gistfile1.txt

NSMutableURLRequest *request = [httpClient multipartFormRequestWithMethod:@"POST" path:@"csv_files" parameters:nil constructingBodyWithBlock: ^(id <AFMultipartFormData>formData) {
        [formData appendPartWithFileData:data name:[NSString stringWithFormat:@"KegCop-users-%@.csv",idfv] fileName:[NSString stringWithFormat:@"KegCop-users-%@.csv",idfv] mimeType:@"text/csv"];
        
        AFHTTPRequestOperation *operation = [[AFHTTPRequestOperation alloc] initWithRequest:request];
    [operation setUploadProgressBlock:^(NSUInteger bytesWritten, long long totalBytesWritten, long long totalBytesExpectedToWrite) {
        NSLog(@"Sent %lld of %lld bytes", totalBytesWritten, totalBytesExpectedToWrite);
    }];
    [httpClient enqueueHTTPRequestOperation:operation];
    }];