general: use system feedparser module (#6292)

wcs/qommon/backoffice/root.py

@@ -28,8 +28,12 @@ from quixote.directory import Directory, AccessControlled
 from quixote import get_publisher, get_request, get_response
 from quixote.html import htmltext, TemplateIO
 
+try:
+    import feedparser
+except ImportError:
+    feedparser = None
+
 from qommon import errors
-from qommon.vendor import feedparser
 from qommon.storage import atomic_write
 
 class BackofficeRootDirectory(AccessControlled, Directory):
@@ -84,6 +88,8 @@ class BackofficeRootDirectory(AccessControlled, Directory):
         return os.path.join(get_publisher().app_dir, 'feed-' + md5_hash.hexdigest())
 
     def get_sidebar(self):
+        if feedparser is None:
+            return None
         feed_url = self.get_feed_url(get_request().language)
         if not feed_url:
             return None

wcs/qommon/form.py

@@ -31,7 +31,7 @@ import json
 from storage import atomic_write
 
 try:
-    from vendor.feedparser import _sanitizeHTML
+    from feedparser import _sanitizeHTML
 except ImportError:
     _sanitizeHTML = None