PyDynDns

#! /usr/bin/python

import os
import time
import urllib2
import smtplib
from email.MIMEMultipart import MIMEMultipart
from email.MIMEBase import MIMEBase
from email.MIMEText import MIMEText
from email.Utils import COMMASPACE, formatdate
from email import Encoders

def check_in():

    fqn = os.uname()[1]
    tries = 0
    success = False
    while (not success or tries > 5):
        try:
            ext_ip = urllib2.urlopen('http://whatismyip.org').read()
            success = True
        except:
            tries += 1
            print "tries: %d, sleeping for 10 secs" % tries
            time.sleep(10)

    #print ("Asset: %s " % fqn, "Checking in from IP#: %s " % ext_ip)
    return fqn, ext_ip

def sendMail(to, fro, subject, text, files=[],server="localhost"):
    assert type(to)==list
    assert type(files)==list


    msg = MIMEMultipart()
    msg['From'] = fro
    msg['To'] = COMMASPACE.join(to)
    msg['Date'] = formatdate(localtime=True)
    msg['Subject'] = subject

    msg.attach( MIMEText(text) )

    for file in files:
        part = MIMEBase('application', "octet-stream")
        part.set_payload( open(file,"rb").read() )
        Encoders.encode_base64(part)
        part.add_header('Content-Disposition', 'attachment; filename="%s"'
                       % os.path.basename(file))
        msg.attach(part)

    smtp = smtplib.SMTP(server)
    smtp.sendmail(fro, to, msg.as_string() )
    smtp.close()


fqn, ext_ip = check_in()

print "FQN: %s" % fqn
print "Ext IP: %s" % ext_ip
filedata = ""
if (os.path.exists('ipaddr.txt')):
    f = open('ipaddr.txt', 'r')
    filedata = f.read()
    f.close()
if (str(filedata) == ext_ip):
    print "ip match!"
else:
    print "IPs don't match, updating ipaddr.txt..."
    f = open('ipaddr.txt', 'w')
    f.write(ext_ip)
    f.close()
    print "...sending mail..."
    sendMail(['Jules <[email protected]>'],'YoungJules <[email protected]>','Hello from your server!','FQN: %s, IP address: %s' % (fqn, ext_ip),[])
    print "...all done!"