///

Luego, podemos pasar más parámetros a `Query`. En este caso, el parámetro `max_length` que se aplica a los strings:

```Python
q: Union[str, None] = Query(default=None, max_length=50)
```

Esto validará los datos, mostrará un error claro cuando los datos no sean válidos, y documentará el parámetro en el esquema del *path operation* de OpenaPI.

## API Request Parameters

### Version

            if (matcher.matches()) {
                return entry.getValue();
            }
        }
        return null;
    }

    /**
     * Sets the initialization parameter map for all clients.
     * @param params The map of parameters.
     */
    public void setInitParameterMap(final Map<String, Object> params) {
        if (params != null) {
            for (final CrawlerClient client : clientMap.values()) {

	Nesse caso, **FastAPI** também fornece as ferramentas para construir.

Quando nós criamos uma instância da classe `OAuth2PasswordBearer`, nós passamos pelo parâmetro `tokenUrl` Esse parâmetro contém a URL que o client (o frontend rodando no browser do usuário) vai usar para mandar o `username` e `senha` para obter um token.

{* ../../docs_src/security/tutorial001.py hl[6] *}

/// tip | Dica

        /**
         * Gets the initialization parameter value for the given parameter name.
         *
         * This method maps SPNEGO configuration parameter names to their corresponding
         * values from system properties or default values. It handles various
         * authentication and security settings for SPNEGO.
         *
         * @param name The name of the initialization parameter

        TypeToken<?> paramType = type.resolveType(typeVars[i]);
        // We require all @Generates methods to either be parameter-less or accept non-null
        // values for their generic parameter types.
        Object argValue = generate(paramType);
        if (argValue == null) {
          // When a parameter of a @Generates method cannot be created,
          // The type most likely is a collection.

labels.boost=Boost
labels.crawlingConfigName=Name
labels.crawlingConfigPath=Path to Crawl
labels.processType=Process Type
labels.parameters=Parameters
labels.designFile=File to Upload
labels.bulkFile=Bulk File
labels.appendQueryParameter=Append Search Parameters
labels.configId=Config ID
labels.configParameter=Config Parameter
labels.content=Content
labels.csvFileEncoding=CSV Encoding
labels.defaultLabelValue=Default Label

/**
 * Action class for handling help page requests in the Fess search application.
 * This class extends FessSearchAction to provide help functionality including
 * authentication checks and form parameter setup for the help interface.
 */
public class HelpAction extends FessSearchAction {

    // ===================================================================================

        networkExplorer = createMockedNetworkExplorer(true, "jCIFS");

        // Override init to capture parameter calls
        networkExplorer = new NetworkExplorer() {
            @Override
            public void init(ServletConfig config) throws ServletException {
                // Read the parameters to trigger verification
                config.getInitParameter("jcifs.smb.client.domain");

## Beispiel

Hier ist ein Beispiel für eine *Pfadoperation* mit Parametern, die einige der oben genannten Typen verwenden.

{* ../../docs_src/extra_data_types/tutorial001_an_py310.py hl[1,3,12:16] *}

Beachten Sie, dass die Parameter innerhalb der Funktion ihren natürlichen Datentyp haben und Sie beispielsweise normale Datumsmanipulationen durchführen können, wie zum Beispiel: