assignment 12.3

import urllib
import re

url = raw_input('Enter - ')
if (re.search('^http://[a-zA-Z0-9]+.[a-zA-Z0-9]+.[a-zA-Z0-9]+/',url)):
    try:
        web = urllib.urlopen(url)
    except:
        print(url, ' is not a correct server')
        exit()
    count = 0
    while True:
        data = web.read(3000)
        if (len(data) < 1) : break
        count = count + len(data)
        if (count <= 3000):
            print (data.decode('utf-8'))
    print("The total count of this web is", count)
else:
    print("The URL that you input is bad format")