exposing-apis-to-widgets

Securely exposing APIs to widgets uses window.postMessage with a defined Widget Protocol for permission-based routing and authentication checks. This prevents token leakage while granting widgets controlled access to social features, data, and actions.

Permission-based routing for widget API access validates widget manifest permissions before routing requests to host-side handlers. It enforces authentication checks across feed, profiles, messaging, and storage interactions to guard against unauthorized access.

The Widget Protocol is a secure frontend-backend communication mechanism using window.postMessage. It defines how widgets request access to social APIs through manifest-based permissions, action routing, and robust error handling for host and widget interactions.

Manifest-based permissions restrict widget access to social features by requiring widgets to declare required permissions upfront. The host validates these permissions during authentication checks before enabling feed, profile, messaging, or storage handlers.

Real-time event subscriptions for widgets are handled through forwarders that deliver timely updates while respecting user permissions. The host-side event system routes updates to widgets only after validating manifest permissions and authentication status.

Widget API requests fail permission checks when the widget manifest lacks appropriate permissions for the targeted social APIs. The protocol enforces manifest-based permissions and authentication checks to guard against unauthorized access and misbehaving widgets.