1 files changed, 98 insertions, 0 deletions
diff --git a/server.go b/server.go
new file mode 100644
index 0000000..502a038
--- /dev/null
+++ b/server.go
@@ -0,0 +1,98 @@
+package main
+
+import (
+	"errors"
+	"log"
+	"net/http"
+	"os"
+	"strings"
+	"time"
+)
+
+var url string
+
+const CookieName = "eurothomasvosscom_users-language"
+
+func isSupportedLanguage(lang string) bool {
+	if len(lang) != 2 {
+		return false
+	}
+	_, err := os.Stat(lang)
+	return !os.IsNotExist(err)
+}
+
+func router(w http.ResponseWriter, r *http.Request) {
+	if r.Method != http.MethodGet {
+		http.Error(w, "Method is not supported.", http.StatusMethodNotAllowed)
+		return
+	}
+
+	var lang string
+	cookie, err := r.Cookie(CookieName)
+	if err != nil && !errors.Is(err, http.ErrNoCookie) {
+		log.Println(err)
+		http.Error(w, "An error occured", http.StatusInternalServerError)
+		return
+	} else if err != nil {
+		lang = "en/"
+	} else {
+		lang = cookie.Value
+	}
+
+	if r.URL.Path == "/" {
+		http.SetCookie(w, &http.Cookie{
+			Name: "redirect",
+			Path: "/",
+		})
+		http.Redirect(w, r, lang, http.StatusMovedPermanently)
+		return
+	}
+
+	path := r.URL.Path[1:]
+	parts := strings.Split(path, "/")
+
+	_, err = r.Cookie("redirect")
+	if isSupportedLanguage(parts[0]) {
+		if r.Header.Get("Referer") == "" && err != nil {
+			parts[0] = lang
+			path = strings.Join(parts, "/")
+			http.SetCookie(w, &http.Cookie{
+				Name: "redirect",
+				Path: "/",
+			})
+			http.Redirect(w, r, url + path, http.StatusMovedPermanently)
+			return
+		}
+
+		if r.Header.Get("Referer") != "" {
+			http.SetCookie(w, &http.Cookie{
+				Name: CookieName,
+				Value: parts[0],
+				Path:  "/",
+			})
+		}
+	}
+
+	if err == nil {
+		http.SetCookie(w, &http.Cookie{
+			Name:    "redirect",
+			Expires: time.Unix(0, 0),
+			Path:    "/",
+		})
+	}
+	http.ServeFile(w, r, path)
+}
+
+func main() {
+	if len(os.Args) == 2 {
+		url = os.Args[1]
+	} else {
+		url = "http://localhost:8000/"
+	}
+
+	if err := os.Chdir("out"); err != nil {
+		panic(err)
+	}
+	http.HandleFunc("/", router)
+	log.Fatal(http.ListenAndServe(":8000", nil))
+}