nc-negotiate

#!/usr/bin/env python

import argparse
import os

try:
    from urlparse import urlparse
except ImportError:
    from urllib.parse import urlparse

from proxy_negotiate import netcat, __version__

def proxy_host_from_env():
    if 'HTTPS_PROXY' in os.environ:
        return urlparse(os.environ['HTTPS_PROXY']).hostname
    elif 'HTTP_PROXY' in os.environ:
        return urlparse(os.environ['HTTP_PROXY']).hostname
    else:
        raise RuntimeError('No PROXY environment variable set.')

def proxy_port_from_env():
    if 'HTTPS_PROXY' in os.environ:
        return urlparse(os.environ['HTTPS_PROXY']).port
    elif 'HTTP_PROXY' in os.environ:
        return urlparse(os.environ['HTTP_PROXY']).port
    else:
        raise RuntimeError('No PROXY environment variable set.')

parser = argparse.ArgumentParser(description='')
parser.add_argument('host', help='Hostname or IP to tunnel a connection to.')
parser.add_argument('port', help='Port to tunnel a connection to', type=int)
parser.add_argument('proxy_host', help='Hostname of the proxy server.', nargs='?', default=proxy_host_from_env())
parser.add_argument('proxy_port', help='Port of the proxy server.', nargs='?', type=int, default=proxy_port_from_env())
parser.add_argument('--version', '-V', action='version', version='%(prog)s ' + __version__)
args = parser.parse_args()

netcat(args.host, args.port, args.proxy_host, args.proxy_port)