## Recap, step by step

### Step 1: import `FastAPI`

{* ../../docs_src/first_steps/tutorial001.py hl[1] *}

`FastAPI` is a Python class that provides all the functionality for your API.

/// note | "Technical Details"

`FastAPI` is a class that inherits directly from `Starlette`.

 *
 * When the maximum concurrent streams limit is reduced, some allocations will be rescinded.
 * Attempting to create new streams on these allocations will fail.
 *
 * Note that an allocation may be released before its stream is completed. This is intended to make
 * bookkeeping easier for the caller: releasing the allocation as soon as the terminal stream has

                                                    </c:if> <c:if test="${data.endTime==null}">
                                                        <la:message key="labels.none"/>
                                                    </c:if></td>
                                                </tr>
                                            </c:forEach>

 * License as published by the Free Software Foundation; either
 * version 2.1 of the License, or (at your option) any later version.
 *
 * This library is distributed in the hope that it will be useful,
 * but WITHOUT ANY WARRANTY; without even the implied warranty of
 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
 * Lesser General Public License for more details.
 *

 * License as published by the Free Software Foundation; either
 * version 2.1 of the License, or (at your option) any later version.
 *
 * This library is distributed in the hope that it will be useful,
 * but WITHOUT ANY WARRANTY; without even the implied warranty of
 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
 * Lesser General Public License for more details.
 *

            Set<Artifact> ignorableArtifacts)
            throws ArtifactResolutionException, ArtifactNotFoundException;

    /**
     * Resolves the transitive dependencies of the specified projects. Note that dependencies which can't be resolved
     * from any repository but are present among the set of specified projects will not cause an exception. Instead,

////

//// tab | 🐍 3️⃣.1️⃣0️⃣ & 🔛

```Python hl_lines="1  15"
{!> ../../docs_src/path_operation_configuration/tutorial001_py310.py!}
```

////

👈 👔 📟 🔜 ⚙️ 📨 & 🔜 🚮 🗄 🔗.

/// note | "📡 ℹ"

👆 💪 ⚙️ `from starlette import status`.

**FastAPI** 🚚 🎏 `starlette.status` `fastapi.status` 🏪 👆, 👩‍💻. ✋️ ⚫️ 👟 🔗 ⚪️➡️ 💃.

///

## 🔖

이러한 경우, 데이터를 응답에 전달하기 전에 `jsonable_encoder`를 사용하여 변환할 수 있습니다:

```Python hl_lines="6-7 21-22"
{!../../docs_src/response_directly/tutorial001.py!}
```

/// note | "기술적 세부 사항"

`from starlette.responses import JSONResponse`를 사용할 수도 있습니다.

**FastAPI**는 개발자의 편의를 위해 `starlette.responses`를 `fastapi.responses`로 제공합니다. 그러나 대부분의 가능한 응답은 Starlette에서 직접 제공합니다.

///

Here we use it to create a `GzipRequest` from the original request.

{* ../../docs_src/custom_request_and_route/tutorial001.py hl[18:26] *}

/// note | "Technical Details"

A `Request` has a `request.scope` attribute, that's just a Python `dict` containing the metadata related to the request.

app = FastAPI()

app.add_middleware(UnicornMiddleware, some_config="rainbow")
```

`app.add_middleware()` 的第一个参数是中间件的类，其它参数则是要传递给中间件的参数。

## 集成中间件

**FastAPI** 为常见用例提供了一些中间件，下面介绍怎么使用这些中间件。

/// note | "技术细节"

以下几个示例中也可以使用 `from starlette.middleware.something import SomethingMiddleware`。

**FastAPI** 在 `fastapi.middleware` 中提供的中间件只是为了方便开发者使用，但绝大多数可用的中间件都直接继承自 Starlette。

///

## `HTTPSRedirectMiddleware`