/**
     * @return true if the <b>debug</b> error level is enabled
     */
    boolean isDebugEnabled();

    /**
     * Send a message to the user in the <b>debug</b> error level.
     *
     * @param content
     */
    void debug(CharSequence content);

    /**
     * Send a message (and accompanying exception) to the user in the <b>debug</b> error level.<br>

///

## Await for messages and send messages

In your WebSocket route you can `await` for messages and send messages.

```Python hl_lines="48-52"
{!../../docs_src/websockets/tutorial001.py!}
```

You can receive and send binary, text, and JSON data.

## Try it

If your file is named `main.py`, run your application with:

}

func (target *MQTTTarget) isActive() (bool, error) {
	if !target.client.IsConnectionOpen() {
		return false, store.ErrNotConnected
	}
	return true, nil
}

// send - sends an event to the mqtt.
func (target *MQTTTarget) send(eventData event.Event) error {
	objectName, err := url.QueryUnescape(eventData.S3.Object.Key)
	if err != nil {
		return err
	}
	key := eventData.S3.Bucket.Name + "/" + objectName

This is normally called a **webhook**.

## Webhooks steps

The process normally is that **you define** in your code what is the message that you will send, the **body of the request**.

You also define in some way at which **moments** your app will send those requests or events.

	// assign the new webhook target to this field.
	// The Send() method will then re-direct entries
	// to the new target when the current one
	// has been set to status "statusClosed".
	// Once the glogal target slice has been migrated
	// the current target will stop receiving entries.
	migrateTarget *Target

	// Number of events per HTTP send to webhook target
	// this is ideally useful only if your endpoint can

		h.logEntry(entry)
	}
}

func (h *Target) logEntry(entry interface{}) {
	atomic.AddInt64(&h.totalMessages, 1)
	if err := h.send(entry); err != nil {
		atomic.AddInt64(&h.failedMessages, 1)
		h.kconfig.LogOnce(context.Background(), err, h.kconfig.Topic)
	}
}

func (h *Target) send(entry interface{}) error {
	if err := h.initKafkaOnce.Do(h.init); err != nil {
		return err
	}
	logJSON, err := json.Marshal(&entry)

		auditEntry := GetAuditEntry(ctx)
		if auditEntry != nil {
			entry = *auditEntry
		}
	}

	// Send audit logs only to http targets.
	for _, t := range auditTgts {
		if err := t.Send(ctx, entry); err != nil {
			LogOnceIf(ctx, "logging", fmt.Errorf("Unable to send audit event(s) to the target `%v`: %v", t, err), "send-audit-event-failure")
		}
	}

When you need to send data from a client (let's say, a browser) to your API, you send it as a **request body**.

A **request** body is data sent by the client to your API. A **response** body is the data your API sends to the client.

Your API almost always has to send a **response** body. But clients don't necessarily need to send **request bodies** all the time, sometimes they only request a path, maybe with some query parameters, but don't send a body.

							bucket, version.Name, err))
					}
				}

				if !send(result) {
					return
				}
			}

			// All versions resulted in 'ObjectNotFound/VersionNotFound'
			if versionNotFound == len(fivs.Versions) {
				return
			}

			send(healEntryDone(entry.name))

			// Wait and proceed if there are active requests
			waitForLowHTTPReq()
		}

///

```Python hl_lines="10"
{!> ../../docs_src/header_param_models/tutorial002.py!}
```

////

If a client tries to send some **extra headers**, they will receive an **error** response.

For example, if the client tries to send a `tool` header with a value of `plumbus`, they will receive an **error** response telling them that the header parameter `tool` is not allowed:

```json
{