diff --git a/mandaye/filters/default.py b/mandaye/filters/default.py
index 5be4cb8..216070a 100644
--- a/mandaye/filters/default.py
+++ b/mandaye/filters/default.py
@@ -121,3 +121,10 @@ class MandayeFilter(object):
         values['account'] = current_account
         return template_response("toolbar.html", values)
 
+    @staticmethod
+    def store_request_content_buffer(env, values, request):
+        """ on_request filter which allows to store the content of a post in request object
+        """
+        if request.msg and not isinstance(request.msg, basestring):
+            request.msg = request.msg.read()
+