* Se você nunca utilizou FastAPI mas utilizou diretamente o Starlette (ou outra ferramenta, como Sanic, Flask, Responder, etc) você teria que implementar toda validação de dados e serialização por conta. Então, sua aplicação final poderia ainda ter a mesma sobrecarga como se fosse desenvolvida com FastAPI. Em muitos casos, a validação de dados e serialização é o maior...

import org.codelibs.fess.app.web.api.admin.FessApiAdminAction;
import org.codelibs.fess.es.config.exentity.DuplicateHost;
import org.lastaflute.web.Execute;
import org.lastaflute.web.response.JsonResponse;

import jakarta.annotation.Resource;

/**
 * @author Keiichi Watanabe
 */
public class ApiAdminDuplicatehostAction extends FessApiAdminAction {

通过仅使用 `BackgroundTasks` (而不是 `BackgroundTask`)，使得能将它作为 *路径操作函数* 的参数 ，并让**FastAPI**为您处理其余部分, 就像直接使用 `Request` 对象。

在FastAPI中仍然可以单独使用 `BackgroundTask`，但您必须在代码中创建对象，并返回包含它的Starlette `Response`。

更多细节查看 <a href="https://www.starlette.io/background/" class="external-link" target="_blank">Starlette's official docs for Background Tasks</a>.

## 告诫

				"AWSAccessKeyId": accessKey,
			},
			expected: ErrSignatureDoesNotMatch,
		},
		// (6) Should not error signature matches with extra query params.
		{
			queryParams: map[string]string{
				"response-content-disposition": "attachment; filename=\"4K%2d4M.txt\"",
			},
			expected: ErrNone,
		},
		// (7) Should not error signature matches with no special query params.
		{
			queryParams: map[string]string{},

```

### Using WebIdentiy API

On another terminal run `web-identity.go` a sample client application which obtains JWT id_tokens from an identity provider, in our case its Keycloak. Uses the returned id_token response to get new temporary credentials from the MinIO server using the STS API call `AssumeRoleWithWebIdentity`.

```

    /**
    * Sent by the server in the Type 2 message to indicate that it is
    * including a Target Information block in the message.  The Target
    * Information block is used in the calculation of the NTLMv2 response.
    */
    public static final int NTLMSSP_NEGOTIATE_TARGET_INFO = 0x00800000;

    /**
    * Indicates that 128-bit encryption is supported.
    */

import org.codelibs.fess.app.web.api.admin.FessApiAdminAction;
import org.codelibs.fess.es.config.exentity.FileAuthentication;
import org.lastaflute.web.Execute;
import org.lastaflute.web.response.JsonResponse;

import jakarta.annotation.Resource;

/**
 * @author Keiichi Watanabe
 */
public class ApiAdminFileauthAction extends FessApiAdminAction {

}

// AuthNSuccessResponse - represents the response from the authentication plugin
// service.
type AuthNSuccessResponse struct {
	User               string                 `json:"user"`
	MaxValiditySeconds int                    `json:"maxValiditySeconds"`
	Claims             map[string]interface{} `json:"claims"`
}

// AuthNErrorResponse - represents an error response from the authN plugin.
type AuthNErrorResponse struct {

### Kiểm tra

Mở trình duyệt của bạn tại <a href="http://127.0.0.1:8000" class="external-link" target="_blank">http://127.0.0.1:8000</a>.

Bạn sẽ thấy một JSON response như:

```JSON
{"message": "Hello World"}
```

### Tài liệu tương tác API

Bây giờ tới <a href="http://127.0.0.1:8000/docs" class="external-link" target="_blank">http://127.0.0.1:8000/docs</a>.

				"X-Amz-SignedHeaders":   "host;x-amz-content-sha256;x-amz-date",
				"X-Amz-Credential":      fmt.Sprintf(credentialTemplate, accessKeyID, now.Format(yyyymmdd), region),
				"X-Amz-Content-Sha256":  payloadSHA256,
				"response-content-type": "application/json",
			},
			headers: map[string]string{
				"X-Amz-Date":           now.Format(iso8601Format),
				"X-Amz-Content-Sha256": payloadSHA256,
			},
			region:   "",