How to write a proxy-server in Python?

(Edited to note: exact duplicate of 989739)

Could you give any suggestions or online sourses as to the matter of writing one's own client proxy-server? In particular, this proxy must be able to make one thing: replace the HTTP-headers sent by browsers with my own ones.

From stackoverflow

• Have a look at Tiny HTTP Proxy (1) and of course the related docs (2). It's basically running a server and handling requests.

  (1) http://www.okisoft.co.jp/esc/python/proxy/ (2) http://docs.python.org/library/basehttpserver.html

• http://twistedmatrix.com/

  Great library for any networking needs.