feat(global): introduce user teams and new UAC system (#868)

api/http/handler/file.go

@@ -0,0 +1,37 @@
+package handler
+
+import (
+	"net/http"
+	"strings"
+)
+
+// FileHandler represents an HTTP API handler for managing static files.
+type FileHandler struct {
+	http.Handler
+}
+
+// NewFileHandler returns a new instance of FileHandler.
+func NewFileHandler(assetPath string) *FileHandler {
+	h := &FileHandler{
+		Handler: http.FileServer(http.Dir(assetPath)),
+	}
+	return h
+}
+
+func isHTML(acceptContent []string) bool {
+	for _, accept := range acceptContent {
+		if strings.Contains(accept, "text/html") {
+			return true
+		}
+	}
+	return false
+}
+
+func (fileHandler *FileHandler) ServeHTTP(w http.ResponseWriter, r *http.Request) {
+	if !isHTML(r.Header["Accept"]) {
+		w.Header().Set("Cache-Control", "max-age=31536000")
+	} else {
+		w.Header().Set("Cache-Control", "no-cache, no-store, must-revalidate")
+	}
+	fileHandler.Handler.ServeHTTP(w, r)
+}