[1.3.X] Fixed #16201 -- Ensure that requests with Content-Length=0 don't break the multipart parser. Thanks to albsen for the report and patch

Backport of r16353 from trunk.

git-svn-id: http://code.djangoproject.com/svn/django/branches/releases/1.3.X@16676 bcc190cf-cafb-0310-a4f2-bffc1f526a37

1 files changed, 6 insertions, 1 deletions

diff --git a/django/http/multipartparser.py b/django/http/multipartparser.py
index e45d5d1035..e3a03ff897 100644
--- a/django/http/multipartparser.py
+++ b/django/http/multipartparser.py
@@ -75,7 +75,7 @@ class MultiPartParser(object):
             # For now set it to 0; we'll try again later on down.
             content_length = 0
 
-        if content_length <= 0:
+        if content_length < 0:
             # This means we shouldn't continue...raise an error.
             raise MultiPartParserError("Invalid content length: %r" % content_length)
 
@@ -105,6 +105,11 @@ class MultiPartParser(object):
         encoding = self._encoding
         handlers = self._upload_handlers
 
+        # HTTP spec says that Content-Length >= 0 is valid
+        # handling content-length == 0 before continuing
+        if self._content_length == 0:
+            return QueryDict(MultiValueDict(), encoding=self._encoding), MultiValueDict()
+
         limited_input_data = LimitBytes(self._input_data, self._content_length)
 
         # See if the handler will want to take care of the parsing.