original_string: protected function validateFile($path)
      {
          if (strpos($path, '../') !== false || strpos($path, '..\\') !== false) {
              throw new NotFoundException(__d('cake', 'The requested file contains `..` and will not be read.'));
          }
          if (!is_file($path)) {
              deprecationWarning(
                  'Automatic prefixing of paths with `APP` by `Response::file()` and `withFile()` is deprecated. ' .
                  'Use absolute paths instead.'
              );
              $path = APP . $path;
          }
          if (!Folder::isAbsolute($path)) {
              deprecationWarning(
                  'Serving files via `file()` or `withFile()` using relative paths is deprecated.' .
                  'Use an absolute path instead.'
              );
          }
  
          $file = new File($path);
          if (!$file->exists() || !$file->readable()) {
              if (Configure::read('debug')) {
                  throw new NotFoundException(sprintf('The requested file %s was not found or not readable', $path));
              }
              throw new NotFoundException(__d('cake', 'The requested file was not found'));
          }
  
          return $file;
      }
code: protected function validateFile($path)
      {
          if (strpos($path, '../') !== false || strpos($path, '..\\') !== false) {
              throw new NotFoundException(__d('cake', 'The requested file contains `..` and will not be read.'));
          }
          if (!is_file($path)) {
              deprecationWarning(
                  'Automatic prefixing of paths with `APP` by `Response::file()` and `withFile()` is deprecated. ' .
                  'Use absolute paths instead.'
              );
              $path = APP . $path;
          }
          if (!Folder::isAbsolute($path)) {
              deprecationWarning(
                  'Serving files via `file()` or `withFile()` using relative paths is deprecated.' .
                  'Use an absolute path instead.'
              );
          }
  
          $file = new File($path);
          if (!$file->exists() || !$file->readable()) {
              if (Configure::read('debug')) {
                  throw new NotFoundException(sprintf('The requested file %s was not found or not readable', $path));
              }
              throw new NotFoundException(__d('cake', 'The requested file was not found'));
          }
  
          return $file;
      }
code_tokens: protected function validateFile ( $ path ) { if ( strpos ( $ path , '../' ) !== false || strpos ( $ path , '..\\' ) !== false ) { throw new NotFoundException ( __d ( 'cake' , 'The requested file contains `..` and will not be read.' ) ) ; } if ( ! is_file ( $ path ) ) { deprecationWarning ( 'Automatic prefixing of paths with `APP` by `Response::file()` and `withFile()` is deprecated. ' . 'Use absolute paths instead.' ) ; $ path = APP . $ path ; } if ( ! Folder :: isAbsolute ( $ path ) ) { deprecationWarning ( 'Serving files via `file()` or `withFile()` using relative paths is deprecated.' . 'Use an absolute path instead.' ) ; } $ file = new File ( $ path ) ; if ( ! $ file -> exists ( ) || ! $ file -> readable ( ) ) { if ( Configure :: read ( 'debug' ) ) { throw new NotFoundException ( sprintf ( 'The requested file %s was not found or not readable' , $ path ) ) ; } throw new NotFoundException ( __d ( 'cake' , 'The requested file was not found' ) ) ; } return $ file ; }
docstring: Validate a file path is a valid response body.
  
  @param string $path The path to the file.
  @throws \Cake\Http\Exception\NotFoundException
  @return \Cake\Filesystem\File
docstring_tokens: Validate a file path is a valid response body .