logoutUser.cgi

#!/usr/bin/python
import cgi, os, uuid # For environment data and helpers
import hashlib # For basic password security
from pymongo import MongoClient # For MongoDB connections
import cgitb #Traceback
cgitb.enable()
'''
    Name: Drayton Williams
'''
# Details to access MongoDB
username='dw15we'
passwd='5925342'
client=MongoClient('mongodb://'+username+':'+passwd+'@127.0.0.1/'+username)
db=client[username]

# Checks the header cookies for the currently logged in user
# and returns the username, the logs the user out 
def check_logged_in():
    if os.environ.has_key('HTTP_COOKIE'):
        user=None #Assume doesn't exist
        usid=None # until proven otherwise
        cookies=os.environ['HTTP_COOKIE'].split(';')
        for cookie in cookies:
            if cookie.split('=')[0].strip()=='user':
                user=cookie[cookie.find('=')+1:] #Is this one understandable?
            elif cookie.split('=')[0].strip()=='usid':
                usid=cookie[cookie.find('=')+1:]
        if user and usid: #If we have cookies for a username/sesionid
            rec=db.users.find_one({'username':user,'usid':usid})
            if rec!=None: #If the database records match the user
                db.users.update_one({'username':user},{'$set': {'isLoggedIn': False}})
                db.users.update_one({'username':user},{'$unset':{'usid':''}})
                print "Location: ./loginPage.cgi"
                #return user #I know, a little weird to not return True
    return None

print "Content-Type: text/html"
statusName=check_logged_in()
print