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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>' D3 }6 Q% g! M3 y! L
  2. <head>
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  3. <meta charset="UTF-8">/ a3 s% J/ g4 [1 w; O0 k! v
  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">
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  7. var ws;
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  8. function ToggleConnectionClicked() {         
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  9. try {; z7 G# y/ N& Y+ A; ?' a2 `& T
  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);};3 l; i: V$ J$ I: u
  12. ws.onmessage = function(event){alert("接收到服务器发送的数据：\r\n"+event.data);};2 e* @' h7 X9 O# r
  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);};0 A( e  u4 w+ b! Y& F
  14. ws.onerror = function(event){alert("WebSocket异常！");};
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  15. } catch (ex) {  T0 ~1 R4 j. X$ V- `
  16. alert(ex.message);      ( b9 e' {) f: L/ E
  17. }7 ~- O& f1 x5 O) Z0 B- H
  18. };
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  19. , p  l6 A2 a! W' `, l5 i+ T: l
  20. function SendData() {
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  21. try{, t9 x: D% ]7 o+ q1 y' E
  22. var content = document.getElementById("content").value;, |: [7 i& u$ f0 n% o  p0 x7 t- u, u
  23. if(content){
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  24. ws.send(content);8 O. u& r' F: E- W# U% q4 I* s. T
  25. }1 ]% C+ A* G! g- O

  26. ; q' o" S! {8 r
  27. }catch(ex){
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  28. alert(ex.message);
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  29. }
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  30. };" ^$ m+ `  V1 M- G

  31. ( r$ L4 l  |1 w7 W
  32. function seestate(){, \. L$ t) V+ |7 t
  33. alert(ws.readyState);
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  34. }) p3 W; N: C0 f3 z
  35. . x0 _* P/ p! X$ k8 @
  36. </script>
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  37. </head>: t& W. M- Q" z( I
  38. <body>
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  39. <button id='ToggleConnection' type="button" onclick='ToggleConnectionClicked();'>连接服务器</button><br /><br />& t7 J6 W. d0 |8 V2 }# P
  40. <textarea id="content" ></textarea>- [% U) G: S" ~
  41. <button id='ToggleConnection' type="button" onclick='SendData();'>发送我的名字：beston</button><br /><br />6 ^( |8 f* g/ y1 S9 M4 D* A
  42. <button id='ToggleConnection' type="button" onclick='seestate();'>查看状态</button><br /><br />. I# d- k: ?7 [9 F
  43. 0 t7 w. w% z7 f6 M( X  p& h
  44. </body>* B* }, `) G  d+ U, @& M) R" ~5 @- o. g
  45. </html>5 F8 v8 y$ C# h) f6 |2 `
复制代码
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2）服务器端实现% N, S0 b1 O% M

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  1. class WS {
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  2. var $master;  // 连接 server 的 client
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  3. var $sockets = array(); // 不同状态的 socket 管理
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  4. var $handshake = false; // 判断是否握手
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  5. * l. f$ u7 W! T" X$ }
  6. function __construct($address, $port){
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  7. // 建立一个 socket 套接字0 R5 k; }2 D3 X
  8. $this->master = socket_create(AF_INET, SOCK_STREAM, SOL_TCP)   9 O: Y0 j, `5 Z0 Q7 ~. ~6 S
  9. or die("socket_create() failed");6 G4 D2 U; q, Y  u+ W9 f! ]) y
  10. socket_set_option($this->master, SOL_SOCKET, SO_REUSEADDR, 1)  8 J8 c$ L* K" x3 i: f& _5 A: S
  11. or die("socket_option() failed");
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  12. socket_bind($this->master, $address, $port)                      y5 u3 h7 r2 Y6 n( b+ |" A
  13. or die("socket_bind() failed");
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  14. socket_listen($this->master, 2)                              
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  15. or die("socket_listen() failed");8 W, D7 L0 ~6 c. s1 `# i& b
  16. ) F, A6 j/ d; S( j  T' [2 z
  17. $this->sockets[] = $this->master;6 h! q& m) Y0 Y3 j' T% c( Y0 m
  18. 8 X: C1 U) H3 [
  19. // debug
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  20. echo("Master socket  : ".$this->master."\n");3 J9 G8 ~9 k5 k5 G! T1 T" n

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  22. while(true) {
    # ?$ u/ u" L0 s
  23. //自动选择来消息的 socket 如果是握手 自动选择主机5 |4 x8 c. Z) ?5 v
  24. $write = NULL;
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  25. $except = NULL;
    . ]# {( s3 K  N0 z( ~
  26. socket_select($this->sockets, $write, $except, NULL);' c2 E, y) r6 A' D+ ^, y

  27. ! x% G7 o9 u5 ?" @6 Y0 k, }! e( J0 l
  28. foreach ($this->sockets as $socket) {. L4 p6 e8 Z: X6 a  G4 ?& F
  29. //连接主机的 client + {$ o; K7 s% n# S- V0 x+ m+ t4 k
  30. if ($socket == $this->master){$ C4 b( B- r  \" y
  31. $client = socket_accept($this->master);2 Q' ~9 I, n( J# Z
  32. if ($client < 0) {
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  33. // debug
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  34. echo "socket_accept() failed";; e$ Y7 J& G* [" \
  35. continue;1 z( G9 t' V2 i$ M& ?- G
  36. } else {
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  37. //connect($client);# N/ q4 Q% M* w. X+ z
  38. array_push($this->sockets, $client);" v7 X+ R1 Z5 H% t% C- l
  39. echo "connect client\n";
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  40. }
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  41. } else {. h: K3 G7 j  L& r6 A
  42. $bytes = @socket_recv($socket,$buffer,2048,0);
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  43. print_r($buffer);: D" ~3 _7 u* b4 y! i+ w/ l% b
  44. if($bytes == 0) return;' G% ~0 N# ?: }) |5 I
  45. if (!$this->handshake) {- n2 R, S+ ~; a; o- E3 R
  46. // 如果没有握手，先握手回应5 N" d6 q  K7 }% u! h
  47. $this->doHandShake($socket, $buffer);7 N9 Y! T. s" b2 T
  48. echo "shakeHands\n";8 M4 }6 y! Q+ x. P4 E( h
  49. } else {2 Y$ ]5 w- h* ?) m6 v

  50. 3 _1 I( h7 S- h; l4 O0 q& y5 P
  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);7 t' n3 K2 v0 k/ ?- a7 T- ^" W
  53. //process($socket, $buffer);
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  54. echo "send file\n";$ u! O) q6 y; U8 j$ A5 s9 ?
  55. }' J' g" j# P$ m( t$ T
  56. }/ n% }8 E. b! n  B4 K! f
  57. }7 s9 g3 x) ?0 g5 P# r9 a
  58. }
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  59. }
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  60. $ B! {% o( u" g4 X# d( _5 t
  61. function dohandshake($socket, $req)2 C. Y6 L" Y& e1 t$ k& k
  62. {# b5 i( V: Z0 A
  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" .1 g7 i( @! }: ^# p/ _
  66. "Upgrade: websocket\r\n" .7 R8 t9 {5 u# |2 q% D
  67. "Connection: Upgrade\r\n" .
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  68. "Sec-WebSocket-Accept: " . $acceptKey . "\r\n" .- h" k8 y7 _: y2 K" N* u
  69. "\r\n";9 f3 F! W+ z4 e' B. {
  70. 2 G; t" c* Y4 m8 U3 P
  71. echo "dohandshake ".$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)));, t7 s3 N1 g* K: i9 j( L# n
  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. }+ ]1 n: y( Q! b6 |

  77. 1 {: O, _* j" m9 U( W

  78. : C" \! E$ |( r% ~$ p" w- c
  79. function encry($req)1 b5 j  A6 [. M4 W8 }: Q
  80. {
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  81. $key = $this->getKey($req);4 u6 S0 q( X/ Z  O( ~5 D. u
  82. $mask = "258EAFA5-E914-47DA-95CA-C5AB0DC85B11";
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  83. ! v; ], t: H, n! I; b4 t$ O
  84. return base64_encode(sha1($key . '258EAFA5-E914-47DA-95CA-C5AB0DC85B11', true));
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  85. }
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  86. 9 }. N8 ?2 _! t: D% j* Z9 m" P
  87. function getKey($req) - c1 L4 o+ I* y" h, L
  88. {
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  89. $key = null;
    # ]! X( S8 U, L8 m: h
  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 $key;
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  94. }
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  95. * k, T$ Z' R4 U4 t- [/ g  v8 M
  96. // 解析数据帧& }. V7 k, I/ ?( N$ i& x" D( \, n; [
  97. function decode($buffer)  
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  98. {" T" `/ B9 |2 u( D4 i, K2 ]
  99. $len = $masks = $data = $decoded = null;
    0 m* \, p. ]5 j% }: }
  100. $len = ord($buffer[1]) & 127;* s9 V8 [* ?5 V. k- W, }2 K
  101. 1 ]& Q! [* T5 c6 S
  102. if ($len === 126)  {: T3 Q6 f/ p! R8 o
  103. $masks = substr($buffer, 4, 4);/ j5 g4 T; ^, J) D, q# O& r
  104. $data = substr($buffer, 8);
    % }5 M6 k% @$ [2 P! {
  105. } else if ($len === 127)  {
    4 f% u+ r6 J. e' [
  106. $masks = substr($buffer, 10, 4);
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  107. $data = substr($buffer, 14);
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  108. } else  {
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  109. $masks = substr($buffer, 2, 4);
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  110. $data = substr($buffer, 6);5 _2 W0 U5 y4 k5 M
  111. }
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  112. for ($index = 0; $index < strlen($data); $index++) {+ ?# o, ~: A% [
  113. $decoded .= $data[$index] ^ $masks[$index % 4];& I3 z) I1 n2 Y" K: J/ N+ i# `
  114. }
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  115. return $decoded;
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  116. }
    3 [6 n+ r/ p1 r

  117. 5 E5 V! M( H/ F8 c! o" }$ t) P- c* O
  118. // 返回帧信息处理
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  119. function frame($s) 6 S) @: q* y  T7 {$ }3 {- P6 I- J
  120. {
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  121. $a = str_split($s, 125);
    ! v5 r& @: |- {) N
  122. if (count($a) == 1) {
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  123. return "\x81" . chr(strlen($a[0])) . $a[0];/ c5 g2 @# b; U
  124. }, J0 y6 Y# J, C# h8 p
  125. $ns = "";
    6 B  J- e; [* z$ w+ {
  126. foreach ($a as $o) {, N" p* F( e( ~
  127. $ns .= "\x81" . chr(strlen($o)) . $o;
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  128. }
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  129. return $ns;8 c" b9 \8 G" s, G
  130. }" s6 D% B. N2 k" b, q  Z+ `
  131. 3 y" _- K6 }7 R6 ~% I0 g
  132. // 返回数据. T2 R* k9 z. T
  133. function send($client, $msg)+ r$ s2 {. R1 V2 a$ r( r& ?
  134. {
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  135. $msg = $this->frame($msg);9 f! w8 L$ T* o$ ^
  136. socket_write($client, $msg, strlen($msg));
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  137. }* d; A! _2 ~7 X6 R$ ?
  138. }
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  139. 6 w0 V: R% S9 T/ f6 S6 h/ f
  140.    测试    $ws = new WS("127.0.0.1",2000);
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  141. & r' j& b0 y  H1 j$ |1 T$ D3 i
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