be more tolerant of bad CONTENT_LENGTH1.5.1

2 files changed, 10 insertions, 1 deletions

diff --git a/docs/news.txt b/docs/news.txt
index 5eb1c5b..96a1ab6 100644
--- a/docs/news.txt
+++ b/docs/news.txt
@@ -3,6 +3,12 @@ News
 
 .. contents::
 
+svn trunk
+---------
+
+* Make ``paste.cascade`` more tolerant of a missing or invalid
+  Content-Length.
+
 1.5
 ---
 
diff --git a/paste/cascade.py b/paste/cascade.py
index d939e4a..adb0907 100644
--- a/paste/cascade.py
+++ b/paste/cascade.py
@@ -76,7 +76,10 @@ class Cascade(object):
                 return _consuming_writer
             return start_response(status, headers, exc_info)
 
-        length = int(environ.get('CONTENT_LENGTH', '0'))
+        try:
+            length = int(environ.get('CONTENT_LENGTH', 0) or 0)
+        except ValueError:
+            length = 0
         if length > 0:
             # We have to copy wsgi.input
             copy_wsgi_input = True