wide/util/ret.go

// Copyright (c) 2014-2015, b3log.org
//
// 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 util

import (
	"compress/gzip"
	"encoding/json"
	"net/http"
	"os"

	"github.com/b3log/wide/log"
)

// Logger.
var retLogger = log.NewLogger(os.Stdout)

// RetJSON writes HTTP response with "Content-Type, application/json".
func RetJSON(w http.ResponseWriter, r *http.Request, res map[string]interface{}) {
	w.Header().Set("Content-Type", "application/json")

	data, err := json.Marshal(res)
	if err != nil {
		retLogger.Error(err)
		return
	}

	w.Write(data)
}

// RetGzJSON writes HTTP response with "Content-Type, application/json".
func RetGzJSON(w http.ResponseWriter, r *http.Request, res map[string]interface{}) {
	w.Header().Set("Content-Type", "application/json")
	w.Header().Set("Content-Encoding", "gzip")

	gz := gzip.NewWriter(w)
	err := json.NewEncoder(gz).Encode(res)
	if nil != err {
		retLogger.Error(err)
		return
	}

	err = gz.Close()
	if nil != err {
		retLogger.Error(err)

		return
	}
}