Python script to download google fonts

gfonts_offline.py

__author__ = ('Imam Omar Mochtar', 'iomarmochtar@gmail.com')

import urllib2
import sys
import os
import re

FONTS_DIR = 'fonts'
CSS_FILE = 'offline.css'
site = sys.argv[1]
url_re = re.compile(r'url\((.*?)\)')
USER_AGENT = 'Mozilla/5.0 (X11; Ubuntu; Linux x86_64; rv:64.0) Gecko/20100101 Firefox/64.0'

for check in [FONTS_DIR, CSS_FILE]:
    if os.path.isdir(check) or os.path.isfile(check):
        print('directory/file {} is already exist please do backup or remove it'.format(check))
        sys.exit(1)

os.mkdir(FONTS_DIR)

fetcher = urllib2.build_opener()
fetcher.addheaders = [('User-Agent', USER_AGENT)]
font_urls = []
css_code = []

for line in fetcher.open(site).readlines():
    url_match = url_re.search(line)
    if url_match:
        font_url = url_match.group(1)
        font_urls.append(font_url)
        font_path = os.path.join(
            '..', FONTS_DIR, os.path.basename(font_url)
            )         
        # subtitute url in css line
        line = url_re.sub(
            'url({})'.format(font_path)
            , line)
    css_code.append(line)

for url in font_urls:
    print('Downloading {}'.format(url))
    local_path = os.path.join(
        FONTS_DIR, os.path.basename(url))
    with open(local_path, 'wb') as fp:
        fetch = urllib2.urlopen(url)
        fp.write(
            fetcher.open(url).read())

with open(CSS_FILE, 'w') as fp:
    print('Writing css file {}'.format(CSS_FILE))
    fp.writelines(css_code)

print('DONE')