added manual URL entry

db.py

@@ -20,6 +20,22 @@ BLOCKED_NETWORKS = [
 ]
 
 
+def _is_blocked_response(html, status_code):
+    """Check if response is a CDN challenge/block page."""
+    if status_code == 403:
+        return True
+    html_lower = html.lower()
+    if "just a moment" in html_lower or "cloudflare" in html_lower:
+        return True
+    if "enable javascript and cookies" in html_lower:
+        return True
+    if "request rejected" in html_lower:
+        return True
+    if "access denied" in html_lower:
+        return True
+    return False
+
+
 def _validate_url_target(url):
     """Resolve hostname and block private/internal IPs to prevent SSRF."""
     parsed = urlparse(url)
@@ -281,6 +297,10 @@ def get_site_name():
 def fetch_page(url):
     _validate_url_target(url)
     resp = requests.get(url, timeout=10, headers={"User-Agent": "TinyWeb/1.0"}, allow_redirects=False)
+
+    if _is_blocked_response(resp.text, resp.status_code):
+        raise Exception(f"Site blocks automated access: {resp.status_code}")
+
     # Follow redirects manually, re-validating each target
     max_redirects = 5
     while resp.is_redirect and max_redirects > 0: