Release v1.7.17: Alpine.js CSP build, O365 API window clamping

backend/sources/unified_audit.py

@@ -11,13 +11,25 @@ AUDIT_CONTENT_TYPES = {
 }
 
 
+# Office 365 Management Activity API hard limits
+_API_MAX_WINDOW_HOURS = 24
+_API_MAX_LOOKBACK_DAYS = 7
+
+
 def _time_window(hours: int, since: str | None = None):
     end = datetime.utcnow()
+    earliest_allowed = end - timedelta(days=_API_MAX_LOOKBACK_DAYS)
+    max_window_start = end - timedelta(hours=_API_MAX_WINDOW_HOURS)
+
     if since:
         # Office 365 API expects format without Z
         start = datetime.fromisoformat(since.replace("Z", "+00:00")).replace(tzinfo=None)
+        # Clamp: the API rejects windows > 24 h or start times > 7 days in the past.
+        # If the watermark is stale (e.g. after a long outage), cap to the most recent
+        # 24-hour window so the API accepts the request; subsequent fetches catch up.
+        start = max(start, earliest_allowed, max_window_start)
     else:
-        start = end - timedelta(hours=hours)
+        start = max(end - timedelta(hours=min(hours, _API_MAX_WINDOW_HOURS)), earliest_allowed)
     return start.strftime("%Y-%m-%dT%H:%M:%S"), end.strftime("%Y-%m-%dT%H:%M:%S")