Update get_file_size() to support S3 storage backend

refinery/core/models.py

@@ -674,9 +674,7 @@ def get_file_size(self):
             study__in=investigation.study_set.all(), file_uuid__isnull=False
         ).values_list('file_uuid', flat=True)
         file_items = FileStoreItem.objects.filter(uuid__in=file_uuids)
-        return sum(
-            [item.get_file_size(report_symlinks=True) for item in file_items]
-        )
+        return sum([item.get_file_size() for item in file_items])
 
     def share(self, group, readonly=True, readmetaonly=False):
         # change: !readonly & !readmetaonly, read: readonly & !readmetaonly

refinery/file_store/models.py

@@ -19,6 +19,7 @@
 from django.db.models.signals import post_delete
 from django.dispatch import receiver
 
+import botocore
 import celery
 from django_extensions.db.fields import UUIDField
 
@@ -145,21 +146,16 @@ def get_absolute_path(self):
         else:
             return None
 
-    def get_file_size(self, report_symlinks=False):
-        """Return the size of the file in bytes.
-        report_symlinks: report the size of symlinked files or not
-        returns zero if the file is:
-        - not local
-        - a symlink and report_symlinks=False
+    def get_file_size(self):
+        """Return the size of the file in bytes or zero if the file is not
+        available
         """
-        if self.is_symlinked() and not report_symlinks:
-            return 0
-
         try:
             return self.datafile.size
         except ValueError:  # file is not local
             return 0
-        except OSError as exc:
+        except (OSError, botocore.exceptions.ClientError,
+                botocore.exceptions.ParamValidationError) as exc:
             # file should be there but it is not
             logger.critical("Error getting size for '%s': %s", self, exc)
             return 0