# 手动运行服务器

## 使用 `fastapi run` 命令

简而言之，使用 `fastapi run` 来运行您的 FastAPI 应用程序：

<div class="termy">

```console
$ <font color="#4E9A06">fastapi</font> run <u style="text-decoration-style:solid">main.py</u>

  <span style="background-color:#009485"><font color="#D3D7CF"> FastAPI </font></span>  Starting production server 🚀

             Searching for package file structure from directories

    The dependency result will be a string containing the key value.

    ## Example

    ```python
    from fastapi import Depends, FastAPI
    from fastapi.security import APIKeyQuery

    app = FastAPI()

    query_scheme = APIKeyQuery(name="api_key")


    @app.get("/items/")
    async def read_items(api_key: str = Depends(query_scheme)):

# Merkmale { #features }

## FastAPI Merkmale { #fastapi-features }

**FastAPI** ermöglicht Ihnen Folgendes:

### Basiert auf offenen Standards { #based-on-open-standards }

# Features { #features }

## FastAPI features { #fastapi-features }

**FastAPI** gives you the following:

### Based on open standards { #based-on-open-standards }

from base64 import b64encode

from fastapi import FastAPI, Security
from fastapi.security import HTTPBasic, HTTPBasicCredentials
from fastapi.testclient import TestClient

app = FastAPI()

security = HTTPBasic(realm="simple")


@app.get("/users/me")
def read_current_user(credentials: HTTPBasicCredentials = Security(security)):
    return {"username": credentials.username, "password": credentials.password}


client = TestClient(app)

    "size": "XL"
  }
}
```

#### `HTTPException` в FastAPI или в Starlette { #fastapis-httpexception-vs-starlettes-httpexception }

**FastAPI** имеет собственный `HTTPException`.

Класс ошибок **FastAPI** `HTTPException` наследует от класса ошибок Starlette `HTTPException`.

**FastAPI** stellt denselben `starlette.testclient` auch via `fastapi.testclient` bereit, als Annehmlichkeit für Sie, den Entwickler. Es kommt aber tatsächlich direkt von Starlette.

///

/// tip | Tipp

from fastapi import FastAPI, Security
from fastapi.security.http import HTTPAuthorizationCredentials, HTTPBase
from fastapi.testclient import TestClient

app = FastAPI()

security = HTTPBase(scheme="Other", description="Other Security Scheme")


@app.get("/users/me")
def read_current_user(credentials: HTTPAuthorizationCredentials = Security(security)):
    return {"scheme": credentials.scheme, "credentials": credentials.credentials}

from fastapi import FastAPI
from fastapi.responses import FileResponse

some_file_path = "large-video-file.mp4"
app = FastAPI()


@app.get("/")
async def main():

Par exemple, en étendant le modèle précédent, vous pouvez vouloir ajouter un paramètre `importance` dans le même body, en plus des paramètres `item` et `user`.

Si vous le déclarez tel quel, comme c'est une valeur [scalaire](https://docs.github.com/fr/graphql/reference/scalars), **FastAPI** supposera qu'il s'agit d'un paramètre de requête (`Query`).