mitmproxy script for replacing a specific url with the content from a local file

replace.py

from mitmproxy import http

def request(flow: http.HTTPFlow) -> None:
    if "example.com/path/file.html" in flow.request.pretty_url:
        with open('replacement.html', 'r') as myfile:
            html = myfile.read().replace('\n', '')
            flow.response = http.HTTPResponse.make(
                200,  # status code
                html,  # content
                {"Content-Type": "text/html"}
            )