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[php学习资料] PHP 简单实现webSocket

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发表于 2018-10-27 12:35:15 | 只看该作者 回帖奖励 |倒序浏览 |阅读模式
1)客户端实现
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  1. <html>
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  2. <head>1 n1 }- c4 d* O$ Q; k; `: L
  3. <meta charset="UTF-8">
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  4. <title>Web sockets test</title># U+ O: H. N1 O/ k' c
  5. <script src="jquery-min.js" type="text/javascript"></script>5 [3 q9 V$ U2 J. }5 s: [( B
  6. <script type="text/javascript">
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  7. var ws;
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  8. function ToggleConnectionClicked() {          5 O) O. y) p0 p& y. Q3 w/ z/ z
  9. try {
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  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);};
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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);};: s1 m2 x3 w2 r! p5 m7 f7 h; q, H( H
  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) {1 P6 _5 {  Y6 _! q$ e
  16. alert(ex.message);      
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  17. }' O0 L' ?" s! l) Z% ]  d- p
  18. };
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  19. 7 J' x' {& l, p, c! p0 |* m
  20. function SendData() {8 A! O& N* A8 Q* i4 j8 N
  21. try{
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  22. var content = document.getElementById("content").value;
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  23. if(content){
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  24. ws.send(content);
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  25. }$ V# S1 S* a, P+ A. {9 |( D/ P

  26. 0 i$ N' S2 ^. }) v
  27. }catch(ex){6 l. N1 G3 t9 f8 n3 t: [. y4 W% |
  28. alert(ex.message);% Z6 y$ D4 l3 @! E6 c* k
  29. }
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  30. };
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  31. ' Q# T, ]+ [4 n
  32. function seestate(){" c/ Y+ p3 ^0 n
  33. alert(ws.readyState);) Y4 z4 r; k1 u& J
  34. }
    9 P& H! T* r) {* `

  35. " L7 E" O& K' `
  36. </script>
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  37. </head>' X2 ?$ D& V  X
  38. <body>( Y' w2 ?+ x( F6 b. z$ S5 G  B
  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>" x) Y+ M! Z$ J
  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. ( W' D( L5 [! W* O; p# \
  44. </body>
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  45. </html>  S; c, I: W1 L6 @- }. N
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5 R, s0 l5 i) A8 B2)服务器端实现: n4 {# _+ q) P8 Z0 C' O( l% F

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  1. class WS {9 ?+ a. V1 D9 m3 O5 U
  2. var $master;  // 连接 server 的 client9 h8 [* q7 l$ c) w5 X" O
  3. var $sockets = array(); // 不同状态的 socket 管理3 y9 z0 Q) B7 p% u4 z! f- ]. k
  4. var $handshake = false; // 判断是否握手* D4 n: I& d+ `; g/ r
  5. - n, f. H5 F" r
  6. function __construct($address, $port){
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  7. // 建立一个 socket 套接字' m; k, D/ o$ A6 B  q
  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)  , J' R3 |4 l% X( G5 `# F0 k
  11. or die("socket_option() failed");
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  12. socket_bind($this->master, $address, $port)                    
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  13. or die("socket_bind() failed");
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  14. socket_listen($this->master, 2)                              
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  15. or die("socket_listen() failed");# }/ f/ J/ x$ I
  16. 8 `; V, [* n9 r+ r/ k, ?2 D
  17. $this->sockets[] = $this->master;" V7 h( {- x/ g7 Q
  18. + i  ^! M) ~( Y9 {# n& R: q( h6 M& b
  19. // debug) E6 k* R- }( W6 N2 ?# T+ o
  20. echo("Master socket  : ".$this->master."\n");8 Y- W5 u% G( w! L7 Q
  21. $ N7 D3 p0 x. g' P" e9 ^' M0 V
  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0 `  Y+ F: ?7 O; \/ d
  24. $write = NULL;
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  25. $except = NULL;5 l  X! f5 f# h8 y
  26. socket_select($this->sockets, $write, $except, NULL);" `! v# y0 {' l9 G/ ?- g6 B

  27. # R8 r& @& K8 B$ i# X3 }
  28. foreach ($this->sockets as $socket) {
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  29. //连接主机的 client 9 s: }9 U5 u4 J# o6 L5 i* y
  30. if ($socket == $this->master){
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  31. $client = socket_accept($this->master);/ [3 n+ G: z$ B: B# M  K
  32. if ($client < 0) {
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  33. // debug% G& J- y/ [: Y
  34. echo "socket_accept() failed";
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  35. continue;* u9 W6 u. R% ?% w2 Y. j0 D7 N
  36. } else {
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  37. //connect($client);7 \) `: c' u' ?: g' T- U' i% c8 s" e6 F
  38. array_push($this->sockets, $client);
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  39. echo "connect client\n";# h0 n* I( S$ Y/ t1 }1 o# q) q3 _: g
  40. }
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  41. } else {2 A+ {6 x# N) C# m" {; o2 k5 ~
  42. $bytes = @socket_recv($socket,$buffer,2048,0);
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  43. print_r($buffer);1 l. {1 `+ h$ M, i
  44. if($bytes == 0) return;
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  45. if (!$this->handshake) {' H; T7 Q! E5 h9 d9 }
  46. // 如果没有握手,先握手回应0 ?2 D/ x" N2 [% ]' H6 ]
  47. $this->doHandShake($socket, $buffer);
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  48. echo "shakeHands\n";, G$ Z6 X- N/ Z) m' w6 ?' s
  49. } else {+ k/ i( u+ m8 ?* K5 p/ \$ J
  50. : ?) D# L1 `8 A' f! j9 t6 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);
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  53. //process($socket, $buffer);
      O& s4 e& b' w3 `; B
  54. echo "send file\n";1 g* |% I. o. |4 |! U6 ~8 v  T. e
  55. }0 ^# A5 r  K3 J2 k+ b% c& K2 I- z1 p
  56. }0 o; \5 w" {$ H( T6 M: U
  57. }( R5 \% U! L% ]' T: S7 C; E( a
  58. }
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  59. }
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  60. 3 K1 x8 L! H" y8 Y
  61. function dohandshake($socket, $req)) d9 l/ f( v. O6 U/ b0 F
  62. {: A9 n2 Q6 \! I
  63. // 获取加密key
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  64. $acceptKey = $this->encry($req);4 o) @, Z1 b6 c
  65. $upgrade = "HTTP/1.1 101 Switching Protocols\r\n" ./ x, D, K  Z+ ^1 {' z
  66. "Upgrade: websocket\r\n" .5 q; M% \$ q5 j  {' N; q. D" o
  67. "Connection: Upgrade\r\n" .: _  Y. x2 @8 }2 S# k. K; a
  68. "Sec-WebSocket-Accept: " . $acceptKey . "\r\n" .5 c5 s2 E7 s- l8 N
  69. "\r\n";
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  70. 5 g! s) ]$ ?/ J3 @
  71. echo "dohandshake ".$upgrade.chr(0);           
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  72. // 写入socket+ S6 u- c, U$ h* O, U* g- H
  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' o. q: U, @3 g* S, ^/ U
  75. $this->handshake = true;
    / k" ~3 N* X5 ^
  76. }/ G' F2 }$ ]/ o6 _" |& ^+ S; I0 a/ c
  77. ! q4 Z# p' B0 b" }7 I$ |
  78. 4 v& {  Y# R+ b, t0 d' Y
  79. function encry($req)3 o3 r6 Z" j& g  u
  80. {
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  81. $key = $this->getKey($req);- B3 J4 D( Q0 {! D8 |+ s- k0 u; w
  82. $mask = "258EAFA5-E914-47DA-95CA-C5AB0DC85B11";7 Y1 v6 s1 O( [. ^" T  }

  83. 5 ]6 K- ?0 p5 x0 |6 K
  84. return base64_encode(sha1($key . '258EAFA5-E914-47DA-95CA-C5AB0DC85B11', true));
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  85. }# u- k0 g7 j: C6 t! O5 v$ V. y' P4 `
  86.   R. V0 X, ~, S! P2 J8 K6 k( [1 C
  87. function getKey($req) " w; B3 b7 y, n- N
  88. {
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  89. $key = null;
      ~9 _; d: G$ q" m1 o9 ^" D
  90. if (preg_match("/Sec-WebSocket-Key: (.*)\r\n/", $req, $match)) {
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  91. $key = $match[1];
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  92. }8 H' x5 ~, W5 a0 L1 @( D/ W
  93. return $key;
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  94. }% b, Q# X; S0 A( i# M! c

  95. . u* O" N9 x; g
  96. // 解析数据帧/ [7 G3 J  c; M; l3 Z" Y) a0 y1 F
  97. function decode($buffer)  
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  98. {7 A4 Y) _6 h# J3 D
  99. $len = $masks = $data = $decoded = null;
    / w9 a, F- \' g0 [: L
  100. $len = ord($buffer[1]) & 127;5 Q3 f+ o1 `: R( O3 \) y2 }
  101. 4 W3 M0 h# ?6 }9 y8 l% V
  102. if ($len === 126)  {" n5 E% ]3 B  h: I  E( v! f* p9 h
  103. $masks = substr($buffer, 4, 4);
    0 O" j, g" q  y5 U" t
  104. $data = substr($buffer, 8);$ E0 k' C0 c9 Y
  105. } else if ($len === 127)  {7 z7 H5 V% V  r( A: ]
  106. $masks = substr($buffer, 10, 4);
    7 `" `2 H2 @& h7 D+ F& [; j
  107. $data = substr($buffer, 14);
    & X3 [- U- W( p1 U& F0 V
  108. } else  {1 H+ C* a4 q  _. }8 t- F5 `' t
  109. $masks = substr($buffer, 2, 4);# G+ ^6 P4 n  ]& ^6 o
  110. $data = substr($buffer, 6);! R2 b+ n; f6 J2 T6 L
  111. }$ P+ P, ]) X$ }$ M* J, R+ Z* z
  112. for ($index = 0; $index < strlen($data); $index++) {
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  113. $decoded .= $data[$index] ^ $masks[$index % 4];
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  114. }: c# u+ I1 j8 D$ q( s, k1 P
  115. return $decoded;" ?$ l+ O$ J6 ~1 ^' _& N& R! k
  116. }# j( c9 A* _, t- c
  117. , n- [* g2 S' i+ f' H" x8 L; I
  118. // 返回帧信息处理
    % N) A/ E- G* I! _3 m" w; H
  119. function frame($s)
    4 V" w) ^" r+ x) ?9 q3 B
  120. {: Q  a7 B. I; b6 f
  121. $a = str_split($s, 125);
    ! q- n' D0 W6 l: g8 {3 ^
  122. if (count($a) == 1) {1 G( w) S% _9 u  _7 H% i
  123. return "\x81" . chr(strlen($a[0])) . $a[0];
    1 p! f$ F3 z) {
  124. }
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  125. $ns = "";
    5 A4 K& \" F9 ]% n
  126. foreach ($a as $o) {
    + j& \5 b( L" Y$ O. `) d
  127. $ns .= "\x81" . chr(strlen($o)) . $o;
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  128. }2 A! n; t1 }0 h
  129. return $ns;
    - J; s4 @! I! [- _" |3 n5 Q& V9 z& C
  130. }; U0 ]5 b; X0 i( a: D! k' P3 D

  131. . w# `+ J3 x( Q; q4 u& {
  132. // 返回数据" o) b8 i% T: b0 Z+ \7 n7 r. L
  133. function send($client, $msg)4 [) o# [6 |9 z2 Q
  134. {
    - A6 T- u( {- F- S# Q
  135. $msg = $this->frame($msg);
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  136. socket_write($client, $msg, strlen($msg));* }5 a. x$ V8 l! ~( W
  137. }
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  138. }' f2 P" J4 N( s& `( w3 W5 P

  139. ( z0 x) ]9 J( R7 M/ V" p! K5 E
  140.    测试    $ws = new WS("127.0.0.1",2000);
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  141. * L/ O7 J% C  t; T
复制代码

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