Use it the same way you would use the `FastAPI` class:

```Python hl_lines="6  11  16" title="app/routers/users.py"
{!../../../docs_src/bigger_applications/app/routers/users.py!}
```

You can think of `APIRouter` as a "mini `FastAPI`" class.

All the same options are supported.

All the same `parameters`, `responses`, `dependencies`, `tags`, etc.

!!! tip

## Migration From Other Enterprise Search Systems

### Google Search Appliance (GSA) / Google Mini

Fess provides a [Google Search Appliance](https://enterprise.google.com/search/products/gsa.html) (GSA) compatible API. To enable this API, set `web.api.gsa=true` to system.properties. This will enable an enpoint at `<Fess Server Name>:8080/gsa`. When a search query is sent to `<Fess Server Name>:8080/gsa/?q=QUERY`, a GSA compatible response will be returned

Verwenden Sie ihn auf die gleiche Weise wie die Klasse `FastAPI`:

```Python hl_lines="6  11  16" title="app/routers/users.py"
{!../../../docs_src/bigger_applications/app/routers/users.py!}
```

Sie können sich `APIRouter` als eine „Mini-`FastAPI`“-Klasse vorstellen.

Alle die gleichen Optionen werden unterstützt.

Alle die gleichen `parameters`, `responses`, `dependencies`, `tags`, usw.

!!! tip "Tipp"

.main-footer {\n  margin-left: 0;\n}\n\nbody.sidebar-collapse:not(.sidebar-mini-md):not(.sidebar-mini) .content-wrapper, body.sidebar-collapse:not(.sidebar-mini-md):not(.sidebar-mini) .content-wrapper::before,\nbody.sidebar-collapse:not(.sidebar-mini-md):not(.sidebar-mini) .main-footer,\nbody.sidebar-collapse:not(.sidebar-mini-md):not(.sidebar-mini) .main-footer::before,\nbody.sidebar-collapse:not(.sidebar-mini-md):not(.sidebar-mini) .main-header,\nbody.sidebar-collapse:not(.sidebar-mini-md):not(.sidebar-mini)...

Haroen Viaene, Harold Cooper, Henrik Holst, @hoangmit, Ivan Ukhov, Javier
Dehesa, Jingtian Peng, Jithin Odattu, Joan Pastor, Johan Mathe, Johannes Mayer,
Jongwook Choi, Justus Schwabedal, Kai Wolf, Kamil Hryniewicz, Kamran Amini,
Karen Brems, Karl Lattimer, @kborer, Ken Shirriff, Kevin Rose, Larissa Laich,
Laurent Mazare, Leonard Lee, Liang-Chi Hsieh, Liangliang He, Luke Iwanski, Marek

 * {{{./extension.html}extension descriptor}} and {{{./core-extensions.html}core extensions}},

 * {{{/guides/mini/guide-maven-classloading.html}classloader hierarchy}} done by <<<ClassRealmManager>>> component
 ({{{./apidocs/org/apache/maven/classrealm/ClassRealmManager.html}javadoc}}),
 with its <<<DefaultClassRealmManager>>> implementation

  SHOWN: `shown${EVENT_KEY}`\n  }\n\n  const Default = {\n    autoCollapseSize: 992,\n    enableRemember: false,\n    noTransitionAfterReload: true\n  }\n\n  const Selector = {\n    TOGGLE_BUTTON: '[data-widget=\"pushmenu\"]',\n    SIDEBAR_MINI: '.sidebar-mini',\n    SIDEBAR_COLLAPSED: '.sidebar-collapse',\n    BODY: 'body',\n    OVERLAY: '#sidebar-overlay',\n    WRAPPER: '.wrapper'\n  }\n\n  const ClassName = {\n    SIDEBAR_OPEN: 'sidebar-open',\n    COLLAPSED: 'sidebar-collapse',\n    OPEN: 'sidebar-open'\n...

merckmsd

// miami : 2013-12-19 Registry Services, LLC
miami

// microsoft : 2014-12-18 Microsoft Corporation
microsoft

// mini : 2014-01-09 Bayerische Motoren Werke Aktiengesellschaft
mini

// mint : 2015-07-30 Intuit Administrative Services, Inc.
mint

// mit : 2015-07-02 Massachusetts Institute of Technology
mit