ducoterra
555fc1c3b4
A FastAPI server with two pages and one WebSocket. /mirror captures a window, screen or tab through the OS-native getDisplayMedia picker; /watch shows every live mirror as a wall and takes one fullscreen on click. Any number of sharers and watchers, at the same time. Media never touches the server: each watcher gets its own RTCPeerConnection to the sharer, and the Python process only relays JSON. The roster lives in registry.py, which is transport-free by design -- every operation returns the envelopes to deliver, so admission, fan-out and teardown policy are all unit-testable without a socket. Registry rules worth stating: a signal frame is relayed only along an existing subscription in either direction; viewer-to-peer traffic is refused; and teardown is broadcast to every viewer rather than only the subscribers, because a tile is drawn on stream_added and a viewer that has not yet subscribed still has a stale tile to clear. Frontend is hand-written ES modules with no build step and no external asset. Chromium scales a monitor capture to the capturing window and requires a secure context, so /mirror detects an insecure origin and prints the three ways out rather than failing on a button click. LLM-Generated: true