Start supporting a server blocklist

app/utils/url.py

@@ -5,6 +5,7 @@ from urllib.parse import urlparse
 
 from loguru import logger
 
+from app.config import BLOCKED_SERVERS
 from app.config import DEBUG
 
 
@@ -53,6 +54,10 @@ def is_url_valid(url: str) -> bool:
     if not parsed.hostname or parsed.hostname.lower() in ["localhost"]:
         return False
 
+    if parsed.hostname in BLOCKED_SERVERS:
+        logger.warning(f"{parsed.hostname} is blocked")
+        return False
+
     ip_address = _getaddrinfo(
         parsed.hostname, parsed.port or (80 if parsed.scheme == "http" else 443)
     )