From aeac8143ee4b1a627365c4364b4c9eaa7ada9a0f Mon Sep 17 00:00:00 2001
From: Roberto Rosario <roberto.rosario.gonzalez@gmail.com>
Date: Tue, 7 Jul 2015 01:49:47 -0400
Subject: [PATCH] Use BytesIO instead of StringIO, the last one doesn't work
 using 'with' context.

---
 mayan/apps/document_signatures/apps.py | 9 +++------
 1 file changed, 3 insertions(+), 6 deletions(-)

diff --git a/mayan/apps/document_signatures/apps.py b/mayan/apps/document_signatures/apps.py
index bd7bfbb94e..ceb2505c5f 100644
--- a/mayan/apps/document_signatures/apps.py
+++ b/mayan/apps/document_signatures/apps.py
@@ -1,12 +1,9 @@
 from __future__ import unicode_literals
 
+import io
 import logging
 
-try:
-    from cStringIO import StringIO
-except ImportError:
-    from StringIO import StringIO
-
+from django.core.files import File
 from django.utils.translation import ugettext_lazy as _
 
 from acls import ModelPermission
@@ -40,7 +37,7 @@ def document_pre_open_hook(descriptor, instance):
             return descriptor
         else:
             descriptor.close()
-            return StringIO(result.data)
+            return io.BytesIO(result.data)
     else:
         return descriptor