Merge pull request #2239 from jerneju/value-addons-urllib

[FIX] Add-ons: Handling ValueError due to connection problems

Orange/canvas/application/addons.py

@@ -1,6 +1,7 @@
 import sys
 import sysconfig
 import os
+import logging
 import re
 import errno
 import shlex
@@ -46,6 +47,8 @@
                         OSX_NSURL_toLocalFile
 from ..help.manager import get_dist_meta, trim, parse_meta
 
+log = logging.getLogger(__name__)
+
 OFFICIAL_ADDONS = [
     "Orange-Bioinformatics",
     "Orange3-DataFusion",
@@ -492,13 +495,14 @@ def _set_packages(self, f):
 
         try:
             packages = f.result()
-        except (IOError, OSError) as err:
+        except (IOError, OSError, ValueError) as err:
             message_warning(
                 "Could not retrieve package list",
                 title="Error",
                 informative_text=str(err),
                 parent=self
             )
+            log.error(str(err), exc_info=True)
             packages = []
         except Exception:
             raise