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73 lines
1.9 KiB
Go
73 lines
1.9 KiB
Go
// Copyright 2015 Google Inc. All rights reserved.
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//
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// Licensed under the Apache License, Version 2.0 (the "License");
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// you may not use this file except in compliance with the License.
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// You may obtain a copy of the License at
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//
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// http://www.apache.org/licenses/LICENSE-2.0
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//
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// Unless required by applicable law or agreed to in writing, software
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// distributed under the License is distributed on an "AS IS" BASIS,
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// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
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// See the License for the specific language governing permissions and
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// limitations under the License.
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// Package status contains a modifier to rewrite the status code on a response.
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package status
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import (
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"encoding/json"
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"fmt"
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"net/http"
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"github.com/google/martian"
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"github.com/google/martian/parse"
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)
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type statusModifier struct {
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statusCode int
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}
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type statusJSON struct {
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StatusCode int `json:"statusCode"`
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Scope []parse.ModifierType `json:"scope"`
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}
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func init() {
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parse.Register("status.Modifier", modifierFromJSON)
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}
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// ModifyResponse overwrites the status text and code on an HTTP response and
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// returns nil.
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func (s *statusModifier) ModifyResponse(res *http.Response) error {
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res.StatusCode = s.statusCode
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res.Status = fmt.Sprintf("%d %s", s.statusCode, http.StatusText(s.statusCode))
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return nil
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}
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// NewModifier constructs a statusModifier that overrides response status
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// codes with the HTTP status code provided.
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func NewModifier(statusCode int) martian.ResponseModifier {
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return &statusModifier{
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statusCode: statusCode,
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}
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}
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// modifierFromJSON builds a status.Modifier from JSON.
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//
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// Example JSON:
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// {
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// "status.Modifier": {
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// "scope": ["response"],
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// "statusCode": 401
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// }
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// }
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func modifierFromJSON(b []byte) (*parse.Result, error) {
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msg := &statusJSON{}
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if err := json.Unmarshal(b, msg); err != nil {
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return nil, err
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}
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return parse.NewResult(NewModifier(msg.StatusCode), msg.Scope)
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}
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