php實現socket推送技術的示例

2024-05-04 21:50:44

字體：大中小

來源：轉載

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在socket出現之前已經有ajax定時請求、長輪詢等方案，但都不能滿足需求，socket就應用而生了。

socket基本函數socket

總結下常用的socket函數

服務端：socket_create 創建socket設置基本參數

socket_bind 綁定ip和端口號

socket_listen 監聽

socket_accept 客戶端的連接

socket_read 讀取客戶端的數據

socket_write 給單獨客戶端發送數據

socket_close 關閉連接

客戶端：socket_create 創建socket設置基本參數

socket_connect 連接socket

socket_write 給服務端發送數據

socket_read 讀取服務端數據

socket_close 關閉連接

H5websocket不多說了，上鏈接

OK，開始貼代碼~

--------------分割線

服務端代碼：

<?php

class WS {

var $master;

var $sockets = array();

var $debug = false;//true為調試模式，輸出log日志

var $handshake = array();

function __construct($address, $port){

$this->master=socket_create(AF_INET, SOCK_STREAM, SOL_TCP) or die("socket_create() failed");

socket_set_option($this->master, SOL_SOCKET, SO_REUSEADDR, 1) or die("socket_option() failed");

socket_bind($this->master, $address, $port)  or die("socket_bind() failed");

socket_listen($this->master,20)  or die("socket_listen() failed");



$this->sockets[] = $this->master;

$this->say("Server Started : ".date('Y-m-d H:i:s'));

$this->say("Listening on : ".$address." port ".$port);

$this->say("Master socket : ".$this->master."/n");



while(true){

$socketArr = $this->sockets;

$write = NULL;

$except = NULL;

socket_select($socketArr, $write, $except, NULL); //自動選擇來消息的socket 如果是握手自動選擇主機

foreach ($socketArr as $socket){

if ($socket == $this->master){ //主機

  $client = socket_accept($this->master);

  if ($client < 0){

  $this->log("socket_accept() failed");

  continue;

  } else{

  $this->connect($client);

  }

} else {

  $bytes = @socket_recv($socket,$buffer,2048,0);

  if ($bytes == 0){

  $this->disConnect($socket);

  }

  else{

  $key = array_search($socket, $this->sockets);

  if (emptyempty($this->handshake) || !isset($this->handshake[$key]) || !$this->handshake[$key]){

  $this->doHandShake($socket, $buffer, $key);

  }

  else{

  $buffer = $this->decode($buffer);

  echo $buffer.PHP_EOL;

  $key = array_search($socket, $this->sockets);

  $arr = $this->sockets;

  array_shift($arr);

  foreach ($arr as $s){

  $this->send($s, $buffer);

  }

  }

  }

}

}

}

}



function send($client, $msg){

$msg = $this->frame($msg);

socket_write($client, $msg, strlen($msg));

}

function connect($socket){

array_push($this->sockets, $socket);

$this->say("/n" . $socket . " CONNECTED!");

$this->say(date("Y-n-d H:i:s"));

}

function disConnect($socket){

$index = array_search($socket, $this->sockets);

socket_close($socket);

$this->say($socket . " DISCONNECTED!");

if ($index >= 0){

echo 'unset index is:'.PHP_EOL;

unset($this->sockets[$index]);

}

}

function doHandShake($socket, $buffer, $handKey){

$this->log("/nRequesting handshake...");

$this->log($buffer);

list($resource, $host, $origin, $key) = $this->getHeaders($buffer);

$this->log("Handshaking...");

$upgrade = "HTTP/1.1 101 Switching Protocol/r/n" .

  "Upgrade: websocket/r/n" .

  "Connection: Upgrade/r/n" .

  "Sec-WebSocket-Accept: " . $this->calcKey($key) . "/r/n/r/n"; //必須以兩個回車結尾

$this->log($upgrade);

$sent = socket_write($socket, $upgrade, strlen($upgrade));

$this->handshake[$handKey]=true;

$this->log("Done handshaking...");

return true;

}

function getHeaders($req){

$r = $h = $o = $key = null;

if (preg_match("/GET (.*) HTTP/" ,$req,$match)) { $r = $match[1]; }

if (preg_match("/Host: (.*)/r/n/" ,$req,$match)) { $h = $match[1]; }

if (preg_match("/Origin: (.*)/r/n/" ,$req,$match)) { $o = $match[1]; }

if (preg_match("/Sec-WebSocket-Key: (.*)/r/n/",$req,$match)) { $key = $match[1]; }

return array($r, $h, $o, $key);

}

function calcKey($key){

//基于websocket version 13

$accept = base64_encode(sha1($key . '258EAFA5-E914-47DA-95CA-C5AB0DC85B11', true));

return $accept;

}

function decode($buffer) {

$len = $masks = $data = $decoded = null;

$len = ord($buffer[1]) & 127;

if ($len === 126) {

$masks = substr($buffer, 4, 4);

$data = substr($buffer, 8);

}

else if ($len === 127) {

$masks = substr($buffer, 10, 4);

$data = substr($buffer, 14);

}

else {

$masks = substr($buffer, 2, 4);

$data = substr($buffer, 6);

}

for ($index = 0; $index < strlen($data); $index++) {

$decoded .= $data[$index] ^ $masks[$index % 4];

}

return $decoded;

}

function frame($s){

$a = str_split($s, 125);

if (count($a) == 1){

return "/x81" . chr(strlen($a[0])) . $a[0];

}

$ns = "";

foreach ($a as $o){

$ns .= "/x81" . chr(strlen($o)) . $o;

}

return $ns;

}



function say($msg = ""){

echo $msg . "/n";

}

function log($msg = ""){

if ($this->debug){

echo $msg . "/n";

} //Vevb.com

}

}



new WS('localhost', 4000);

客戶端代碼（H5）：

<html>

<head>

<title>demo</title>

<script src="https://cdn.boot<a href="http://www.111cn.net/cssdiv/css.html" class="anchor" target="_blank">css</a>.com/jquery/1.9.1/jquery.min.js"></script>

</head>

<body>

<input type="text" id="content">

<input type="button" value="send" id="send">

<script type="text/javascript">

  var ws = new WebSocket("ws://localhost:4000");

  ws.onopen = function(){

  console.log("握手成功");

  }

  ws.onmessage = function(e){

  console.log("message:" + e.data);

  }

  ws.onerror = function(){

  console.log("error");

  }

  $("#send").click(function(){

  content = $("#content").val();

  console.log(content);

  ws.send(content);

  })

</script>

</body>

</html>