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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 har
import (
"encoding/json"
"net/http"
"net/url"
"strconv"
"github.com/google/martian/v3/log"
)
type exportHandler struct {
logger *Logger
}
type resetHandler struct {
logger *Logger
}
// NewExportHandler returns an http.Handler for requesting HAR logs.
func NewExportHandler(l *Logger) http.Handler {
return &exportHandler{
logger: l,
}
}
// NewResetHandler returns an http.Handler for clearing in-memory log entries.
func NewResetHandler(l *Logger) http.Handler {
return &resetHandler{
logger: l,
}
}
// ServeHTTP writes the log in HAR format to the response body.
func (h *exportHandler) ServeHTTP(rw http.ResponseWriter, req *http.Request) {
if req.Method != "GET" {
rw.Header().Add("Allow", "GET")
rw.WriteHeader(http.StatusMethodNotAllowed)
log.Errorf("har.ServeHTTP: method not allowed: %s", req.Method)
return
}
log.Debugf("exportHandler.ServeHTTP: writing HAR logs to ResponseWriter")
rw.Header().Set("Content-Type", "application/json; charset=utf-8")
hl := h.logger.Export()
json.NewEncoder(rw).Encode(hl)
}
// ServeHTTP resets the log, which clears its entries.
func (h *resetHandler) ServeHTTP(rw http.ResponseWriter, req *http.Request) {
if !(req.Method == "POST" || req.Method == "DELETE") {
rw.Header().Add("Allow", "POST")
rw.Header().Add("Allow", "DELETE")
rw.WriteHeader(http.StatusMethodNotAllowed)
log.Errorf("har: method not allowed: %s", req.Method)
return
}
v, err := parseBoolQueryParam(req.URL.Query(), "return")
if err != nil {
log.Errorf("har: invalid value for return param: %s", err)
rw.WriteHeader(http.StatusBadRequest)
return
}
if v {
rw.Header().Set("Content-Type", "application/json; charset=utf-8")
hl := h.logger.ExportAndReset()
json.NewEncoder(rw).Encode(hl)
} else {
h.logger.Reset()
rw.WriteHeader(http.StatusNoContent)
}
log.Infof("resetHandler.ServeHTTP: HAR logs cleared")
}
func parseBoolQueryParam(params url.Values, name string) (bool, error) {
if params[name] == nil {
return false, nil
}
v, err := strconv.ParseBool(params.Get("return"))
if err != nil {
return false, err
}
return v, nil
}
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