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@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@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@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@pollenation.net> * Added URL.secure() method to make switching between http and https easier. 2004-09-08 Donovan Preston <dp@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@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@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@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@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@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@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@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@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@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" -- Valentino Volonghi aka Dialtone Linux User #310274, Proud Gentoo User Blog: http://vvolonghi.blogspot.com Home Page: http://xoomer.virgilio.it/dialtone/