From 18349a053f917de4557a6be5953f6ec7151d749d Mon Sep 17 00:00:00 2001
From: ptone <preston@ptone.com>
Date: Fri, 4 Nov 2011 00:11:22 -0700
Subject: [PATCH] Try to better handle being passed a open file with write mode
 enabled

such as would be the case with tempfile.mkstemp etc
---
 imagekit/utils.py | 6 ++++++
 1 file changed, 6 insertions(+)

diff --git a/imagekit/utils.py b/imagekit/utils.py
index 07cd532..f758e88 100644
--- a/imagekit/utils.py
+++ b/imagekit/utils.py
@@ -1,3 +1,4 @@
+import os
 import tempfile
 import types
 
@@ -31,6 +32,11 @@ def get_spec_files(instance):
 
 
 def open_image(target):
+    if hasattr(target, 'mode') and 'w' in target.mode and os.path.exists(target.name):
+        # target is a file like object with write mode enabled
+        # PIL will zero this file out and then give and IO error
+        # instead just pass PIL the path
+        target = target.name
     img = Image.open(target)
     img.copy = types.MethodType(_wrap_copy(img.copy), img, img.__class__)
     return img