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parameter.
When you supply an ``http_cache`` value to a view configuration, the
``Expires`` and ``Cache-Control`` headers of a response generated by the
associated view callable are modified. The value for ``http_cache`` may be
one of the following:
- A nonzero integer. If it's a nonzero integer, it's treated as a number
of seconds. This number of seconds will be used to compute the
``Expires`` header and the ``Cache-Control: max-age`` parameter of
responses to requests which call this view. For example:
``http_cache=3600`` instructs the requesting browser to 'cache this
response for an hour, please'.
- A ``datetime.timedelta`` instance. If it's a ``datetime.timedelta``
instance, it will be converted into a number of seconds, and that number
of seconds will be used to compute the ``Expires`` header and the
``Cache-Control: max-age`` parameter of responses to requests which call
this view. For example: ``http_cache=datetime.timedelta(days=1)``
instructs the requesting browser to 'cache this response for a day,
please'.
- Zero (``0``). If the value is zero, the ``Cache-Control`` and
``Expires`` headers present in all responses from this view will be
composed such that client browser cache (and any intermediate caches) are
instructed to never cache the response.
- A two-tuple. If it's a two tuple (e.g. ``http_cache=(1,
{'public':True})``), the first value in the tuple may be a nonzero
integer or a ``datetime.timedelta`` instance; in either case this value
will be used as the number of seconds to cache the response. The second
value in the tuple must be a dictionary. The values present in the
dictionary will be used as input to the ``Cache-Control`` response
header. For example: ``http_cache=(3600, {'public':True})`` means 'cache
for an hour, and add ``public`` to the Cache-Control header of the
response'. All keys and values supported by the
``webob.cachecontrol.CacheControl`` interface may be added to the
dictionary. Supplying ``{'public':True}`` is equivalent to calling
``response.cache_control.public = True``.
Providing a non-tuple value as ``http_cache`` is equivalent to calling
``response.cache_expires(value)`` within your view's body.
Providing a two-tuple value as ``http_cache`` is equivalent to calling
``response.cache_expires(value[0], **value[1])`` within your view's body.
If you wish to avoid influencing, the ``Expires`` header, and instead wish
to only influence ``Cache-Control`` headers, pass a tuple as ``http_cache``
with the first element of ``None``, e.g.: ``(None, {'public':True})``.
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to depend on WebTest, and 2 tests failed as the result of changes to
Pyramid itself. These issues have been fixed.
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and the ``renderer_globals`` Configurator constructor parameter.
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preprocessor to be specified as a Python callable or Python dotted name.
See https://github.com/Pylons/pyramid/pull/183 for rationale.
Closes #183.
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webob.exc.WSGIHTTPException (convenience).
- Use ``exc.message`` in docs rather than ``exc.args[0]`` now that
we control this.
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- Fix Configurator docstring wrt exception responses.
- Speed up registry.queryAdapterOrSelf
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abstraction.
- It is now possible to return an arbitrary object from a Pyramid view
callable even if a renderer is not used, as long as a suitable adapter to
``pyramid.interfaces.IResponse`` is registered for the type of the returned
object. See the section in the Hooks chapter of the documentation entitled
"Changing How Pyramid Treats View Responses".
- The Pyramid router now, by default, expects response objects returned from
view callables to implement the ``pyramid.interfaces.IResponse`` interface.
Unlike the Pyramid 1.0 version of this interface, objects which implement
IResponse now must define a ``__call__`` method that accepts ``environ``
and ``start_response``, and which returns an ``app_iter`` iterable, among
other things. Previously, it was possible to return any object which had
the three WebOb ``app_iter``, ``headerlist``, and ``status`` attributes as
a response, so this is a backwards incompatibility. It is possible to get
backwards compatibility back by registering an adapter to IResponse from
the type of object you're now returning from view callables. See the
section in the Hooks chapter of the documentation entitled "Changing How
Pyramid Treats View Responses".
- The ``pyramid.interfaces.IResponse`` interface is now much more extensive.
Previously it defined only ``app_iter``, ``status`` and ``headerlist``; now
it is basically intended to directly mirror the ``webob.Response`` API,
which has many methods and attributes.
- Documentation changes to support above.
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method which implements the WSGI application interface
instead of the three webob attrs status, headerlist
and app_iter. Backwards compatibility exists for
code which returns response objects that do not
have a __call__.
- pyramid.response.Response is no longer an exception
(and therefore cannot be raised in order to generate
a response).
- Changed my mind about moving stuff from pyramid.httpexceptions
to pyramid.response. The stuff I moved over has been moved
back to pyramid.httpexceptions.
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Also add functional tests to the Wiki2 tutorial, similar to Wiki1.
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``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
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