Catch errors on loading pickle file

Fix for cover images without Pillow

cps/book_formats.py

@@ -64,6 +64,7 @@ except ImportError as e:
 
 try:
     from PIL import Image
+    from PIL import __version__ as PILversion
     use_PIL = True
 except ImportError:
     use_PIL = False
@@ -175,7 +176,6 @@ def pdf_preview(tmp_file_path, tmp_dir):
                             cover_file_name = os.path.splitext(tmp_file_path)[0] + ".cover.png"
                             img.save(filename=os.path.join(tmp_dir, cover_file_name))
                             return cover_file_name
-                            # img.save(obj[1:] + ".png")
             except Exception as ex:
                 print(ex)
         try:
@@ -206,4 +206,12 @@ def get_versions():
         XVersion = 'v'+'.'.join(map(str, lxmlversion))
     else:
         XVersion = _(u'not installed')
-    return {'Image Magick': IVersion, 'PyPdf': PVersion, 'lxml':XVersion, 'Wand Version': WVersion}
+    if use_PIL:
+        PILVersion = 'v' + PILversion
+    else:
+        PILVersion = _(u'not installed')
+    return {'Image Magick': IVersion,
+            'PyPdf': PVersion,
+            'lxml':XVersion,
+            'Wand': WVersion,
+            'Pillow': PILVersion}

cps/helper.py

@@ -482,11 +482,11 @@ def save_cover_from_filestorage(filepath, saved_filename, img):
 # saves book cover to gdrive or locally
 def save_cover(img, book_path):
     content_type = img.headers.get('content-type')
+
+    if use_PIL:
         if content_type not in ('image/jpeg', 'image/png', 'image/webp'):
             web.app.logger.error("Only jpg/jpeg/png/webp files are supported as coverfile")
             return False
-
-    if use_PIL:
         # convert to jpg because calibre only supports jpg
         if content_type in ('image/png', 'image/webp'):
             if hasattr(img,'stream'):
@@ -497,6 +497,10 @@ def save_cover(img, book_path):
             tmp_bytesio = io.BytesIO()
             im.save(tmp_bytesio, format='JPEG')
             img._content = tmp_bytesio.getvalue()
+    else:
+        if content_type not in ('image/jpeg'):
+            web.app.logger.error("Only jpg/jpeg files are supported as coverfile")
+            return False
 
     if ub.config.config_use_google_drive:
         tmpDir = gettempdir()

cps/web.py

@@ -201,9 +201,14 @@ lm.anonymous_user = ub.Anonymous
 app.secret_key = os.getenv('SECRET_KEY', 'A0Zr98j/3yX R~XHH!jmN]LWX/,?RT')
 db.setup_db()
 
+try:
     with open(os.path.join(config.get_main_dir, 'cps/translations/iso639.pickle'), 'rb') as f:
         language_table = cPickle.load(f)
-
+except cPickle.UnpicklingError as error:
+    app.logger.error("Can't read file cps/translations/iso639.pickle: %s", error)
+    print("Can't read file cps/translations/iso639.pickle: %s" % error)
+    helper.global_WorkerThread.stop()
+    sys.exit(1)
 
 def is_gdrive_ready():
     return os.path.exists(os.path.join(config.get_main_dir, 'settings.yaml')) and \