How can I change a user agent string programmatically?

Question

I want to write a program that changes the HTTP headers in my requests that are sent by my web-browser. I believe it can be done with a proxy server. So, I'd like to write a proxy server.

How can I do this in Python?

Answer 1

Why not use an existing proxy such as Charles HTTP Proxy? It has the ability to rewrite headers and do all sorts of cool stuff to requests and responses.

Answer 2

This is a list of HTTP proxies in python.