Fetching Data

Sending a FETCH

FETCH retrieves historical objects from a track. Unlike SUBSCRIBE (which is a live stream), FETCH returns a bounded set of objects.

1. Enter the namespace and track name
2. Specify the range (start group/object to end group/object)
3. Click Fetch

The FETCH lifecycle

FETCH (sent) → FETCH_OK (received) → objects on fetch stream → stream closes

or:

FETCH (sent) → FETCH_ERROR (received)

Viewing fetched objects

Fetched objects arrive on a dedicated unidirectional stream (fetch header stream). moqtap displays them in order with their group/object IDs and payload content.

Cancelling a FETCH

Send FETCH_CANCEL to abort an in-progress fetch. The relay closes the fetch stream.

Note

Not all relays support FETCH. Check your relay’s documentation for supported features.