Return date in RFC-3339 fromat on upload credentials endpoint

resolwe/storage/utils.py

@@ -0,0 +1,12 @@
+"""Storage Utils."""
+
+
+def iso8601_to_rfc3339(iso_string):
+    """Convert ISO8601 to RFC3339 format."""
+    if "+" in iso_string or "-" in iso_string:
+        offset_sign = "+" if "+" in iso_string else "-"
+        date_time, offset = iso_string.split(offset_sign)
+        offset = offset[:2] + ":" + offset[2:]
+        return date_time + offset_sign + offset
+
+    return iso_string

resolwe/storage/views.py

@@ -31,6 +31,7 @@
 from resolwe.storage.connectors import connectors
 from resolwe.storage.connectors.baseconnector import BaseStorageConnector
 from resolwe.storage.models import FileStorage, ReferencedPath
+from resolwe.storage.utils import iso8601_to_rfc3339
 from resolwe.test.utils import ignore_in_tests
 
 logger = logging.getLogger(__name__)
@@ -79,7 +80,7 @@ def get(self, request, *args, **kwargs):
             "AccessKeyId": credentials["AccessKeyId"],
             "SecretAccessKey": credentials["SecretAccessKey"],
             "Token": credentials["SessionToken"],
-            "Expiration": credentials["Expiration"],
+            "Expiration": iso8601_to_rfc3339(credentials["Expiration"]),
         }
         return Response(self.serializer_class(response).data)