fastapi自定义中间件

1、自定义中间件类

from fastapi import Request
from starlette.middleware.base import BaseHTTPMiddlewareclass MyMiddleware(BaseHTTPMiddleware):def __init__(self, app,*args, **kwargs):super().__init__(app,*args, **kwargs)async def dispatch(self, request: Request, call_next):print("MyMiddleware =============================== ")# 接收来自客户端的Request请求；headers = dict(request.scope['headers'])# 将Request请求传回原路由response = await call_next(request)return response

2、使用自定义中间件

app.add_middleware(MyMiddleware)

3、中间件执行顺序，从下往上执行

app.add_middleware(xx1)
app.add_middleware(xx2)

会先执行xx2再执行xx1