anchor.diff:      print('$source, $nickname');
       var sourceFile = new File.fromUri(new Uri.file(source));
       print('$sourceFile');
  -    //Future<File> copyFuture = sourceFile.copy('../tmp/test.txt');
       
       var tmpDir = new Directory('tmp');
       tmpDir.createSync();
  
positive.code:       print(exception);
        return new FailResponse();
      }
      /*
      copiedFile.catchError((fail){
        return new FailResponse();
      });
      */    
      return new SuccessResponse();
    }
    
  
negative.code:     var nickname = req.url.queryParameters["nickname"];
      var source = req.url.queryParameters["source"];
      print('$source, $nickname');
      
  
      return new SuccessResponse();
    }
    
  