What is the process for including a personalized decorator in a FastAPI route?

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To include a personalized decorator in a FastAPI route, follow these steps:

1. Define the decorator function that will modify the behavior of the FastAPI route. The decorator function should take a function as an argument and return a new function that modifies the behavior of the original function.

2. Use the decorator function to wrap the FastAPI route function. This will modify the behavior of the route according to the rules defined in the decorator.

For example, if you want to create a personalized decorator that logs each request to a specific endpoint, you can define a decorator function like this:

from fastapi import Request

def log_requests(func):
    async def wrapper(request: Request, *args, **kwargs):
        print(f"Request made to endpoint {request.url.path}")
        return await func(request, *args, **kwargs)
    return wrapper

Then, you can use the @log_requests decorator to wrap any FastAPI route function that you want to log requests for:

from fastapi import FastAPI

app = FastAPI()

@app.get("/")
@log_requests
async def root():
    return {"message": "Hello World"}

Now, every time a request is made to the root endpoint, the log_requests decorator will log the details of the request to the console before returning the response.