`Header` has a little extra functionality on top of what `Path`, `Query` and `Cookie` provide.

Most of the standard headers are separated by a "hyphen" character, also known as the "minus symbol" (`-`).

But a variable like `user-agent` is invalid in Python.

So, by default, `Header` will convert the parameter names characters from underscore (`_`) to hyphen (`-`) to extract and document the headers.

 * This is not correct as it should do this with the built distribution instead.
 *
 * Doing it correctly would require running a Gradle build with the full
 * distribution and extracting the generated api jar from its Gradle user home,
 * slowing down building documentation.
 *
 * All this would be so much simpler if the Kotlin extensions to the Gradle API
 * were generated at build time instead.
 *

import org.codehaus.plexus.util.StringUtils;

/**
 * Determines profile activation based on the existence/absence of some file.
 * File name interpolation support is limited to <code>${project.basedir}</code>
 * system properties and user properties.
 *
 * @see ActivationFile
 * @see org.apache.maven.model.validation.DefaultModelValidator#validateRawModel
 * @deprecated use {@code org.apache.maven.api.services.ModelBuilder} instead
 */
@Named("file")

Mit `Form` haben Sie die gleichen Konfigurationsmöglichkeiten wie mit `Body` (und `Query`, `Path`, `Cookie`), inklusive Validierung, Beispielen, einem Alias (z. B. `user-name` statt `username`), usw.

/// info | Info

`Form` ist eine Klasse, die direkt von `Body` erbt.

///

/// tip | Tipp

///

## Інші middlewares

Ви можете пізніше прочитати більше про інші middlewares в [Advanced User Guide: Advanced Middleware](../advanced/middleware.md){.internal-link target=_blank}.

/**
 * Generates DSL reference material using Docbook and some homegrown class parsing.
 *
 * TODO: It would be nice to replace the Docbook portion of this with Asciidoc so that it could be
 * generated in the same way as the user manual with cross-links between them.
 */
public class GradleDslReferencePlugin implements Plugin<Project> {
    @Override
    public void apply(Project project) {
        ProjectLayout layout = project.getLayout();

        // location defined in TempTestKitDirProvider, copied here
        val testKitTmpDir = File(File(System.getProperty("java.io.tmpdir")), ".gradle-test-kit-${System.getProperty("user.name")}")
        fileSystemOperations.removeCachedScripts(File(testKitTmpDir, "caches"))
        fileSystemOperations.removeTransformDir(File(testKitTmpDir, "caches"))

Con `Form` puedes declarar las mismas configuraciones que con `Body` (y `Query`, `Path`, `Cookie`), incluyendo validación, ejemplos, un alias (por ejemplo, `user-name` en lugar de `username`), etc.

/// info | Información

`Form` es una clase que hereda directamente de `Body`.

///

/// tip | Consejo

With `Form` you can declare the same configurations as with `Body` (and `Query`, `Path`, `Cookie`), including validation, examples, an alias (e.g. `user-name` instead of `username`), etc.

/// info

`Form` is a class that inherits directly from `Body`.

///

/// tip

import java.util.List;
import java.util.Set;
import java.util.function.Predicate;
import java.util.stream.Stream;

import static java.util.stream.Collectors.toSet;

/**
 * Container for storing the request from the user to activate or deactivate certain projects and optionally fail the
 * build if those projects do not exist.
 */
public class ProjectActivation {

    /**
     * ProjectActivationSettings