diff options
Diffstat (limited to 'docs/narr')
| -rw-r--r-- | docs/narr/hooks.rst | 36 |
1 files changed, 36 insertions, 0 deletions
diff --git a/docs/narr/hooks.rst b/docs/narr/hooks.rst index d620b5672..aa151d281 100644 --- a/docs/narr/hooks.rst +++ b/docs/narr/hooks.rst @@ -522,6 +522,42 @@ The default context URL generator is available for perusal as the class :term:`Pylons` GitHub Pyramid repository. .. index:: + single: IResponder + +.. _using_iresponder: + +Changing How Pyramid Treats Response Objects +-------------------------------------------- + +It is possible to control how the Pyramid :term:`router` calls the WSGI +``start_response`` callable and obtains the WSGI ``app_iter`` based on +adapting the response object to the :class: `pyramid.interfaces.IResponder` +interface. The default ``IResponder`` uses the three attributes ``status``, +``headerlist``, and ``app_iter`` attached to the response object, and calls +``start_response`` with the status and headerlist, returning the +``app_iter``. 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='') + +Overriding makes it possible to reuse response object implementations which +have, for example, their own ``__call__`` expected to be used as a WSGI +application (like :class:`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 + +.. index:: single: view mapper .. _using_a_view_mapper: |