket-Key: (.*)\r\n/", $req, $match)) {
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  91. $key = $match[1];
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  92. }
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  93. return $key;
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  94. }  S; s; }9 y6 i7 @
  95. 2 @- W* @& R$ S# p; }
  96. // 解析数据帧1 [& a7 j7 v; P/ b; H/ B
  97. function decode($buffer)  
    6 |$ `. w* f. i, W; {
  98. {* h) V* V2 j) m/ K( r7 x- B
  99. $len = $masks = $data = $decoded = null;+ S5 l- A0 @6 e; L/ q4 x
  100. $len = ord($buffer[1]) & 127;; V4 b2 `2 i& `% x
  101. 8 j- j' j9 {3 w+ d
  102. if ($len === 126)  {* M3 F4 l) ~/ [
  103. $masks = substr($buffer, 4, 4);
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  104. $data = substr($buffer, 8);' ?  v3 `! s, N/ Q, u  d2 A
  105. } else if ($len === 127)  {
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  106. $masks = substr($buffer, 10, 4);& |8 g, o1 z% D1 Q
  107. $data = substr($buffer, 14);
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  108. } else  {2 V. o; x5 e: x4 v
  109. $masks = substr($buffer, 2, 4);* H: w, ?3 _5 i# _! r/ L* Y
  110. $data = substr($buffer, 6);, M8 ^. c: w! S% g3 g1 [
  111. }
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  112. for ($index = 0; $index < strlen($data); $index++) {- n( I$ P6 Q3 ]! r; x
  113. $decoded .= $data[$index] ^ $masks[$index % 4];
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  114. }: f; _; k( P0 Z3 `% {
  115. return $decoded;( R4 p: R# B1 u3 o4 \
  116. }
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  117. $ O7 O5 @1 \% W
  118. // 返回帧信息处理  T+ z3 v! a; L$ f
  119. function frame($s)
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  120. {3 q9 D, m* h/ e! p( d" f
  121. $a = str_split($s, 125);* F$ o6 J5 Z- j
  122. if (count($a) == 1) {; A0 [: D% X- G8 X
  123. return "\x81" . chr(strlen($a[0])) . $a[0];
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  124. }
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  125. $ns = "";
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  126. foreach ($a as $o) {4 F2 F% g2 Q' R4 w! o% p% g
  127. $ns .= "\x81" . chr(strlen($o)) . $o;
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  128. }* l  d% }4 q- I5 G6 j- p' g
  129. return $ns;: K6 J% J1 ~' {) z; _
  130. }0 @  Q( G& ^1 ^1 Y" S& |9 |
  131. 6 \4 P/ @" p9 O' i; E
  132. // 返回数据7 v5 z, O$ F. e) C: {. P
  133. function send($client, $msg)
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  134. {
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  135. $msg = $this->frame($msg);2 v& c) @7 ?. P. i/ ?$ j4 r* k- u
  136. socket_write($client, $msg, strlen($msg));0 L  p0 Z& v2 p- S8 u5 u
  137. }/ F, _) G+ D: ~1 p; v
  138. }" z8 ^  m  J5 z0 R& U/ s
  139. : z/ n6 m9 Y; V5 u8 @- B
  140.    测试    $ws = new WS("127.0.0.1",2000);3 ~0 Y0 y9 q- N2 r
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