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// Copyright 2017 Frédéric Guillot. All rights reserved.
// Use of this source code is governed by the Apache 2.0
// license that can be found in the LICENSE file.
package handler
import (
"encoding/json"
"errors"
"net/http"
"github.com/miniflux/miniflux/logger"
)
// JSONResponse handles JSON responses.
type JSONResponse struct {
writer http.ResponseWriter
request *http.Request
}
// Standard sends a JSON response with the status code 200.
func (j *JSONResponse) Standard(v interface{}) {
j.commonHeaders()
j.writer.WriteHeader(http.StatusOK)
j.writer.Write(j.toJSON(v))
}
// Created sends a JSON response with the status code 201.
func (j *JSONResponse) Created(v interface{}) {
j.commonHeaders()
j.writer.WriteHeader(http.StatusCreated)
j.writer.Write(j.toJSON(v))
}
// NoContent sends a JSON response with the status code 204.
func (j *JSONResponse) NoContent() {
j.commonHeaders()
j.writer.WriteHeader(http.StatusNoContent)
}
// BadRequest sends a JSON response with the status code 400.
func (j *JSONResponse) BadRequest(err error) {
logger.Error("[Bad Request] %v", err)
j.commonHeaders()
j.writer.WriteHeader(http.StatusBadRequest)
if err != nil {
j.writer.Write(j.encodeError(err))
}
}
// NotFound sends a JSON response with the status code 404.
func (j *JSONResponse) NotFound(err error) {
logger.Error("[Not Found] %v", err)
j.commonHeaders()
j.writer.WriteHeader(http.StatusNotFound)
j.writer.Write(j.encodeError(err))
}
// ServerError sends a JSON response with the status code 500.
func (j *JSONResponse) ServerError(err error) {
logger.Error("[Internal Server Error] %v", err)
j.commonHeaders()
j.writer.WriteHeader(http.StatusInternalServerError)
if err != nil {
j.writer.Write(j.encodeError(err))
}
}
// Forbidden sends a JSON response with the status code 403.
func (j *JSONResponse) Forbidden() {
logger.Info("[API:Forbidden]")
j.commonHeaders()
j.writer.WriteHeader(http.StatusForbidden)
j.writer.Write(j.encodeError(errors.New("Access Forbidden")))
}
func (j *JSONResponse) commonHeaders() {
j.writer.Header().Set("Accept", "application/json")
j.writer.Header().Set("Content-Type", "application/json; charset=utf-8")
}
func (j *JSONResponse) encodeError(err error) []byte {
type errorMsg struct {
ErrorMessage string `json:"error_message"`
}
tmp := errorMsg{ErrorMessage: err.Error()}
data, err := json.Marshal(tmp)
if err != nil {
logger.Error("encoding error: %v", err)
}
return data
}
func (j *JSONResponse) toJSON(v interface{}) []byte {
b, err := json.Marshal(v)
if err != nil {
logger.Error("encoding error: %v", err)
return []byte("")
}
return b
}
// NewJSONResponse returns a new JSONResponse.
func NewJSONResponse(w http.ResponseWriter, r *http.Request) *JSONResponse {
return &JSONResponse{request: r, writer: w}
}
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