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verify_handlers.go
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/
verify_handlers.go
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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 verify
import (
"encoding/json"
"net/http"
"github.com/google/martian"
"github.com/google/martian/log"
)
// Handler is an http.Handler that returns the request and response
// verifications of reqv and resv as JSON.
type Handler struct {
reqv RequestVerifier
resv ResponseVerifier
}
// ResetHandler is an http.Handler that resets the request and response
// verifications of reqv and resv.
type ResetHandler struct {
reqv RequestVerifier
resv ResponseVerifier
}
type verifyResponse struct {
Errors []verifyError `json:"errors"`
}
type verifyError struct {
Message string `json:"message"`
}
// NewHandler returns an http.Handler for requesting the verification
// error status.
func NewHandler() *Handler {
return &Handler{}
}
// NewResetHandler returns an http.Handler for reseting the verification error
// status.
func NewResetHandler() *ResetHandler {
return &ResetHandler{}
}
// SetRequestVerifier sets the RequestVerifier to verify.
func (h *Handler) SetRequestVerifier(reqv RequestVerifier) {
h.reqv = reqv
}
// SetResponseVerifier sets the ResponseVerifier to verify.
func (h *Handler) SetResponseVerifier(resv ResponseVerifier) {
h.resv = resv
}
// ServeHTTP writes out a JSON response containing a list of verification
// errors that occurred during the requests and responses sent to the proxy.
func (h *Handler) ServeHTTP(rw http.ResponseWriter, req *http.Request) {
rw.Header().Set("Content-Type", "application/json")
if req.Method != "GET" {
rw.Header().Set("Allow", "GET")
rw.WriteHeader(405)
log.Errorf("verify: invalid request method: %s", req.Method)
return
}
vres := &verifyResponse{
Errors: make([]verifyError, 0),
}
if h.reqv != nil {
if err := h.reqv.VerifyRequests(); err != nil {
appendError(vres, err)
}
}
if h.resv != nil {
if err := h.resv.VerifyResponses(); err != nil {
appendError(vres, err)
}
}
json.NewEncoder(rw).Encode(vres)
}
func appendError(vres *verifyResponse, err error) {
merr, ok := err.(*martian.MultiError)
if !ok {
vres.Errors = append(vres.Errors, verifyError{Message: err.Error()})
return
}
for _, err := range merr.Errors() {
vres.Errors = append(vres.Errors, verifyError{Message: err.Error()})
}
}
// SetRequestVerifier sets the RequestVerifier to reset.
func (h *ResetHandler) SetRequestVerifier(reqv RequestVerifier) {
h.reqv = reqv
}
// SetResponseVerifier sets the ResponseVerifier to reset.
func (h *ResetHandler) SetResponseVerifier(resv ResponseVerifier) {
h.resv = resv
}
// ServeHTTP resets the verifier for the given ID so that it may
// be run again.
func (h *ResetHandler) ServeHTTP(rw http.ResponseWriter, req *http.Request) {
if req.Method != "POST" {
rw.Header().Set("Allow", "POST")
rw.WriteHeader(405)
log.Errorf("verify: invalid request method: %s", req.Method)
return
}
if h.reqv != nil {
h.reqv.ResetRequestVerifications()
}
if h.resv != nil {
h.resv.ResetResponseVerifications()
}
rw.WriteHeader(204)
}