add six to check for python 2 or 3 specific implementation (#48)

* StringIO imports differently in python 3 - use six for compatibility

* Paste requires bytes like objects.  in python 2 cStringIO works fine, but in python three it needs to use io.BytesIO

* simplify imports and logic by using six.BytesIO exclusively for parsing body content

1 files changed, 4 insertions, 2 deletions

diff --git a/paste/cascade.py b/paste/cascade.py
index e1e8235..3f6b661 100644
--- a/paste/cascade.py
+++ b/paste/cascade.py
@@ -8,7 +8,7 @@ return ``404 Not Found``.
 from paste import httpexceptions
 from paste.util import converters
 import tempfile
-from six.moves import cStringIO as StringIO
+from six import BytesIO
 
 __all__ = ['Cascade']
 
@@ -104,7 +104,9 @@ class Cascade(object):
                         copy_len -= len(chunk)
                 f.seek(0)
             else:
-                f = StringIO(environ['wsgi.input'].read(length))
+                f = BytesIO(environ['wsgi.input'].read(length))
+
+
             environ['wsgi.input'] = f
         else:
             copy_wsgi_input = False