全局依赖¶
对于某些类型的应用程序，您可能希望将依赖项添加到整个应用程序中。
类似于您如何将dependencies添加到路径操作装饰器，您可以将其添加到FastAPI应用程序中。
在这种情况下，它们将应用于应用程序中的所有路径操作
from fastapi import Depends, FastAPI, Header, HTTPException
from typing_extensions import Annotated
async def verify_token(x_token: Annotated[str, Header()]):
if x_token != "fake-super-secret-token":
raise HTTPException(status_code=400, detail="X-Token header invalid")
async def verify_key(x_key: Annotated[str, Header()]):
if x_key != "fake-super-secret-key":
raise HTTPException(status_code=400, detail="X-Key header invalid")
return x_key
app = FastAPI(dependencies=[Depends(verify_token), Depends(verify_key)])
@app.get("/items/")
async def read_items():
return [{"item": "Portal Gun"}, {"item": "Plumbus"}]
@app.get("/users/")
async def read_users():
return [{"username": "Rick"}, {"username": "Morty"}]
from fastapi import Depends, FastAPI, Header, HTTPException
from typing_extensions import Annotated
async def verify_token(x_token: Annotated[str, Header()]):
if x_token != "fake-super-secret-token":
raise HTTPException(status_code=400, detail="X-Token header invalid")
async def verify_key(x_key: Annotated[str, Header()]):
if x_key != "fake-super-secret-key":
raise HTTPException(status_code=400, detail="X-Key header invalid")
return x_key
app = FastAPI(dependencies=[Depends(verify_token), Depends(verify_key)])
@app.get("/items/")
async def read_items():
return [{"item": "Portal Gun"}, {"item": "Plumbus"}]
@app.get("/users/")
async def read_users():
return [{"username": "Rick"}, {"username": "Morty"}]
提示
如果可能，请优先使用Annotated版本。
from fastapi import Depends, FastAPI, Header, HTTPException
async def verify_token(x_token: str = Header()):
if x_token != "fake-super-secret-token":
raise HTTPException(status_code=400, detail="X-Token header invalid")
async def verify_key(x_key: str = Header()):
if x_key != "fake-super-secret-key":
raise HTTPException(status_code=400, detail="X-Key header invalid")
return x_key
app = FastAPI(dependencies=[Depends(verify_token), Depends(verify_key)])
@app.get("/items/")
async def read_items():
return [{"item": "Portal Gun"}, {"item": "Plumbus"}]
@app.get("/users/")
async def read_users():
return [{"username": "Rick"}, {"username": "Morty"}]
以及关于将dependencies添加到路径操作装饰器部分中的所有想法仍然适用，但在这个例子中，它们适用于应用程序中的所有路径操作。
用于一组路径操作的依赖¶
稍后，在阅读有关如何构建更大应用程序（大型应用程序 - 多个文件）的信息时，您将了解如何为一组路径操作声明单个dependencies参数。