Method serialize_to_request

awscli/botocore/serialize.py:735–793

(self, parameters, operation_model)

    KNOWN_LOCATIONS = ['uri', 'querystring', 'header', 'headers']

    def serialize_to_request(self, parameters, operation_model):
        serialized = self._create_default_request()
        serialized['method'] = operation_model.http.get(
            'method', self.DEFAULT_METHOD
        )
        shape = operation_model.input_shape

        host_prefix = self._expand_host_prefix(parameters, operation_model)
        if host_prefix is not None:
            serialized['host_prefix'] = host_prefix

        if shape is None:
            serialized['url_path'] = operation_model.http['requestUri']
            return serialized
        shape_members = shape.members
        # While the ``serialized`` key holds the final serialized request
        # data, we need interim dicts for the various locations of the
        # request.  We need this for the uri_path_kwargs and the
        # query_string_kwargs because they are templated, so we need
        # to gather all the needed data for the string template,
        # then we render the template.  The body_kwargs is needed
        # because once we've collected them all, we run them through
        # _serialize_body_params, which for rest-json, creates JSON,
        # and for rest-xml, will create XML.  This is what the
        # ``partitioned`` dict below is for.
        partitioned = {
            'uri_path_kwargs': self.MAP_TYPE(),
            'query_string_kwargs': self.MAP_TYPE(),
            'body_kwargs': self.MAP_TYPE(),
            'headers': self.MAP_TYPE(),
        }
        for param_name, param_value in parameters.items():
            if param_value is None:
                # Don't serialize any parameter with a None value.
                continue
            self._partition_parameters(
                partitioned, param_name, param_value, shape_members
            )
        serialized['url_path'] = self._render_uri_template(
            operation_model.http['requestUri'], partitioned['uri_path_kwargs']
        )

        if 'authPath' in operation_model.http:
            serialized['auth_path'] = self._render_uri_template(
                operation_model.http['authPath'],
                partitioned['uri_path_kwargs'],
            )
        # Note that we lean on the http implementation to handle the case
        # where the requestUri path already has query parameters.
        # The bundled http client, requests, already supports this.
        serialized['query_string'] = partitioned['query_string_kwargs']
        if partitioned['headers']:
            serialized['headers'] = partitioned['headers']
        self._serialize_payload(
            partitioned, parameters, serialized, shape, shape_members
        )
        self._serialize_content_type(serialized, shape, shape_members)