title: Reading a client's header from Python CGI script?
body: <p>I'm writing a very simple web service, written in Python and run as CGI on an Apache server.</p>
  
  <p>According to Python docs (somewhere... I forgot where), I can use sys.stdin to read the data POSTed by a random client, and this has been working fine. However, I would like to be able to read the HTTP header information as well - incoming IP, user agent, and so on. I'd also like to keep it very simple for now, by using only Python libraries (so no mod-python). How do I do this?</p>