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response.go
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response.go
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package gor
import (
"encoding/json"
"fmt"
"net/http"
"reflect"
"github.com/unrolled/render"
)
// Res is http ResponseWriter and some gor Response method
type Res struct {
w http.ResponseWriter
exit bool
render *render.Render
Response interface{}
StatusCode int
}
func httpResponseWriterToRes(httpResponseWriter http.ResponseWriter, g *Gor) *Res {
return &Res{
httpResponseWriter,
false,
render.New(render.Options{Directory: g.renderDir}),
nil,
200,
}
}
func (res *Res) Write(data []byte) (int, error) {
res.exit = true
res.Response = string(data)
res.w.WriteHeader(res.StatusCode)
return res.w.Write(data)
}
// Status set Response http status code
func (res *Res) Status(code int) *Res {
res.StatusCode = code
if http.StatusText(code) == "" {
res.Status(http.StatusInternalServerError).Send(ErrHTTPStatusCodeInvalid)
}
return res
}
// SendStatus set Response http status code with its text
func (res *Res) SendStatus(code int) {
if res.exit {
return
}
res.Status(code).Send(http.StatusText(code))
}
// Send Send a Response
func (res *Res) Send(v interface{}) {
if res.exit {
return
}
res.Write([]byte(fmt.Sprintf("%v", v)))
res.exit = true
}
// JSON Send json Response
func (res *Res) JSON(v interface{}) {
defer func() {
res.exit = true
}()
if res.exit {
return
}
if v == nil {
res.w.Header().Set("Content-Type", "application/json")
res.Write([]byte("null"))
return
}
t := reflect.TypeOf(v)
switch t.Kind() {
case reflect.Map, reflect.Struct, reflect.Slice, reflect.Array:
break
default:
res.Status(http.StatusInternalServerError).Send(fmt.Sprintf("[%s] [%s] %+v", ErrResponseTypeUnsupported, t.Kind().String(), v))
return
}
b, err := json.Marshal(v)
if err != nil {
res.Status(http.StatusInternalServerError).Send(ErrJSONMarshal)
return
}
res.w.Header().Set("Content-Type", "application/json")
res.Write(b)
}
// HTML render HTML
func (res *Res) HTML(v string, data interface{}) {
if err := res.render.HTML(res, res.StatusCode, v, data); err != nil {
res.Error(err.Error())
return
}
res.exit = true
}
// Redirect Redirect to another url
func (res *Res) Redirect(path string) {
res.w.Header().Set("Location", path)
res.Status(http.StatusFound).Write([]byte(fmt.Sprintf(`%s. Redirecting to %s`, http.StatusText(http.StatusFound), path)))
}
// AddHeader append (key, val) to headers
func (res *Res) AddHeader(key, val string) {
res.w.Header().Add(key, val)
}
// SetCookie set cookie
func (res *Res) SetCookie(key, val string, option ...Cookie) {
var cookie *http.Cookie
if len(option) > 1 {
res.Error("only support one cookie option")
} else if len(option) == 1 {
cookie = option[0].toHTTPCookie(key, val)
} else {
cookie = &http.Cookie{
Name: key,
Value: val,
}
}
http.SetCookie(res.w, cookie)
}
// Error send erroe Response
func (res *Res) Error(v string) {
res.Status(http.StatusInternalServerError).Send(v)
}
// End end the request
func (res *Res) End() {
res.exit = true
}