Hi all,
The version 0.3.0 of the Nagare web framework is now released !
To read about its features:
http://www.nagare.org/trac/wiki/NagareFeatures
Release info and download page:
http://pypi.python.org/pypi/nagare
Release info and download page of the examples:
http://pypi.python.org/pypi/nagare.examples
Source and documentation available at the website:
http://www.nagare.org
Mailing lists - the place to ask questions:
http://groups.google.com/group/nagare-users
About Nagare
Nagare is a components based framework: a Nagare application
is a composition of interacting components each one with its
own state and workflow kept on the server. Each component
can have one or several views that are composed to generate
the final web page. This enables the developers to reuse or
write highly reusable components easily and quickly.
Thanks to Stackless Python, Nagare is also a continuation-based
web framework which enables to code a web application like a
desktop application, with no need to split its control flow in
a multitude of controllers and with the automatic handling of
the back, fork and refresh actions from the browser.
Its component model and use of the continuation come from the
famous Seaside Smalltalk framework.
Furthermore Nagare integrates the best tools and standard from
the Python world. For example:
- WSGI: binds the application to several possible publishers,
- lxml: generates the DOM trees and brings to Nagare the full
set of XML features (XSL, XPath, Schemas ...),
- setuptools: installs, deploys and extends the Nagare framework
and the Nagare applications too,
- PEAK Rules: generic methods are heavily used in Nagare, to
associate views to components, to define security rules, to
translate Python code to Javascript ...
- WebOb: for its Request and Response Objects.
Examples
A complete guess a number game to taste how easy web coding
becomes using continuations:
import random
from nagare import component, util
class Number(component.Task):
A little game to guess a number
def go(self, comp):
The game algorithm, using continuation for a pure linear Python
code
In:
- ``comp`` -- this component
self.attempt = 1
number = random.randint(1, 20)
comp.call(util.Confirm('I choose a number between 1 and 20. Try to
guess it'))
while True:
x = comp.call(util.Ask('Try #%d: ' % self.attempt))
if not x.isdigit():
continue
x = int(x)
if x number:
comp.call(util.Confirm('Choose a lower number'))
if x number:
comp.call(util.Confirm('Choose a greater number'))
if x == number:
comp.call(util.Confirm('You guessed the number in %d
attempts' % self.attempt))
break
self.attempt += 1
A simple todo list, illustrating the programmatic HTML generation,
the association of view(s) to Python objects and the direct association
of callbacks to HTML form elements and links:
from nagare import presentation
from nagare.namespaces import xhtml
# A plain Python ``TodoList`` class
class TodoList(object):
def __init__(self):
self.todo = []
def add_todo(self, msg):
self.todo.append(msg)
# The default HTML view, generated in programmatic HTML
@presentation.render_for(TodoList)
def render(self, h, comp, model):
# ``h`` is a (X)HTML renderer
(http://www.nagare.org/trac/wiki/RendererObjects)
with h.div:
for msg in self.todo:
h h.blockquote(msg) h.hr
with h.form:
h 'New todo:' h.br
h h.textarea.action(self.add_todo) h.br
h h.input(type='submit', value='Add')
return h.root
0.3.0 Changelog
===
New features
- refactoring of the sessions managers:
- session objects now keep track of their sessions manager
- no more sessions manager factories
- configurable pickler / unpickler objects
- configuration switch ``states_history`` to set if an objects graphs
history must be kept
- new sessions manager (``type=memory``) that keeps the objects graphs in
memory, without any pickling
- logging service added:
- one dedicated logger for each published applications is created
- easy configuration and use of this dedicated logger
- all the ``[logging]`` sections of all the published applications are
merged before to configure the Python logging system
- preliminary Comet support added (currently only working in a multi-threaded
env.)
- last exception raised kept by the ``WSGIApp`` objects and exception hook
added
-
