|
- // Copyright 2015 Google Inc. All rights reserved.
- //
- // 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 header
-
- import (
- "encoding/json"
- "net/http"
-
- "github.com/google/martian"
- "github.com/google/martian/log"
- "github.com/google/martian/parse"
- "github.com/google/martian/proxyutil"
- )
-
- func init() {
- parse.Register("header.Copy", copyModifierFromJSON)
- }
-
- type copyModifier struct {
- from, to string
- }
-
- type copyModifierJSON struct {
- From string `json:"from"`
- To string `json:"to"`
- Scope []parse.ModifierType `json:"scope"`
- }
-
- // ModifyRequest copies the header in from to the request header for to.
- func (m *copyModifier) ModifyRequest(req *http.Request) error {
- log.Debugf("header: copyModifier.ModifyRequest %s, from: %s, to: %s", req.URL, m.from, m.to)
- h := proxyutil.RequestHeader(req)
-
- return h.Set(m.to, h.Get(m.from))
- }
-
- // ModifyResponse copies the header in from to the response header for to.
- func (m *copyModifier) ModifyResponse(res *http.Response) error {
- log.Debugf("header: copyModifier.ModifyResponse %s, from: %s, to: %s", res.Request.URL, m.from, m.to)
- h := proxyutil.ResponseHeader(res)
-
- return h.Set(m.to, h.Get(m.from))
- }
-
- // NewCopyModifier returns a modifier that will copy the header in from to the
- // header in to.
- func NewCopyModifier(from, to string) martian.RequestResponseModifier {
- return ©Modifier{
- from: from,
- to: to,
- }
- }
-
- // copyModifierFromJSON builds a copy modifier from JSON.
- //
- // Example JSON:
- // {
- // "header.Copy": {
- // "scope": ["request", "response"],
- // "from": "Original-Header",
- // "to": "Copy-Header"
- // }
- // }
- func copyModifierFromJSON(b []byte) (*parse.Result, error) {
- msg := ©ModifierJSON{}
- if err := json.Unmarshal(b, msg); err != nil {
- return nil, err
- }
-
- return parse.NewResult(NewCopyModifier(msg.From, msg.To), msg.Scope)
- }
|