is it up, yet?

isitonyet.py

#!/usr/bin/env python
# -*- coding: utf-8 -*-
#
# need to check a site if contains a regexp? cron stuff, eh?
# 
# @author:     starenka
# @email:      'moc]tod[liamg].T.E[0aknerats'[::-1]
# @version:    1.0
# @since       2/28/11
# @depends     urlgrabber

import re,smtplib,datetime,sys
from email.mime.text import MIMEText
from optparse import OptionParser
from subprocess import Popen
import urlgrabber

TIMEOUT = 5
EMAIL_MESS = "The regexp you've been looking for it's on!\n\n%s"
EMAIL_FROM = 'ItsOnYet@domain.net'

usage = '%s -swww.icanhascheezburger.com -rchee[sz]burger -mmy@email.com'%(sys.argv[0])
oparser = OptionParser(usage)
oparser.add_option('-s','--site',action='store',dest='site',default = False,\
                  help='site URL')
oparser.add_option('-r','--regexp',action='store',dest='regexp',default = False,\
                  help='regexp to grep with')
oparser.add_option('-m','--mail',action='store',dest='email',default = False,\
                  help='send mail to this address')
oparser.add_option('-n','--notify',action='store_true',dest='knotify',default = False,\
                  help='notify (KDE4)')
(options,args) = oparser.parse_args()

if len(sys.argv) == 1: sys.exit(usage)

def is_mail(str):
    if not str:
        return False
    return re.match(r'^[0-9a-zA-Z]+@[0-9a-zA-Z]+\.[0-9a-zA-Z]{1,4}$',str)

def mail(to,site,regexp,mess=EMAIL_MESS,from_=EMAIL_FROM):
    now = datetime.datetime.now()
    msg = MIMEText(mess%now)
    msg['Subject'] = "It's up! '%s'@%s %s"%(regexp,site,now)
    msg['From'] = from_
    msg['To'] = to

    s = smtplib.SMTP()
    s.connect()
    try:
        s.sendmail(from_, [to], msg.as_string())
        s.quit()
    except Exception,e:
        print e

def knotify():
    cmd = ['kdialog',"It's on!",'--passivepopup','Hey! Regexp "%s" found at %s!'%
                                                 (options.regexp,options.site),'5']
    try:
        proc = Popen(cmd,shell=False)
        proc.communicate()
    except Exception,e: print e

if options.site and options.regexp and (is_mail(options.email) or options.knotify):
    try:
        if options.site[0:4] != 'http':
            options.site = 'http://%s'%options.site
        page = urlgrabber.urlread(options.site,None,timeout=TIMEOUT)
    except Exception, e:
        sys.exit('Failed to get uri %s %s'%(options.site,e))
    if re.search(re.compile(options.regexp,re.IGNORECASE),page):
        if options.knotify:
            knotify()
        if options.email:
            mail(options.email,options.site,options.regexp)
else: sys.exit('Need site URL, regexp and some notification method to start...')