Fetch gzip format response

@try {

        NSURL *url = [NSURL URLWithString:strURL];

        

        NSMutableURLRequest *request = [NSMutableURLRequest requestWithURL:url

                                                               cachePolicy:NSURLRequestReloadIgnoringLocalCacheData  timeoutInterval:180.0];

        

        [request setHTTPMethod:@"POST"];

        [request setValue:@"application/json" forHTTPHeaderField:@"Content-Type"];

        

        //Set GZIP format

        [request setValue:@"gzip" forHTTPHeaderField:@"Accept-Encoding"];

        

        //Set Authorization request

        if([basicAuthRequired caseInsensitiveCompare:@"Yes"] ==  NSOrderedSame) {

            

            NSString *authStr = [NSString stringWithFormat:@"%@:%@", username, password];

            NSData *authData = [authStr dataUsingEncoding:NSASCIIStringEncoding];

            NSString *authValue = [NSString stringWithFormat:@"Basic %@", [authData base64EncodingWithLineLength:80]];

            

            [request setValue:authValue forHTTPHeaderField:@"Authorization"];

        }

        

        NSURLResponse *response = NULL;

        NSError *requestError = NULL;

        

        //NSURLConnection will automatically decode gzipped response

        NSData *responseData = [NSURLConnection sendSynchronousRequest:request returningResponse:&response

                                                                 error:&requestError];

        

        NSError *errorSuccess=nil;

        

        NSMutableDictionary  *dictionary = [[NSMutableDictionary alloc]

                                            initWithDictionary:[NSJSONSerialization JSONObjectWithData:responseData options:kNilOptions error:&errorSuccess]];

        

        if (errorSuccess) { //Handle error if dictionary failed to generate

            [self showSecureServiceAlert];

        }

        

        return dictionary;

    }

    @catch (NSException *exception) {

        // Handle exception

        NSLog(@"Exception in fetchURLContent function");

    }