Returns headers received in an HTTP request. Run it with Python 2.7.

headers.py

#!/usr/bin/env python

import SimpleHTTPServer
import SocketServer

PORT = 8000

class GetHandler(SimpleHTTPServer.SimpleHTTPRequestHandler):
    def do_GET(self):
        self.send_head()
        for h in self.headers:
            self.send_header(h, self.headers[h])
        self.end_headers()
        self.send_response(200, "")

Handler = GetHandler
httpd = SocketServer.TCPServer(("", PORT), Handler)

httpd.serve_forever()