ANN: Nevow 0.3 released

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Valentino Volonghi aka Dialtone <dialton3#NOSPAM.JJJJKIKK at virgilio.it> wrote in message news:<mailman.4047.1096423520.5135.python-announce-list at python.org>...
> GET it here: http://www.nevow.com/releases/0.3.0/nevow-0.3.tar.gz
> 
> More Informations:
> 
> Nevow (pronounced nou-veau) is a web application construction kit written
> in Python. It is designed to allow the programmer to express as much of
> the view logic as desired in Python, and includes a pure Python XML
> expression syntax named stan to facilitate this. However it also provides
> rich support for designer-edited templates, using a very small XML
> attribute language to provide bi-directional template manipulation
> capability.
> 
> Nevow also includes formless, a declarative syntax for specifying the
> types of method parameters and exposing these methods to the web. Forms
> can be rendered automatically, and form posts will be validated and input
> coerced, rendering error pages if appropriate. Once a form post has
> validated successfully, the method will be called with the coerced values.
> 
> Finally, Nevow includes LivePage, a two-way bridge between JavaScript in
> a browser and Python on the server. For 0.3, LivePage has been updated to
> operate on Mozilla, Firefox, Windows Internet Explorer 6, and Safari on
> Mac OS X. Event handlers can be written in pure Python and JavaScript
> implementation details are hidden from the programmer, with Nevow taking
> care of routing data to and from the server using XmlHttpRequest.
> 
>     * XHTML templates: contain no programming logic, only nodes tagged
>     with nevow attributes 
>     * data/render methods: simplify the task of separating data from
>     presentation and writing view logic 
>     * stan: An s-expression-like syntax for expressing xml in pure python
>     * formless: For describing the types of objects which may be passed to
>     methods of your classes, validating and coercing string input from
>     either web or command-line sources, and calling your methods
>     automatically once validation passes 
>     * webform: For rendering web forms based on formless type
>     descriptions, accepting form posts and passing them to formless
>     validators, and rendering error forms in the event validation fails     
>     * livepage: Cross-browser JavaScript glue for sending client side
>     events to the server and server side events to the client after the
>     page has loaded, without causing the entire page to refresh
> 
> Links:
> ML: http://twistedmatrix.com/cgi-bin/mailman/listinfo/twisted-web
> Bug Tracker: http://divmod.org/users/roundup.twistd/nevow/
> IRC:  irc://irc.freenode.net/#twisted.web
> Commits: http://divmod.org/users/mailman.twistd/listinfo/nevow-commits
> 
> Homepages: 
> http://www.nevow.com
> http://www.divmod.org/Home/Projects/Nevow/index.html
> 
> What's New in Nevow 0.3:
> 
> 2004-09-26	Donovan Preston <dp at divmod.org>
> 
> 	* Added nevow.inevow.IQ interface, an interface for querying the
> 	stan DOM. Eventually, this interface will contain APIs for doing
> 	traditional DOM introspection, such as iterating children,
> 	examining tag names, and examining attributes. For now, it contains
> 	only the patternGenerator, onePattern, and allPatterns APIs. These
> 	APIs have been deprecated from Context.
> 
> 	The main benefit of this is the ability to do:
> 
> 		IQ(loaders.xmlfile(...)).patternGenerator(...)
> 
> 	which would be nice for creating "pattern library" files containing
> 	common skin idioms which can then be copied and used throughout
> 	the app.
> 
> 2004-09-25	Donovan Preston <dp at divmod.org>
> 
> 	* Chatola received a major facelift, bringing it from cool demo
> 	up to almost a full fledged web-based chat server. The helper API
> 	LiveEvil.call(...) was added, which deprecates 
> 	LiveEvil.sendScript(callJS(...))
> 
> 2004-09-23	Tommi Virtanen	<tv at twistedmatrix.com>
> 
> 	* Make guard.SessionWrapper store its URL  location in all requests it
> 	passes to its children. This allows the children know where to post
> 	the __login__ and __logout__ forms, even deep inside the resource
> 	tree (fixes issue59).
> 
> 	* Guard now works as a non-root resource, with help from the above
> 	change. Semantics of __login__ clarified in unit tests; if your guard
> 	is at /foo, posting to /foo/__login__ redirects to /foo, and posting
> 	to /foo/__login__/ redirects to /foo/. The two unit tests that failed
> 	earlier now pass (with that change in their __login__ URLs).
> 
> 	* If URL-based sessions are used, login no longer loses session
> 	information due to redirect to / (fixes issue56).
> 
> 2004-09-20	Matt Goodall <matt at pollenation.net>
> 
> 	* Added URL.secure() method to make switching between http and 
> 	https easier.
> 
> 2004-09-08	Donovan Preston	<dp at divmod.org>
> 
> 	* Nevow now includes a very simple proof-of-concept WSGI Application 
> 	implementation, and can be used with no Twisted dependency. Nevow can 
> 	also be used to write CGIs, either using a simple CGI WSGI gateway 
> 	(which supports URL traversal), or by using Page.renderString (which does not).
> 
> 	* Two new context interfaces, ICurrentSegments and IRemainingSegments, 
> 	replace the need to examine the Request prepath and postpath attributes
> 	directly.
> 
> 	* ISerializable is deprecated, and has been replaced with a simple 
> 	Flattener registry. nevow.flat.registerFlattener and 
> 	nevow.flat.getFlattener have been added to support this.
> 
> 2004-09-06	Donovan Preston	<dp at divmod.org>
> 
> 	* BACKWARDS INCOMPATIBLE CHANGE. Page.configurable_ *always* returns
> 	self, and a new Page.configurable_original *always* returns
> 	self.original. If you were relying on Page.configurable_'s
> 	introspection behavior and are now getting errors about adapting
> 	to IConfigurable, change your renderForms() calls to:
> 
> 		renderForms('original')
> 
> 	This causes Page.configurable_original to be invoked and
> 	introspected for form rendering.
> 
> 2004-08-23	Donovan Preston <dp at divmod.org>
> 
> 	* LivePage uses a simpler implementation strategy which requires
> 	the browser to make one request per output event. As a result,
> 	LivePage now works on Mozilla, Safari, and Internet Explorer Windows.
> 
> 2004-08-05	Donovan Preston <dp at divmod.org>
> 
> 	* Implemented support for IFoo(ctx) synonym syntax. It does the
> 	same thing as ctx.locate(IFoo)
> 
> 	* Removed Resource Generators, a feature of NevowSite that nobody
> 	used and wasn't really useful.
> 
> 	* Changed all inevow.IResource apis to take a Context object
> 	where they used to take the request. Remembering objects in
> 	PageContexts is now much easier, and fewer hacks are required to
> 	build the context chain. The context chain now looks like:
> 
> 		SiteContext->RequestContext->PageContext(s)->WovenContext(s)
> 
> 2004-7-28	Donovan Preston <dp at divmod.org>
> 
> 	* Parameterize data_* methods in the same way as render_* methods.
> 	Patch by k3mper.
> 
> 	For example, <div nevow:data="foo bar,baz" /> will cause 
> 	data_foo(self, bar, baz) to be called with the strings "bar" and
> 	"baz". This data method should return a callable taking ctx, data.
> 	The return value of this callable will be remembered as IData at
> 	this point in the context stack.
> 
> 	* Added list-slicing support to ListContainer. You may now use
> 	list slicing syntax in a data directive in addition to a simple
> 	index. For example:
> 
> 	def data_aList(self, ctx, data):
> 		return ["Buckle", "My", "Shoe"]
> 
> 	<div nevow:data="aList">
> 		<span nevow:data="1:-1" nevow:render="string" />
> 	</div>
> 
> 	Will render as <div><span>My</span></div>
> 
> 2004-7-20	Matt Goodall <matt at pollenation.net>
> 
> 	* Modified sax loader to retain doctypes, comments and xmlns attributes. 
> 	It's now possible to build XHTML valid pages :).
> 
> 	xmlns attributes are always kept but there are options to ignore the doctype
> 	and comment (at the request of foom, not sure why yet). Right now, the default
> 	is to retain doctypes and comments but you can use the ignoreDocType and
> 	ignoreComment args to the xml loaders and flatsax parse functions. This bit
> 	may change.
> 
> 	* Add a URL -> IResource adapter that performs a HTTP redirect. URLs can then
> 	be returned from locateChild().
> 
> 2004-06-07	Donovan Preston <dp at divmod.org>
> 
> 	* Added nevow.canvas, an experimental module similar to LivePage
> 	which provides a Python server-side API for drawing arbitrary lines,
> 	curves, and text in the browser. The implementation is socket-based
> 	and asynchronous, so the server can issue drawing commands to the
> 	client at any time.
> 
> 	The idea is to provide a server-side API to the Python programmer 
> 	and shield them from implementation details, but the current
> 	implementation uses a pre-compiled Flash movie (which never changes;
> 	we are not generating Flash bytecodes). An implementation using SVG
> 	or Safari's Canvas (nevow.canvas was written before the Safari Canvas
> 	announcement) would be possible.
> 
> 2004-05-26	Donovan Preston	<dp at divmod.org>
> 
> 	* Add URLOverlay.keep,  an API which lets you specify which query args 
> 	will be carried on from the current page render into the new URL.
> 
> 2004-05-24	Matt Goodall <matt at pollenation.net>
> 
> 	* Extracted Fragment from Page. Hopefully,  it will make it more obvious 
> 	that embedding an object with data_ and render_ methods in a stan tree is
> 	possible without using something as "heavy" as Page which is really meant
> 	to be a web resource.
> 
> 2004-05-23	Donovan Preston	<dp at divmod.org>
> 
> 	* Added some useful APIs to LiveEvil for manipulating the client-side
> 	page:
> 
> 		- flt(stan): Flatten some stan, quoting apostrophes as
> 		as appropriate for embedding in javascript
> 
> 		- set(what, to): Set the contents of the client-side node
> 		with the id 'what' to the stan 'to'.
> 
> 		- append(where, what): Append the stan 'what' to the client-
> 		side node with the id 'where'
> 
> 		- alert(what): Show an alert to the user with the text "what"