* `expose_headers` - 🎦 🙆 📨 🎚 👈 🔜 ⚒ ♿ 🖥. 🔢 `[]`.
* `max_age` - ⚒ 🔆 🕰 🥈 🖥 💾 ⚜ 📨. 🔢 `600`.

🛠️ 📨 2️⃣ 🎯 🆎 🇺🇸🔍 📨...

### ⚜ 🛫 📨

👉 🙆 `OPTIONS` 📨 ⏮️ `Origin` & `Access-Control-Request-Method` 🎚.

👉 💼 🛠️ 🔜 🆘 📨 📨 & 📨 ⏮️ ☑ ⚜ 🎚, & 👯‍♂️ `200` ⚖️ `400` 📨 🎓 🎯.

### 🙅 📨

🙆 📨 ⏮️ `Origin` 🎚. 👉 💼 🛠️ 🔜 🚶‍♀️ 📨 🔘 😐, ✋️ 🔜 🔌 ☑ ⚜ 🎚 🔛 📨.

## 🌅 ℹ

Na saída, temos:

```hl_lines="4"
INFO:     Uvicorn running on http://127.0.0.1:8000 (Press CTRL+C to quit)
```

Essa linha mostra a URL onde a sua aplicação está sendo servida, que nesse caso é a sua máquina local.

### Confira

Abra o seu navegador em <a href="http://127.0.0.1:8000" class="external-link" target="_blank">http://127.0.0.1:8000</a>.

Você verá essa resposta em JSON:

```JSON

Sonra kasiyeri/aşçı 👨‍🍳 nihayet hamburgerlerinizle 🍔, uzun bir süre sonra 🕙 tezgaha  geri geliyor.

Burgerlerinizi 🍔 al ve aşkınla masanıza doğru ilerle 😍.

Sadece burgerini yiyorsun 🍔 ve bitti ⏹.

As chaves do `dict` identificam cada exemplo, e cada valor é outro `dict`.

Cada `dict` de exemplo específico em `examples` pode conter:

* `summary`: Pequena descrição do exemplo.
* `description`: Uma descrição longa que pode conter texto em Markdown.
* `value`: O próprio exemplo mostrado, ex: um `dict`.

## Jalankan kode

Semua blok-blok kode dapat disalin dan digunakan langsung (Mereka semua sebenarnya adalah file python yang sudah teruji).

Untuk menjalankan setiap contoh, salin kode ke file `main.py`, dan jalankan `uvicorn` dengan:

<div class="termy">

```console
$ uvicorn main:app --reload

Você pode escrever <a href="https://en.wikipedia.org/wiki/Markdown" class="external-link" target="_blank">Markdown</a> na docstring, ele será interpretado e exibido corretamente (levando em conta a indentação da docstring).

=== "Python 3.8 and above"

    ```Python hl_lines="19-27"
    {!> ../../../docs_src/path_operation_configuration/tutorial004.py!}
    ```

=== "Python 3.9 and above"

    # Vocabularies for Semantic Content With "format"
    format: Optional[str] = None
    # Ref: JSON Schema Validation 2020-12: https://json-schema.org/draft/2020-12/json-schema-validation.html#name-a-vocabulary-for-the-conten
    # A Vocabulary for the Contents of String-Encoded Data
    contentEncoding: Optional[str] = None
    contentMediaType: Optional[str] = None
    contentSchema: Optional["SchemaOrBool"] = None

                    corresponding JSON. But if the data in the object returned is not
                    valid, that would mean a violation of the contract with the client,
                    so it's an error from the API developer. So, FastAPI will raise an
                    error and return a 500 error code (Internal Server Error).

For "synchronous" (contrary to "asynchronous") they commonly also use the term "sequential", because the computer / program follows all the steps in sequence before switching to a different task, even if those steps involve waiting.

### Concurrency and Burgers

Because the `SecurityScopes` will have all the scopes declared by dependants, you can use it to verify that a token has the required scopes in a central dependency function, and then declare different scope requirements in different *path operations*.

They will be checked independently for each *path operation*.

## Check it