Add vary accept-language header

util/languages/translation.go

@@ -2,8 +2,8 @@ package languages
 
 import (
 	"fmt"
-	"github.com/nicksnyder/go-i18n/i18n"
 	"github.com/ewhal/nyaa/service/user"
+	"github.com/nicksnyder/go-i18n/i18n"
 	"html/template"
 	"net/http"
 )
@@ -22,7 +22,7 @@ func TfuncWithFallback(language string, languages ...string) (i18n.TranslateFunc
 
 	if err1 != nil && err2 != nil {
 		// fallbackT is still a valid function even with the error, it returns translationID.
-		return fallbackT, err2;
+		return fallbackT, err2
 	}
 
 	return func(translationID string, args ...interface{}) string {
@@ -42,7 +42,7 @@ func GetAvailableLanguages() (languages map[string]string) {
 		/* Translation files should have an ID with the translated language name.
 		   If they don't, just use the languageTag */
 		if languageName := T("language_name"); languageName != "language_name" {
-			languages[languageTag] = languageName;
+			languages[languageTag] = languageName
 		} else {
 			languages[languageTag] = languageTag
 		}
@@ -67,7 +67,7 @@ func SetTranslationFromRequest(tmpl *template.Template, r *http.Request, default
 	userLanguage := ""
 	user, _, err := userService.RetrieveCurrentUser(r)
 	if err == nil {
-		userLanguage = user.Language;
+		userLanguage = user.Language
 	}
 
 	cookie, err := r.Cookie("lang")
@@ -78,5 +78,6 @@ func SetTranslationFromRequest(tmpl *template.Template, r *http.Request, default
 
 	// go-i18n supports the format of the Accept-Language header, thankfully.
 	headerLanguage := r.Header.Get("Accept-Language")
+	r.Header.Add("Vary", "Accept-Encoding")
 	return SetTranslation(tmpl, userLanguage, cookieLanguage, headerLanguage, defaultLanguage)
 }