Prompt for basic auth on HTML view

Fixes #1

Author: RealOrangeOne

calmerge/views.py

@@ -67,7 +67,7 @@ async def calendar_html(request: web.Request) -> web.Response:
     if calendar_config.auth and not calendar_config.auth.validate_header(
         request.headers.get("Authorization", "")
     ):
-        raise web.HTTPNotFound()
+        raise web.HTTPUnauthorized(headers={hdrs.WWW_AUTHENTICATE: "Basic"})
 
     response = aiohttp_jinja2.render_template(
         "calendar.html", request, {"calendar": calendar_config}

tests/test_calendar_html_view.py

@@ -14,7 +14,7 @@ async def test_unknown_calendar(client: TestClient) -> None:
 
 async def test_404_without_auth(client: TestClient) -> None:
     response = await client.get("/python-authed.html")
-    assert response.status == 404
+    assert response.status == 401
 
 
 async def test_requires_auth(client: TestClient) -> None: