change to the buchungs system

Website/main.py

@@ -3714,12 +3714,16 @@ def run_tenant_provisioning_async(app, user_id, tenant_slug, school_name, user_e
 @app.route('/booking_payment_async', methods=['POST'])
 @login_required
 def booking_payment_async():
+    try:
         user_id = session.get("user_id")
         user_email = session.get("email")
         tenant_slug = _slugify_subdomain(request.form.get('tenant_slug'))
         school_name = request.form.get('school_name', tenant_slug)
 
-    # Insert request record into instance_requests
+        if not tenant_slug:
+            return jsonify({"success": False, "error": "Ungültige Subdomain angegeben."}), 400
+
+        # Datenbank-Eintrag erstellen...
         req_client, req_col = _get_collection("instance_requests")
         try:
             prov_doc = {
@@ -3734,7 +3738,7 @@ def booking_payment_async():
         finally:
             req_client.close()
 
-    # Start async worker passing prov_id
+        # Asynchronen Thread starten...
         thread = threading.Thread(
             target=run_tenant_provisioning_async,
             args=(app._get_current_object(), user_id, tenant_slug, school_name, user_email, prov_id)
@@ -3747,6 +3751,10 @@ def booking_payment_async():
             "request_id": prov_id
         }), 200
 
+    except Exception as e:
+        # WICHTIG: Fängt jegliche Python-Fehler ab und sendet sauberes JSON statt HTML-Crash
+        return jsonify({"success": False, "error": str(e)}), 500
+
 @app.route('/instance_request/status')
 def tenant_status():
     slug = request.args.get('slug')

Website/templates/schnell_buchung.html

@@ -482,18 +482,21 @@
                 headers: { 'Accept': 'application/json' }
             });
             
-            const result = await response.json();
+            // Prüfen, ob der Server echtes JSON zurückgibt
-
+            const contentType = response.headers.get("content-type");
-            if (!response.ok) {
+            let result;
-                throw new Error(result.error || 'Es gab ein Problem bei der Buchung.');
+            if (contentType && contentType.includes("application/json")) {
+                result = await response.json();
+            } else {
+                // Wenn der Server HTML schickt (z.B. Flask Debugger Error Page)
+                const rawText = await response.text();
+                console.error("Server hat kein JSON gesendet:", rawText);
+                throw new Error("Ein Serverfehler ist aufgetreten. Bitte prüfen Sie die Konsolenausgabe.");
             }
             
-            // Erfolg: Formular verstecken, Ladebildschirm zeigen
+            if (!response.ok || !result.success) {
-            formState.style.display = 'none';
+                throw new Error(result.error || 'Es gab ein Problem bei der Buchung.');
-            loadingState.style.display = 'block';
+            }
-
-            // Starte Polling
-            startPolling(tenantSlug);
 
         } catch (error) {
             errorAlert.textContent = error.message;