How do I make a Python server public?

Question

Using this code:

from http import server
class Serv(server.BaseHTTPRequestHandler):
    def do_GET(self):
        self.send_response(200)
server.HTTPServer(('host', 80), Serv).serve_forever()

I have tried using my public IP, which didn't work, my private IP, which only worked from the same network, and localhost, which is my PC only. How can I change the host so when someone connects to my IP, it connects to my website (from my code)? Do I need my router to redirect to my PC? I know host can be my private IP or localhost, are there any other hosts I can use? Edit: I saw an answer in another question that used Flask, I'd like to not use any dependencies as of now.

Answer 1

If you want to make it work from anywhere,

your application should listen on IP address 0.0.0.0

which means (in short) any IPv4 address at all :

from http import server

class Serv(server.BaseHTTPRequestHandler):
    def do_GET(self):
        self.send_response(200)
        self.end_headers()
        self.wfile.write(b'Hello, world!')
server.HTTPServer(('', 80), Serv).serve_forever()

If you are in a recent linux/GNU based OS, you may check listening ports with :

ss -ltpn

Note that after that modification, you will depend of any proxy/firewall between you and your server to get your application response.