pointer: Option<u64>,
    metaprotocol: Option<String>,
    metadata: Option<Vec<u8>>,
    compress: bool,
  ) -> Result<Self, Error> {
    let path = path.as_ref();

    let body = fs::read(path).with_context(|| format!("io error reading {}", path.display()))?;

    let (content_type, compression_mode) = Media::content_type_for_path(path)?;

    let (body, content_encoding) = if compress {
      let mut compressed = Vec::new();

      {
        CompressorWriter::with_params(
          &mut compressed,
          body.len(),
          &BrotliEncoderParams {
            lgblock: 24,
            lgwin: 24,
            mode: compression_mode,
            quality: 11,
            size_hint: body.len(),
            ..Default::default()
          },
        )
        .write_all(&body)?;

        let mut decompressor = brotli::Decompressor::new(compressed.as_slice(), compressed.len());

        let mut decompressed = Vec::new();

        decompressor.read_to_end(&mut decompressed)?;

        ensure!(decompressed == body, "decompression roundtrip failed");