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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: j' q2 t/ \# v9 J6 C- \( R6 s
  1. <html>  [+ w( x, L9 v! ^' X+ B/ [
  2. <head>
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  3. <meta charset="UTF-8">
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  4. <title>Web sockets test</title>" v* x' F: B7 L" |4 U5 n
  5. <script src="jquery-min.js" type="text/javascript"></script>
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  6. <script type="text/javascript"># Z9 A1 b% R# R4 q! G
  7. var ws;
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  8. function ToggleConnectionClicked() {         
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  9. try {- {/ w- r0 |1 X6 z- b# v
  10. ws = new WebSocket("ws://127.0.0.1:2000");//连接服务器        - S0 S; Y; X+ [" k* \5 z2 I
  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);};% g. x: F* m! V% q+ E  |$ ?
  12. ws.onmessage = function(event){alert("接收到服务器发送的数据：\r\n"+event.data);};  Y6 S5 J. G2 c: n
  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！");};. d: u2 N6 M/ d4 M
  15. } catch (ex) {2 G9 V0 {; W0 j- G: m5 d' o1 {
  16. alert(ex.message);      
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  17. }; L& U: t7 Z( R; k8 Q: @* ^* o
  18. };
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  19. 8 u+ K. \. V9 S6 W3 @( _
  20. function SendData() {
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  21. try{* l/ D" K) d1 N$ U
  22. var content = document.getElementById("content").value;
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  23. if(content){' J- y" N6 o4 ~
  24. ws.send(content);8 Y$ A8 J! z5 u  K- d3 S
  25. }5 F; T+ @6 X: \& r% e
  26. ' L# S7 N% z* K8 ~% f: i5 ^
  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. - }3 a: k( z/ ^2 i
  32. function seestate(){
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  33. alert(ws.readyState);9 i. ^$ v6 s+ v, R* x  j; ~
  34. }3 J2 J5 X( o8 u; ^

  35. * K8 V3 w" g& C* G8 c: P
  36. </script>
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  37. </head>, r1 V- V' K6 N" q! m% B
  38. <body>
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  39. <button id='ToggleConnection' type="button" onclick='ToggleConnectionClicked();'>连接服务器</button><br /><br />& l3 {/ K( ?' Y6 U# W1 ?
  40. <textarea id="content" ></textarea>3 q6 J) f* m0 Q  H2 _5 r
  41. <button id='ToggleConnection' type="button" onclick='SendData();'>发送我的名字：beston</button><br /><br />% }5 H1 j; o* H6 w2 o( _' k" T
  42. <button id='ToggleConnection' type="button" onclick='seestate();'>查看状态</button><br /><br />
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  43.   ]1 z' |: y1 F! a
  44. </body>
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  45. </html>" o& l; t. S7 E# K0 u* t# r5 @* c
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0 w' w" g$ ~4 D2 K& J1 p2）服务器端实现
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  1. class WS {+ R, T$ ?7 n- G& B- g
  2. var $master;  // 连接 server 的 client2 ~% ]& y9 R$ a; J
  3. var $sockets = array(); // 不同状态的 socket 管理( V, |( a0 P* U9 Y5 Z, U+ v
  4. var $handshake = false; // 判断是否握手% B4 d( z# Y6 x" L5 _

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  6. function __construct($address, $port){
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  7. // 建立一个 socket 套接字
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  8. $this->master = socket_create(AF_INET, SOCK_STREAM, SOL_TCP)   
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  9. or die("socket_create() failed");
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  10. socket_set_option($this->master, SOL_SOCKET, SO_REUSEADDR, 1)  
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  11. or die("socket_option() failed");. h0 Q- w% j; z1 Z2 h, c  k2 Q
  12. socket_bind($this->master, $address, $port)                    0 k+ z  e; y) \. z' J" U4 i0 m
  13. or die("socket_bind() failed");
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  14. socket_listen($this->master, 2)                               0 x. C% d. {+ ?/ ]! \
  15. or die("socket_listen() failed");
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  16. 8 a9 J% `. Z- k3 b
  17. $this->sockets[] = $this->master;
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  18. . v# G9 K3 T3 v% T# E* P
  19. // debug
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  20. echo("Master socket  : ".$this->master."\n");4 S6 f) g/ n+ w2 d* i; C7 g$ I

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  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: w' k4 m1 O7 {, [( `- f
  24. $write = NULL;! \* M: D5 N; R) o
  25. $except = NULL;
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  26. socket_select($this->sockets, $write, $except, NULL);+ r8 U* G2 _0 s" r9 q
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  28. foreach ($this->sockets as $socket) {
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  29. //连接主机的 client
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  30. if ($socket == $this->master){
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  31. $client = socket_accept($this->master);
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  32. if ($client < 0) {1 F3 _0 K0 `' {  S; r) j
  33. // debug% T! u, J2 J: e# K  z1 I! N
  34. echo "socket_accept() failed";' E/ |& p8 w* }$ C1 k2 p
  35. continue;
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  36. } else {
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  37. //connect($client);
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  38. array_push($this->sockets, $client);+ l8 P3 t6 m8 ^% x
  39. echo "connect client\n";7 Q" }: q* H0 t% m% f
  40. }
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  41. } else {
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  42. $bytes = @socket_recv($socket,$buffer,2048,0);# ~/ j) [& }" x
  43. print_r($buffer);
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  44. if($bytes == 0) return;
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  45. if (!$this->handshake) {
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  46. // 如果没有握手，先握手回应5 }$ h* f! J) D; Q9 h# O& J
  47. $this->doHandShake($socket, $buffer);
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  48. echo "shakeHands\n";
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  49. } else {9 r& ^! G$ ~/ H6 x& h
  50.   Z  Z1 R* g* a# u, d1 N9 b: m1 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);& a4 G# g! ?9 L) }6 j8 q+ r
  53. //process($socket, $buffer); 7 @- R1 \. H# q; C3 ^) `
  54. echo "send file\n";1 P) G6 h; A6 n" S8 E
  55. }
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  56. }
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  57. }! ~( Y% n; H, L/ z* {
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  59. }
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  60. + V9 q0 _2 l& h7 l9 K' V
  61. function dohandshake($socket, $req)+ n2 u$ ?' p- B' N& L: ^7 `+ c
  62. {- ?3 D% x" m" }8 C) |* M
  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" .% P& r2 m; Q4 {  T% G
  67. "Connection: Upgrade\r\n" .' ~) X" ?; z, n
  68. "Sec-WebSocket-Accept: " . $acceptKey . "\r\n" .
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  69. "\r\n";
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  70. 7 U1 K+ ~. T6 b
  71. echo "dohandshake ".$upgrade.chr(0);           ( f; J, n1 J6 ]
  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8 H4 @& A- F" o3 j
  75. $this->handshake = true;0 H5 R% z+ h! R) m0 p
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  78. 0 H; i3 i$ r; _& d8 C' m
  79. function encry($req)
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  80. {9 T7 }* Z5 O5 J& d" W! ~
  81. $key = $this->getKey($req);
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  82. $mask = "258EAFA5-E914-47DA-95CA-C5AB0DC85B11";- i! p5 r+ Z' c
  83. 1 n4 u- K9 H  m0 b4 _$ {
  84. return base64_encode(sha1($key . '258EAFA5-E914-47DA-95CA-C5AB0DC85B11', true));2 |& n7 J( c" O' J- H- [8 d3 v$ [
  85. }+ ], J4 N0 l4 @& K  K
  86. 6 J- R8 N0 x0 d! U6 h
  87. function getKey($req)
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  88. {
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  89. $key = null;
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  90. if (preg_match("/Sec-WebSocket-Key: (.*)\r\n/", $req, $match)) {
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  91. $key = $match[1]; , v( I: v0 F9 r; b' p' }" Z) f
  92. }# D8 b4 }* z3 t  C. A0 T- j: T
  93. return $key;( F6 l" g- X9 k! l$ O
  94. }+ p' V! P' S; j4 ~1 Z

  95. * |. Q  U- t! w! }& G+ R
  96. // 解析数据帧
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  97. function decode($buffer)  : s! e% E$ ^% H: V
  98. {
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  99. $len = $masks = $data = $decoded = null;
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  100. $len = ord($buffer[1]) & 127;
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  101. ) U. u6 X# M& i/ _
  102. if ($len === 126)  {1 U% R- a2 U  Y4 C% l' |
  103. $masks = substr($buffer, 4, 4);
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  104. $data = substr($buffer, 8);# C/ u- C" p. [7 }: Y
  105. } else if ($len === 127)  {/ t  |% o9 u7 ^" O1 v8 ~# q! `# G
  106. $masks = substr($buffer, 10, 4);/ r" }5 z/ o& W! `, H+ I) m/ R
  107. $data = substr($buffer, 14);5 W. j* ?4 @) x9 R& G9 _- t
  108. } else  {. z8 }: P+ n2 X; b2 l
  109. $masks = substr($buffer, 2, 4);7 v. E$ c/ F: J& Z% R; ?
  110. $data = substr($buffer, 6);
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  111. }
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  112. for ($index = 0; $index < strlen($data); $index++) {& r$ t" D  r3 j" j% y
  113. $decoded .= $data[$index] ^ $masks[$index % 4];$ H) w- @# T- X. [
  114. }
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  115. return $decoded;
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  116. }: p& O0 A: u6 z1 m% q3 U  q

  117. 4 L/ }! Y: b. V8 G
  118. // 返回帧信息处理3 a% H2 A$ r) j; P3 E5 a# ?( r
  119. function frame($s) 3 R; R, L* \2 B5 c: J% i& q
  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])) . $a[0];0 S: Z' z3 R5 d$ B8 T
  124. }5 C; Z) h* I. E% [8 O* j$ J0 J# \
  125. $ns = "";
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  126. foreach ($a as $o) {! k: C3 O, {$ d
  127. $ns .= "\x81" . chr(strlen($o)) . $o;
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  128. }3 k& K/ g/ j7 w; t" ]# \3 W
  129. return $ns;
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  130. }6 {; n2 r9 N$ C
  131. : k! n! v. r" P6 C" A1 o- d0 w' C6 l
  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);( w2 n* j5 A  j6 Y; \
  136. socket_write($client, $msg, strlen($msg));4 Y9 ^! V8 r4 _6 j. y/ s
  137. }
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  138. }
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  139. 9 i) d* f6 P7 g' R3 p
  140.    测试    $ws = new WS("127.0.0.1",2000);" k5 ^1 b7 |, n) E' H
  141. / }4 r' z' x  s4 ~: J& d1 `
复制代码

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