import trio # python3 -m pip install --upgrade trio HTML = "Hello World! I'm a %83%83%72 - HTTP polyglot" HTTP_BANNER = f"HTTP/1.1 200 OK\nContent-Length: {len(HTML)+1}\n\n{HTML}\n".encode() async def forward_from_a_to_b(a, b): async for chunk in a: print(f"=> {chunk}", flush=True) await b.send_all(chunk) async def proxy(listen_stream): await listen_stream.send_all(HTTP_BANNER) target_stream = await trio.open_tcp_stream('localhost', 22) async with trio.open_nursery() as nursery: nursery.start_soon(forward_from_a_to_b, listen_stream, target_stream) nursery.start_soon(forward_from_a_to_b, target_stream, listen_stream) async def main(): # 443 for HTTPS, but what about 422 for HTTP+SSH while True: try: await trio.serve_tcp(proxy, 422) except KeyboardInterrupt: break except trio.BrokenResourceError: print("Conn died") if __name__ == '__main__': trio.run(main)