On Sat, Jun 20, 2009 at 15:47, Pierre Quentel<quentel.pierre在wanadoo.fr> wrote:
>
> Hi all,
>
> I have just published version3.0 on the sourceforge site. Here is the
> message I published on comp.lang.py.announce :
>

soooooo great!
Karrigell change powerded!
but never lost running in place ~ the best future!

> I am glad to announce the version 3.0 of the Python web framework
> Karrigell
>
> Karrigell has been around since 2002 and after numerous versions,
> until 2.4.0 last year, it needed a complete rewriting. Some modules
> had been written long ago, using out-of-date patterns ; the global
> architecture needed cleaning up, to replace an accumulation of modules
> added one release after the other ; most important, the previous
> versions were unable to run reliably in a multithreaded environment,
> which was a serious limitation for professional web developement
>
> The decision was taken more than one year ago to rewrite almost
> everything, while stricking to the same guidelines of simplicity for
> the programmer and administrator :
> - no configuration needed to get started : just unzip the package and
> run "python Karrigell.py" to start the built-in web server
> - URLs match scripts in the file system
> - no imposed ORM, templating engine : all you need to know is Python
> and HTML, plus a few built-in names for access to environment, form
> data, etc
> - the most usual tasks in web programing (sessions, user management,
> redirection, etc) are accessible though built-in functions and
> exceptions with a very intuitive syntax : Session() returns the
> session object, Login() checks if a user is logged in and redirects to
> a login page otherwise, "raise HTTP_REDIRECTION, url" redirects to the
> specified url, etc
> - clear debugging info
> - a choice between a variety of coding styles : while the recommended
> way is to use "Karrigell services" (Python scripts with the whole
> logic of a web application in one script), other options are possible,
> including a PHP-like format with Python code inside HTML markup
>
> The most efficient and flexible way to run Karrigell is to use the
> built-in multithreaded or multi-process web server ; for Windows user,
> an exe file is available and allows running the framework from a USB
> key on any machine, even if no Python interpreter is installed. The
> built-in server has been tested by hundreds of users on all possible
> configurations, it is robust, reliable and fast enough for 99% of web
> sites
>
> Of course, it can also be integrated to other web servers, with a
> special effort on Apache integration (CGI mode, mod_python) ; you can
> also configure your server to serve static files and proxy the
> requests to the built-in server
>
> Karrigell does not impose anything on database choice : since scripts
> are pure Python, any db engine with a Python API can be used, either
> directly or through an ORM like SQLAlchemy. All template engines are
> also supported
>
> Though it's an almost complete rewriting, the syntax remains almost
> 100% compatible with previous versions. Migrating from 2.x to 3.0
> should be easy (much easier than from Python 2.x to 3.0). The two main
> changes, introduced for multithread support, are relative to :
> - relative paths in the file system : in previous versions, they were
> converted to absolute path relative to the script's path ; in version
> 3.0, they must be converted by a built-in function REL()
> - import of user-defined modules : instead of the standard Python
> statement "import foo", the syntax is now foo = Import("foo")
> A tool to detect potential migration issues in provided in the package
>
> I thank all the people on the Karrigell group who helped by their
> advices, suggestions, criticisms, and lines of code
>
> Enjoy !
>
> - Pierre




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