O middleware responde a dois tipos específicos de solicitação HTTP...

### Requisições CORS pré-voo (preflight)

Estas são quaisquer solicitações `OPTIONS` com cabeçalhos `Origin` e `Access-Control-Request-Method`.

Nesse caso, o middleware interceptará a solicitação recebida e responderá com cabeçalhos CORS apropriados e uma resposta `200` ou `400` para fins informativos.

### Requisições Simples

All the same process that applied for path parameters also applies for query parameters:

* Editor support (obviously)
* Data <abbr title="converting the string that comes from an HTTP request into Python data">"parsing"</abbr>
* Data validation
* Automatic documentation

## Defaults

As query parameters are not a fixed part of a path, they can be optional and can have default values.

    private File userToolchainsFile;

    private File installationToolchainsFile;

    // ----------------------------------------------------------------------------
    // Request
    // ----------------------------------------------------------------------------

    private File multiModuleProjectDirectory;

    private File basedir;

    private Path rootDirectory;

        NtlmPasswordAuthenticator ntlmGuestCreds = guestCreds.unwrap(NtlmPasswordAuthenticator.class);
        assertThat("anonymous", ntlmGuestCreds.isAnonymous(), CoreMatchers.is(false));
        assertThat("guest", ntlmGuestCreds.isGuest(), CoreMatchers.is(true));

        Credentials anonCreds = this.context.withAnonymousCredentials().getCredentials();

                "e6cc9514d288fff4553187be8800b54efe3229054b1acbf64d3132e1982162576113939c790e8d6f56e2fa0d6655ba520c44ad0b71adc4061cf6b42e975b4904",
                crawlingInfoHelper.generateId(dataMap));

        roleTypeList.add("guest");

        assertEquals(
                "dce588fe68813d59cce9a5b087f81d63406123492cb120027ca9ed765ba6501f7b07bb36569afd2fb7b10ac53c4a9a3764b0d7619a8059c071b1a20f8ae42fa3",
                crawlingInfoHelper.generateId(dataMap));

// error returned in IAM subsystem when groups doesn't exist.
var errNoSuchGroup = errors.New("Specified group does not exist")

// error returned in IAM subsystem when a policy attach/detach request has no
// net effect, i.e. it is already applied.
var errNoPolicyToAttachOrDetach = errors.New("Specified policy update has no net effect")

// error returned in IAM subsystem when a non-empty group needs to be
// deleted.

    void injectAuthentication(RepositorySystemSession session, List<ArtifactRepository> repositories);

    ArtifactResolutionResult resolve(ArtifactResolutionRequest request);

    // Install

    // Deploy

    // Map types of artifacts

    //
    // Raw file transfers
    //
    void publish(

///

That would generate a `dict` with only the data that was set when creating the `item` model, excluding default values.

Then you can use this to generate a `dict` with only the data that was set (sent in the request), omitting default values:

//// tab | Python 3.10+

```Python hl_lines="32"
{!> ../../docs_src/body_updates/tutorial002_py310.py!}
```

////

//// tab | Python 3.9+

```Python hl_lines="34"

            basicAuthList.add(webAuth.getAuthentication());
        }
        paramMap.put(HcHttpClient.AUTHENTICATIONS_PROPERTY, basicAuthList.toArray(new Authentication[basicAuthList.size()]));

        // request header
        final List<RequestHeader> requestHeaderList = requestHeaderService.getRequestHeaderList(getId());
        final List<org.codelibs.fess.crawler.client.http.RequestHeader> rhList = new ArrayList<>();

	centralOpts.AttachControlPlaneFlags(debugCommand)
	debugCommand.Long += "\n\n" + util.ExperimentalMsg
	debugCommand.PersistentFlags().BoolVar(&internalDebugAllIstiod, "all", false,
		"Send the same request to all instances of Istiod. Only applicable for in-cluster deployment.")
	return debugCommand
}

var internalDebugAllIstiod bool

type DebugWriter struct {
	Writer                 io.Writer