pub fn open(file: BitString) -> Result(FileDescriptor, Atom)

pub external fn sendfile(
  file_descriptor: FileDescriptor,
  socket: Socket,
  offset: Int,
  bytes: Int,
  options: List(a),
) -> Result(Int, Atom)

pub external fn size(path: BitString) -> Int

pub external fn uri_unquote(uri: String) -> String