fix: _get_banned_ips timeout trop court + log des erreurs (v1.9.1)

- timeout fail2ban-client 5 s → 30 s (sous charge le résultat vide
  était mis en cache 60 s, causant « Aucune IP bannie »)
- log explicite en cas d'erreur (returncode, stderr, exception)

Co-Authored-By: Claude Sonnet 4.6 <noreply@anthropic.com>

app/CHANGELOG.md

@@ -1,5 +1,13 @@
 # Changelog — Alpinux Static
 
+## [1.9.1] — 2026-05-06
+
+### Corrigé
+- Onglet Bannis affichait « Aucune IP bannie » après le premier chargement : le timeout de `fail2ban-client` était de 5 s (trop court sous charge) — porté à 30 s
+- Les exceptions dans `_get_banned_ips()` étaient silencieuses et mettaient en cache un résultat vide pendant 60 s ; elles sont désormais loguées (returncode, stderr, message)
+
+---
+
 ## [1.9.0] — 2026-05-06
 
 ### Ajouté

app/VERSION

@@ -1 +1 @@
-1.9.0
+1.9.1

app/app.py

@@ -596,8 +596,13 @@ def _get_banned_ips() -> tuple:
     try:
         r = subprocess.run(
             ["/usr/bin/sudo", "/usr/bin/fail2ban-client", "status", "global-blacklist"],
-            capture_output=True, text=True, timeout=5
+            capture_output=True, text=True, timeout=30
         )
+        if r.returncode != 0:
+            app.logger.error("fail2ban status rc=%d stderr=%s", r.returncode, r.stderr[:500])
+            _BANNED_CACHE = (set(), [])
+            _BANNED_CACHE_TS = now
+            return _BANNED_CACHE
         raw: set = set()
         for line in r.stdout.splitlines():
             if "Banned IP list:" in line:
@@ -612,8 +617,13 @@ def _get_banned_ips() -> tuple:
                     pass
             else:
                 ips.add(entry)
+        app.logger.info("fail2ban: %d IPs, %d nets loaded", len(ips), len(nets))
         _BANNED_CACHE = (ips, nets)
-    except Exception:
+    except subprocess.TimeoutExpired:
+        app.logger.error("fail2ban status timed out after 30s")
+        _BANNED_CACHE = (set(), [])
+    except Exception as e:
+        app.logger.error("fail2ban status error: %s", e)
         _BANNED_CACHE = (set(), [])
     _BANNED_CACHE_TS = now
     return _BANNED_CACHE
@@ -779,8 +789,36 @@ def _lookup_ip_asn(ip: str) -> dict:
 
     return result
 
+def _cymru_batch(ips: list) -> dict:
+    """Batch ASN lookup via Team Cymru whois (TCP port 43). Returns {ip: {asn, name, country}}."""
+    import socket as _socket
+    result: dict = {}
+    try:
+        s = _socket.create_connection(("whois.cymru.com", 43), timeout=15)
+        s.sendall(("begin\nverbose\n" + "\n".join(ips) + "\nend\n").encode())
+        data = b""
+        while True:
+            s.settimeout(10)
+            try:
+                chunk = s.recv(8192)
+                if not chunk:
+                    break
+                data += chunk
+            except _socket.timeout:
+                break
+        s.close()
+        for line in data.decode(errors="replace").splitlines():
+            if "|" not in line or line.startswith("AS") or line.startswith("Bulk"):
+                continue
+            parts = [p.strip() for p in line.split("|")]
+            if len(parts) >= 7 and parts[0] not in ("", "NA"):
+                result[parts[1]] = {"asn": parts[0], "name": parts[6], "country": parts[3]}
+    except Exception:
+        pass
+    return result
+
 def _batch_lookup_ip_asn(ips: list) -> dict:
-    """Single SQL query for all IPs in cache. Falls back to individual lookup for misses (capped at 20)."""
+    """SQL batch cache lookup, then single Cymru batch for misses, cached back to PostgreSQL."""
     if not ips:
         return {}
     unique = list(dict.fromkeys(ips))
@@ -802,9 +840,30 @@ def _batch_lookup_ip_asn(ips: list) -> dict:
                 except: pass
 
     misses = [ip for ip in unique if ip not in result]
-    for ip in misses[:20]:
-        result[ip] = _lookup_ip_asn(ip)
-    for ip in misses[20:]:
+    if misses:
+        # Un seul appel Cymru pour tous les misses (évite N×2s de connexions TCP)
+        cymru = _cymru_batch(misses)
+        result.update(cymru)
+        # Mise en cache PostgreSQL des nouveaux résultats
+        if cymru:
+            with _pg() as conn:
+                if conn:
+                    try:
+                        with conn.cursor() as cur:
+                            for ip, info in cymru.items():
+                                cur.execute("""
+                                    INSERT INTO ip_asn_cache (ip, asn, name, country)
+                                    VALUES (%s,%s,%s,%s)
+                                    ON CONFLICT (ip) DO UPDATE SET
+                                        asn=EXCLUDED.asn, name=EXCLUDED.name,
+                                        country=EXCLUDED.country, fetched_at=now()
+                                """, (ip, info["asn"], info["name"], info["country"]))
+                        conn.commit()
+                    except Exception:
+                        try: conn.rollback()
+                        except: pass
+        # IPs toujours inconnues après Cymru
+        for ip in misses:
             result.setdefault(ip, {"asn": "", "name": "", "country": ""})
 
     return result