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- // Copyright 2020 The Gitea Authors. All rights reserved.
- // SPDX-License-Identifier: MIT
-
- package middleware
-
- import (
- "net/http"
-
- "code.gitea.io/gitea/modules/setting"
- "code.gitea.io/gitea/modules/translation"
- "code.gitea.io/gitea/modules/translation/i18n"
-
- "golang.org/x/text/language"
- )
-
- // Locale handle locale
- func Locale(resp http.ResponseWriter, req *http.Request) translation.Locale {
- // 1. Check URL arguments.
- lang := req.URL.Query().Get("lang")
- changeLang := lang != ""
-
- // 2. Get language information from cookies.
- if len(lang) == 0 {
- ck, _ := req.Cookie("lang")
- if ck != nil {
- lang = ck.Value
- }
- }
-
- // Check again in case someone changes the supported language list.
- if lang != "" && !i18n.DefaultLocales.HasLang(lang) {
- lang = ""
- changeLang = false
- }
-
- // 3. Get language information from 'Accept-Language'.
- // The first element in the list is chosen to be the default language automatically.
- if len(lang) == 0 {
- tags, _, _ := language.ParseAcceptLanguage(req.Header.Get("Accept-Language"))
- tag := translation.Match(tags...)
- lang = tag.String()
- }
-
- if changeLang {
- SetLocaleCookie(resp, lang, 1<<31-1)
- }
-
- return translation.NewLocale(lang)
- }
-
- // SetLocaleCookie convenience function to set the locale cookie consistently
- func SetLocaleCookie(resp http.ResponseWriter, lang string, expiry int) {
- SetCookie(resp, "lang", lang, expiry,
- setting.AppSubURL,
- setting.SessionConfig.Domain,
- setting.SessionConfig.Secure,
- true,
- SameSite(setting.SessionConfig.SameSite))
- }
-
- // DeleteLocaleCookie convenience function to delete the locale cookie consistently
- // Setting the lang cookie will trigger the middleware to reset the language to previous state.
- func DeleteLocaleCookie(resp http.ResponseWriter) {
- SetCookie(resp, "lang", "",
- -1,
- setting.AppSubURL,
- setting.SessionConfig.Domain,
- setting.SessionConfig.Secure,
- true,
- SameSite(setting.SessionConfig.SameSite))
- }
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