I am trying to use NSURLConnection to fetch a few small images (like
10k) from various websites. The connections are established and then
the connection:willSendRequest:redirectResponse: delegate method is
called and it freezes. It never times out that I know of, at least
the connection:didFailWithError: delegate is never called. So now for
the crazy part... sometimes the code works fine and all of the images
are retrieved. I have tested this with several different sites and it
seems to be fairly random. I have tried different caching policies as
well with no change. If it fails, it always seems to fail after the
redirect is received. I am running this on Leopard with GC enabled.
Below is the code I am using, I removed all the log messages I was
using for debugging. If anyone has any ideas they would be greatly
appreciated.
NSURLRequest *request=[NSURLRequest requestWithURL:[NSURL
URLWithString:imageURL]
cachePolicy:NSURLRequestReloadIgnoringLocalCacheData
timeoutInterval:30.0];
NSURLConnection *imageConnection = [[NSURLConnection alloc]
initWithRequest:request
delegate:self];
if (!imageConnection) {
NSLog(@"A problem was encountered while trying to download an
image from %@", imageURL);
}
----------------delegate methods-----------------
- (void)connection:(NSURLConnection *)connection
didReceiveResponse:(NSURLResponse *)response
{
[receivedData setLength:0];
}
- (void)connection:(NSURLConnection *)connection didReceiveData:(NSData *)data
{
[receivedData appendData:data];
}
- (NSURLRequest *)connection:(NSURLConnection *)connection
willSendRequest:(NSURLRequest *)request
redirectResponse:(NSURLResponse *)redirectResponse
{
return request;
}
- (void)connection:(NSURLConnection *)connection
didFailWithError:(NSError *)error
{
NSLog(@"Error: %@", [error localizedDescription]);
}
- (void)connectionDidFinishLoading:(NSURLConnection *)connection
{
image = [[NSImage alloc] initWithData:receivedData];
if (!image || ![image isValid]) {
image = [NSImage imageNamed:@"missingImage.tiff"];
}
}
-Doug
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