return null;
    }

    // ===================================================================================
    //                                                                    Property Gateway
    //                                                                    ================
    // -----------------------------------------------------
    //                                       Column Property

In diesem Abschnitt werden wir sehen, wie man andere Middlewares verwendet.

## ASGI-Middleware hinzufügen

Da **FastAPI** auf Starlette basiert und die <abbr title="Asynchronous Server Gateway Interface">ASGI</abbr>-Spezifikation implementiert, können Sie jede ASGI-Middleware verwenden.

Eine Middleware muss nicht speziell für FastAPI oder Starlette gemacht sein, um zu funktionieren, solange sie der ASGI-Spezifikation genügt.

        return null;
    }

    // ===================================================================================
    //                                                                    Property Gateway
    //                                                                    ================
    // -----------------------------------------------------
    //                                       Column Property

        return null;
    }

    // ===================================================================================
    //                                                                    Property Gateway
    //                                                                    ================
    // -----------------------------------------------------
    //                                       Column Property

以及如何[使用 `CORSMiddleware` 处理 CORS](../tutorial/cors.md){.internal-link target=_blank}。

本章学习如何使用其它中间件。

## 添加 ASGI 中间件

因为 **FastAPI** 基于 Starlette，且执行 <abbr title="Asynchronous Server Gateway Interface，异步服务器网关界面">ASGI</abbr> 规范，所以可以使用任意 ASGI 中间件。

中间件不必是专为 FastAPI 或 Starlette 定制的，只要遵循 ASGI 规范即可。

总之，ASGI 中间件是类，并把 ASGI 应用作为第一个参数。

因此，有些第三方 ASGI 中间件的文档推荐以如下方式使用中间件：

```Python

the `mc` (the minio ## client used to create a default bucket). ## mcImage: repository: quay.io/minio/mc tag: RELEASE.2022-08-11T00-30-48Z pullPolicy: IfNotPresent ## minio mode, i.e. standalone or distributed or gateway. mode: distributed ## other supported values are "standalone", "gateway" ## Additional labels to include with deployment or statefulset additionalLabels: [] ## Additional annotations to include with deployment or statefulset additionalAnnotation: [] ## Typically the deployment/statefulset...

the `mc` (the minio ## client used to create a default bucket). ## mcImage: repository: quay.io/minio/mc tag: RELEASE.2022-08-23T05-45-20Z pullPolicy: IfNotPresent ## minio mode, i.e. standalone or distributed or gateway. mode: distributed ## other supported values are "standalone", "gateway" ## Additional labels to include with deployment or statefulset additionalLabels: [] ## Additional annotations to include with deployment or statefulset additionalAnnotation: [] ## Typically the deployment/statefulset...

the `mc` (the minio ## client used to create a default bucket). ## mcImage: repository: quay.io/minio/mc tag: RELEASE.2022-05-09T04-08-26Z pullPolicy: IfNotPresent ## minio mode, i.e. standalone or distributed or gateway. mode: distributed ## other supported values are "standalone", "gateway" ## Additional labels to include with deployment or statefulset additionalLabels: [] ## Additional annotations to include with deployment or statefulset additionalAnnotation: [] ## Typically the deployment/statefulset...

the `mc` (the minio ## client used to create a default bucket). ## mcImage: repository: quay.io/minio/mc tag: RELEASE.2022-07-29T19-17-16Z pullPolicy: IfNotPresent ## minio mode, i.e. standalone or distributed or gateway. mode: distributed ## other supported values are "standalone", "gateway" ## Additional labels to include with deployment or statefulset additionalLabels: [] ## Additional annotations to include with deployment or statefulset additionalAnnotation: [] ## Typically the deployment/statefulset...

the `mc` (the minio ## client used to create a default bucket). ## mcImage: repository: quay.io/minio/mc tag: RELEASE.2022-08-05T08-01-28Z pullPolicy: IfNotPresent ## minio mode, i.e. standalone or distributed or gateway. mode: distributed ## other supported values are "standalone", "gateway" ## Additional labels to include with deployment or statefulset additionalLabels: [] ## Additional annotations to include with deployment or statefulset additionalAnnotation: [] ## Typically the deployment/statefulset...