/*
 *     Copyright 2022 The Dragonfly Authors
 *
 * Licensed 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 httpprotocol

import "github.com/go-http-utils/headers"

var PassThroughHeaders = map[string]struct{}{
	// TODO implement cache control in dragonfly, then enable the following header pass through
	// headers.CacheControl: {},
	// headers.ETag:         {},
	// headers.Expires:      {},
	// headers.LastModified: {},

	headers.Authorization:   {},
	headers.ContentType:     {},
	headers.ContentEncoding: {},
	headers.WWWAuthenticate: {},
}

func AddPassThroughHeader(header string) {
	PassThroughHeaders[header] = struct{}{}
}