# 교차 출처 리소스 공유

<a href="https://developer.mozilla.org/en-US/docs/Web/HTTP/CORS" class="external-link" target="_blank">CORS 또는 "교차-출처 리소스 공유"</a>란, 브라우저에서 동작하는 프론트엔드가 자바스크립트로 코드로 백엔드와 통신하고, 백엔드는 해당 프론트엔드와 다른 "출처"에 존재하는 상황을 의미합니다.

## 출처

출처란 프로토콜(`http` , `https`), 도메인(`myapp.com`, `localhost`, `localhost.tiangolo.com` ), 그리고 포트(`80`, `443`, `8080` )의 조합을 의미합니다.

따라서, 아래는 모두 상이한 출처입니다:

* `http://localhost`
* `https://localhost`

 <font color="#4E9A06">│  Serving at: http://0.0.0.0:8000                    │</font>
 <font color="#4E9A06">│                                                     │</font>
 <font color="#4E9A06">│  API docs: http://0.0.0.0:8000/docs                 │</font>
 <font color="#4E9A06">│                                                     │</font>
 <font color="#4E9A06">│  Running in production mode, for development use:   │</font>

```Python hl_lines="6"
{!../../docs_src/python_types/tutorial010.py!}
```

И снова вы получаете полную поддержку редактора:

<img src="/img/python-types/image06.png">

## Pydantic-модели

<a href="https://docs.pydantic.dev/" class="external-link" target="_blank">Pydantic</a> является Python-библиотекой для выполнения валидации данных.

Вы объявляете «форму» данных как классы с атрибутами.

И каждый атрибут имеет тип.

, 📤 5️⃣📆 🧰 👈 ⌛ & ⚙️ ⚫️ (🔜 ⚖️ 🔮) & 👈 💪 ⚠ 👆 ⚖️ 👆 👩‍💻, 🔜 ⚖️ 🔮.

👈 💰 🐩...

///

## 👀 ⚫️ 🎯

📂 🎓 🩺: <a href="http://127.0.0.1:8000/docs" class="external-link" target="_blank">http://127.0.0.1:8000/docs</a>.

### 🔓

🖊 "✔" 🔼.

⚙️ 🎓:

👩‍💻: `johndoe`

🔐: `secret`

<img src="/img/tutorial/security/image04.png">

⏮️ 🔗 ⚙️, 👆 🔜 👀 ⚫️ 💖:

////

В данном примере она преобразует Pydantic модель в `dict`, а `datetime` - в `str`.

Результатом её вызова является объект, который может быть закодирован с помощью функции из стандартной библиотеки Python – <a href="https://docs.python.org/3/library/json.html#json.dumps" class="external-link" target="_blank">`json.dumps()`</a>.

### Contributor Checklist
- [ ] [Review Contribution Guidelines](https://github.com/gradle/gradle/blob/master/CONTRIBUTING.md).
- [ ] Make sure that all commits are [signed off](https://git-scm.com/docs/git-commit#Documentation/git-commit.txt---signoff) to indicate that you agree to the terms of [Developer Certificate of Origin](https://developercertificate.org/).

 * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
 * See the License for the specific language governing permissions and
 * limitations under the License.
 */
package gradlebuild.docs.dsl.source.model;

import org.gradle.api.Action;

import java.io.Serializable;
import java.util.Objects;

/**
 * Static meta-data about a method parameter extracted from the source for the method.
 */

```console
$ OPENAPI_URL= uvicorn main:app

<span style="color: green;">INFO</span>:     Uvicorn running on http://127.0.0.1:8000 (Press CTRL+C to quit)
```

</div>

⤴️ 🚥 👆 🚶 📛 `/openapi.json`, `/docs`, ⚖️ `/redoc` 👆 🔜 🤚 `404 Not Found` ❌ 💖:

```JSON
{
    "detail": "Not Found"
}

///

## Add extra information

You can declare extra information in `Field`, `Query`, `Body`, etc. And it will be included in the generated JSON Schema.

You will learn more about adding extra information later in the docs, when learning to declare examples.

/// warning

Extra keys passed to `Field` will also be present in the resulting OpenAPI schema for your application.

 * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
 * See the License for the specific language governing permissions and
 * limitations under the License.
 */
package gradlebuild.docs.dsl.source.model

import spock.lang.Specification

class PropertyMetaDataTest extends Specification {
    final ClassMetaData classMetaData = Mock()