// At least, I assume that's why. TODO(cpovirk): Check, and maybe add a test for this.
  @SuppressWarnings("ThreadPriorityCheck") // We only propagate user requests (which we discourage).
  private static ThreadFactory doBuild(ThreadFactoryBuilder builder) {
    String nameFormat = builder.nameFormat;
    Boolean daemon = builder.daemon;
    Integer priority = builder.priority;

	"github.com/minio/minio/internal/kms"
	"github.com/minio/minio/internal/logger"
)

type sses3 struct{}

var (
	// S3 represents AWS SSE-S3. It provides functionality to handle
	// SSE-S3 requests.
	S3 = sses3{}

	_ Type = S3
)

// String returns the SSE domain as string. For SSE-S3 the
// domain is "SSE-S3".
func (sses3) String() string { return "SSE-S3" }

这里使用的也是之前创建的 OAuth2 方案，并把它声明为依赖项：`oauth2_scheme`。

该依赖项函数本身不需要作用域，因此，可以使用 `Depends` 和 `oauth2_scheme`。不需要指定安全作用域时，不必使用 `Security`。

此处还声明了从 `fastapi.security` 导入的 `SecurityScopes` 类型的特殊参数。

`SecuriScopes` 类与 `Request` 类似（`Request` 用于直接提取请求对象）。

{* ../../docs_src/security/tutorial005.py hl[8,105] *}

## 使用 `scopes`

参数 `security_scopes` 的类型是 `SecurityScopes`。

它的属性 `scopes`  是作用域列表，所有依赖项都把它作为子依赖项。也就是说所有**依赖**……这听起来有些绕，后文会有解释。

sequenceDiagram
    participant Client
    participant Proxy as Proxy/Load Balancer
    participant Server as FastAPI Server

    Client->>Proxy: HTTPS Request<br/>Host: mysuperapp.com<br/>Path: /items

    Note over Proxy: Proxy adds forwarded headers

    Proxy->>Server: HTTP Request<br/>X-Forwarded-For: [client IP]<br/>X-Forwarded-Proto: https<br/>X-Forwarded-Host: mysuperapp.com<br/>Path: /items

    "foo",
    "bar"
  ]
}
```

/// tip

To declare a query parameter with a type of `list`, like in the example above, you need to explicitly use `Query`, otherwise it would be interpreted as a request body.

///

The interactive API docs will update accordingly, to allow multiple values:

<img src="/img/tutorial/query-params-str-validations/image02.png">

-   [A nice collection](https://www.tfnico.com/presentations/google-guava) of
    other helpful links

## Links

-   [GitHub project](https://github.com/google/guava)
-   [Issue tracker: Report a defect or feature request](https://github.com/google/guava/issues/new)
-   [StackOverflow: Ask "how-to" and "why-didn't-it-work" questions](https://stackoverflow.com/questions/ask?tags=guava+java)

它被直接导入/包含到FastAPI以便你可以从 `fastapi` 导入，并避免意外从 `starlette.background` 导入备用的 `BackgroundTask` (后面没有 `s`)。

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`。

     * @param tc
     *            context to use
     * @param auth
     *            credentials
     * @param doSigning
     *            whether signing is requested
     */
    public NtlmContext(final CIFSContext tc, final NtlmPasswordAuthenticator auth, final boolean doSigning) {
        this.transportContext = tc;
        this.auth = auth;

            wagon = container.lookup(Wagon.class, hint);
        } catch (ComponentLookupException e) {
            throw new UnsupportedProtocolException(
                    "Cannot find wagon which supports the requested protocol: " + protocol, e);
        }

        return wagon;
    }

        request.setGoals(context.options().goals().orElse(List.of()));
        request.setReactorFailureBehavior(determineReactorFailureBehaviour(context));
        request.setRecursive(!context.options().nonRecursive().orElse(!request.isRecursive()));
        request.setOffline(context.options().offline().orElse(request.isOffline()));