A HTTP server that proxies GET requests to a FTP server

ftpproxy.py

"""
A HTTP server that proxies GET requests to a FTP server
"""

import ftplib
from mimetypes import guess_type
import BaseHTTPServer
from urllib2 import unquote
from optparse import OptionParser

class FTPForwarder(BaseHTTPServer.BaseHTTPRequestHandler):
    def do_GET(s):
        s.send_response(200)
        # If someone went to "http://something.somewhere.net/foo/bar/", then s.path equals "/foo/bar/"
        s.send_header("Content-type", guess_type(s.path.split('/')[-1]))
        s.end_headers()
        ftp.retrbinary('RETR %s' % unquote(s.path), s.wfile.write)

usage = "usage: %prog [options] ip_address"
parser = OptionParser(usage=usage)
parser.add_option("-u", "--username", dest="username",
                  help="username for FTP account")
parser.add_option("-p", "--password", dest="password",
                  help="password for FTP account")
parser.add_option("-d", "--port", dest="port", type="int",
                  help="port to bind server", default=80)

(options, args) = parser.parse_args()  	
ftp = ftplib.FTP(args[0])
ftp.connect()
ftp.login(options.username, options.password)
ftp.set_pasv(True)
httpd = BaseHTTPServer.HTTPServer(('', options.port), FTPForwarder)
try:
    httpd.serve_forever()
except KeyboardInterrupt:
    pass
ftp.quit()
httpd.server_close()