Implement catchable WebsocketClosed

Author: ahopkinsCreated Oct 3, 2021Updated Aug 1, 2026

Labelsintermediatefeature request

See #2220

In v21.9, a new WebsocketClosed exception was added.

While you can to do the following:

python

@app.websocker("/")
async def handler(request, ws):
    try:
        ...
    except asyncio.CancelledError:
        print("connection closed")

We would like to add support for this pattern:

python

@app.websocker("/")
async def handler(request, ws):
    try:
        ...
    except sanic.exceptions.WebsocketClosed:
        print("connection closed")

Source: sanic-org/sanic

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