from __future__ import print_function
import socket
import os
import requests
[docs]
def internet_connection_is_active():
"""
Check that a internet connection is working by trying contacting the following host:
"""
timeout = 3
if os.environ.get("http_proxy") is None:
# No proxy
# Host: 8.8.8.8 (google-public-dns-a.google.com)
# OpenPort: 53/tcp
# Service: domain (DNS/TCP)
host = "8.8.8.8"
port = 53
try:
socket.setdefaulttimeout(timeout)
socket.socket(socket.AF_INET, socket.SOCK_STREAM).connect((host, port))
except Exception as ex:
print(ex.message)
return False
else:
return True
else:
# We have a proxy. We cannot connect straight to the DNS of Google, we need to tunnel through the proxy
# Since using raw sockets gets complicated and error prone, especially if the proxy has authentication tokens,
# we just try to reach google with a sensible timeout
try:
_ = requests.get("http://google.com", timeout=timeout)
except Exception as ex:
print(ex.message)
return False
else:
return True