<div class="termy">

```console
$ pip install websockets

---> 100%
```

</div>

## WebSockets client { #websockets-client }

### In production { #in-production }

In your production system, you probably have a frontend created with a modern framework like React, Vue.js or Angular.

            await manager.send_personal_message(f"You wrote: {data}", websocket)
            await manager.broadcast(f"Client #{client_id} says: {data}")
    except WebSocketDisconnect:
        manager.disconnect(websocket)

    Create an invoice.

    This will (let's imagine) let the API user (some external developer) create an
    invoice.

    And this path operation will:

    * Send the invoice to the client.
    * Collect the money from the client.
    * Send a notification back to the API user (the external developer), as a callback.
        * At this point is that the API will somehow send a POST request to the

		m.status = update.status
	}

	if m.status == scanStateStarted && time.Since(m.lastHandout) > metacacheMaxClientWait {
		// Drop if client hasn't been seen for 3 minutes.
		m.status = scanStateError
		m.error = "client not seen"
	}

	if m.error == "" && update.error != "" {
		m.error = update.error
		m.status = scanStateError
		m.ended = now
	}

	if !dryRun {
		if globalIsDistErasure {
			ng := WithNPeers(len(globalNotificationSys.peerClients))
			for idx, client := range globalNotificationSys.peerClients {
				if failedClients[idx] {
					continue
				}
				client := client
				ng.Go(ctx, func() error {
					return client.CommitBinary(ctx)
				}, idx, *client.host)
			}

			for _, nerr := range ng.Wait() {
				if nerr.Err != nil {

	// Create special flag to force create a bucket
	MinIOForceCreate = "x-minio-force-create"

	// Header indicates if the mtime should be preserved by client
	MinIOSourceMTime = "x-minio-source-mtime"

	// Header indicates if the etag should be preserved by client
	MinIOSourceETag = "x-minio-source-etag"

	// Writes expected write quorum
	MinIOWriteQuorum = "x-minio-write-quorum"

	// Reads expected read quorum

Eine „Middleware“ ist eine Funktion, die mit jedem **<abbr title="Request – Anfrage: Daten, die der Client zum Server sendet">Request</abbr>** arbeitet, bevor er von einer bestimmten *Pfadoperation* verarbeitet wird. Und auch mit jeder **<abbr title="Response – Antwort: Daten, die der Server zum anfragenden Client zurücksendet">Response</abbr>**, bevor sie zurückgegeben wird.

		case "v1", madmin.AdminAPIVersionV2:
			desc = fmt.Sprintf("Server expects client requests with 'admin' API version '%s', found '%s', please upgrade the client to latest releases", madmin.AdminAPIVersion, version)
		case madmin.AdminAPIVersion:
			desc = fmt.Sprintf("This 'admin' API is not supported by server in '%s'", getMinioMode())
		default:

*-----------------------+---------------+------------+-----------+-----------------------+-----------------------+
| <<<ejb-client>>>      | <<<client>>>  | <<<jar>>>  | java      | classes               |                       |
*-----------------------+---------------+------------+-----------+-----------------------+-----------------------+

        ),
        pytest.param(
            "/required-alias-and-validation-alias",
            id="required-alias-and-validation-alias",
        ),
    ],
)
def test_success(path: str):
    client = TestClient(app)
    response = client.get(f"{path}/hello")
    assert response.status_code == 200, response.text