responses.py 文件源码

def _on_request(self, request, **kwargs):
        match = self._find_match(request)

        # TODO(dcramer): find the correct class for this
        if match is None:
            error_msg = 'Connection refused: {0}'.format(request.url)
            response = ConnectionError(error_msg)

            self._calls.add(request, response)
            raise response

        headers = {
            'Content-Type': match['content_type'],
        }
        if match['adding_headers']:
            headers.update(match['adding_headers'])

        response = HTTPResponse(
            status=match['status'],
            body=BufferIO(match['body']),
            headers=headers,
            preload_content=False,
        )

        adapter = HTTPAdapter()

        response = adapter.build_response(request, response)
        if not match['stream']:
            response.content  # NOQA

        self._calls.add(request, response)

        return response