Und dann mounten Sie das auf einem Pfad.

{* ../../docs_src/wsgi/tutorial001_py39.py hl[2:3,3] *}

## Es testen { #check-it }

Jetzt wird jeder <abbr title="Request – Anfrage: Daten, die der Client zum Server sendet">Request</abbr> unter dem Pfad `/v1/` von der Flask-Anwendung verarbeitet.

Und der Rest wird von **FastAPI** gehandhabt.

| IMPORTANT |
| -------------------------- |

  @CollectionFeature.Require(absent = SUPPORTS_REMOVE)
  @ListFeature.Require(absent = {SUPPORTS_SET, SUPPORTS_ADD_WITH_INDEX})
  public void testListIterator_unmodifiable() {
    runListIteratorTest(UNMODIFIABLE);
  }

  /*
   * For now, we don't cope with testing this when the list supports only some
   * modification operations.
   */
  @CollectionFeature.Require(SUPPORTS_REMOVE)

    }

    /**
     * Returns the request type.
     *
     * @return Returns the request type. The Request type is one of
     *         <code>TransferEvent.REQUEST_GET</code> or <code>TransferEvent.REQUEST_PUT</code>
     */
    public int getRequestType() {
        return requestType;
    }

    /**
     * Sets the request type
     *
     * @param requestType The requestType to set.

  @CollectionFeature.Require(ALLOWS_NULL_VALUES)
  @CollectionSize.Require(absent = ZERO)
  public void testCreateWithNull_supported() {
    E[] array = createArrayWithNullElement();
    collection = getSubjectGenerator().create(array);
    expectContents(array);
  }

  @CollectionFeature.Require(absent = ALLOWS_NULL_VALUES)
  @CollectionSize.Require(absent = ZERO)

        MavenExecutionRequest request = new DefaultMavenExecutionRequest();
        request.setResumeFrom(":module-b");
        Properties properties = new Properties();
        properties.setProperty("remainingProjects", ":module-a");

        repository.applyResumptionProperties(request, properties);

        assertEquals(":module-b", request.getResumeFrom());
    }

    @Test

            } catch (final IOException ioe) {}
        }
    }

    /**
     * Handles file download requests for SMB files.
     * @param req the HTTP servlet request
     * @param resp the HTTP servlet response
     * @param file the SMB file to download
     * @throws IOException if an I/O error occurs
     */

        // search

    }

    /**
     * Get the permissions.
     * @param request The request.
     * @return The permissions.
     */
    public OptionalEntity<Set<String>> getPermissions(final HttpServletRequest request) {
        final String token = ComponentUtil.getAccessTokenHelper().getAccessTokenFromRequest(request);
        if (StringUtil.isNotBlank(token)) {
            return accessTokenBhv.selectEntity(cb -> {

如果你使用了 `yield` 关键字依赖, 依赖中的退出代码将在执行中间件*后*执行.

如果有任何后台任务(稍后记录), 它们将在执行中间件*后*运行.

///

## 创建中间件

要创建中间件你可以在函数的顶部使用装饰器 `@app.middleware("http")`.

中间件参数接收如下参数:

* `request`.
* 一个函数 `call_next` 它将接收 `request` 作为参数.
    * 这个函数将 `request` 传递给相应的 *路径操作*.
    * 然后它将返回由相应的*路径操作*生成的 `response`.
* 然后你可以在返回 `response` 前进一步修改它.

{* ../../docs_src/middleware/tutorial001.py hl[8:9,11,14] *}

/// tip

    request: Request,
    proxyType: Proxy.Type,
  ): Boolean = !request.isHttps && proxyType == Proxy.Type.HTTP

  /**
   * Returns the path to request, like the '/' in 'GET / HTTP/1.1'. Never empty, even if the request
   * URL is. Includes the query component if it exists.
   */
  fun requestPath(url: HttpUrl): String {
    val path = url.encodedPath
    val query = url.encodedQuery