Adding error 503 catcher

aurweb/asgi.py

@@ -8,12 +8,12 @@ from starlette.middleware.sessions import SessionMiddleware
 import aurweb.config
 
 from aurweb.db import get_engine
-from aurweb.routers import html, sso
+from aurweb.routers import html, sso, errors
 
 routes = set()
 
 # Setup the FastAPI app.
-app = FastAPI()
+app = FastAPI(exception_handlers=errors.exceptions)
 
 
 @app.on_event("startup")

aurweb/routers/errors.py

@@ -8,7 +8,13 @@ async def not_found(request, exc):
     return render_template("errors/404.html", context)
 
 
+async def service_unavailable(request, exc):
+    _ = l10n.get_translator_for_request(request)
+    context = make_context(request, "503 - {_('Service Unavailable')}")
+    return render_template("errors/503.html", context)
+
 # Maps HTTP errors to functions
 exceptions = {
     404: not_found,
+    503: service_unavailable
 }

templates/errors/503.html

@@ -0,0 +1,8 @@
+{% extends 'partials/layout.html' %}
+
+{% block pageContent %}
+  <div class="box 404">
+    <h2>503 - {% trans %}Service Unavailable{% endtrans %}</h2>
+    <p>{% trans %}Don't panic! This site is down due to maintenance. We will be back soon.{% endtrans %}</p>
+  </div>
+{% endblock %}