Question

I’m working on using the ObjectiveFlickr library to upload photos to Flickr from my iPhone app. I am able to authorize the app and perform general requests, but I am getting an error while trying to upload a photo. The photo is meant to be uploaded is an image captured using AVFoundation. Here is the relevant code:

UIImage *image = [[UIImage alloc] initWithData:imageData];
if ([[AppDelegate sharedDelegate].apiContext.OAuthToken length]) {
                    NSData *uploadData = UIImageJPEGRepresentation(image, 1);

                   if (!flickrRequest) {
                        flickrRequest = [[OFFlickrAPIRequest alloc] initWithAPIContext:[AppDelegate sharedDelegate].apiContext];
                        flickrRequest.delegate = self;
                        flickrRequest.requestTimeoutInterval = 60.0;
                    }

                    [flickrRequest uploadImageStream:[NSInputStream inputStreamWithData:uploadData] suggestedFilename:@"Test" MIMEType:@"image/jpeg" arguments:[NSDictionary dictionaryWithObjectsAndKeys:@"0", @"is_public", nil]];
                    [UIApplication sharedApplication].idleTimerDisabled = YES;

                    NSLog(@"Can upload photo");

The flickrRequest object is defined and @property‘d in the .h file pertaining to the code above.

The OFFlickrRequestDelegate methods are as follows:

- (void)flickrAPIRequest:(OFFlickrAPIRequest *)inRequest imageUploadSentBytes:(NSUInteger)inSentBytes totalBytes:(NSUInteger)inTotalBytes {
    NSLog(@"Success");
}

- (void)flickrAPIRequest:(OFFlickrAPIRequest *)inRequest didCompleteWithResponse:(NSDictionary *)inResponseDictionary {
    NSLog(@"%s %@ %@", __PRETTY_FUNCTION__, inRequest.sessionInfo, inResponseDictionary);
}

- (void)flickrAPIRequest:(OFFlickrAPIRequest *)inRequest didFailWithError:(NSError *)inError {
    NSLog(@"%s %@ %@", __PRETTY_FUNCTION__, inRequest.sessionInfo, inError);
    UIAlertView *alert = [[UIAlertView alloc] initWithTitle:@"Error" message:[inError description] delegate:nil cancelButtonTitle:@"OK" otherButtonTitles:nil, nil];
    [alert show];
}

When I run the project on the device the console shows:

Can upload photo
Success
Success
Success
Success
flickrAPIRequest:didFailWithError:(null) Error Domain=org.lukhnos.ObjectiveFlickr Code=2147418115 "The operation couldn’t be completed. (org.lukhnos.ObjectiveFlickr error 2147418115.)"

Searching through the API’s documentation, “error 2147418115” is defined as “OFFlickrAPIRequestFaultyXMLResponseError“. I’m not really sure what this means though. Also strange–“Success” appears four times when I’m only attempting to upload one photo.

The sample app utilizing ObjectiveFlickr, “Snap and Run” uploads photos fine on the same device that I am testing on. Comparing the code between my app and Snap and Run, I don’t see any major differences that could cause the photo not to upload.

Any help would be greatly appreciated.

Answer 1

That is strange. OFFlickrAPIRequestFaultyXMLResponseError means the returned data cannot be parsed as XML. If the sample app SnapAndRun runs correctly and yours don’t, I suggest add one line in ObjectiveFlickr.m, right after the line NSString *stat = [rsp objectForKey:@"stat"];:

NSString *dataString = [[[NSString alloc] initWithData:[request receivedData] encoding:NSUTF8StringEncoding] autorelease];
NSLog(@"received response: %@", dataString);

This may help you find out what goes wrong (e.g. if it’s a server-side issue, or some response format that the library missed).