Open Library integration for high-res covers 📚

Author: znedw

pythonbits/bb.py

@@ -26,6 +26,7 @@
 from . import imagehosting
 from . import goodreads
 from .googlebooks import find_cover, find_categories
+from .openlibrary import format_cover_url
 from .ffmpeg import FFMpeg
 from . import templating as bb
 from .submission import (Submission, form_field, finalize, cat_map,
@@ -1099,9 +1100,11 @@ def _render_description(self):
     @finalize
     @form_field('image')
     def _render_cover(self):
+        if(config.get('Books', 'use_openlibrary').lower() == "true"):
+            return format_cover_url('isbn', self['summary']['isbn'], 'L')
         # Goodreads usually won't give you a cover image as they don't have the
         # the right to distribute them
-        if 'nophoto' in self['summary']['image_url']:
+        elif 'nophoto' in self['summary']['image_url']:
             return find_cover(self['summary']['isbn'])
         else:
             return self['summary']['image_url']

pythonbits/openlibrary.py

@@ -0,0 +1,25 @@
+
+# -*- coding: utf-8 -*-
+
+"""
+Note, read https://openlibrary.org/dev/docs/api/covers
+The cover access by ids other than CoverID and OLID are rate-limited. 
+Currently only 100 requests/IP are allowed for every 5 minutes.
+If any IP tries to access more that the allowed limit, 
+the service will return "403 Forbidden" status.
+"""
+
+from .logging import log
+
+API_URL = 'http://covers.openlibrary.org/b/{}/{}-{}.jpg'
+
+
+"""
+key can be any one of ISBN, OCLC, LCCN, OLID and ID (case-insensitive)
+value is the value of the chosen key
+size can be one of S, M and L for small, medium and large respectively.
+"""
+
+
+def format_cover_url(key, value, size):
+    return API_URL.format(key, value, size)