}
    }

    private void disconnectWagon(Wagon wagon) {
        try {
            wagon.disconnect();
        } catch (ConnectionException e) {
            logger.error("Problem disconnecting from wagon - ignoring: " + e.getMessage());
        }
    }

    private void releaseWagon(String protocol, Wagon wagon) {
        try {
            container.release(wagon);

				if err := enc.Encode(prevResult); err != nil {
					return
				}
			} else {
				// first result is not yet obtained, keep writing
				// empty entry to prevent client from disconnecting.
				if err := enc.Encode(madmin.SpeedTestResult{}); err != nil {
					return
				}
			}
			w.(http.Flusher).Flush()
		case result, ok := <-ch:
			if !ok {
				return
			}

Notice that the query `token` will be handled by a dependency.

///

With that you can connect the WebSocket and then send and receive messages:

<img src="/img/tutorial/websockets/image05.png">

## Handling disconnections and multiple clients

When a WebSocket connection is closed, the `await websocket.receive_text()` will raise a `WebSocketDisconnect` exception, which you can then catch and handle like in this example.

	for {
		n, err := io.CopyN(xioutil.Discard, r.Body, 128*humanize.KiByte)
		atomic.AddUint64(&globalNetPerfRX.RX, uint64(n))
		if err != nil && err != io.EOF {
			// If there is a disconnection before globalNetPerfMinDuration (we give a margin of error of 1 sec)
			// would mean the network is not stable. Logging here will help in debugging network issues.

* Export `WebSocketDisconnect` and add example handling WebSocket disconnections to docs. PR [#1822](https://github.com/tiangolo/fastapi/pull/1822) by [@rkbeatss](https://github.com/rkbeatss).

### Breaking Changes

* Require Pydantic > `1.0.0`.