In data_source renderer hide and log exceptions in update_content() (fixes #5584)

src/cmsplugin_blurp/renderers/data_source.py

@@ -220,8 +220,13 @@ class Data(object):
             log.warning(error)
             return None, error
 
-
     def update_content(self):
+        try:
+            return self.update_content_real()
+        except:
+            log.exception('exception while updating content')
+
+    def update_content_real(self):
         if self.url.startswith('http'):
             stream, error = self.resolve_http_url()
         elif self.url.startswith('file:'):