dyn

   1 #!/usr/bin/python
   2 # dynamic dns updater for everydns.net
   3 # takes domain to update as an argument
   4
   5 import sys
   6 import os
   7 import netrc
   8 import urllib
   9
  10 tmpfile = '.ip'
  11
  12 def extip():
  13     url = 'http://ip.cutup.org'
  14     return urllib.urlopen(url).read()
  15
  16 def everydns(domain):
  17     host = 'dyn.everydns.net'
  18     page = 'index.php?ver=0.1&domain='
  19     try:
  20         (user, acct, passwd) = netrc.netrc().authenticators(host)
  21     except:
  22         return "auth not found in netrc"
  23     url = 'http://%s:%s@%s/%s%s' % (user, passwd, host, page, domain)
  24     try:
  25         response = urllib.urlopen(url).read()
  26     except:
  27         response = "error updating IP"
  28     return response
  29
  30 def main():
  31     if len(sys.argv) != 1:
  32         return
  33     oldip = 0
  34     try:
  35         currip = extip()
  36     except:
  37         return
  38     if os.path.exists(tmpfile):
  39         f = open(tmpfile, 'r')
  40         oldip = f.readline().rstrip(os.linesep)
  41         f.close()
  42     if oldip == currip:
  43         return
  44     response = everydns(sys.argv[1])
  45     f = open(tmpfile, 'w')
  46     f.write(currip + '\n')
  47     f.writelines(response)
  48     f.close()
  49
  50 if "__main__" == __name__:
  51     main()