<prompt> Write a middleware program to filter all incoming requests on a website  <response>: A middleware program is a software component that sits between the web server and the application, intercepting and processing requests before they reach the application. Here is an example of a simple middleware program written in Python using the Flask web framework to filter all incoming requests on a website:pythonfrom flask import Flask, request, abortapp Flask__name__app.before_requestdef filter_requests: Add your filtering logic here if not request.headers.getAPI-KEY SECRET_KEY: abort401 Define your routes hereapp.routedef home: return Welcome to the website!if __name__ __main__: app.runIn this example, the filter_requests function is decorated with the before_request decorator, which means that it will be executed before any request is processed. In this function, we are checking if the request contains an API-KEY header with a value of SECRET_KEY. If the header is not present or the value is incorrect, the request is aborted with an HTTP 401 Unauthorized error.You can modify and extend filter_requests function to add your own custom filtering logic. For instance, you can check the request IP against a blacklist, check the request method, validate the request payload or headers, and so on.Once the middleware has processed the request, it is passed on to the appropriate route handler, where the application can process it and generate a response. 