gistfile1.txt

          // only add the http link
          NSError *error = nil;
          NSRegularExpression *regex = [NSRegularExpression regularExpressionWithPattern:@"(http[^^]+)" options:NSRegularExpressionCaseInsensitive error:&error];
          NSTextCheckingResult *firstMatch = [regex firstMatchInString:responseString options:0 range:NSMakeRange(0, [responseString length])];
          if (firstMatch) {
            NSRange accessTokenRange = [firstMatch rangeAtIndex:1];
            NSString *theUrlString = [responseString substringWithRange:accessTokenRange];
            NSLog(theUrlString);
          }