* E.g., `await myfile.seek(0)` would go to the start of the file.
    * This is especially useful if you run `await myfile.read()` once and then need to read the contents again.
* `close()`: Closes the file.

As all these methods are `async` methods, you need to "await" them.

For example, inside of an `async` *path operation function* you can get the contents with:

```Python

	}
}

func (m *muxServer) unblockSend(seq uint32) {
	if !m.checkSeq(seq) {
		return
	}
	m.recvMu.Lock()
	defer m.recvMu.Unlock()
	if m.outBlock == nil {
		// Closed
		return
	}
	select {
	case m.outBlock <- struct{}{}:
	default:
		gridLogIf(m.ctx, errors.New("output unblocked overflow"))
	}
}

func (m *muxServer) ping(seq uint32) pongMsg {

> certs from the server certificate chain, this is mainly to add simplicity of setup. However if you wish to terminate
> TLS certificates via a different domain for your FTP servers you may choose the above command line options.


### Custom Algorithms (SFTP)

Custom algorithms can be specified via command line parameters.
Algorithms are comma separated. 

package org.gradle.test

import org.gradle.test.sub.*;

class GroovyClassWithImports extends SubGroovyClass implements SubJavaInterface, GroovyInterface {
    void close() {
    }
}

              throw new IllegalStateException("More than one source open");
            }
            return new FilterInputStream(source.openStream()) {
              @Override
              public void close() throws IOException {
                super.close();
                counter[0]--;
              }
            };
          }
        };
    byte[] result = ByteSource.concat(checker, checker, checker).read();

			if err != nil {
				errs[idx] = err
				return
			}

			reader := NewPutObjReader(hr)
			defer func() {
				if err := reader.Close(); err != nil {
					errs[idx] = err
				}
				if err := hr.Close(); err != nil {
					errs[idx] = err
				}
			}()

			userDefined := make(map[string]string, len(req.UserMetadata))
			for k, v := range req.UserMetadata {
				userDefined[k] = v

	if err != nil {
		log.Fatalln(err)
	}

	zipFile, err := os.Create("format.json.zip")
	if err != nil {
		log.Fatalf("failed to create format.json.zip: %v", err)
	}
	defer zipFile.Close()
	fmtZipW := zip.NewWriter(zipFile)
	defer fmtZipW.Close()
	for _, pool := range pools { // for each pool
		setCount, setDriveCount := pool.SetCount, pool.DrivesPerSet
		format := newFormatErasureV3(setCount, setDriveCount)
		format.ID = deploymentID

         "type": "row"
      },
      {
         "datasource": {
            "type": "datasource",
            "uid": "-- Mixed --"
         },
         "description": "Connections opened and closed per instance",
         "fieldConfig": {
            "defaults": {
               "custom": {
                  "fillOpacity": 10,
                  "gradientMode": "hue",
                  "showPoints": "never"

OSMM+vkKUTCvQs9YL/CVMIMt43HFhkUpqJxTmGl6rYw=
```

Now, you can set `MINIO_KMS_SECRET_KEY` like this:

```sh
export MINIO_KMS_SECRET_KEY=my-minio-key:OSMM+vkKUTCvQs9YL/CVMIMt43HFhkUpqJxTmGl6rYw=
```

> You can choose an arbitrary name for the key - instead of `my-minio-key`.
> Please note that losing the `MINIO_KMS_SECRET_KEY` will cause data loss
> since you will not be able to decrypt the IAM/configuration data anymore.

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.

//// tab | Python 3.9+

```Python hl_lines="79-81"