FastAPI provides several tools for each of these security schemes in the `fastapi.security` module that simplify using these security mechanisms.

In the next chapters you will see how to add security to your API using those tools provided by **FastAPI**.

   *
   * @deprecated This property was <a
   *     href="https://openjdk.java.net/jeps/220#Removed:-The-extension-mechanism">deprecated</a> in
   *     Java 8 and removed in Java 9. We do not plan to remove this API from Guava, but if you are
   *     using it, it is probably not doing what you want.
   */
  @Deprecated
  JAVA_EXT_DIRS("java.ext.dirs"),

  /** Operating system name. */
  OS_NAME("os.name"),

 * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND,
 * either express or implied. See the License for the specific language
 * governing permissions and limitations under the License.
 */
package org.codelibs.fess.api.json;

import static org.codelibs.core.stream.StreamUtil.stream;

import java.io.IOException;
import java.io.PrintWriter;
import java.io.StringWriter;
import java.net.URLDecoder;
import java.text.SimpleDateFormat;

	discovery "github.com/envoyproxy/go-control-plane/envoy/service/discovery/v3"
	xdsstatus "github.com/envoyproxy/go-control-plane/envoy/service/status/v3"
	"google.golang.org/grpc"
	v1 "k8s.io/api/core/v1"
	metav1 "k8s.io/apimachinery/pkg/apis/meta/v1"

	"istio.io/api/label"
	"istio.io/istio/istioctl/pkg/clioptions"
	"istio.io/istio/istioctl/pkg/xds"
	pilotxds "istio.io/istio/pilot/pkg/xds"
	"istio.io/istio/pkg/kube"

 *
 * <p>Listeners are registered once via {@link #addListener} and then may be invoked by {@linkplain
 * #enqueue enqueueing} and then {@linkplain #dispatch dispatching} events.
 *
 * <p>The API of this class is designed to make it easy to achieve the following properties
 *
 * <ul>
 *   <li>Multiple events for the same listener are never dispatched concurrently.

////

//// tab | Python 3.8+ non-Annotated

/// tip

尽可能选择使用 `Annotated` 的版本。

///

```Python hl_lines="2  6  10"
{!> ../../docs_src/security/tutorial006.py!}
```

////

第一次打开 URL（或在 API 文档中点击 **Execute** 按钮）时，浏览器要求输入用户名与密码：

<img src="/img/tutorial/security/image12.png">

## 检查用户名

以下是更完整的示例。

使用依赖项检查用户名与密码是否正确。

        features down to compact but powerful abstractions, and controlling feature bloat carefully.

  - type: textarea
    attributes:
      label: API(s)
      description: Which existing classes or methods do you want to improve?
      placeholder: e.g., `com.google.common.collect.ImmutableList::of`
      render: java
    validations:
      required: true

import java.util.Map;
import java.util.Objects;

import org.eclipse.aether.artifact.AbstractArtifact;
import org.eclipse.aether.artifact.Artifact;

/**
 * @deprecated since 4.0.0, use {@code maven-api-impl} jar instead
 */
@Deprecated(since = "4.0.0")
public final class RelocatedArtifact extends AbstractArtifact {

    private final Artifact artifact;

    private final String groupId;

                .append(Os.OS_ARCH)
                .append("\", family: \"")
                .append(Os.OS_FAMILY)
                .append('\"');
        // Add process information using modern Java API
        if (commandLine != null) {
            version.append(ls).append("Command line: ").append(commandLine);
        }
        if (terminal != null) {
            version.append(ls).append("Terminal: ").append(terminal);

import org.apache.maven.model.profile.ProfileActivationContext;

/**
 * Determines profile activation based on the version of the current Java runtime.
 *
 * @see Activation#getJdk()
 * @deprecated use {@link org.apache.maven.api.services.ModelBuilder} instead
 */
@Named("jdk-version")
@Singleton
@Deprecated(since = "4.0.0")
public class JdkVersionProfileActivator implements ProfileActivator {