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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>
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  2. <head>
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  3. <meta charset="UTF-8">
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  4. <title>Web sockets test</title>* R5 q6 s3 Q' H2 ?: Z
  5. <script src="jquery-min.js" type="text/javascript"></script>& j9 F6 Z3 l7 q( L$ z/ d6 h
  6. <script type="text/javascript">: v! i# S1 P) B. k% Q
  7. var ws;
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  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        # |# c1 n) I8 w) g& `6 q
  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);};- |( @+ s( K" e7 p
  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！");};+ O1 i1 b3 l) v# M3 V$ G
  15. } catch (ex) {$ d$ g! L2 d* i7 l
  16. alert(ex.message);      5 J, b; b3 p5 M3 _. p) B/ l
  17. }
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  18. };
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  19. # j! v- Y* S- V
  20. function SendData() {4 u0 d) Q. S+ `% I
  21. try{/ S' N: X& l6 o% V9 H
  22. var content = document.getElementById("content").value;: G* h6 H9 d. `8 r4 u
  23. if(content){
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  24. ws.send(content);
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  25. }
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  26. 9 f* i+ J. n$ r* w7 Q
  27. }catch(ex){" B. H, H1 M3 H" ?; U# W- E
  28. alert(ex.message);6 v2 `) j+ d1 G3 |
  29. }: \  X. _5 K  q4 c; k
  30. };# L/ {! u) X9 r! d# V' j5 `# a. U6 s
  31. # m2 C5 d1 O: T  @
  32. function seestate(){
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  33. alert(ws.readyState);
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  35. - b) E8 c5 ~' t+ Z. U; W
  36. </script>
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  37. </head>
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  38. <body>3 d. e0 L) t1 `- T5 M% \
  39. <button id='ToggleConnection' type="button" onclick='ToggleConnectionClicked();'>连接服务器</button><br /><br />8 L4 d2 Q7 [; p% m  j# X1 ~
  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 />
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  43. 1 b  v7 K! g7 |
  44. </body>; I' E  {# F1 Q" C- ~6 l
  45. </html>; n& v* q9 ^) c3 U8 y
复制代码
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2）服务器端实现9 i  l: y+ _' R. q, }
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  1. class WS {
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  2. var $master;  // 连接 server 的 client* U' n: m# Z+ \
  3. var $sockets = array(); // 不同状态的 socket 管理
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  4. var $handshake = false; // 判断是否握手
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  5. # h2 o) G* C+ L3 F
  6. function __construct($address, $port){
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  7. // 建立一个 socket 套接字
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  8. $this->master = socket_create(AF_INET, SOCK_STREAM, SOL_TCP)   ; x% O2 I" x5 N% e
  9. or die("socket_create() failed");
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  10. socket_set_option($this->master, SOL_SOCKET, SO_REUSEADDR, 1)  
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  11. or die("socket_option() failed");. l+ O  T' H$ b9 i
  12. socket_bind($this->master, $address, $port)                    3 m" O- Y2 S5 e3 B. P& z5 ]  z. v
  13. or die("socket_bind() failed");5 L, E( G" A- S
  14. socket_listen($this->master, 2)                               2 F/ S$ i. w* `) m
  15. or die("socket_listen() failed");  I8 c9 S) V- t  P: D

  16. & g1 K, K7 v. s; y4 A* i
  17. $this->sockets[] = $this->master;- U, J. q6 p, Y' x0 Y8 j9 R! g
  18. & O1 L/ `/ \! V+ w: H5 b  D, L
  19. // debug# o: j1 E4 w6 G* ]# Q! t7 O& \* V; [
  20. echo("Master socket  : ".$this->master."\n");1 U6 ~' Z) X& q1 ^2 K* i
  21. ) D8 z% Z3 P6 [. t; g1 b1 E+ K6 m/ y9 z: Y: V
  22. while(true) {. L6 m- I. [0 G8 |" j- a
  23. //自动选择来消息的 socket 如果是握手 自动选择主机8 M  `% s& k* w8 E
  24. $write = NULL;
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  25. $except = NULL;- L6 H+ k2 U# A( D+ ~
  26. socket_select($this->sockets, $write, $except, NULL);; i' x9 r  O" }5 B. B

  27. " h; \% f4 Z% q1 u4 ?  \  O5 ?& }
  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);$ s+ }9 i6 K. F1 d" Y
  32. if ($client < 0) {9 E! J4 Q8 t5 y$ S) J0 K% l4 t
  33. // debug
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  34. echo "socket_accept() failed";/ y% u! v$ u8 \' |* h: v
  35. continue;6 h8 D( v) y. i
  36. } else {" E  {4 t4 n' j; P7 V
  37. //connect($client);
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  38. array_push($this->sockets, $client);& h% p* o0 a0 @
  39. echo "connect client\n";( E8 ^* G; l" e3 E" U
  40. }
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  41. } else {  V$ `) I" k2 k& }3 W% E* y
  42. $bytes = @socket_recv($socket,$buffer,2048,0);$ @7 q$ k7 [, Z# M) G( S
  43. print_r($buffer);+ M- Q/ V, d( K0 ]1 q
  44. if($bytes == 0) return;6 O8 x- V. ~* s# c
  45. if (!$this->handshake) {5 _* X1 y  N# p, S
  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";
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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);" ~& e% V. y7 u" `/ N0 f6 T# C
  53. //process($socket, $buffer); 6 m( {- e' s7 }" C0 i- N1 m* k6 N% ], `
  54. echo "send file\n";4 `+ s. }9 v1 Y$ V" p% O+ y
  55. }/ T# s$ V( N" y& j9 y+ t2 r! T8 Y
  56. }8 {1 Z/ D# D1 z8 X5 o
  57. }. m7 w0 B) L. Z9 O- F
  58. }
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  59. }
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  60. ) T; _7 G$ g8 u
  61. function dohandshake($socket, $req)
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  62. {$ ?8 u9 I+ e( ]
  63. // 获取加密key! x# W; t  ?& S5 B: u, _5 c7 g- |
  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" .
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  67. "Connection: Upgrade\r\n" .
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  68. "Sec-WebSocket-Accept: " . $acceptKey . "\r\n" .
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  69. "\r\n";
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  70. 9 {4 `- U$ d3 Q+ ?9 q
  71. echo "dohandshake ".$upgrade.chr(0);           5 `, }* z9 s+ J- z; \4 J! M
  72. // 写入socket
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  73. socket_write($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  N( N8 C6 d; ~* U, V, G3 J9 B; w
  75. $this->handshake = true;
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  76. }2 A, |# [0 ?1 Y& W
  77. $ _) n3 N. `3 T# x' \) z% J
  78. 5 X. k  N+ [& {3 R, M% ~
  79. function encry($req)& P; S* v  l% ^" p$ o' X; B) P( Y
  80. {% d4 `; t6 _# i- G7 M+ N8 @
  81. $key = $this->getKey($req);
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  82. $mask = "258EAFA5-E914-47DA-95CA-C5AB0DC85B11";  Q& Y7 v1 b- H& W: h
  83. ; G* B9 A; [4 i8 R! ]
  84. return base64_encode(sha1($key . '258EAFA5-E914-47DA-95CA-C5AB0DC85B11', true));! `# r/ o7 l' ^! D: l$ [; C
  85. }
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  86. - S% @, @1 ]9 ?9 D
  87. function getKey($req) 4 @2 P/ w$ N5 i% V6 S% e( t
  88. {
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  89. $key = null;; D4 z& Z' C+ Q8 Y! H6 R( f" W
  90. if (preg_match("/Sec-WebSocket-Key: (.*)\r\n/", $req, $match)) {
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  91. $key = $match[1];
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  92. }* o: f) x. V% T/ @
  93. return $key;
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  94. }
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  95. # ~' y' B  Y! ?7 p, `
  96. // 解析数据帧/ T0 \! s! h7 w3 U6 k
  97. function decode($buffer)  7 m5 q: _: e6 ]9 \
  98. {
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  99. $len = $masks = $data = $decoded = null;
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  100. $len = ord($buffer[1]) & 127;( l5 j* I6 H$ F* T) T3 v
  101. " ~$ I$ Z8 J: o) w. S$ p) f
  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)  {
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  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);  ~  P8 b0 Q* h* U) G; X- |# Z
  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];3 {2 f* f. ?2 ^" |. `+ u
  114. }
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  115. return $decoded;
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  116. }) f6 g0 |! S" h1 g
  117. % R1 f: U, p( |; H  m# j6 g; K
  118. // 返回帧信息处理
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  119. function frame($s)
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  120. {
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  121. $a = str_split($s, 125);4 E; S2 C& P1 c, n* s
  122. if (count($a) == 1) {
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  123. return "\x81" . chr(strlen($a[0])) . $a[0];2 e/ \, s) j- {) M+ ~2 n- w
  124. }
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  125. $ns = "";% ]' |7 N8 z$ }+ d+ E* K1 T& j
  126. foreach ($a as $o) {) g/ C- X% I0 D# [$ c
  127. $ns .= "\x81" . chr(strlen($o)) . $o;/ p3 T, r# Y  b# C  o4 |( n
  128. }
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  129. return $ns;2 Y7 c, R7 L, R: X: X# A0 N: R
  130. }
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  131. % w9 M6 U  X" u# b
  132. // 返回数据
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  133. function send($client, $msg)9 d0 G4 q6 }" }0 S) E# a
  134. {; v9 V( U: X  q, c- S4 t
  135. $msg = $this->frame($msg);3 @+ w8 |1 h, f/ e: w: O# n1 Q
  136. socket_write($client, $msg, strlen($msg));9 j! m- g) L. N( {. i
  137. }
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  138. }) l2 H2 c" a% o& R) H$ x6 A3 t

  139. ! f! ]  S! L) d$ z" M: R
  140.    测试    $ws = new WS("127.0.0.1",2000);3 J, ~7 e9 \" x+ ?' i

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复制代码
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