Use the store to upload exported disk

circle/vm/operations.py

@@ -360,8 +360,18 @@ class ExportDiskOperation(InstanceOperation):
     accept_states = ('STOPPED',)
     async_queue = 'localhost.man.slow'
 
-    def _operation(self, disk, format):
-        disk.export(format)
+    def check_auth(self, user):
+        super(ExportDiskOperation, self).check_auth(user)
+        try:
+            Store(user)
+        except NoStoreException:
+            raise PermissionDenied
+
+    def _operation(self, user, disk, format):
+        store = Store(user)
+        store.new_folder('/export')
+        upload_link = store.request_upload('/export')
+        disk.export(format, upload_link)
 
 
 @register_operation