add users + passwords to passdb for tornado basic auth example

tornado_basic_auth_bcrypt_add_user

#!/usr/bin/env python
# for example itself see: https://gist.github.com/fliphess/7836469
import argparse
import bcrypt
import getpass
import sys
import os.path
import re

def parse_options():
    """ Get options and return arguments
    """
    parser = argparse.ArgumentParser(description="""
        Add an administrator to the password file

        Flip Hess 2013 - <flip@fliphess.com>
    """)
    parser.add_argument('-f', '--file', help='The server settings', required=True, type=str)
    parser.add_argument('-u', '--user', help='The host to delete', required=True, type=str)
    arguments = vars(parser.parse_args())
    return arguments

def main():
    args = parse_options()
    if not os.path.isfile(args['file']):
        print "Fail! File not present!"
        sys.exit(1)

    with open(args['file'], "r") as fh:
        content = fh.readlines()

    r = re.compile(r"%s:.*" % args['user'])
    for line in content:
        m = r.search(line)
        if m:
            print "User allready in password file! Please remove first!"
            sys.exit(1)

    print "Enter password:" 
    password1 = getpass.getpass()
    print "Enter again:"
    password2 = getpass.getpass()

    if not password1 == password2:
        print "Passwords do not match!"
        sys.exit(1)
        
    hashed = bcrypt.hashpw(password1, bcrypt.gensalt(12))
    with open(args['file'], "a+") as fh:
        fh.write("%s:%s\n" % (args['user'], hashed))

if __name__ == "__main__":
    main()