The request body data.

async def get_data(self, raw: bool=True) -> AnyStr:
        """The request body data."""
        try:
            body_future = asyncio.ensure_future(self.body)
            raw_data = await asyncio.wait_for(body_future, timeout=self.body_timeout)
        except asyncio.TimeoutError:
            body_future.cancel()
            from ..exceptions import RequestTimeout  # noqa Avoiding circular import
            raise RequestTimeout()

        if raw:
            return raw_data
        else:
            return raw_data.decode(self.charset)