zeaster

At home, my boxes are connected to internet by Beijing ADSL.
when connected, Beijing ADSL gives me a dynamic ip and it changes about every 24 hours.
Before I get the dynamic ip by a service provided by oray.net.
However recently the service is broken.
So I have to write a python script to check the dynamic ip from my tp-link router every 3 minutes and if it changed, emails the new dynamic ip to my gmail.

I also write a bash script to run the above python script at boot on my gentoo linux.

The python script:

 
#!/usr/bin/python
 
import urllib
import urllib2
import libgmail
import cookielib
import sys
import re
import base64
import socket
import time
from urlparse import urlparse
 
nowip=''
logfile=open('/var/log/ipsender.log','w')
 
def log(s):
 now=time.strftime('%Y-%m-%d %X')
 logfile.write('%s %sn'%(now,s))
 logfile.flush()
 
def gmailsender(to_addr,subject,msg):
 username='xxx@gmail.com'
 password='xxx'
 ga=libgmail.GmailAccount(username,password)
 ga.login()
 gmsg=libgmail.GmailComposedMessage(to_addr,subject,msg)
 ga.sendMessage(gmsg)
 
def check():
 global nowip
 timeout=10
 socket.setdefaulttimeout(timeout)
 username = 'admin'
 password = 'xxx'
 try:
   theurl='http://192.168.1.1/userRpm/StatusRpm.htm'
   req = urllib2.Request(theurl)
   base64string = base64.encodestring('%s:%s' % (username, password))[:-1]
   authheader =  "Basic %s" % base64string
   req.add_header("Authorization", authheader)
   handle = urllib2.urlopen(req)
   str=handle.read()
   ss='var wanPara = new Array'
   start=str.index(ss)+ss.__len__()
   end=str.index(';',start)
   s2=str[start:end]
   log(s2)
   t=eval(s2)
   log(t[2])
   handle.close()
   if nowip!=t[2]:
     nowip=t[2]
     gmailsender('mygmail@gmail.com','ddnsip===%s'%nowip,s2)
     log('send %s successfully.'%nowip)
   else:
     log('ddnsip remains %s.'%nowip)
 except:
   log('Unexpected error:', sys.exc_info()[0])
 
def main():
 while True:
   check()
   time.sleep(3*60)
 
main()

The bash script put in /etc/init.d/:

 
#!/sbin/runscript
# Copyright 1999-2004 Gentoo Foundation
start()	{
	ebegin "Starting ipsender"
	nohup python /home/zeaster/amp/ipsender.py >> /var/log/ipsender-nohup.log&
	eend $?
}
stop()	{
	ebegin "Stopping ipsender unsuccessfully"
	eend $?
}