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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>2 q$ E. g1 _" B) r) P$ d
  2. <head>8 A$ T% [. q) C& h! a
  3. <meta charset="UTF-8">
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  4. <title>Web sockets test</title># p: t. p9 N$ W) E
  5. <script src="jquery-min.js" type="text/javascript"></script>* P4 V4 i. T. z4 E' y9 ~
  6. <script type="text/javascript">2 [, Q" `% v4 e, _3 b2 R
  7. var ws;; G4 k8 I# I* b/ p* b' y/ q
  8. function ToggleConnectionClicked() {          7 a" b- b( k+ l2 v& M; _, N
  9. try {
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  10. ws = new WebSocket("ws://127.0.0.1:2000");//连接服务器        0 j7 |) q6 d1 O) f
  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);};) v) D9 G! Q# }, j
  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！");};/ s/ E) F) T- X1 G$ }
  15. } catch (ex) {1 R  ?: j$ t/ R$ N
  16. alert(ex.message);      
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  17. }# n+ n" @( `* m4 U+ E
  18. };
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  19. 9 e2 y: _! H4 h* [* A6 d; }
  20. function SendData() {: J3 c. H" a  B( P
  21. try{) s$ x/ n, [! V
  22. var content = document.getElementById("content").value;( Q8 t6 V/ v1 k, ]; e8 |
  23. if(content){
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  24. ws.send(content);1 w2 v+ S2 B- t( w: z% o! m
  25. }
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  26. . K* K3 O; c  q; d/ k
  27. }catch(ex){
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  28. alert(ex.message);9 b, y, @) ~1 a7 k( d0 V
  29. }+ G" U" z& O/ _5 D
  30. };7 m, h: j% l7 a% N$ T" ?

  31. 7 ~. s0 Y! A$ e" L) d
  32. function seestate(){
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  33. alert(ws.readyState);
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  35. . O0 k7 b$ x; u7 ]8 Y9 S
  36. </script>4 J' W' T5 _, f
  37. </head>" W: g& \% ^2 O. U- I
  38. <body>2 ?0 p* Q- r5 ^$ T6 V" s$ c  s8 A
  39. <button id='ToggleConnection' type="button" onclick='ToggleConnectionClicked();'>连接服务器</button><br /><br />) d8 X+ F( U2 D2 \' [/ w1 M
  40. <textarea id="content" ></textarea>- z# v5 a- p2 _" O  o0 r6 k
  41. <button id='ToggleConnection' type="button" onclick='SendData();'>发送我的名字：beston</button><br /><br />3 p/ H( h% k( j
  42. <button id='ToggleConnection' type="button" onclick='seestate();'>查看状态</button><br /><br />
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  43. ( I& ~% h1 U( A; L
  44. </body>
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  45. </html>6 X5 q! _. T5 K; i7 \6 V5 M
复制代码

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- s, i) n; k  d* [% Y! u2）服务器端实现8 J9 y' i. v" ], m+ ^6 Q
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  1. class WS {5 ^. z. a& I" |& K' |4 f' h
  2. var $master;  // 连接 server 的 client
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  3. var $sockets = array(); // 不同状态的 socket 管理, R+ [0 t3 P4 u+ b& X( v7 a
  4. var $handshake = false; // 判断是否握手% b* u1 a2 W  j: L( q' t9 d

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  6. function __construct($address, $port){
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  7. // 建立一个 socket 套接字! V& E& O+ P6 y) 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)  2 W& K5 |3 A6 ^+ F  J/ O
  11. or die("socket_option() failed");
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  12. socket_bind($this->master, $address, $port)                    2 H/ ]" J0 ^% I0 [
  13. or die("socket_bind() failed");% A0 B3 n2 ~' H: z
  14. socket_listen($this->master, 2)                               . \6 S  V+ O* Q, q+ |
  15. or die("socket_listen() failed");2 M) E" W0 L1 R! S+ L

  16. - w+ S5 E% e! T7 {( b' w& G
  17. $this->sockets[] = $this->master;. t  q1 w/ T# {! A. ?# k* J
  18. ' z5 s3 X/ D, ?. o1 y4 l
  19. // debug
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  20. echo("Master socket  : ".$this->master."\n");
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  21.   D% ~+ e$ L, Y# b# s# a
  22. while(true) {- s" a  d: m- i4 N4 }% y
  23. //自动选择来消息的 socket 如果是握手 自动选择主机# B& {6 V: I& s' U( D; U6 J
  24. $write = NULL;
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  25. $except = NULL;% X5 e2 O* j! V1 I
  26. socket_select($this->sockets, $write, $except, NULL);8 t3 b$ _4 u. y" X7 o/ H

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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 == $this->master){, H! v2 ?/ j  j2 B$ X
  31. $client = socket_accept($this->master);  {! Z" J# Y4 ^; A, E
  32. if ($client < 0) {7 h* @5 B! K* i  e7 p
  33. // debug. n) v" p# E3 X# _; Z- N6 e4 F  s
  34. echo "socket_accept() failed";
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  35. continue;1 n* K, `! ?! h8 v( ?
  36. } else {
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  37. //connect($client);% y, c, K, U7 d& T" p6 f0 v( Q
  38. array_push($this->sockets, $client);6 W+ M9 y" Y9 U' R
  39. echo "connect client\n";1 A7 Z$ H( \; R6 z; X
  40. }
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  41. } else {* v$ W0 r4 m6 c( C' ?' }1 c
  42. $bytes = @socket_recv($socket,$buffer,2048,0);
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  43. print_r($buffer);$ ]# P' U! K( s! o( ]2 N; I
  44. if($bytes == 0) return;# a, C$ M/ x% \( I0 F
  45. if (!$this->handshake) {7 w' V% Q5 R1 J  h3 ~9 X
  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";4 X# ^& S5 s& B
  49. } else {( @! q) I6 U! v0 |
  50. # U0 |3 E# a! z
  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, $buffer);
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  54. echo "send file\n";
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  55. }
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  56. }0 O9 v/ \8 W* w" {3 Z, D. z
  57. }9 V( \' I+ V: I# i: q  q" e0 d
  58. }( W9 W7 u8 o/ n& ^$ g- _' ]/ m7 b: ~
  59. }" H( o! S8 [* m7 d2 D) q  q

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  61. function dohandshake($socket, $req)/ X' T3 t% i% l9 H, r. i  K2 U
  62. {
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  63. // 获取加密key+ C' G" _$ b" u0 {
  64. $acceptKey = $this->encry($req);
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  65. $upgrade = "HTTP/1.1 101 Switching Protocols\r\n" .9 N7 _- k9 H# W5 K3 ], y
  66. "Upgrade: websocket\r\n" .
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  67. "Connection: Upgrade\r\n" .
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  68. "Sec-WebSocket-Accept: " . $acceptKey . "\r\n" .
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  69. "\r\n";
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  70.   G1 Z3 h$ L' f
  71. echo "dohandshake ".$upgrade.chr(0);           - J  }% j( l& ~
  72. // 写入socket+ e( R% O% e- L/ i, \6 |* l. `
  73. socket_write($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
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  75. $this->handshake = true;
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  76. }# S; Q0 W' }/ q# J5 w
  77. + }5 @" ~2 E( L

  78. 6 H" B- ]; m6 J" w* F
  79. function encry($req)
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  80. {9 Y  ]! C, y: P- f
  81. $key = $this->getKey($req);
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  82. $mask = "258EAFA5-E914-47DA-95CA-C5AB0DC85B11";
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  84. return base64_encode(sha1($key . '258EAFA5-E914-47DA-95CA-C5AB0DC85B11', true));
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  85. }
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  86. % B" H% O; w5 ]: @
  87. function getKey($req)
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  88. {
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  89. $key = null;% h, h1 Q; ?3 e/ j$ q
  90. if (preg_match("/Sec-WebSocket-Key: (.*)\r\n/", $req, $match)) {
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  91. $key = $match[1]; . P" o5 u$ q( O, P, c6 f8 W
  92. }% O8 p* ]1 j. |% u6 N
  93. return $key;
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  94. }) ~0 n2 s' Y. k% F) B/ p

  95. - c8 C- Q: \5 u) Q  P- q
  96. // 解析数据帧  i; M( v9 Y- _$ K2 {
  97. function decode($buffer)  
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  98. {  K) _; _* d! n# K2 O6 i" w6 t
  99. $len = $masks = $data = $decoded = null;
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  100. $len = ord($buffer[1]) & 127;& i) Z; u$ |3 ?
  101. - @& J0 a% I$ r& Z2 D
  102. if ($len === 126)  {( P) r* G& I8 X% A1 R$ K8 K
  103. $masks = substr($buffer, 4, 4);
      R: O+ }/ A0 v' ?
  104. $data = substr($buffer, 8);% Q  d- }+ T% G2 E9 h  p# N
  105. } else if ($len === 127)  {. V2 f3 d  @9 D* ^
  106. $masks = substr($buffer, 10, 4);6 ?: T  M. \, }) ]0 u; q, N
  107. $data = substr($buffer, 14);# [) ?& U' {/ x. `' P, K' Q
  108. } else  {
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  109. $masks = substr($buffer, 2, 4);5 H, s) y5 o! }5 p; i2 M% I5 G  H9 t+ H
  110. $data = substr($buffer, 6);  g4 Y5 c/ c9 W" x8 A: c5 j/ d
  111. }3 k7 q- j- y% l* r+ m6 f# \
  112. for ($index = 0; $index < strlen($data); $index++) {
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  113. $decoded .= $data[$index] ^ $masks[$index % 4];
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  114. }. X5 H- Y/ H: S* j4 v
  115. return $decoded;! Y& E2 i4 R! _+ g+ L
  116. }
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  117. 2 j! b; N1 G# d. v. _
  118. // 返回帧信息处理
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  119. function frame($s) 8 V- G/ O- c, Z! X
  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])) . $a[0];' j! M6 E9 B7 C8 v+ m
  124. }/ W6 A$ B3 y" R8 o
  125. $ns = "";6 J: A# j' }6 V3 ?7 K: }
  126. foreach ($a as $o) {
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  127. $ns .= "\x81" . chr(strlen($o)) . $o;
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  128. }. _1 K3 ~/ Y4 B# B# N, c% x! ]2 \( W
  129. return $ns;' P/ n% D. G7 l4 f( ~) q$ O
  130. }
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  131. ) G/ o; G. s+ |$ ?+ a
  132. // 返回数据
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  133. function send($client, $msg)
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  134. {
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  135. $msg = $this->frame($msg);4 L1 R( V/ ]4 x6 l. S
  136. socket_write($client, $msg, strlen($msg));# K& g# A, B; T$ _
  137. }8 r  ]- G, R) m+ l' @4 o" m6 U
  138. }- L/ n9 @/ z2 O# g2 F0 Z
  139. 7 k- t! G+ r1 w  D
  140.    测试    $ws = new WS("127.0.0.1",2000);
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