From e5b01f7c6ef59d28033000044c84f7a2485f56fc Mon Sep 17 00:00:00 2001
From: Nicolas Gruber <nicolas.gruber@etm.at>
Date: Mon, 19 Oct 2026 17:33:12 +0200
Subject: [PATCH] =?UTF-8?q?Fix:=20Cache-Busting=20fuer=20JS/CSS=20(=3Fv=3D?=
 =?UTF-8?q?Inhalts-Hash)=20+=20Cache-Control:=20no-cache=20=E2=80=94=20alt?=
 =?UTF-8?q?e=20gecachte=20app.js=20ohne=20Such-Polling=20verhinderte=20Liv?=
 =?UTF-8?q?e-Ergebnisse?=
MIME-Version: 1.0
Content-Type: text/plain; charset=UTF-8
Content-Transfer-Encoding: 8bit

---
 app/main.py             | 17 ++++++++++++++++-
 app/templates/base.html |  4 ++--
 2 files changed, 18 insertions(+), 3 deletions(-)

diff --git a/app/main.py b/app/main.py
index c2f4d5a..493e92e 100644
--- a/app/main.py
+++ b/app/main.py
@@ -1,4 +1,5 @@
 """CIS Enhanced - FastAPI app."""
+import hashlib
 import json
 import os
 import threading
@@ -33,7 +34,8 @@ client = CISClient(os.environ["CIS_USER"], os.environ["CIS_PASSWORD"], BASE)
 OWN_UID = os.environ.get("OWN_UID", os.environ["CIS_USER"])
 
 app = FastAPI(title="CIS Enhanced")
-app.mount("/static", StaticFiles(directory=str(Path(__file__).parent / "static")), name="static")
+_STATIC_DIR = Path(__file__).parent / "static"
+app.mount("/static", StaticFiles(directory=str(_STATIC_DIR)), name="static")
 templates = Jinja2Templates(directory=str(Path(__file__).parent / "templates"))
 templates.env.globals["lv_color"] = lv_color
 templates.env.globals["decode_matrikel"] = decode_matrikel
@@ -41,6 +43,19 @@ templates.env.globals["fmt_range"] = fmt_range
 templates.env.globals["week_label"] = week_label
 templates.env.globals["slots"] = SLOTS
 
+# Cache-Busting: Version = Hash der JS/CSS-Inhalte (neue URL => kein veralteter Browser-Cache)
+_APP_HASH = hashlib.md5(
+    (_STATIC_DIR / "app.js").read_bytes() + (_STATIC_DIR / "style.css").read_bytes()
+).hexdigest()[:10]
+templates.env.globals["app_version"] = _APP_HASH
+
+
+@app.middleware("http")
+async def _no_cache(request: Request, call_next):
+    resp = await call_next(request)
+    resp.headers["Cache-Control"] = "no-cache"
+    return resp
+
 
 def _meta():
     return client.meta()
diff --git a/app/templates/base.html b/app/templates/base.html
index 1de0dab..c45ae3b 100644
--- a/app/templates/base.html
+++ b/app/templates/base.html
@@ -4,7 +4,7 @@
 <meta charset="utf-8">
 <meta name="viewport" content="width=device-width, initial-scale=1">
 <title>{% block title %}CIS Enhanced{% endblock %} | FH-Burgenland</title>
-<link rel="stylesheet" href="/static/style.css">
+<link rel="stylesheet" href="/static/style.css?v={{ app_version }}">
 </head>
 <body>
 {% set path = request.url.path %}
@@ -32,6 +32,6 @@
   </div>
 </footer>
 {% block scripts %}{% endblock %}
-<script src="/static/app.js"></script>
+<script src="/static/app.js?v={{ app_version }}"></script>
 </body>
 </html>