#!/usr/bin/python
import urllib, string, sys, os, smtplib
from xml.dom import minidom

#######################    START USER DEFINED VARIABLES   #######################
#comma-separated list of RSS feeds to monitor
feeds = ['http://rss.cnn.com/rss/cnn_topstories.rss',
         'http://digg.com/rss/containertechnology.xml']

#strings to look for in the feeds
#for a pattern to match, all words in each list must be present
#in the search string
patterns = [['your', 'full', 'name'], ['something', 'else']]
			
#mailing list for the alerts
tolist = ['you@mail.com', 'yourfriend@mail.com']

#email address that you want the alerts to come from
fromaddr = 'feedmonitor@somewhere.com'

#######################     END USER DEFINED VARIABLES    #######################

#function to filter whether or not a phrase contains all the keywords
#in a particular pattern -> only returns true if all the words in 
#the pattern are present
def filter(phrase):
    for pattern in patterns:
        alert = True
        postWords = string.split(string.lower(phrase))
        for word in pattern:
            if word not in postWords:
                alert = False
        if alert:
            return True
    return False

#container for the items to monitor
posts = []

#container for items to alert on
alerts = []

for f in feeds:
	#to use the Python XML parser, we need to place the RSS data in a file
    fp = open("tempfile","w")
    fp.write(urllib.urlopen(f).read())
    fp.close()
    try:
        xmldoc = minidom.parse("tempfile")
    except:
        print "feedMonitor - unable to read feed:", f
        sys.exit()

    items = xmldoc.getElementsByTagName("item")
    for i in items:
        myTitle = i.getElementsByTagName("title")
        myLink = i.getElementsByTagName("link")
        #each post is a tuple containing the source, link, and title of the vuln
        posts.append((f, myLink[0].firstChild.toxml(),
                      myTitle[0].firstChild.toxml()))

#send each post to the keyword filter
#any posts that match on one or more filters will be added to the list of alerts
#to be mailed
for post in posts:
    if filter(post[2]):
        alerts.append(post)

#if there are any alerts found, mail them out
if len(alerts):
    s = smtplib.SMTP("localhost")
    msg = 'To: '
    for recipient in tolist[:-1]:
        msg += recipient+', '
    msg += tolist[-1]
    if len(alerts) == 1:
        msg += '\nSubject: New Alert Found - Please Review\n\n'
    else:
        msg += '\nSubject: New Alerts Found - Please Review\n\n'
    for alert in alerts:
        msg += alert[2] + " - " + alert[1] + "\n\n"
    #send out the mail
    print msg
    print tolist
    s.sendmail(fromaddr,tolist,msg)
    
#a little housecleaning - remove the tempfile
try:
    os.remove("tempfile")
except:
    pass