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string or a tuple representing the physical traversal path of the context
found via traversal for this predicate to match as true. For example:
``physical_path='/'`` or ``physical_path='/a/b/c'`` or ``physical_path=('',
'a', 'b', 'c')``. This is not a path prefix match or a regex, it's a
whole-path match. It's useful when you want to always potentially show a
view when some object is traversed to, but you can't be sure about what kind
of object it will be, so you can't use the ``context`` predicate. The
individual path elements inbetween slash characters or in tuple elements
should be the Unicode representation of the name of the resource and should
not be encoded in any way.
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``config.add_view(someview, check_csrf=True)``. When the predicate is
checked, if the ``csrf_token`` value in ``request.params`` matches the csrf
token in the request's session, the view will be permitted to execute.
Otherwise, it will not be permitted to execute.
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whatsnew.
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- Added more indexing markers to sections in documentation.
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configuration file value ``prevent_http_cache``. These are synomymous and
allow you to prevent HTTP cache headers from being set by Pyramid's
``http_cache`` machinery globally in a process. see the "Influencing HTTP
Caching" section of the "View Configuration" narrative chapter and the
detailed documentation for this setting in the "Environment Variables and
Configuration Settings" narrative chapter.
- New documentation section in View Configuration narrative chapter:
"Influencing HTTP Caching".
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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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and docs for pull request
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- Modify documentation for cross-referencing.
- Use add_view(viewname) syntax rather than add_view(view=viewname)
syntax for normalization.
- Use warnings.warn rather than zope.deprecated in order to make
testing easier.
- Move tests which test deprecated methods of configurator to a
separate test case.
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redirected to ``pyramid_zcml`` locations.
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templates were removed. Use ``pyramid_sqla`` (available from PyPI) as a
generic replacement for Pylons-esque development.
- All references to ``add_handler`` and the ``handler`` ZCML directive have
been removed from the docs, and stubs which point to ``pylons_handlers``
package have replaced them.
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view config
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