# Response Headers

## Use a `Response` parameter

You can declare a parameter of type `Response` in your *path operation function* (as you can do for cookies).

And then you can set headers in that *temporal* response object.

```Python hl_lines="1  7-8"
{!../../../docs_src/response_headers/tutorial002.py!}
```

And then you can return any object you need, as you normally would (a `dict`, a database model, etc).

        }

    override val parameter: KtValueParameterSymbol
        get() = withValidityAssertion {
            val parameter = psi.parameter
            return if (parameter != null) {
                KtFe10PsiValueParameterSymbol(parameter, analysisContext)
            } else {
                KtFe10PsiDefaultSetterParameterSymbol(psi, analysisContext)

# `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

Dieser Teil ist ziemlich normal, der größte Teil des Codes ist Ihnen wahrscheinlich bereits bekannt:

```Python hl_lines="9-13  36-53"
{!../../../docs_src/openapi_callbacks/tutorial001.py!}
```

!!! tip "Tipp"

   *
   */
  public static Escaper urlFormParameterEscaper() {
    return URL_FORM_PARAMETER_ESCAPER;
  }

  private static final Escaper URL_FORM_PARAMETER_ESCAPER =
      new PercentEscaper(URL_FORM_PARAMETER_OTHER_SAFE_CHARS, true);

  /**
   * Returns an {@link Escaper} instance that escapes strings so they can be safely included in <a

# Header-Parameter

So wie `Query`-, `Path`-, und `Cookie`-Parameter können Sie auch <abbr title='Header – Kopfzeilen, Header, Header-Felder: Schlüssel-Wert-Metadaten, die vom Client beim Request, und vom Server bei der Response gesendet werden'>Header</abbr>-Parameter definieren.

## `Header` importieren

Importieren Sie zuerst `Header`:

=== "Python 3.10+"

    ```Python hl_lines="3"
    {!> ../../../docs_src/header_params/tutorial001_an_py310.py!}

     *             installation has failed.
     * @throws IllegalArgumentException in case of parameter {@code request} is {@code null} or parameter
     *             {@code localRepository} is {@code null} or {@code localRepository} is not a directory
     *             or parameter {@code mavenArtifacts} is {@code null} or
     *             {@code mavenArtifacts.isEmpty()} is {@code true}.
     */

If you pass a "callable" as a dependency in **FastAPI**, it will analyze the parameters for that "callable", and process them in the same way as the parameters for a *path operation function*. Including sub-dependencies.

That also applies to callables with no parameters at all. The same as it would be for *path operation functions* with no parameters.

# Pfadoperation-Konfiguration

Es gibt mehrere Konfigurations-Parameter, die Sie Ihrem *Pfadoperation-Dekorator* übergeben können.

!!! warning "Achtung"
    Beachten Sie, dass diese Parameter direkt dem *Pfadoperation-Dekorator* übergeben werden, nicht der *Pfadoperation-Funktion*.

## Response-Statuscode

Sie können den (HTTP-)`status_code` definieren, den die Response Ihrer *Pfadoperation* verwenden soll.

        setParameterName_Terms("parameter_name", opLambda, null);
    }

    public void setParameterName_Terms(ConditionOptionCall<TermsAggregationBuilder> opLambda, OperatorCall<BsAccessTokenCA> aggsLambda) {
        setParameterName_Terms("parameter_name", opLambda, aggsLambda);
    }