On 18 Jun '08, at 3:01 AM, Marc Monguio wrote:
The documentation I've found about "Conditional GET" in the web says I should be sending "If-Modified-Since" and "If-None-Match" headers with the contents of "Last-Modified" and ETag" headers from the last server's answer. However it doesn't look like a NSURLRequest with a NSURLRequestUseProtocolCachePolicy is adding the "If-None-Match" header. Fortunately it adds the "Last-Modified" header automatically so I've tweaked my server-side to be able to work just with this header for caching.Is this a bug in NSURLRequestUseProtocolCachePolicy ?
I think so; or at least a case where it's not being as optimal as it could be.
When debugging the status in the "connection:didReceiveResponse:" delegate method the statusCode is always 200. I knew for sure than in fact it was being cached so I ran "tcpdump" and I saw that except the first call the rest were always Status Code 304 Not Modified. Why I can't see what I really get from the server in my code?
I think the framework does this intentionally since it's hiding the details of the caching from you. Since you didn't explicitly add an if- modified-since header to your request, a 304 response wouldn't be a valid status code for the request as you generated it.
When I've implemented conditional requests, I've always added the necessary headers myself. I haven't used the CFNetwork cache at all in these cases; but I think you could do so by first sending the request in use-cache-only mode, checking the mod date and etag of the response, and then sending a request with your own if-none-match and if-modified-since headers, using the ignore-cache mode.
—Jens
smime.p7s
Description: S/MIME cryptographic signature
_______________________________________________ Cocoa-dev mailing list (Cocoa-dev@lists.apple.com) Please do not post admin requests or moderator comments to the list. Contact the moderators at cocoa-dev-admins(at)lists.apple.com Help/Unsubscribe/Update your Subscription: http://lists.apple.com/mailman/options/cocoa-dev/archive%40mail-archive.com This email sent to [EMAIL PROTECTED]
