allow redirects

bot.py

@@ -53,11 +53,12 @@ class CustomClient(discord.Client):
                     timeout=aiohttp.ClientTimeout(total=5)
                 ) as session:
                     resp = await session.head(
-                        "https://stream.purser.it/{stripped}/?provider=seafile&raw=true"
+                        "https://stream.purser.it/{stripped}/?provider=seafile&raw=true",
+                        allow_redirects=True,
                     )
-                    raw = (
-                        ctype := resp.headers.get("content-type")
-                    ) and "image" in ctype
+                    raw = str(
+                        (ctype := resp.headers.get("content-type")) and "image" in ctype
+                    ).lower()
 
                     await message.reply(
                         content=f"https://stream.purser.it/{stripped}/?provider=seafile&raw={raw}"