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// 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 cookie allows for the modification of cookies on http requests and responses.
package cookie
import (
"encoding/json"
"net/http"
"time"
"github.com/google/martian/v3"
"github.com/google/martian/v3/log"
"github.com/google/martian/v3/parse"
)
func init() {
parse.Register("cookie.Modifier", modifierFromJSON)
}
type modifier struct {
cookie *http.Cookie
}
type modifierJSON struct {
Name string `json:"name"`
Value string `json:"value"`
Path string `json:"path"`
Domain string `json:"domain"`
Expires time.Time `json:"expires"`
Secure bool `json:"secure"`
HTTPOnly bool `json:"httpOnly"`
MaxAge int `json:"maxAge"`
Scope []parse.ModifierType `json:"scope"`
}
// ModifyRequest adds cookie to the request.
func (m *modifier) ModifyRequest(req *http.Request) error {
req.AddCookie(m.cookie)
log.Debugf("cookie.ModifyRequest: %s: cookie: %s", req.URL, m.cookie)
return nil
}
// ModifyResponse sets cookie on the response.
func (m *modifier) ModifyResponse(res *http.Response) error {
res.Header.Add("Set-Cookie", m.cookie.String())
log.Debugf("cookie.ModifyResponse: %s: cookie: %s", res.Request.URL, m.cookie)
return nil
}
// NewModifier returns a modifier that injects the provided cookie into the
// request or response.
func NewModifier(cookie *http.Cookie) martian.RequestResponseModifier {
return &modifier{
cookie: cookie,
}
}
// modifierFromJSON takes a JSON message as a byte slice and returns a
// CookieModifier and an error.
//
// Example JSON Configuration message:
// {
// "name": "Martian-Cookie",
// "value": "some value",
// "path": "/some/path",
// "domain": "example.com",
// "expires": "2025-04-12T23:20:50.52Z", // RFC 3339
// "secure": true,
// "httpOnly": false,
// "maxAge": 86400,
// "scope": ["request", "result"]
// }
func modifierFromJSON(b []byte) (*parse.Result, error) {
msg := &modifierJSON{}
if err := json.Unmarshal(b, msg); err != nil {
return nil, err
}
c := &http.Cookie{
Name: msg.Name,
Value: msg.Value,
Path: msg.Path,
Domain: msg.Domain,
Expires: msg.Expires,
Secure: msg.Secure,
HttpOnly: msg.HTTPOnly,
MaxAge: msg.MaxAge,
}
return parse.NewResult(NewModifier(c), msg.Scope)
}
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