common/api.go

// Copyright 2017 Google Inc.
//
// 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 common

import (
	"encoding/json"
	"net/http"
	"strconv"
)

func WriteError(w http.ResponseWriter, reason string, errorCode int, statusCode int) {
	w.WriteHeader(statusCode)
	resp := ErrorResponse{
		ResponseCode:    strconv.Itoa(errorCode),
		ResponseMessage: reason,
		StatusCode:      statusCode,
	}
	bytes, err := json.Marshal(resp)
	if err != nil {
		w.Write([]byte("unable to marshal errorResponse: " + err.Error()))
	} else {
		w.Write(bytes)
	}
}