docker-offlineimap/contrib/internet-urllib3.py

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#!/usr/bin/env python
import urllib3
import certifi
def isInternetConnected(url="www.ietf.org"):
result = False
http = urllib3.PoolManager(
cert_reqs='CERT_REQUIRED', # Force certificate check.
ca_certs=certifi.where(), # Path to the Certifi bundle.
)
try:
r = http.request('HEAD', 'https://' + url)
result = True
except Exception as e: # urllib3.exceptions.SSLError
result = False
return result
print isInternetConnected()