Para crear un middleware usas el decorador `@app.middleware("http")` encima de una función.

La función middleware recibe:

* La `request`.
* Una función `call_next` que recibirá la `request` como parámetro.
    * Esta función pasará la `request` a la correspondiente *path operation*.
    * Luego devuelve la `response` generada por la correspondiente *path operation*.

 * users should prefer the {@link Network} interface.
 *
 * @author James Sexton
 * @author Joshua O'Madadhain
 * @param <N> Node parameter type
 * @param <E> Edge parameter type
 * @since 20.0
 */
@Beta
public interface MutableNetwork<N, E> extends Network<N, E> {

  /**
   * Adds {@code node} if it is not already present.
   *

 * which is in O(d_node) where d_node is the degree of {@code node}.
 *
 * @author James Sexton
 * @author Joshua O'Madadhain
 * @author Omar Darwish
 * @param <N> Node parameter type
 * @param <E> Edge parameter type
 */
final class StandardMutableNetwork<N, E> extends StandardNetwork<N, E>
    implements MutableNetwork<N, E> {

  /** Constructs a mutable graph with the properties specified in {@code builder}. */

            false, "keyword", 0, 0, null, null, false, null, null, null, null, null, false);
    protected final ColumnInfo _columnParameters = cci("parameters", "parameters", null, null, String.class, "parameters", null, false,
            false, false, "keyword", 0, 0, null, null, false, null, null, null, null, null, false);

import java.util.HashMap;
import java.util.Map;

import org.lastaflute.web.validation.Required;

import jakarta.validation.constraints.Size;

/**
 * Form class for thumbnail request parameters.
 * Contains the document ID and query parameters needed to retrieve thumbnail images.
 */
public class ThumbnailForm {

    /**
     * The document ID for which to retrieve the thumbnail.
     */
    @Required
    @Size(max = 100)

    String COOKIE_SEARCH_PARAMETER_KEYS = "cookie.search.parameter.keys";

    /** The key of the configuration. e.g. q */
    String COOKIE_SEARCH_PARAMETER_required_keys = "cookie.search.parameter.required_keys";

    /** The key of the configuration. e.g. 1000 */
    String COOKIE_SEARCH_PARAMETER_MAX_LENGTH = "cookie.search.parameter.max.length";

    /** The key of the configuration. e.g. fsrp */

# `Response` class

You can declare a parameter in a *path operation function* or dependency to be of type `Response` and then you can set data for the response like headers or cookies.

You can also use it directly to create an instance of it and return it from your *path operations*.

You can import it directly from `fastapi`:

```python
from fastapi import Response
```

        return "FileAuthentication [fileConfig=" + fileConfig + ", createdBy=" + createdBy + ", createdTime=" + createdTime
                + ", fileConfigId=" + fileConfigId + ", hostname=" + hostname + ", parameters=" + parameters + ", port=" + port
                + ", protocolScheme=" + protocolScheme + ", updatedBy=" + updatedBy + ", updatedTime=" + updatedTime + ", username="
                + username + ", docMeta=" + docMeta + "]";
    }

 *   <li>Access to the session context used during processing</li>
 *   <li>Correlation of results with their initiating parameters</li>
 * </ul>
 *
 * @param <REQ> the type of Request that produced this result, ensuring type-safe
 *              access to the original request parameters
 *
 * @see Request
 * @since 4.0.0
 */
@Experimental
@Immutable
public interface Result<REQ extends Request<?>> {

reading about how to structure bigger applications ([Bigger Applications - Multiple Files](../../tutorial/bigger-applications.md){.internal-link target=_blank}), possibly with multiple files, you will learn how to declare a single `dependencies` parameter for a group of *path operations*....