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Re: Convincing XMLHTTP.3.0 to refresh a fresh resource

From: RichF@-----------.---------.---
To: NULL
Date: 4/2/2007 3:04:00 AM

"Anthony Jones" wrote:
<snip>

> The point I was trying to communicate is that a browser offers the user the
> opportunity to override the normal operation of the local cache by using the
> refresh button.  This causes all requests to fulfill the page to pass
> through local cache to the origin server regardless of whether there is
> fresh instance of the resource in the cache.
> 
> I'm trying to implement a similar feature for resources that have been
> fetched with XMLHTTP.  For performance reasons I do not want to send a
> request every time it's needed however I want to offer the user the same
> 'refresh' option.
<snip>

Just considering this last point.....

The only method that worked reliably for me was adding the If-Modified-Since 
header and making sure that the date I used was definitely older than any 
timestamp that might be associated with the file.  (I used IE6 and 
XMLHTTP.3.0)


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