Multi-Part Upload to GAE For Images

gistfile1.m

UIImage* importedImage = [info valueForKey:UIImagePickerControllerOriginalImage];

AFHTTPRequestOperationManager *manager = [AFHTTPRequestOperationManager manager];
[manager GET:@"https://snap-picafy.appspot.com/upload_url" parameters:nil success:^(AFHTTPRequestOperation *operation, id responseObject) {
    NSLog(@"JSON: %@", responseObject);
    [manager POST:[responseObject valueForKey:@"uploadURL"] parameters:nil constructingBodyWithBlock:^(id<AFMultipartFormData> formData) {
        NSData* imageData = UIImagePNGRepresentation(importedImage);
        [formData appendPartWithFileData:imageData name:@"file" fileName:@"imageSample" mimeType:@"image/png"];
    } success:^(AFHTTPRequestOperation *operation, id responseObject) {
        NSLog(@"Response: %@", responseObject);
    } failure:^(AFHTTPRequestOperation *operation, NSError *error) {
        NSLog(@"Error: %@", error);
    }];
} failure:^(AFHTTPRequestOperation *operation, NSError *error) {
    NSLog(@"Error: %@", error);
}];