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Flex and PHP code with IE Cache or POST issue

Answer 1

+1 A:

I've been using a tool called Fiddler lately, which lets you watch the web traffic on your system, and even modify the requests and responses. In your case, you'll want to install it, and set it up as a reverse proxy so that your flex app communicates through it to the PHP layer.

Once that's set up, you can more easily track what's happening with your data. (I found a JSON plugin for mine that lets me view the JSON structure as a tree, but it natively supports an XML view)

Once you understand and explain the traffic a bit better, I might be able to help you out. It doesn't sound like a 304 HTTP problem. Confirm that the data is being returned to IE.

Glenn 2009-09-14 20:47:30

I do know that it is being returned because it will show up sometimes after a couple of refreshes or a restart of IE. I know it is being added to the database the first time because I am watching it in MySQL. Would adding a timestamp to my PHP form call help to fix this?

joshholat 2009-09-15 11:09:35

You need something to confirm that the data is being fetched by IE when you expect it to be. You need to find out what is happening that requires IE to be restarted. It sounds like a cache issue, but installing something like Fiddler will help you see the differences between browsers. But you can also try looking at the webserver logs and comparing the responses between different browsers. You need to try to eliminate parts that could be the problem. DB, PHP, Web server, Browser, Flex....

Glenn 2009-09-15 11:46:03

It's almost certainly a cache-header problem; you need to make sure that your HTML pages are being delivered with proper headers that indicate that cached copies may not be reused.Internet Explorer may cache and reuse the response to a GET request if the server does not send any headers prohibiting caching. Workarounds: Either use the POST method, a random query string, or (best) configure the server to send proper cache directives. Note: Using a non-random query string alone is not enough to prevent caching. See www.fiddler2.com/redir/?id=httpperf

EricLaw -MSFT- 2009-09-15 13:46:53

Answer 2

A:

IE is notorious for caching stuff like ajax requests. General rule of thumb - on important requests that shouldnt be cached, make sure the pragma header is set to no-cache....

so in php call:

    header("Pragma: no-cache");

before content is rendered / returned to the browser. A more in depth interpretation can be found here: http://thecodeabode.blogspot.com/2010/10/cache-busting-ajax-requests-in-ie.html

Ben 2010-10-06 06:59:17

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Flex and PHP code with IE Cache or POST issue

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