- It is now possible to control how the Pyramid router calls the WSGI

  ``start_response`` callable and obtains the WSGI ``app_iter`` based on
  adapting the response object to the new ``pyramid.interfaces.IResponder``
  interface.  The default ``IResponder`` uses Pyramid 1.0's logic to do this.
  To override the responder::

     from pyramid.interfaces import IResponder
     from pyramid.response import Response
     from myapp import MyResponder

     config.registry.registerAdapter(MyResponder, (Response,),
                                     IResponder, name='')

  This makes it possible to reuse response object implementations which have,
  for example, their own ``__call__`` expected to be used as a WSGI
  application (like ``pyramid.response.Response``), e.g.:

     class MyResponder(object):
         def __init__(self, response):
             """ Obtain a reference to the response """
             self.response = response
         def __call__(self, request, start_response):
             """ Call start_response and return an app_iter """
             app_iter = self.response(request.environ, start_response)
             return app_iter

1 files changed, 26 insertions, 0 deletions

diff --git a/CHANGES.txt b/CHANGES.txt
index 15c86c13c..7840bc525 100644
--- a/CHANGES.txt
+++ b/CHANGES.txt
@@ -132,6 +132,32 @@ Features
 - The ``pyramid.request.Response`` class now has a ``RequestClass`` interface
   which points at ``pyramid.response.Request``.
 
+- It is now possible to control how the Pyramid router calls the WSGI
+  ``start_response`` callable and obtains the WSGI ``app_iter`` based on
+  adapting the response object to the new ``pyramid.interfaces.IResponder``
+  interface.  The default ``IResponder`` uses Pyramid 1.0's logic to do this.
+  To override the responder::
+
+     from pyramid.interfaces import IResponder
+     from pyramid.response import Response
+     from myapp import MyResponder
+
+     config.registry.registerAdapter(MyResponder, (Response,),
+                                     IResponder, name='')
+
+  This makes it possible to reuse response object implementations which have,
+  for example, their own ``__call__`` expected to be used as a WSGI
+  application (like ``pyramid.response.Response``), e.g.:
+
+     class MyResponder(object):
+         def __init__(self, response):
+             """ Obtain a reference to the response """
+             self.response = response
+         def __call__(self, request, start_response):
+             """ Call start_response and return an app_iter """
+             app_iter = self.response(request.environ, start_response)
+             return app_iter
+
 Bug Fixes
 ---------