fix: redownloading

`wget --timestamping` (alternatively `-N`) is now used to skip already
existing files

src/epub2go/convert.py

@@ -37,12 +37,11 @@ class GBConvert():
         self.toc = soup.find('ul').find_all('a')
     
     def save_page(self, url):
-        # TODO fix redownloading of shared content
         # https://superuser.com/questions/970323/using-wget-to-copy-website-with-proper-layout-for-offline-browsing
         command = f'''wget \
+                    --timestamping \
                     --page-requisites \
                     --convert-links \
-                    --execute \
                     --tries=5 \
                     --quiet \
                     {url}'''

src/epub2go/web.py

@@ -4,7 +4,7 @@ from django.http import HttpResponse
 from django.shortcuts import redirect, render 
 import requests
 
-import utils
+from convert import GBConvert, allbooks_url
 import json
 DEBUG = True
 ROOT_URLCONF = __name__