289 lines
5.6 KiB
Go
289 lines
5.6 KiB
Go
// Copyright 2014 The Gogs Authors. All rights reserved.
|
|
// Use of this source code is governed by a MIT-style
|
|
// license that can be found in the LICENSE file.
|
|
|
|
// foked from https://github.com/martini-contrib/render/blob/master/render.go
|
|
package middleware
|
|
|
|
import (
|
|
"bytes"
|
|
"encoding/json"
|
|
"fmt"
|
|
"html/template"
|
|
"io"
|
|
"io/ioutil"
|
|
"net/http"
|
|
"os"
|
|
"path/filepath"
|
|
"time"
|
|
|
|
"github.com/go-martini/martini"
|
|
|
|
"github.com/gogits/gogs/modules/base"
|
|
)
|
|
|
|
const (
|
|
ContentType = "Content-Type"
|
|
ContentLength = "Content-Length"
|
|
ContentJSON = "application/json"
|
|
ContentHTML = "text/html"
|
|
ContentXHTML = "application/xhtml+xml"
|
|
defaultCharset = "UTF-8"
|
|
)
|
|
|
|
var helperFuncs = template.FuncMap{
|
|
"yield": func() (string, error) {
|
|
return "", fmt.Errorf("yield called with no layout defined")
|
|
},
|
|
}
|
|
|
|
type Delims struct {
|
|
Left string
|
|
|
|
Right string
|
|
}
|
|
|
|
type RenderOptions struct {
|
|
Directory string
|
|
|
|
Layout string
|
|
|
|
Extensions []string
|
|
|
|
Funcs []template.FuncMap
|
|
|
|
Delims Delims
|
|
|
|
Charset string
|
|
|
|
IndentJSON bool
|
|
|
|
HTMLContentType string
|
|
}
|
|
|
|
type HTMLOptions struct {
|
|
Layout string
|
|
}
|
|
|
|
func Renderer(options ...RenderOptions) martini.Handler {
|
|
opt := prepareOptions(options)
|
|
cs := prepareCharset(opt.Charset)
|
|
t := compile(opt)
|
|
return func(res http.ResponseWriter, req *http.Request, c martini.Context) {
|
|
var tc *template.Template
|
|
if martini.Env == martini.Dev {
|
|
|
|
tc = compile(opt)
|
|
} else {
|
|
|
|
tc, _ = t.Clone()
|
|
}
|
|
|
|
rd := &Render{res, req, tc, opt, cs, base.TmplData{}, time.Time{}}
|
|
|
|
rd.Data["TmplLoadTimes"] = func() string {
|
|
if rd.startTime.IsZero() {
|
|
return ""
|
|
}
|
|
return fmt.Sprint(time.Since(rd.startTime).Nanoseconds()/1e6) + "ms"
|
|
}
|
|
|
|
c.Map(rd.Data)
|
|
c.Map(rd)
|
|
}
|
|
}
|
|
|
|
func prepareCharset(charset string) string {
|
|
if len(charset) != 0 {
|
|
return "; charset=" + charset
|
|
}
|
|
|
|
return "; charset=" + defaultCharset
|
|
}
|
|
|
|
func prepareOptions(options []RenderOptions) RenderOptions {
|
|
var opt RenderOptions
|
|
if len(options) > 0 {
|
|
opt = options[0]
|
|
}
|
|
|
|
if len(opt.Directory) == 0 {
|
|
opt.Directory = "templates"
|
|
}
|
|
if len(opt.Extensions) == 0 {
|
|
opt.Extensions = []string{".tmpl"}
|
|
}
|
|
if len(opt.HTMLContentType) == 0 {
|
|
opt.HTMLContentType = ContentHTML
|
|
}
|
|
|
|
return opt
|
|
}
|
|
|
|
func compile(options RenderOptions) *template.Template {
|
|
dir := options.Directory
|
|
t := template.New(dir)
|
|
t.Delims(options.Delims.Left, options.Delims.Right)
|
|
|
|
template.Must(t.Parse("Martini"))
|
|
|
|
filepath.Walk(dir, func(path string, info os.FileInfo, err error) error {
|
|
r, err := filepath.Rel(dir, path)
|
|
if err != nil {
|
|
return err
|
|
}
|
|
|
|
ext := filepath.Ext(r)
|
|
for _, extension := range options.Extensions {
|
|
if ext == extension {
|
|
|
|
buf, err := ioutil.ReadFile(path)
|
|
if err != nil {
|
|
panic(err)
|
|
}
|
|
|
|
name := (r[0 : len(r)-len(ext)])
|
|
tmpl := t.New(filepath.ToSlash(name))
|
|
|
|
for _, funcs := range options.Funcs {
|
|
tmpl = tmpl.Funcs(funcs)
|
|
}
|
|
|
|
template.Must(tmpl.Funcs(helperFuncs).Parse(string(buf)))
|
|
break
|
|
}
|
|
}
|
|
|
|
return nil
|
|
})
|
|
|
|
return t
|
|
}
|
|
|
|
type Render struct {
|
|
http.ResponseWriter
|
|
req *http.Request
|
|
t *template.Template
|
|
opt RenderOptions
|
|
compiledCharset string
|
|
|
|
Data base.TmplData
|
|
|
|
startTime time.Time
|
|
}
|
|
|
|
func (r *Render) JSON(status int, v interface{}) {
|
|
var result []byte
|
|
var err error
|
|
if r.opt.IndentJSON {
|
|
result, err = json.MarshalIndent(v, "", " ")
|
|
} else {
|
|
result, err = json.Marshal(v)
|
|
}
|
|
if err != nil {
|
|
http.Error(r, err.Error(), 500)
|
|
return
|
|
}
|
|
|
|
r.Header().Set(ContentType, ContentJSON+r.compiledCharset)
|
|
r.WriteHeader(status)
|
|
r.Write(result)
|
|
}
|
|
|
|
func (r *Render) JSONString(v interface{}) (string, error) {
|
|
var result []byte
|
|
var err error
|
|
if r.opt.IndentJSON {
|
|
result, err = json.MarshalIndent(v, "", " ")
|
|
} else {
|
|
result, err = json.Marshal(v)
|
|
}
|
|
if err != nil {
|
|
return "", err
|
|
}
|
|
return string(result), nil
|
|
}
|
|
|
|
func (r *Render) renderBytes(name string, binding interface{}, htmlOpt ...HTMLOptions) (*bytes.Buffer, error) {
|
|
opt := r.prepareHTMLOptions(htmlOpt)
|
|
|
|
if len(opt.Layout) > 0 {
|
|
r.addYield(name, binding)
|
|
name = opt.Layout
|
|
}
|
|
|
|
out, err := r.execute(name, binding)
|
|
if err != nil {
|
|
return nil, err
|
|
}
|
|
|
|
return out, nil
|
|
}
|
|
|
|
func (r *Render) HTML(status int, name string, binding interface{}, htmlOpt ...HTMLOptions) {
|
|
r.startTime = time.Now()
|
|
|
|
out, err := r.renderBytes(name, binding, htmlOpt...)
|
|
if err != nil {
|
|
http.Error(r, err.Error(), http.StatusInternalServerError)
|
|
return
|
|
}
|
|
|
|
r.Header().Set(ContentType, r.opt.HTMLContentType+r.compiledCharset)
|
|
r.WriteHeader(status)
|
|
io.Copy(r, out)
|
|
}
|
|
|
|
func (r *Render) HTMLString(name string, binding interface{}, htmlOpt ...HTMLOptions) (string, error) {
|
|
if out, err := r.renderBytes(name, binding, htmlOpt...); err != nil {
|
|
return "", err
|
|
} else {
|
|
return out.String(), nil
|
|
}
|
|
}
|
|
|
|
func (r *Render) Error(status int, message ...string) {
|
|
r.WriteHeader(status)
|
|
if len(message) > 0 {
|
|
r.Write([]byte(message[0]))
|
|
}
|
|
}
|
|
|
|
func (r *Render) Redirect(location string, status ...int) {
|
|
code := http.StatusFound
|
|
if len(status) == 1 {
|
|
code = status[0]
|
|
}
|
|
|
|
http.Redirect(r, r.req, location, code)
|
|
}
|
|
|
|
func (r *Render) Template() *template.Template {
|
|
return r.t
|
|
}
|
|
|
|
func (r *Render) execute(name string, binding interface{}) (*bytes.Buffer, error) {
|
|
buf := new(bytes.Buffer)
|
|
return buf, r.t.ExecuteTemplate(buf, name, binding)
|
|
}
|
|
|
|
func (r *Render) addYield(name string, binding interface{}) {
|
|
funcs := template.FuncMap{
|
|
"yield": func() (template.HTML, error) {
|
|
buf, err := r.execute(name, binding)
|
|
|
|
return template.HTML(buf.String()), err
|
|
},
|
|
}
|
|
r.t.Funcs(funcs)
|
|
}
|
|
|
|
func (r *Render) prepareHTMLOptions(htmlOpt []HTMLOptions) HTMLOptions {
|
|
if len(htmlOpt) > 0 {
|
|
return htmlOpt[0]
|
|
}
|
|
|
|
return HTMLOptions{
|
|
Layout: r.opt.Layout,
|
|
}
|
|
}
|