Return an iterator over the body of the response.

def _body(self, full_path, environ, file_like):
        """Return an iterator over the body of the response."""
        magic = self._match_magic(full_path)
        if magic is not None:
            return [_encode(s, self.encoding) for s in magic.body(environ,
                                                                  file_like)]
        else:
            way_to_send = environ.get('wsgi.file_wrapper', iter_and_close)
            return way_to_send(file_like, self.block_size)