Switch to using OpenLibrary as the primary source of book covers. Should speed up cover fetching. Also Fix #2316 (Calibre now fetches smaller images as covers)

src/calibre/ebooks/metadata/library_thing.py

@@ -4,13 +4,15 @@ __copyright__ = '2008, Kovid Goyal <kovid at kovidgoyal.net>'
 Fetch cover from LibraryThing.com based on ISBN number.
 '''
 
-import sys, socket, os, re, mechanize
+import sys, socket, os, re
 
 from calibre import browser as _browser
 from calibre.utils.config import OptionParser
 from calibre.ebooks.BeautifulSoup import BeautifulSoup
 browser = None
 
+OPENLIBRARY = 'http://covers.openlibrary.org/b/isbn/%s-L.jpg?default=false'
+
 class LibraryThingError(Exception):
     pass
 
@@ -32,13 +34,19 @@ def login(username, password, force=True):
     browser.submit()
 
 
-def cover_from_isbn(isbn, timeout=5.):
+def cover_from_isbn(isbn, timeout=5., username=None, password=None):
     global browser
     if browser is None:
         browser = _browser()
     _timeout = socket.getdefaulttimeout()
     socket.setdefaulttimeout(timeout)
     src = None
+    try:
+        return browser.open(OPENLIBRARY%isbn).read(), 'jpg'
+    except:
+        pass # Cover not found
+    if username and password:
+        login(username, password, force=False)
     try:
         src = browser.open('http://www.librarything.com/isbn/'+isbn).read().decode('utf-8', 'replace')
     except Exception, err:
@@ -55,7 +63,7 @@ def cover_from_isbn(isbn, timeout=5.):
         url = url.find('img')
         if url is None:
             raise LibraryThingError(_('LibraryThing.com server error. Try again later.'))
-        url = re.sub(r'_SX\d+', '', url['src'])
+        url = re.sub(r'_S[XY]\d+', '', url['src'])
         cover_data = browser.open(url).read()
         return cover_data, url.rpartition('.')[-1]
     finally:
@@ -81,13 +89,8 @@ def main(args=sys.argv):
         parser.print_help()
         return 1
     isbn = args[1]
-    if opts.username and opts.password:
-        try:
-            login(opts.username, opts.password)
-        except mechanize.FormNotFoundError:
-            raise LibraryThingError(_('LibraryThing.com server error. Try again later.'))
-        
-    cover_data, ext = cover_from_isbn(isbn)
+    cover_data, ext = cover_from_isbn(isbn, username=opts.username,
+            password=opts.password)
     if not ext:
         ext = 'jpg'
     oname = os.path.abspath(isbn+'.'+ext)

src/calibre/gui2/dialogs/metadata_single.py

@@ -20,7 +20,7 @@ from calibre.gui2.dialogs.password import PasswordDialog
 from calibre.gui2.widgets import ProgressIndicator
 from calibre.ebooks import BOOK_EXTENSIONS
 from calibre.ebooks.metadata import authors_to_sort_string, string_to_authors, authors_to_string
-from calibre.ebooks.metadata.library_thing import login, cover_from_isbn
+from calibre.ebooks.metadata.library_thing import cover_from_isbn
 from calibre import islinux
 from calibre.ebooks.metadata.meta import get_metadata
 from calibre.utils.config import prefs
@@ -60,9 +60,8 @@ class CoverFetcher(QThread):
                     return
                 self.isbn = results[0]
 
-            if self.username and self.password:
-                login(self.username, self.password, force=False)
-            self.cover_data = cover_from_isbn(self.isbn, timeout=self.timeout)[0]
+            self.cover_data = cover_from_isbn(self.isbn, timeout=self.timeout,
+                    username=self.username, password=self.password)[0]
         except Exception, e:
             self.exception = e
             self.traceback = traceback.format_exc()

src/calibre/gui2/dialogs/metadata_single.ui

@@ -589,7 +589,7 @@
                    <item>
                     <widget class="QPushButton" name="fetch_cover_button">
                      <property name="text">
-                      <string>Fetch &amp;cover image from server</string>
+                      <string>Download &amp;cover image</string>
                      </property>
                     </widget>
                    </item>

src/calibre/web/feeds/news.py

@@ -265,7 +265,7 @@ class BasicNewsRecipe(object, LoggingInterface):
 
     def get_feeds(self):
         '''
-        Return a list of :term:RSS feeds to fetch for this profile. Each element of the list
+        Return a list of :term:`RSS` feeds to fetch for this profile. Each element of the list
         must be a 2-element tuple of the form (title, url). If title is None or an
         empty string, the title from the feed is used. This method is useful if your recipe
         needs to do some processing to figure out the list of feeds to download. If