![Interceptors Diagram](../assets/images/******@****.***)

### Application Interceptors

Interceptors are registered as either _application_ or _network_ interceptors. We'll use the `LoggingInterceptor` defined above to show the difference.

Register an _application_ interceptor by calling `addInterceptor()` on `OkHttpClient.Builder`:

```java
OkHttpClient client = new OkHttpClient.Builder()
    .addInterceptor(new LoggingInterceptor())

So, what we will do next is add the code to document how that *external API* should look like to receive the callback from *your API*.

That documentation will show up in the Swagger UI at `/docs` in your API, and it will let external developers know how to build the *external API*.

</div>
{% endif %}

I'm the creator of **FastAPI**. You can read more about that in [Help FastAPI - Get Help - Connect with the author](help-fastapi.md#connect-with-the-author){.internal-link target=_blank}.

...But here I want to show you the community.

---

**FastAPI** receives a lot of support from the community. And I want to highlight their contributions.

These are the people that:

     */
    String getMailSmtpServerMainHostAndPort();

    /**
     * Get the value for the key 'mail.subject.test.prefix'. <br>
     * The value is, e.g. [Test] <br>
     * comment: The prefix of subject to show test environment or not
     * @return The value of found property. (NotNull: if not found, exception but basically no way)
     */
    String getMailSubjectTestPrefix();

    /**

			continue
		}

		// For safety, check the containers *current* status. If the container
		// successfully exited, we NEVER want to identify this pod as broken.
		// If the pod is going to fail, the failure state will show up in
		// LastTerminationState eventually.
		if state := container.State.Terminated; state != nil {
			if state.Reason == "Completed" || state.ExitCode == 0 {
				continue
			}
		}

And the spec says that the fields have to be named like that. So `user-name` or `email` wouldn't work.

But don't worry, you can show it as you wish to your final users in the frontend.

And your database models can use any other names you want.

  override fun toString(): String = path.joinToString(separator = " / ")

  companion object {
    /**
     * A synthetic value that indicates there's no more bytes. Values with equivalent data may also
     * show up in ASN.1 streams to also indicate the end of SEQUENCE, SET or other constructed
     * value.
     */
    private val END_OF_DATA =
      DerHeader(
        tagClass = DerHeader.TAG_CLASS_UNIVERSAL,

But once you know the basic information of **HTTPS for developers** you can easily combine and configure different tools to help you manage everything in a simple way.

```Python hl_lines="16"
{!../../docs_src/path_params/tutorial005.py!}
```

### Check the docs

Because the available values for the *path parameter* are predefined, the interactive docs can show them nicely:

<img src="/img/tutorial/path-params/image03.png">

### Working with Python *enumerations*

The value of the *path parameter* will be an *enumeration member*.

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