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import time

from fastapi import FastAPI

from fastapi.requests import Request

app = FastAPI()

@app.middleware("http")

async def add_process_time_header(request: Request, call_next):

start_time = time.time()

response = await call_next(request)

process_time = time.time() - start_time

response.headers["X-Process-Time"] = str(process_time)

return response

@app.get("/items/")

async def read_items():

return [

{"item": "Portal Gun"},

{"item": "Plumbus"},

]

# PYTHONPATH=module_fastapi uvicorn fastapi_middleware:app --reload