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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9 D; D$ P. W( r4 o, f
  1. <html>$ O: D2 q" a1 R
  2. <head>: Y1 k( e( x. W# n! W$ X# |
  3. <meta charset="UTF-8">
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  4. <title>Web sockets test</title>
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  5. <script src="jquery-min.js" type="text/javascript"></script>* z9 K9 I' H$ w1 U' v8 L
  6. <script type="text/javascript">+ d- I8 K# I" o. ~% _( M* m
  7. var ws;
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  8. function ToggleConnectionClicked() {         
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  9. try {  b/ O' u! h6 ]) m' s+ F' N/ F- d
  10. ws = new WebSocket("ws://127.0.0.1:2000");//连接服务器        + M4 Z; P: L. L- H
  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);};- D5 f6 V+ H7 y0 ^. Y* k
  12. ws.onmessage = function(event){alert("接收到服务器发送的数据：\r\n"+event.data);};- J/ H0 U/ V: u: J$ }, K' L
  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！");};
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  15. } catch (ex) {  ?9 L2 m& A# }- V- S* f3 s: H
  16. alert(ex.message);      
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  17. }9 A# _" e/ q1 x; Y; Z
  18. };% y) r5 K! [( e/ ^
  19. 9 e2 K: ]  p' Z8 h
  20. function SendData() {  X4 K2 ]" |' N2 ?- D
  21. try{+ T. h4 r# `& e
  22. var content = document.getElementById("content").value;
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  23. if(content){+ r2 y, b% _, ?5 {2 C
  24. ws.send(content);3 C; f: w3 l( L# E
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  26. 9 g' U  `& U) G4 L9 e8 g
  27. }catch(ex){
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  28. alert(ex.message);1 y: \. U. W% u( M
  29. }3 Z* z: p0 f1 k- E; D
  30. };$ q: @4 U, h+ X6 P+ H  Y) }
  31. 2 n) s' ~; b' K8 L3 @# l
  32. function seestate(){
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  33. alert(ws.readyState);
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  34. }0 ^' h; L* T# w+ q# o) x* z
  35. 0 f9 a7 X7 U9 `7 h7 S
  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 />6 c! }* E: d; d4 r, }3 Q0 a
  42. <button id='ToggleConnection' type="button" onclick='seestate();'>查看状态</button><br /><br />& P9 j9 K; d6 ^6 }

  43. & L& j* M' P. H; ?8 ]9 F
  44. </body>+ @. v2 u/ g& {) T: s
  45. </html>" Y8 C" S1 |# l8 J7 ]
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6 U  u; Q- h( ~3 y- L2）服务器端实现, P# \1 g, ^8 Z  @& O/ u
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  1. class WS {' s) S5 X$ _/ q
  2. var $master;  // 连接 server 的 client$ w# n$ x9 j9 J1 ~: l; @1 S. s
  3. var $sockets = array(); // 不同状态的 socket 管理+ }. _$ ~% f& z1 F, E, }0 w
  4. var $handshake = false; // 判断是否握手; B2 v: T  u9 W# a0 T4 v; @: V; d" D1 D/ w
  5. 2 @. Q( ?0 s0 \$ R* X; ~" t, n
  6. function __construct($address, $port){' u/ M$ M6 `0 y( ^
  7. // 建立一个 socket 套接字
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  8. $this->master = socket_create(AF_INET, SOCK_STREAM, SOL_TCP)   
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  9. or die("socket_create() failed");) k4 {! D: l* s" a7 B0 u$ o2 z
  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, $port)                    
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  13. or die("socket_bind() failed");. a3 p; D7 m8 q; i: n
  14. socket_listen($this->master, 2)                              
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  15. or die("socket_listen() failed");
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  16. . h; J* d: F- V5 [
  17. $this->sockets[] = $this->master;$ P5 U* [5 k! X- y: \
  18. 4 \4 u9 k* ^3 k6 X1 C; R
  19. // debug& X1 v3 t! Z% t9 }) |0 O6 i
  20. echo("Master socket  : ".$this->master."\n");/ u* F* d' j4 R1 ^. `

  21. % ?" I( I7 ^7 ~8 ^9 w0 P5 S( h8 }
  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5 x. Y; R" b& f5 G0 n
  24. $write = NULL;0 @, v! G$ ~. n$ f1 {* T5 |
  25. $except = NULL;: {$ Z4 j: i& s0 B6 h# O8 `* F6 v
  26. socket_select($this->sockets, $write, $except, NULL);
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  27. 2 |, v- C1 Q8 l+ J
  28. foreach ($this->sockets as $socket) {
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  29. //连接主机的 client
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  30. if ($socket == $this->master){
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  31. $client = socket_accept($this->master);2 C8 J3 h, t& A  D/ l( z
  32. if ($client < 0) {
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  33. // debug( W. k! X, o- `- A0 r
  34. echo "socket_accept() failed";( C  ]$ d: U; k) E
  35. continue;5 v# p; A9 Y$ ]8 _) [
  36. } else {
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  37. //connect($client);# K- z1 ^; o( X
  38. array_push($this->sockets, $client);
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  39. echo "connect client\n";
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  40. }
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  41. } else {1 H8 o+ Z/ R! |
  42. $bytes = @socket_recv($socket,$buffer,2048,0);6 A; u! s: j3 r% a9 L4 ]8 \5 D
  43. print_r($buffer);
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  44. if($bytes == 0) return;; n5 l$ V- p2 N) T2 z3 K5 B) h/ A) ], W8 n
  45. if (!$this->handshake) {& B. @2 ?* l/ C8 V
  46. // 如果没有握手，先握手回应6 [7 R% \7 N+ M5 u: {4 h$ U3 c
  47. $this->doHandShake($socket, $buffer);
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  48. echo "shakeHands\n";
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  49. } else {1 ]" Y' e& ?; a

  50. * X7 K( x  t  b# K' E
  51. // 如果已经握手，直接接受数据，并处理2 j- Z. \* W. [
  52. $buffer = $this->decode($buffer);
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  53. //process($socket, $buffer);
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  54. echo "send file\n";5 W5 b4 b$ v- Q7 U8 `( F
  55. }
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  56. }
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  57. }
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  58. }
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  59. }+ c0 A  M3 H% T2 `1 x* J3 n; J

  60. ( w, t( e2 `2 M' N  P% T' W' b$ T
  61. function dohandshake($socket, $req)  I, N" q0 m0 r. G
  62. {
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  63. // 获取加密key# v5 ?3 W2 L9 s9 J4 ^, V
  64. $acceptKey = $this->encry($req);$ |" Z* S* W' O/ @# l' R, J+ d
  65. $upgrade = "HTTP/1.1 101 Switching Protocols\r\n" .
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  66. "Upgrade: websocket\r\n" .
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  67. "Connection: Upgrade\r\n" .3 ?$ ]" p3 q, r4 ?. K( i( u
  68. "Sec-WebSocket-Accept: " . $acceptKey . "\r\n" .
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  69. "\r\n";/ q. }1 Z( D' [# p
  70. % D+ Q' [% \  k/ ?: }, d; G
  71. echo "dohandshake ".$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)));# u/ I6 X8 b" M& l+ D
  74. // 标记握手已经成功，下次接受数据采用数据帧格式% _  {! G  X' p' y% m! t0 E
  75. $this->handshake = true;
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  76. }, D- U* m% `3 f0 P" p  S
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  78. 6 }% u6 U, \3 [8 A+ ^) W
  79. function encry($req)
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  80. {
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  81. $key = $this->getKey($req);
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  82. $mask = "258EAFA5-E914-47DA-95CA-C5AB0DC85B11";- V; H1 Z8 J" a. {, y
  83. , h7 F6 @9 C7 l4 X* ]. p4 _# r
  84. return base64_encode(sha1($key . '258EAFA5-E914-47DA-95CA-C5AB0DC85B11', true));, l# }  D# x1 D$ G1 ?
  85. }
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  86. 8 G/ S9 \/ v3 {+ A0 H0 w
  87. function getKey($req) / t! o/ X, o9 a8 d
  88. {
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  89. $key = null;6 {! S, R' `6 v( O2 l. U+ M7 h
  90. if (preg_match("/Sec-WebSocket-Key: (.*)\r\n/", $req, $match)) {
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  91. $key = $match[1]; : p: x  ~5 }" P) q+ I
  92. }+ `5 j3 [  ~7 N- _2 C. ?
  93. return $key;! x  c" E4 r" K3 B8 Y8 ~
  94. }; w* w5 D) C. `% Y. C: q1 R+ q' P

  95. 4 v: y/ `4 l" i: A
  96. // 解析数据帧& ^; j5 |8 P- B
  97. function decode($buffer)  
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  98. {% S7 a" g$ I$ n. M! J
  99. $len = $masks = $data = $decoded = null;
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  100. $len = ord($buffer[1]) & 127;8 ]5 J6 i& m3 B9 Y

  101. & }, l  _/ A5 H( o3 d' @* Q6 r% Y
  102. if ($len === 126)  {+ j5 Y, }3 \6 R
  103. $masks = substr($buffer, 4, 4);$ s& S; W! B/ W7 ]
  104. $data = substr($buffer, 8);# M! g9 F- ~$ b, I5 m+ B" x
  105. } else if ($len === 127)  {
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  106. $masks = substr($buffer, 10, 4);# J* Y( H# A' k: ]
  107. $data = substr($buffer, 14);
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  108. } else  {
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  109. $masks = substr($buffer, 2, 4);8 h) O. Z( {, P# j! L7 J! C
  110. $data = substr($buffer, 6);9 z; j- G  Y5 d5 [* F
  111. }5 [! I# \- N& p) _( W: X! `
  112. for ($index = 0; $index < strlen($data); $index++) {
    8 h, k: J$ g$ `3 h, _" ?
  113. $decoded .= $data[$index] ^ $masks[$index % 4];4 L7 b! M2 |+ l  G/ d. x4 }/ N
  114. }
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  115. return $decoded;
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  116. }# K3 t9 R' B8 I2 a7 }6 q- ^) n; }
  117. " @* M3 E9 V6 _
  118. // 返回帧信息处理2 U- x3 w2 K) @5 m$ L
  119. function frame($s)
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  120. {5 `- q* W; z* n1 Q, @/ x4 W* n
  121. $a = str_split($s, 125);2 {' J/ v( Q3 w& B+ S$ p3 c
  122. if (count($a) == 1) {
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  123. return "\x81" . chr(strlen($a[0])) . $a[0];
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  124. }
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  125. $ns = "";5 _7 i& O9 R/ i# b7 l8 T
  126. foreach ($a as $o) {% A! M+ n5 R' r7 N6 p: X! i
  127. $ns .= "\x81" . chr(strlen($o)) . $o;' P2 D- p! B) }, J! I& K- H6 g
  128. }/ \: {1 z; f; M9 G' x- f% v6 x( N
  129. return $ns;& {2 L& ?7 {2 G2 [8 y) J) t
  130. }
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  131. ; v0 M; j: U+ x9 b
  132. // 返回数据0 d1 K" j* K6 L$ u( N3 F
  133. function send($client, $msg)
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  134. {: a+ b. G( i! i: N, K% Y
  135. $msg = $this->frame($msg);
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  136. socket_write($client, $msg, strlen($msg));# k/ `) l4 i6 t
  137. }
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  138. }
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  139. $ z9 X8 t  B  `% `9 e
  140.    测试    $ws = new WS("127.0.0.1",2000);
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  141. 5 s5 _" \9 G4 m# T6 U
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