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#!/usr/bin/env python3
import os
import subprocess
import sys
from urllib.parse import urlparse
proxy = next(os.environ[_] for _ in ("HTTP_PROXY", "HTTPS_PROXY") if _ in os.environ)
parsed = urlparse(proxy)
proxy_protocols = {
"http": "connect",
"https": "connect",
"socks": "5",
"socks5": "5",
"socks4": "4",
"socks4a": "4",
}
if parsed.scheme not in proxy_protocols:
raise TypeError('unsupported proxy protocol: "{}"'.format(parsed.scheme))
argv = [
"nc",
"-X",
proxy_protocols[parsed.scheme], # Supported protocols are 4 (SOCKS v4), 5 (SOCKS v5) and connect (HTTP proxy). Default SOCKS v5 is used.
"-x",
parsed.netloc, # proxy-host:proxy-port
sys.argv[1], # host
sys.argv[2], # port
]
subprocess.call(argv)
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