Url Downloader

main.py

#!/usr/bin/python3
#
#  Author:Krishna Mohan Sinha
#  Project:Website Downloader
#  
#  How To Run : ./main  url dirname
#  Example :    ./main http:www/google.com /krishna


import os
import re
import sys
import urllib.request
import urllib.error
import urllib
class myurl:
    pass

def main():
    numarg=len(sys.argv)
    if(numarg<2):
        print("Usage : ./main url dirname")
        sys.exit(1)
    try:
        url=sys.argv[1]
        ureq=urllib.request.Request(sys.argv[1])
        ures=urllib.request.urlopen(url)
    except urllib.error.HTTPError as e:
        sys.stderr.write('The server couldn\'t fulfill the request.')
        sys.stderr.write('Error code: ', e.code)
        sys.exit(1)
    except urllib.error.URLError as e:
        sys.stderr.write("We Failed To Reach Server")
        sys.stderr.write("Reason - ",e.reason )
        sys.exit(1)
    else:
        #Connection Established
        uurl=ures.geturl()
        urlinfo=ures.info()
        print()
        for key in urlinfo:
            print(key,"   ",urlinfo[key])
        print()
        
        
        print("Retrieving all links from URL")
        print("Retrieving all links from URL")
        ## print(ures.read())
        pat=re.compile(b"href=[\"\'](.[^\"\']+)[\"\']", re.I)
        links=re.findall(pat,ures.read())

        ##Links Found
        for link in links:
            print(link)
            print()


        ##Rest Module in file2

if __name__ =="__main__":
    main()