code: func (*FileURLReader) Read(url *url.URL) (io.ReadCloser, error) {
  	// for some reason url.Host may contain information about the ./ or ../ when
  	// specifying relative path, thus using that value as well
  	return os.Open(filepath.Join(url.Host, url.Path))
  }
docs: // Read produces an io.Reader from a file URL