A fork of Gitea (see branch `mj`) adding Majority Judgment Polls 𐄷 over Issues and Merge Requests. https://git.mieuxvoter.fr
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package render
import (
"bytes"
"encoding/json"
"encoding/xml"
"html/template"
"io"
"net/http"
)
// Engine is the generic interface for all responses.
type Engine interface {
Render(io.Writer, interface{}) error
}
// Head defines the basic ContentType and Status fields.
type Head struct {
ContentType string
Status int
}
// Data built-in renderer.
type Data struct {
Head
}
// HTML built-in renderer.
type HTML struct {
Head
Name string
Templates *template.Template
bp GenericBufferPool
}
// JSON built-in renderer.
type JSON struct {
Head
Indent bool
UnEscapeHTML bool
Prefix []byte
StreamingJSON bool
}
// JSONP built-in renderer.
type JSONP struct {
Head
Indent bool
Callback string
}
// Text built-in renderer.
type Text struct {
Head
}
// XML built-in renderer.
type XML struct {
Head
Indent bool
Prefix []byte
}
// Write outputs the header content.
func (h Head) Write(w http.ResponseWriter) {
w.Header().Set(ContentType, h.ContentType)
w.WriteHeader(h.Status)
}
// Render a data response.
func (d Data) Render(w io.Writer, v interface{}) error {
if hw, ok := w.(http.ResponseWriter); ok {
c := hw.Header().Get(ContentType)
if c != "" {
d.Head.ContentType = c
}
d.Head.Write(hw)
}
w.Write(v.([]byte))
return nil
}
// Render a HTML response.
func (h HTML) Render(w io.Writer, binding interface{}) error {
var buf *bytes.Buffer
if h.bp != nil {
// If we have a bufferpool, allocate from it
buf = h.bp.Get()
defer h.bp.Put(buf)
}
err := h.Templates.ExecuteTemplate(buf, h.Name, binding)
if err != nil {
return err
}
if hw, ok := w.(http.ResponseWriter); ok {
h.Head.Write(hw)
}
buf.WriteTo(w)
return nil
}
// Render a JSON response.
func (j JSON) Render(w io.Writer, v interface{}) error {
if j.StreamingJSON {
return j.renderStreamingJSON(w, v)
}
var result []byte
var err error
if j.Indent {
result, err = json.MarshalIndent(v, "", " ")
result = append(result, '\n')
} else {
result, err = json.Marshal(v)
}
if err != nil {
return err
}
// Unescape HTML if needed.
if j.UnEscapeHTML {
result = bytes.Replace(result, []byte("\\u003c"), []byte("<"), -1)
result = bytes.Replace(result, []byte("\\u003e"), []byte(">"), -1)
result = bytes.Replace(result, []byte("\\u0026"), []byte("&"), -1)
}
// JSON marshaled fine, write out the result.
if hw, ok := w.(http.ResponseWriter); ok {
j.Head.Write(hw)
}
if len(j.Prefix) > 0 {
w.Write(j.Prefix)
}
w.Write(result)
return nil
}
func (j JSON) renderStreamingJSON(w io.Writer, v interface{}) error {
if hw, ok := w.(http.ResponseWriter); ok {
j.Head.Write(hw)
}
if len(j.Prefix) > 0 {
w.Write(j.Prefix)
}
return json.NewEncoder(w).Encode(v)
}
// Render a JSONP response.
func (j JSONP) Render(w io.Writer, v interface{}) error {
var result []byte
var err error
if j.Indent {
result, err = json.MarshalIndent(v, "", " ")
} else {
result, err = json.Marshal(v)
}
if err != nil {
return err
}
// JSON marshaled fine, write out the result.
if hw, ok := w.(http.ResponseWriter); ok {
j.Head.Write(hw)
}
w.Write([]byte(j.Callback + "("))
w.Write(result)
w.Write([]byte(");"))
// If indenting, append a new line.
if j.Indent {
w.Write([]byte("\n"))
}
return nil
}
// Render a text response.
func (t Text) Render(w io.Writer, v interface{}) error {
if hw, ok := w.(http.ResponseWriter); ok {
c := hw.Header().Get(ContentType)
if c != "" {
t.Head.ContentType = c
}
t.Head.Write(hw)
}
w.Write([]byte(v.(string)))
return nil
}
// Render an XML response.
func (x XML) Render(w io.Writer, v interface{}) error {
var result []byte
var err error
if x.Indent {
result, err = xml.MarshalIndent(v, "", " ")
result = append(result, '\n')
} else {
result, err = xml.Marshal(v)
}
if err != nil {
return err
}
// XML marshaled fine, write out the result.
if hw, ok := w.(http.ResponseWriter); ok {
x.Head.Write(hw)
}
if len(x.Prefix) > 0 {
w.Write(x.Prefix)
}
w.Write(result)
return nil
}