wsgi.py 文件源码

def start_response(self, status, headers, exc_info=None):
        if exc_info:
            try:
                if self.status:
                    raise exc_info[1]
            finally:
                exc_info = None

        status_code = int(status.split(' ', 1)[0])

        self.status = status
        resp = self.response = aiohttp.Response(
            self.writer, status_code,
            self.message.version, self.message.should_close)
        resp.HOP_HEADERS = self.HOP_HEADERS
        for name, value in headers:
            resp.add_header(name, value)

        if resp.has_chunked_hdr:
            resp.enable_chunked_encoding()

        # send headers immediately for websocket connection
        if status_code == 101 and resp.upgrade and resp.websocket:
            resp.send_headers()
        else:
            resp._send_headers = True
        return self.response.write