}

    /**
     * Add a header with the specified name and value. Does validation of header names and values.
     */
    fun add(
      name: String,
      value: String,
    ) = commonAdd(name, value)

    /**
     * Add a header with the specified name and value. Does validation of header names, allowing
     * non-ASCII values.
     */
    fun addUnsafeNonAscii(

Nhưng mặc định, tất cả **đều hoạt động**.

### Validation

* Validation cho đa số (hoặc tất cả?) **các kiểu dữ liệu** Python, bao gồm:
    * JSON objects (`dict`).
    * Mảng JSON (`list`) định nghĩa kiểu dữ liệu từng phần tử.
    * Xâu (`str`), định nghĩa độ dài lớn nhất, nhỏ nhất.
    * Số (`int`, `float`) với các giá trị lớn nhất, nhỏ nhất, etc.

* Validation cho nhiều kiểu dữ liệu bên ngoài như:
    * URL.

        - ""
        - -b
        - '*'
        - -d
        - 15090,15021,15020
        - --log_output_level=default:info
        - --run-validation
        - --skip-rule-apply
        image: gcr.io/istio-testing/proxyv2:latest
        name: istio-validation
        resources:
          limits:
            cpu: "2"
            memory: 1Gi
          requests:
            cpu: 100m

!!! check
    So, with the same Python type declaration, **FastAPI** gives you data validation.

    Notice that the error also clearly states exactly the point where the validation didn't pass.

    This is incredibly helpful while developing and debugging code that interacts with your API.

## Documentation

!!! check "vérifier"
    Donc, avec ces mêmes déclarations de type Python, **FastAPI** vous fournit de la validation de données.

    Notez que l'erreur mentionne le point exact où la validation n'a pas réussi.

    Ce qui est incroyablement utile au moment de développer et débugger du code qui interagit avec votre API.

## Documentation

# `Request` class

You can declare a parameter in a *path operation function* or dependency to be of type `Request` and then you can access the raw request object directly, without any validation, etc.

You can import it directly from `fastapi`:

```python
from fastapi import Request
```

!!! tip

# Body – Felder

So wie Sie zusätzliche Validation und Metadaten in Parametern der **Pfadoperation-Funktion** mittels `Query`, `Path` und `Body` deklarieren, können Sie auch innerhalb von Pydantic-Modellen zusätzliche Validation und Metadaten deklarieren, mittels Pydantics `Field`.

## `Field` importieren

Importieren Sie es zuerst:

=== "Python 3.10+"

    ```Python hl_lines="4"
    {!> ../../../docs_src/body_fields/tutorial001_an_py310.py!}
    ```

dependencies {
    implementation(enforcedPlatform("org.junit:junit-bom:5.7.1"))
}

// tag::disable_validation[]
tasks.withType<GenerateModuleMetadata> {
    // The value 'enforced-platform' is provided in the validation
    // error message you got
    suppressedValidationErrors.add("enforced-platform")
}

  @get:JvmName("noCache") val noCache: Boolean,
  /** If true, this response should not be cached. */
  @get:JvmName("noStore") val noStore: Boolean,
  /** The duration past the response's served date that it can be served without validation. */
  @get:JvmName("maxAgeSeconds") val maxAgeSeconds: Int,
  /**
   * The "s-maxage" directive is the max age for shared caches. Not to be confused with "max-age"

                .add(pluginJar)
        } else {
            Logging.getLogger(javaClass).warn("Validation won't be performed for plugin '{}' because we couldn't locate its jar file", pluginId)
        }
    }
}