switch to faster base64 implementation

(60 ms savings on https://askiiart.net/blog/marlin-boot-animations.html, though that has very little graphics)

README.md

@@ -16,6 +16,14 @@ And also fixes any relative links to be absolute.
 
 ## Usage
 
+Install dependencies first of course
+
+```sh
+pip install -r requirements.txt
+```
+
+Then run it:
+
 ```sh
 python3 owug.py 'https://example.com' 'out.html'
 ```

owug.py

@@ -1,7 +1,7 @@
 import sys
 from bs4 import BeautifulSoup
 import requests
-import base64
+from pybase64 import b64encode_as_string
 
 
 def absolute_url(url, base_domain):
@@ -33,7 +33,7 @@ for favicon in favicons:
         url = absolute_url(favicon.attrs['href'], domain_thing)
 
         mime_type = requests.head(url).headers['Content-Type']
-        as_base64 = base64.b64encode(requests.get(url).content).decode()
+        as_base64 = b64encode_as_string(requests.get(url).content)
         new_url = f'data:{mime_type};base64,{as_base64}'
 
         favicon.attrs['href'] = new_url
@@ -43,7 +43,7 @@ imgs = soup.find_all('img')
 for item in imgs:
     url = absolute_url(item.attrs['src'], domain_thing)
     mime_type = requests.head(url).headers['Content-Type']
-    as_base64 = base64.b64encode(requests.get(url).content).decode()
+    as_base64 = b64encode_as_string(requests.get(url).content)
     new_url = f'data:{mime_type};base64,{as_base64}'
     item.attrs['src'] = new_url
 

requirements.txt

@@ -1,3 +1,4 @@
 bs4
 requests
-html5lib
+html5lib
+pybase64