getip.py

   1 #!/usr/bin/env python3
   2
   3 import json
   4 import netaddr
   5 import urllib.request
   6
   7 goog_url="https://www.gstatic.com/ipranges/goog.json"
   8 cloud_url="https://www.gstatic.com/ipranges/cloud.json"
   9
  10 def read_url(url):
  11    try:
  12       s = urllib.request.urlopen(url).read()
  13       return json.loads(s)
  14    except urllib.error.HTTPError:
  15       print("Invalid HTTP response from %s" % url)
  16       return {}
  17    except json.decoder.JSONDecodeError:
  18       print("Could not parse HTTP response from %s" % url)
  19       return {}
  20
  21 def main():
  22    goog_json=read_url(goog_url)
  23    cloud_json=read_url(cloud_url)
  24
  25    if goog_json and cloud_json:
  26       print("{} published: {}".format(goog_url,goog_json.get('creationTime')))
  27       print("{} published: {}".format(cloud_url,cloud_json.get('creationTime')))
  28       goog_cidrs = netaddr.IPSet()
  29       for e in goog_json['prefixes']:
  30          if e.get('ipv4Prefix'):
  31             goog_cidrs.add(e.get('ipv4Prefix'))
  32       cloud_cidrs = netaddr.IPSet()
  33       for e in cloud_json['prefixes']:
  34          if e.get('ipv4Prefix'):
  35             cloud_cidrs.add(e.get('ipv4Prefix'))
  36       print("IP ranges for Google APIs and services default domains:")
  37       for i in goog_cidrs.difference(cloud_cidrs).iter_cidrs():
  38          print(i)
  39
  40 if __name__=='__main__':
  41    main()