Added custom 404 error page

.all-contributorsrc

@@ -126,6 +126,15 @@
         "code",
         "ideas"
       ]
+    },
+    {
+      "login": "DelfinSR",
+      "name": "Delfin",
+      "avatar_url": "https://avatars.githubusercontent.com/u/91948384?v=4",
+      "profile": "https://github.com/DelfinSR",
+      "contributions": [
+        "code"
+      ]
     }
   ],
   "contributorsPerLine": 7,

README.md

@@ -96,6 +96,7 @@ Huge thanks to the following people that contributed to Artemis development!
       <td align="center" valign="top" width="14.28%"><a href="https://github.com/mimi89999"><img src="https://avatars.githubusercontent.com/u/8530546?v=4?s=100" width="100px;" alt="Michel Le Bihan"/><br /><sub><b>Michel Le Bihan</b></sub></a><br /><a href="https://github.com/CERT-Polska/Artemis/commits?author=mimi89999" title="Code">💻</a></td>
       <td align="center" valign="top" width="14.28%"><a href="https://eliszewski.pl/"><img src="https://avatars.githubusercontent.com/u/565758?v=4?s=100" width="100px;" alt="Grzegorz Eliszewski"/><br /><sub><b>Grzegorz Eliszewski</b></sub></a><br /><a href="https://github.com/CERT-Polska/Artemis/commits?author=es1o" title="Code">💻</a> <a href="#ideas-es1o" title="Ideas, Planning, & Feedback">🤔</a> <a href="#platform-es1o" title="Packaging/porting to new platform">📦</a></td>
       <td align="center" valign="top" width="14.28%"><a href="https://github.com/kshitijk4poor"><img src="https://avatars.githubusercontent.com/u/82637225?v=4?s=100" width="100px;" alt="kshitij kapoor"/><br /><sub><b>kshitij kapoor</b></sub></a><br /><a href="https://github.com/CERT-Polska/Artemis/commits?author=kshitijk4poor" title="Code">💻</a> <a href="#ideas-kshitijk4poor" title="Ideas, Planning, & Feedback">🤔</a></td>
+      <td align="center" valign="top" width="14.28%"><a href="https://github.com/DelfinSR"><img src="https://avatars.githubusercontent.com/u/91948384?v=4?s=100" width="100px;" alt="Delfin"/><br /><sub><b>Delfin</b></sub></a><br /><a href="https://github.com/CERT-Polska/Artemis/commits?author=DelfinSR" title="Code">💻</a></td>
     </tr>
   </tbody>
 </table>

artemis/frontend.py

@@ -72,6 +72,10 @@ def get_binds_that_can_be_disabled() -> List[KartonBind]:
     return binds
 
 
+def error_content_not_found(request: Request, exc: HTTPException) -> Response:
+    return templates.TemplateResponse("not_found.jinja2", {"request": request}, status_code=404)
+
+
 @router.get("/", include_in_schema=False)
 def get_root(request: Request) -> Response:
     karton_state = KartonState(backend=KartonBackend(config=KartonConfig()))

artemis/main.py

@@ -8,10 +8,12 @@
 from artemis import csrf, db_migration
 from artemis.api import router as router_api
 from artemis.db import DB
+from artemis.frontend import error_content_not_found
 from artemis.frontend import router as router_front
 
 app = FastAPI()
 app.exception_handler(CsrfProtectError)(csrf.csrf_protect_exception_handler)
+app.exception_handler(404)(error_content_not_found)
 
 db = DB()
 

templates/not_found.jinja2

@@ -0,0 +1,7 @@
+{% extends "components/base.jinja2" %}
+{% block main %}
+    <h1>404 - Not Found</h1>
+    <p>
+        Content not found.
+    </p>
+{% endblock %}