Don't let unicode get through raw_interactive without an error

1 files changed, 4 insertions, 0 deletions

diff --git a/paste/wsgilib.py b/paste/wsgilib.py
index a838587..dc170e3 100644
--- a/paste/wsgilib.py
+++ b/paste/wsgilib.py
@@ -227,6 +227,10 @@ def raw_interactive(application, path='', raise_on_wsgi_error=False,
     try:
         try:
             for s in app_iter:
+                if not isinstance(s, str):
+                    raise ValueError(
+                        "The app_iter response can only contain str (not "
+                        "unicode); got: %r" % s)
                 headers_sent.append(True)
                 if not headers_set:
                     raise AssertionError("Content sent w/o headers!")