如何刷新彗星中的会话? [英] How do i refresh the session in comet?
问题描述
我想在页面上放置类似彗星的iframe，但是当会话更改iframe中的信息时，不是，并且我在iframe中做了$_SESSION变量的转储，它没有改变.
I want to have a comet-like iframe on my page, but when the session changes the info in the iframe does not and i did a dump of the $_SESSION variable in the iframe and it was not changing.
我的问题是，当客户端$_SESSION更改时，如何更新彗星iframe中的$_SESSION变量?
My question is, how do i update the $_SESSION variable in the comet iframe when the client $_SESSION changes?
非常感谢^ _ ^
使用代码更新:
客户端:
<?php
session_start();
if(!isset($_SESSION['count'])) $_SESSION['count'] = 0;
?>
<!DOCTYPE HTML PUBLIC "-//W3C//DTD HTML 4.01 Transitional//EN">
<html>
<head>
<title>Test Comet</title>
<meta http-equiv="Content-Type" content="text/html; charset=UTF-8">
<script type='text/javascript' src='../js/jquery.js'></script>
<script type="text/javascript">
function test_function(msg){
$('p').html(msg)
}
$('div').click(clickMe);
function clickMe(event){
$.ajax({
url: 'addSess.php'
})
}
</script>
</head>
<body>
<p>This is a test</p>
<div>click me</div>
<iframe src="output.php" width="0" height="0" style="display: none;"></iframe>
</body>
</html>
comet iframe(output.php):
comet iframe (output.php):
<?php
session_start();
ob_start();
echo 'hello';
flush_buffers();
while(true){
echo "<script>window.parent.test_function('".time().' session: '.$_SESSION['count']."');</script>";
flush_buffers();
sleep(1);
}
function flush_buffers(){
ob_end_flush();
ob_flush();
flush();
ob_start();
}
?>
addSess.php:
addSess.php:
<?php
session_start();
if(!isset($_SESSION['count'])) $_SESSION['count'] = 0;
$_SESSION['count']++;
echo $_SESSION['count'];
?>
我还注意到的另一件事是，它冻结了浏览器进入我的网站的速度，一旦我关闭客户端，其他所有内容就会加载
also another thing i noticed is that its freezing up the browser from going to my site, as soon as i close the client, everything else loads
推荐答案
只要对$_SESSION进行了更改，所有重新加载到执行var_dump($_SESSION);的iframe都应看到新的会话.您是否正确使用 session_start()?
As long as you make changes to the $_SESSION, all reloads to the iframe that does var_dump($_SESSION); should see the new session. Are you properly using session_start()?
请更新一些代码，我们将为您提供帮助.
Update with some code please and we'll see how we can help.
更新
首先，您的彗星页面需要set_time_limit(0);，因此它可以无限期运行(连接仍然可以断开，您需要执行一些操作以重新启动彗星连接)
First off, your comet page needs set_time_limit(0); so it runs indefinitely (the connection can still get cut off and you'd need to do something to restart the comet connection)
第二，输出缓冲可能会给您带来错误，从某种意义上说，PHP有点奇怪，因此我的本地测试不适用于您的代码.如果我添加以下行:
Second off, output buffering might be giving you errors, PHP is wonky in that sense, my local test doesn't work with your code because of it. If I add the line:
<iframe src="output.php" width="0" height="0" style="display: none;" onload="alert('Iframe Loaded');"></iframe>
我在更新主页的同时收到警报，这意味着刷新缓冲区实际上无法刷新缓冲区.当代码在这里工作时，我会返回.
I get the alert at the same time as the update to the main page, meaning flush buffers failed to actually flush buffers. I'll return when I get the code working here.
UPDATE2
叹息.简单...
$('div').click(clickMe);
需要在HTML DOM加载后调用.尝试:
Needs to be called after the HTML DOM loads. try:
$(function(){
$('div').click(clickMe);
});
此外，您还应该考虑将彗星代码更改为此:
Also you should consider changing your comet code to this:
<?php
session_start();
ob_implicit_flush(true);
ob_end_flush();
echo 'hello';
while(true){
echo "<script>window.parent.test_function('".time().' session: '.$_SESSION['count']."');</script>";
sleep(1);
}
?>
通过执行 ob_implicit_flush ，您不需要不断调用flush_buffers.您还需要ob_end_flush取消输出缓冲.
By doing ob_implicit_flush you don't need to call flush_buffers constantly. You also need ob_end_flush to cancel output buffering.
您还应该注意，需要 session_destroy .否则，您的站点将等待彗星会话关闭，然后才能开始新的会话.
You should also take note that session_destroy is needed. Otherwise your site waits for the comet session to close before it can start a new session.
session_start()实际工作的方式，是等待会话变为可用.这意味着您需要使用 session_id 为彗星生成不同的会话或使用文件...或采用其他技术.
The way session_start() actually works, is it waits for the session to become available. This means you need to use session_id to generate a different session for your comet or use files... or employ some other technique.
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