middle man, a proxy use cloud functions as an traffic proxy, cuz some cloud functions are running in foreign regions which don't have network limitations like China mainland.

here is the traffic flow:

browser(url: google.com) -> local-proxy(mitmproxy) -> remote-proxy(cloud functions in foreign regions) -> google.com -> remote-proxy(cloud functions) -> local-proxy(mitmproxy) -> browser

mitmdump -s local_proxy.py -p 8081 --no-http2 --ssl-insecure 

local proxy address: localhost:8081