NSURLRequest conditional GET
NSURLRequest conditional GET
- Subject: NSURLRequest conditional GET
- From: Marc Monguio <email@hidden>
- Date: Wed, 18 Jun 2008 12:01:52 +0200
Some weird things seem to happen with NSURLRequest when used with
NSURLRequestUseProtocolCachePolicy :
1)
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 ?
2)
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?
- (void)connection:(NSURLConnection *)connection didReceiveResponse:
(NSURLResponse *)response;
{
NSHTTPURLResponse *httpResponse = (NSHTTPURLResponse *)response;
int statusCode = [httpResponse statusCode];
NSLog(@"StatusCode: %d", statusCode);
// ...
regards,
Marc
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