mirror of
https://github.com/go-gitea/gitea.git
synced 2024-08-20 03:23:26 +02:00
226 lines
6.1 KiB
Go
226 lines
6.1 KiB
Go
// Copyright 2014 The Macaron Authors
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//
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// Licensed under the Apache License, Version 2.0 (the "License"): you may
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// not use this file except in compliance with the License. You may obtain
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// a copy of the License at
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//
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// http://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
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// distributed under the License is distributed on an "AS IS" BASIS, WITHOUT
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// WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. See the
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// License for the specific language governing permissions and limitations
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// under the License.
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// Package i18n is a middleware that provides app Internationalization and Localization of Macaron.
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package i18n
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import (
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"fmt"
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"path"
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"strings"
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"github.com/Unknwon/com"
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"github.com/Unknwon/i18n"
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"golang.org/x/text/language"
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"gopkg.in/macaron.v1"
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)
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const _VERSION = "0.3.0"
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func Version() string {
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return _VERSION
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}
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// initLocales initializes language type list and Accept-Language header matcher.
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func initLocales(opt Options) language.Matcher {
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tags := make([]language.Tag, len(opt.Langs))
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for i, lang := range opt.Langs {
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tags[i] = language.Raw.Make(lang)
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fname := fmt.Sprintf(opt.Format, lang)
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// Append custom locale file.
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custom := []interface{}{}
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customPath := path.Join(opt.CustomDirectory, fname)
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if com.IsFile(customPath) {
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custom = append(custom, customPath)
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}
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var locale interface{}
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if data, ok := opt.Files[fname]; ok {
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locale = data
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} else {
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locale = path.Join(opt.Directory, fname)
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}
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err := i18n.SetMessageWithDesc(lang, opt.Names[i], locale, custom...)
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if err != nil && err != i18n.ErrLangAlreadyExist {
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panic(fmt.Errorf("fail to set message file(%s): %v", lang, err))
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}
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}
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return language.NewMatcher(tags)
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}
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// A Locale describles the information of localization.
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type Locale struct {
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i18n.Locale
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}
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// Language returns language current locale represents.
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func (l Locale) Language() string {
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return l.Lang
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}
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// Options represents a struct for specifying configuration options for the i18n middleware.
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type Options struct {
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// Suburl of path. Default is empty.
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SubURL string
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// Directory to load locale files. Default is "conf/locale"
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Directory string
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// File stores actual data of locale files. Used for in-memory purpose.
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Files map[string][]byte
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// Custom directory to overload locale files. Default is "custom/conf/locale"
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CustomDirectory string
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// Langauges that will be supported, order is meaningful.
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Langs []string
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// Human friendly names corresponding to Langs list.
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Names []string
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// Default language locale, leave empty to remain unset.
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DefaultLang string
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// Locale file naming style. Default is "locale_%s.ini".
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Format string
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// Name of language parameter name in URL. Default is "lang".
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Parameter string
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// Redirect when user uses get parameter to specify language.
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Redirect bool
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// Name that maps into template variable. Default is "i18n".
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TmplName string
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// Configuration section name. Default is "i18n".
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Section string
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}
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func prepareOptions(options []Options) Options {
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var opt Options
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if len(options) > 0 {
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opt = options[0]
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}
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if len(opt.Section) == 0 {
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opt.Section = "i18n"
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}
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sec := macaron.Config().Section(opt.Section)
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opt.SubURL = strings.TrimSuffix(opt.SubURL, "/")
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if len(opt.Langs) == 0 {
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opt.Langs = sec.Key("LANGS").Strings(",")
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}
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if len(opt.Names) == 0 {
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opt.Names = sec.Key("NAMES").Strings(",")
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}
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if len(opt.Langs) == 0 {
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panic("no language is specified")
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} else if len(opt.Langs) != len(opt.Names) {
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panic("length of langs is not same as length of names")
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}
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i18n.SetDefaultLang(opt.DefaultLang)
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if len(opt.Directory) == 0 {
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opt.Directory = sec.Key("DIRECTORY").MustString("conf/locale")
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}
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if len(opt.CustomDirectory) == 0 {
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opt.CustomDirectory = sec.Key("CUSTOM_DIRECTORY").MustString("custom/conf/locale")
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}
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if len(opt.Format) == 0 {
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opt.Format = sec.Key("FORMAT").MustString("locale_%s.ini")
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}
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if len(opt.Parameter) == 0 {
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opt.Parameter = sec.Key("PARAMETER").MustString("lang")
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}
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if !opt.Redirect {
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opt.Redirect = sec.Key("REDIRECT").MustBool()
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}
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if len(opt.TmplName) == 0 {
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opt.TmplName = sec.Key("TMPL_NAME").MustString("i18n")
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}
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return opt
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}
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type LangType struct {
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Lang, Name string
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}
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// I18n is a middleware provides localization layer for your application.
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// Paramenter langs must be in the form of "en-US", "zh-CN", etc.
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// Otherwise it may not recognize browser input.
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func I18n(options ...Options) macaron.Handler {
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opt := prepareOptions(options)
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m := initLocales(opt)
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return func(ctx *macaron.Context) {
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isNeedRedir := false
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hasCookie := false
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// 1. Check URL arguments.
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lang := ctx.Query(opt.Parameter)
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// 2. Get language information from cookies.
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if len(lang) == 0 {
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lang = ctx.GetCookie("lang")
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hasCookie = true
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} else {
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isNeedRedir = true
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}
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// Check again in case someone modify by purpose.
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if !i18n.IsExist(lang) {
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lang = ""
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isNeedRedir = false
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hasCookie = false
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}
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// 3. Get language information from 'Accept-Language'.
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// The first element in the list is chosen to be the default language automatically.
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if len(lang) == 0 {
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tags, _, _ := language.ParseAcceptLanguage(ctx.Req.Header.Get("Accept-Language"))
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tag, _, _ := m.Match(tags...)
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lang = tag.String()
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isNeedRedir = false
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}
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curLang := LangType{
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Lang: lang,
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}
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// Save language information in cookies.
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if !hasCookie {
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ctx.SetCookie("lang", curLang.Lang, 1<<31-1, "/"+strings.TrimPrefix(opt.SubURL, "/"))
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}
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restLangs := make([]LangType, 0, i18n.Count()-1)
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langs := i18n.ListLangs()
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names := i18n.ListLangDescs()
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for i, v := range langs {
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if lang != v {
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restLangs = append(restLangs, LangType{v, names[i]})
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} else {
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curLang.Name = names[i]
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}
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}
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// Set language properties.
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locale := Locale{i18n.Locale{lang}}
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ctx.Map(locale)
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ctx.Locale = locale
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ctx.Data[opt.TmplName] = locale
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ctx.Data["Tr"] = i18n.Tr
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ctx.Data["Lang"] = locale.Lang
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ctx.Data["LangName"] = curLang.Name
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ctx.Data["AllLangs"] = append([]LangType{curLang}, restLangs...)
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ctx.Data["RestLangs"] = restLangs
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if opt.Redirect && isNeedRedir {
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ctx.Redirect(opt.SubURL + ctx.Req.RequestURI[:strings.Index(ctx.Req.RequestURI, "?")])
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}
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}
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}
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