obj-c AFNetworking 2.0 POST request does not work

Question

Hi want to send some data (strings and a file) to a server, by using AFNetworking 2.0. Somehow the data for the POST request (for a forumlar) ist not correct, it looks like

Answer 1

I have been looking for good answer for this one hell of a problem more than 10 hours and finally get hold of something what would work! according to Apple Doc

NSURLErrorRequestBodyStreamExhausted (-1021) Returned when a body stream is needed but the client does not provide one. This impacts clients on iOS that send a POST request using a body stream but do not implement the NSURLConnection delegate method connection:needNewBodyStream.

so what I had to do is subclass AFHTTPRequestOperation and implement all the delegate methods for NSURLConnection //.h

    @interface CGHTTPRequestOperation : AFHTTPRequestOperation

    @end

//.m

    @implementation CGHTTPRequestOperation

    #pragma mark NSURLConnection delegate methods

    - (NSInputStream *)connection:(NSURLConnection __unused *)connection needNewBodyStream:(NSURLRequest *)request {

        if ([request.HTTPBodyStream conformsToProtocol:@protocol(NSCopying)]) {

            return [request.HTTPBodyStream copy];

        }

        return nil;

    }

    - (void)connection:(NSURLConnection *)connection didReceiveResponse:(NSURLResponse *)response {
        [super connection:connection didReceiveResponse:response];
    }

    - (void)connection:(NSURLConnection *)connection didReceiveData:(NSData *)data {
        [super connection:connection didReceiveData:data];
    }

    - (void)connection:(NSURLConnection *)connection didSendBodyData:(NSInteger)bytesWritten totalBytesWritten:(NSInteger)totalBytesWritten totalBytesExpectedToWrite:(NSInteger)totalBytesExpectedToWrite {
        [super connection:connection didSendBodyData:bytesWritten totalBytesWritten:totalBytesWritten totalBytesExpectedToWrite:totalBytesExpectedToWrite];
    }

    - (NSCachedURLResponse *)connection:(NSURLConnection *)connection willCacheResponse:(NSCachedURLResponse *)cachedResponse{
        return [super connection:connection willCacheResponse:cachedResponse];
    }

    - (void)connectionDidFinishLoading:(NSURLConnection *)connection{
        [super connectionDidFinishLoading:connection];
    }

    - (void) connection:(NSURLConnection *)connection didFailWithError:(NSError *)error {
        [super connection:connection didFailWithError:error];
    }

    - (BOOL)connectionShouldUseCredentialStorage:(NSURLConnection *)connection {
        return YES;
    }
    - (void)connection:(NSURLConnection *)connection willSendRequestForAuthenticationChallenge:(NSURLAuthenticationChallenge *)challenge {
        [super connection:connection willSendRequestForAuthenticationChallenge:challenge];
    }

    @end

If you wonder how to use this extended classes in regards to upload the multi-part image data here is the example //.h

    typedef enum {

        CGFileUploadStatusError = 0,
        CGFileUploadStatusSuccess = 1,

    } CGFileUploadStatus;

    typedef void(^CGNetworkingFileUploadCBlock) (CGFileUploadStatus status,NSString *responseString);

//.m

    + (void) uploadImageAtPath:(NSString *) imagePath cBlock:(CGNetworkingFileUploadCBlock) cBlock {

        AFHTTPRequestSerializer *r = [AFHTTPRequestSerializer serializer];

        NSDictionary *param = @{@"param1":@"",@"param2":@""};
        NSData *d = [NSData dataWithContentsOfFile:imagePath];

        __block NSString *paramNameForImage = [imagePath pathComponents].lastObject;

        NSError *error = nil;
        NSMutableURLRequest *urlRequest = [r multipartFormRequestWithMethod:@"POST" URLString:@"http://url_to_up_load_image" parameters:param constructingBodyWithBlock:^(id formData) {

                [formData appendPartWithFileData:d name:@"FileUploadControl" fileName:paramNameForImage mimeType:@"image/jpeg"];

            } error:&error];

            if (error) {

                NSLog(@"Some error:%@",error);

            }



        CGHTTPRequestOperation *requestOperation = [[CGHTTPRequestOperation alloc] initWithRequest:urlRequest];


        //[requestOperation setCredential:nil]; //set cred here
        //[requestOperation setSecurityPolicy:nil]; //set security policy here if you are using one

        [requestOperation setResponseSerializer:[AFHTTPResponseSerializer serializer]];

        [requestOperation setCompletionBlockWithSuccess:^(AFHTTPRequestOperation *operation, id responseObject) {

            NSLog(@"Success: %@ ***** %@", operation.responseString, operation.response.allHeaderFields);
            cBlock(CGFileUploadStatusSuccess,operation.responseString);

        } failure:^(AFHTTPRequestOperation *operation, NSError *error) {

            NSLog(@"Error: %@ ***** %@", operation, error);
            cBlock(CGFileUploadStatusError,operation.responseString);

        }];


        [requestOperation setUploadProgressBlock:^(NSUInteger bytesWritten, long long totalBytesWritten, long long totalBytesExpectedToWrite) {


        }];


        [requestOperation start];
        [requestOperation waitUntilFinished];

    }

Hope this helps those who is suffering this problem :)