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PONSURLCache Problem with cache response
 

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    <p>I'm writing an iPhone application, one of it's tabs is a twitter feed, i'm parsing twitter xml and putting it nicely inside a table view. In case there is no internet connection I would like to show cache results of the last time we had internet connection and the tables were updated. I'm using NSURLCache for that like so:</p> <pre><code>NSURLRequest *theRequest = [NSURLRequest requestWithURL:[NSURL URLWithString:xmlLink] cachePolicy:NSURLRequestReturnCacheDataElseLoad timeoutInterval:60]; NSURLCache *sharedCache = [NSURLCache sharedURLCache]; NSCachedURLResponse *response = [sharedCache cachedResponseForRequest:theRequest]; if (response) { NSLog(@"Got Response"); } else { NSLog(@"Didn't got Response"); } self.objectFeedConnection = [[[NSURLConnection alloc] initWithRequest:theRequest delegate:self startImmediately:YES] autorelease]; </code></pre> <p>I can see that for the first time NSLog outputs "Didn't got response" since it's the first time visiting this website (<a href="http://www.twitter.com/.." rel="nofollow noreferrer">http://www.twitter.com/..</a>.) I can also see that the response is being cached, since i implemented the willCacheResponse method which is being called after the initWithRequest was launched, like so:</p> <pre><code> - (NSCachedURLResponse *) connection:(NSURLConnection *)connection willCacheResponse:(NSCachedURLResponse *)cachedResponse { NSLog(@"willCache Reponse"); NSCachedURLResponse *newCachedResponse = nil; if ([[[[cachedResponse response] URL] scheme] isEqual:@"http"]) { newCachedResponse = [[[NSCachedURLResponse alloc] initWithResponse:[cachedResponse response] data:[cachedResponse data] userInfo:nil storagePolicy:[cachedResponse storagePolicy]] autorelease]; } return newCachedResponse; } </code></pre> <p>The second time i visit this site i can clearly see that NSLog outputs "Got Response" which means that there was a cache hit, hence willCacheResponse should <strong>not</strong> be called again, but for some strange reason it is called again and again and does not pull the information out of the cache, instead it try to cache it again.</p> <p>Any idea what causing this issue ?</p> <p>Thanks!</p>
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    1. COI tried all kind of Policies. Basically i need to use NSURLRequestUseProtocolCachePolicy, always load from remote if there is internet connection, else load from cache, but both are giving me the same issue.
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