{* ../../docs_src/security/tutorial004_an_py310.py hl[4,7,13:15,29:31,82:90] *}

## 更新相依項目 { #update-the-dependencies }

更新 `get_current_user`，讓它仍接收相同的權杖，但這次改用 JWT 權杖。

解碼收到的權杖、驗證它，並回傳目前的使用者。

如果權杖無效，立即回傳一個 HTTP 錯誤。

{* ../../docs_src/security/tutorial004_an_py310.py hl[93:110] *}

## 更新 `/token` 路徑操作 { #update-the-token-path-operation }

用權杖有效期建立一個 `timedelta`。

建立真正的 JWT access token 並回傳它。

{* ../../docs_src/security/tutorial004_an_py310.py hl[4,7,13:15,29:31,82:90] *}

## 更新依赖项 { #update-the-dependencies }

更新 `get_current_user` 以接收与之前相同的令牌，但这次使用的是 JWT 令牌。

解码接收到的令牌，进行校验，并返回当前用户。

如果令牌无效，立即返回一个 HTTP 错误。

{* ../../docs_src/security/tutorial004_an_py310.py hl[93:110] *}

## 更新 `/token` 路径操作 { #update-the-token-path-operation }

用令牌的过期时间创建一个 `timedelta`。

创建一个真正的 JWT 访问令牌并返回它。

# API IMPORTS PLACEHOLDER

# WRAPPER_PLACEHOLDER

if "dev" in __version__:   # pylint: disable=undefined-variable
  _logging.warning("""

  TensorFlow's `tf-nightly` package will soon be updated to TensorFlow 2.0.

  Please upgrade your code to TensorFlow 2.0:
    * https://www.tensorflow.org/guide/migrate

  Or install the latest stable TensorFlow 1.X release:
    * `pip install -U "tensorflow==1.*"`

		resp := localMetacacheMgr.getBucket(ctx, o.Bucket).findCache(o)
		return &resp, nil
	}
	return getMetacacheListingRPC.Call(ctx, client.gridConn(), &o)
}

// UpdateMetacacheListing - update an existing metacache it will unconditionally be updated to the new state.
func (client *peerRESTClient) UpdateMetacacheListing(ctx context.Context, m metacache) (metacache, error) {
	if client == nil {
		return localMetacacheMgr.updateCacheEntry(m)
	}

   * to calling it exactly once.
   *
   * @since 10.0 (present in 1.0 as {@code run})
   */
  public void execute() {
    // Lock while we update our state so the add method above will finish adding any listeners
    // before we start to run them.
    RunnableExecutorPair list;
    synchronized (lock) {
      if (executed) {
        return;
      }

    }
    
    public void updateDirectoryCache(String directoryPath, List<SmbFile> files) {
        DirectoryCacheEntry entry = getCacheEntry(directoryPath);
        if (entry == null) return;
        
        // Update cache with new directory listing
        for (SmbFile file : files) {
            SmbFileAttributes attrs = file.getAttributes();
            entry.updateChild(file.getName(), attrs);
        }
        

```

</div>

然后在 `/docs` UI 中，你能够看到 **FastAPI** 会用这些**模型**来**记录** API，并且还会用它们来**序列化**和**验证**数据。

<div class="screenshot">
<img src="/img/tutorial/sql-databases/image01.png">
</div>

## 使用多个模型更新应用 { #update-the-app-with-multiple-models }

现在让我们稍微**重构**一下这个应用，以提高**安全性**和**多功能性**。

如果你查看之前的应用程序，你可以在 UI 界面中看到，到目前为止，它允许客户端决定要创建的 `Hero` 的 `id`。😱

					hdr.Typeflag = TypeDir // Legacy archives use trailing slash for directories
				} else {
					hdr.Typeflag = TypeReg
				}
			}

			// The extended headers may have updated the size.
			// Thus, setup the regFileReader again after merging PAX headers.
			if err := tr.handleRegularFile(hdr); err != nil {
				return nil, err
			}

- **[Community Resources](https://gradle.org/resources/)** - Find more community-contributed materials to expand your knowledge.

> 🌟 **Stay connected with the Gradle Community and access the latest news, training, and updates via [Slack](https://gradle.org/slack-invite), [Forum](https://discuss.gradle.org/), and our [Newsletter](https://newsletter.gradle.org)**.

<br><br>
<div align="center" style="margin-top: 20px;">

   * This implementation requires O(|N|) time. Classes extending this one may manually keep track of
   * the number of edges as the graph is updated, and override this method for better performance.
   */
  protected long edgeCount() {
    long degreeSum = 0L;
    for (N node : nodes()) {
      degreeSum += degree(node);
    }