Method send_informational

gunicorn/http2/connection.py:359–389

Send an informational response (1xx) on a stream. This is used for 103 Early Hints and other 1xx responses. Informational responses are sent before the final response and do not end the stream. Args: stream_id: The stream ID status: HTTP stat

(self, stream_id, status, headers)

            )

    def send_informational(self, stream_id, status, headers):
        """Send an informational response (1xx) on a stream.

        This is used for 103 Early Hints and other 1xx responses.
        Informational responses are sent before the final response
        and do not end the stream.

        Args:
            stream_id: The stream ID
            status: HTTP status code (100-199)
            headers: List of (name, value) header tuples

        Raises:
            HTTP2Error: If status is not in 1xx range
        """
        if status < 100 or status >= 200:
            raise HTTP2Error(f"Invalid informational status: {status}")

        stream = self.streams.get(stream_id)
        if stream is None:
            raise HTTP2Error(f"Stream {stream_id} not found")

        # Build headers with :status pseudo-header
        response_headers = [(':status', str(status))]
        for name, value in headers:
            # HTTP/2 headers must be lowercase
            response_headers.append((name.lower(), str(value)))

        # Send headers with end_stream=False (informational, more to follow)
        self.h2_conn.send_headers(stream_id, response_headers, end_stream=False)
        self._send_pending_data()

    def send_response(self, stream_id, status, headers, body=None):
        """Send a response on a stream.