### Generate a TypeScript Client with Tags { #generate-a-typescript-client-with-tags }

If you generate a client for a FastAPI app using tags, it will normally also separate the client code based on the tags.

This way, you will be able to have things ordered and grouped correctly for the client code:

<img src="/img/tutorial/generate-clients/image06.png">

In this case, you have:

    ```java
      /**
       * The imgur client ID for OkHttp recipes. If you're using imgur for anything other than running
       * these examples, please request your own client ID! https://api.imgur.com/oauth2
       */
      private static final String IMGUR_CLIENT_ID = "...";
      private static final MediaType MEDIA_TYPE_PNG = MediaType.parse("image/png");

      private final OkHttpClient client = new OkHttpClient();

    .build();
```

Client Authentication
---------------------

The above scenario is representative of most TLS set ups: the client uses certificates to validate
the identity of a server. The converse is also possible. Here we create a server that authenticates
a client and a client that authenticates a server.

```java
// Create the root for client and server to trust. We could also use different roots for each!

### Client Binaries

filename | sha512 hash
-------- | -----------
[kubernetes-client-darwin-amd64.tar.gz](https://dl.k8s.io/v1.32.13/kubernetes-client-darwin-amd64.tar.gz) | 2c038815b7e589381d0581f533c2ec3bd2024549923518ad7335a1d37bedecce6982246932f58097b3cb30554683e6ffdddb155e3a16608e0854fafc70d6061e

                return Collections.emptyList();
            }
        };
        ComponentUtil.register(client, "searchEngineClient");
        final DocList docList = new DocList();
        indexingHelper.sendDocuments(client, docList);
        assertEquals(0, docList.size());
        assertEquals(0, sentDocList.size());
        assertNull(sentIndex.get());

    App->>Client: Send Item 2
    App->>App: Produce Item 3
    Client->>Client: Process Item 2
    App->>Client: Send Item 3
    Client->>Client: Process Item 3
    Note over App: Keeps producing...
    Note over Client: Keeps consuming...
```

It could even be an infinite stream, where you keep sending data.

## JSON Lines { #json-lines }

        "type": "object",
    }


def test_optional_list_str_missing():
    client = TestClient(app)
    response = client.post("/optional-list-str")
    assert response.status_code == 200, response.text
    assert response.json() == {"p": None}


def test_model_optional_list_str_missing():
    client = TestClient(app)
    response = client.post("/model-optional-list-str")
    assert response.status_code == 422, response.text

### Client Binaries

filename | sha512 hash
-------- | -----------
[kubernetes-client-darwin-amd64.tar.gz](https://dl.k8s.io/v1.33.10/kubernetes-client-darwin-amd64.tar.gz) | 3c253e852a007f4c5a7c4d01eda3ee18e29de72e08b3c53fc398ddb0432f82dee598c9212c3ff0c631eba7ef2de30b75d997d3ee0ed612f80f03b15bd7ca7b3f

)
def test_optional_str_missing(path: str):
    client = TestClient(app)
    response = client.post(path)
    assert response.status_code == 200
    assert response.json() == {"p": None}


@pytest.mark.parametrize(
    "path",
    ["/optional-str", "/model-optional-str"],
)
def test_optional_str(path: str):
    client = TestClient(app)
    response = client.post(path, data={"p": "hello"})

    ],
)
def test_optional_missing(path: str):
    client = TestClient(app)
    response = client.post(path)
    assert response.status_code == 200, response.text
    assert response.json() == {"file_size": None}


@pytest.mark.parametrize(
    "path",
    [
        "/optional-bytes",
        "/optional-uploadfile",
    ],
)
def test_optional(path: str):
    client = TestClient(app)