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Posts: 1
Registered: ‎02-12-2013
My Device: BB9900
My Carrier: someone

blackberry proxy not honoring the If-Modified-Since XMLHTTPRequest header

Hello,

 

I suspect there's an issue with web access using a blackberry and my web application using the If-Modified-Since XMLHTTPRequest header.

 

In a simplyfied example, my application gets a file using a javascript XMLHTTPRequest.

It looks at the "Last-Modified" response header and uses this as "If-Modified-Since" for following requests.

 

On a PC browser with no proxies, the first request returns a 200 status while the following ones return a 304 (not modified) status as expecetd (the target file of the example does not change, if I manually change it then the 200 status is properly returned).

 

On my blackberry browser (BB990 with enterprise server) every request returns a 200 code, it looks like the If-Modified-Since header is not honored.

 

Example page (just click on submit a couple of time and see the received headers):

 

http://pgn4web-backup.casaschi.net/t.html

 

Any idea why the blackberry behaves diferently and how to force it to honour the If-Modified-Since header?

 

Thanks in advance.