shorten filenames

caricari/private.py

@@ -58,11 +58,13 @@ def normalize_filename(filename: str):
     'ciao'
     >>> normalize_filename("Hello, 42 worlds!")
     'Hello42worlds'
+    >>> normalize_filename("Hey, do you want to hear my story?" * 10)
+    'HeydoyouwanttohearmystoryHeydo'
     """
     return "".join(
             c for c in filename
             if c.isalnum() or c in '-_'
-            )
+            )[:40]
 
 @app.post("/upload")
 async def upload(