pkg/xds/envoy/routes/v3/tags_header_configurer.go

/*
 * Licensed to the Apache Software Foundation (ASF) under one or more
 * contributor license agreements.  See the NOTICE file distributed with
 * this work for additional information regarding copyright ownership.
 * The ASF licenses this file to You under the Apache License, Version 2.0
 * (the "License"); you may not use this file except in compliance with
 * the License.  You may obtain a copy of the License at
 *
 *     http://www.apache.org/licenses/LICENSE-2.0
 *
 * Unless required by applicable law or agreed to in writing, software
 * distributed under the License is distributed on an "AS IS" BASIS,
 * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
 * See the License for the specific language governing permissions and
 * limitations under the License.
 */

package v3

import (
	envoy_config_core_v3 "github.com/envoyproxy/go-control-plane/envoy/config/core/v3"
	envoy_config_route_v3 "github.com/envoyproxy/go-control-plane/envoy/config/route/v3"
)

import (
	mesh_proto "github.com/apache/dubbo-kubernetes/api/mesh/v1alpha1"
	"github.com/apache/dubbo-kubernetes/pkg/xds/envoy/tags"
)

type TagsHeaderConfigurer struct {
	Tags mesh_proto.MultiValueTagSet
}

func (t *TagsHeaderConfigurer) Configure(rc *envoy_config_route_v3.RouteConfiguration) error {
	if len(t.Tags) == 0 {
		return nil
	}
	rc.RequestHeadersToAdd = append(rc.RequestHeadersToAdd, &envoy_config_core_v3.HeaderValueOption{
		Header: &envoy_config_core_v3.HeaderValue{Key: tags.TagsHeaderName, Value: tags.Serialize(t.Tags)},
	})
	return nil
}