但在某些特定情况下，还是需要提取 `Request` 对象。

## 直接使用 `Request` 对象

假设要在*路径操作函数*中获取客户端 IP 地址和主机。

此时，需要直接访问请求。

{* ../../docs_src/using_request_directly/tutorial001.py hl[1,7:8] *}

把*路径操作函数*的参数类型声明为 `Request`，**FastAPI** 就能把 `Request` 传递到参数里。

/// tip | 提示

注意，本例除了声明请求参数之外，还声明了路径参数。

因此，能够提取、验证路径参数、并转换为指定类型，还可以用 OpenAPI 注释。

同样，您也可以正常声明其它参数，而且还可以提取 `Request`。

///

## `Request` 文档

**FastAPI** 将从请求中的**表单数据**中**提取**出**每个字段**的数据，并提供您定义的 Pydantic 模型。

## 检查文档

您可以在文档 UI 中验证它，地址为 `/docs` ：

<div class="screenshot">
<img src="/img/tutorial/request-form-models/image01.png">
</div>

## 禁止额外的表单字段

在某些特殊使用情况下（可能并不常见），您可能希望将表单字段**限制**为仅在 Pydantic 模型中声明过的字段，并**禁止**任何**额外**的字段。

/// note

自 FastAPI 版本 `0.114.0` 起支持此功能。🤓

///

///

## Documentação do `Request` { #request-documentation }

Você pode ler mais sobre os detalhes do objeto <a href="https://www.starlette.dev/requests/" class="external-link" target="_blank">`Request` no site da documentação oficial do Starlette.</a>.

/// note | Detalhes Técnicos

Você também pode utilizar `from starlette.requests import Request`.

## Confira os Documentos { #check-the-docs }

Você pode verificar na UI de documentação em `/docs`:

<div class="screenshot">
<img src="/img/tutorial/request-form-models/image01.png">
</div>

## Proibir Campos Extras de Formulários { #forbid-extra-form-fields }

        List<MetadataResult> results = repositorySystem.resolveMetadata(request.getRepositorySession(), requests);
        requests.clear();

        PluginPrefixResult result = processResults(request, trace, results, requests, candidates);

        if (result != null) {
            return result;
        }

        // second try, refetch all (possibly outdated) metadata that wasn't updated in the first attempt

    }

    /**
     * Gets the requested lease state flags
     * @return the requested lease state
     */
    public int getLeaseState() {
        return leaseState;
    }

    /**
     * Sets the requested lease state flags
     * @param leaseState the lease state to set
     */
    public void setLeaseState(int leaseState) {
        this.leaseState = leaseState;
    }

    /**

            try {
                ArtifactRequest request = new ArtifactRequest(pomArtifact, repositories, context);
                request.setTrace(trace);
                pomArtifact = resolver.resolveArtifact(session, request).getArtifact();
            } catch (ArtifactResolutionException e) {

    int DCERPC_CONC_MPX = 0x10; /* supports concurrent multiplexing */
    /**
     * Did not execute flag - indicates request was not executed
     */
    int DCERPC_DID_NOT_EXECUTE = 0x20;
    /**
     * Maybe flag - indicates 'maybe' call semantics requested
     */
    int DCERPC_MAYBE = 0x40; /* `maybe' call semantics requested */
    /**
     * Object UUID flag - if true, a non-nil object UUID is present
     */

 * governing permissions and limitations under the License.
 */
package org.codelibs.fess.exception;

/**
 * Exception thrown when an unsupported search operation is requested.
 * This exception indicates that the requested search functionality is not available or supported.
 */
public class UnsupportedSearchException extends FessSystemException {

    private static final long serialVersionUID = 1L;

    /**

        this.maxVersion = maxVersion;
    }

    /**
     * Get number of credits requested
     *
     * @return credits requested
     */
    public int getCreditsRequested() {
        return creditsRequested;
    }

    /**
     * Set number of credits requested
     *
     * @param creditsRequested credits to request
     */
    public void setCreditsRequested(int creditsRequested) {