wide/util/ret.go

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// Copyright (c) 2014-2019, b3log.org & hacpai.com
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//
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// 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
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//
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// https://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
// 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.
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package util
import (
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"compress/gzip"
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"encoding/json"
"net/http"
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"os"
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"github.com/b3log/wide/log"
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)
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// Logger.
var retLogger = log.NewLogger(os.Stdout)
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// Result.
type Result struct {
Succ bool `json:"succ"` // successful or not
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Code int `json:"code"` // return code
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Msg string `json:"msg"` // message
Data interface{} `json:"data"` // data object
}
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// NewResult creates a result with Succ=true, Code=0, Msg="", Data=nil.
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func NewResult() *Result {
return &Result{
Succ: true,
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Code: 0,
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Msg: "",
Data: nil,
}
}
// RetResult writes HTTP response with "Content-Type, application/json".
func RetResult(w http.ResponseWriter, r *http.Request, res *Result) {
w.Header().Set("Content-Type", "application/json")
data, err := json.Marshal(res)
if err != nil {
retLogger.Error(err)
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return
}
w.Write(data)
}
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// RetGzResult writes HTTP response with "Content-Type, application/json" and "Content-Encoding, gzip".
func RetGzResult(w http.ResponseWriter, r *http.Request, res *Result) {
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
}
}
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// RetJSON writes HTTP response with "Content-Type, application/json".
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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 {
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retLogger.Error(err)
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return
}
w.Write(data)
}
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// RetGzJSON writes HTTP response with "Content-Type, application/json" and "Content-Encoding, gzip".
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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 {
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retLogger.Error(err)
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return
}
err = gz.Close()
if nil != err {
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retLogger.Error(err)
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return
}
}