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<!DOCTYPE html PUBLIC "-//W3C//DTD XHTML 1.0 Transitional//EN" "http://www.w3.org/TR/xhtml1/DTD/xhtml1-transitional.dtd">
<html xmlns="http://www.w3.org/1999/xhtml">
<head>
<meta http-equiv="Content-Type" content="text/html; charset=utf-8" />
<title>无标题文档</title>
</head>
<body>
<a href="javascript:void(0);" id="aaa">aaa</a>
<a href="javascript:void(0);" id="bbb">bbb</a>
<a href="javascript:void(0);" id="ccc">ccc</a>
<input type="text" id="ddd" />
<script type="text/javascript">
function test(a){
this.classname = a;
}
test.prototype.load_js = function(url){ // 在当前页面head里加载js
var head = document.getElementsByTagName("head")[0];
var creater = document.createElement("script");
creater.src = url;
head.appendChild(creater);
creater.onload = creater.onreadystatechange = function(){
if(!(creater.readyState) || creater.readyState == "loaded"){
head.removeChild(creater);
}
};
}
test.prototype.frame_load_js = function(url){ // 在iframe的head里加载js
var head = this.iframe.contentDocument ? this.iframe.contentDocument.getElementsByTagName("head")[0] : this.iframe.document.getElementsByTagName("head")[0];
var creater = document.createElement("script");
creater.src = url;
head.appendChild(creater);
creater.onload = creater.onreadystatechange = function(){
if(!(creater.readyState) || creater.readyState == "loaded"){
head.removeChild(creater);
}
};
}
test.prototype.listen = function(){ // 长连接
var url = "b.php?classname="+this.classname+"&ram="+Math.round(Math.random()*10000);
this.frame_load_js(url);
}
test.prototype.get_alert = function(res){ // 长连接返回的结果
this.save_result = res;
alert(res["words"]);
}
test.prototype.speak = function(){ // 发送消息的连接
var words = document.getElementById("ddd").value;
var url = "c.php?words="+encodeURIComponent(words)+"&classname="+this.classname+"&ram="+Math.round(Math.random()*10000);
this.frame_load_js(url);
}
test.prototype.init = function(){ // 初始化
var _this = this;
// 创建一个iframe,用iframe
this.iframe = document.createElement("iframe");
this.iframe.style.display = "none";
document.getElementsByTagName("body")[0].appendChild(this.iframe);
document.getElementById("aaa").onclick = function(){ _this.listen();};
document.getElementById("bbb").onclick = function(){ _this.speak();};
}
var zz = new test("zz");
zz.init();
</script>
</body>
</html>
<?php
$host = '127.0.0.1';
$user = 'root';
$pwd = '123456';
$db = 'chatter';
$charset = 'utf8';
$conn = mysql_connect($host, $user, $pwd) or die('Cannot connect database!');
mysql_set_charset($charset);
mysql_select_db($db);
session_start();
$data = array();
while (empty($data)){
$time_flag = !empty($_SESSION['time_flag']) ? $_SESSION['time_flag'] : 0;
$sql = 'SELECT * FROM tester WHERE saytime >= '.$time_flag;
$query = mysql_query($sql);
$rows = mysql_num_rows($query);
if (!empty($rows)){
$rs = mysql_fetch_assoc($query);
$data = $rs;
if (!empty($data)){
echo 'parent.'.$_GET['classname'].'.get_alert('.json_encode($data).');';
$_SESSION['time_flag'] = time();
exit();
}
}
$_SESSION['time_flag'] = time();
sleep(2);
}
?>
<?php
$host = '127.0.0.1';
$user = 'root';
$pwd = '123456';
$db = 'chatter';
$charset = 'utf8';
$conn = mysql_connect($host, $user, $pwd) or die('Cannot connect database!');
mysql_set_charset($charset);
mysql_select_db($db);
session_start();
$words = trim($_GET['words']);
$sql = 'INSERT INTO tester (words, saytime) VALUES ("'.$words.'", "'.time().'")';
$query = mysql_query($sql);
echo 'alert(1);';
?>
<?php
$host = '127.0.0.1';
$user = 'A';
$pwd = 'B';
$db = 'chatter';
$charset = 'utf8';
$conn = mysql_connect($host, $user, $pwd) or die('Cannot connect database!');
mysql_set_charset($charset);
mysql_select_db($db);
$data = array();
while (empty($data)){
$time_flag = !empty($_COOKIE['time_flag']) ? $_COOKIE['time_flag'] : 0;
$sql = 'SELECT * FROM tester WHERE saytime >= '.$time_flag;
$query = mysql_query($sql);
$rows = mysql_num_rows($query);
if (!empty($rows)){
$rs = mysql_fetch_assoc($query);
$data = $rs;
if (!empty($data)){
setcookie("time_flag", time(), time()+3600);
echo 'parent.'.$_GET['classname'].'.get_alert('.json_encode($data).');';
exit();
}
}
sleep(2);
}
?>