springpython-developer — Mailing list for the Spring Python developer community

[Springpython-developer] A few warning about trunk's copy of petclinic

[Greg T. <gre...@mi...>]

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There are some outstanding issues in PetClinic to be aware of, mainly
due to my working on the web security parts.

1. There is bug in the "Owner" voter. It hasn't been properly
converted over to the WSGI format. If you login as "vet1", everything
works like a champ. If you login as "jblack", search for owners, and
try to drill down on any of them, you will get an exception about a
buggy line of code.

2. applicationContext.xml/petclinic.py is the only version of
petclinic that has the new security parts added in. I want to get that
stuff shook out and working perfectly before pushing out the mods to
the other version of petclinic.

3. I added one paste component to PetClinic, EvalException. It
provides a nice view of exceptions. I use Ubuntu Linux, and all I had
to do was:

% sudo apt-get install python-paste

It installed version 0.9.8. You can either install this yourself, or
pull out the "exceptionFilter" from "filterChainProxy".

I haven't necessarily decided to keep it there permanently. Don't want
to throw unnecessary dependencies on users, but it is handy for the
time being.

4. One of the next immediate things I am planning on implementing
(after fixing [1] above) is the ExceptionTranslationFilter, so that
Authentication Failure will redirect the user to a login page, and
Access Denied will redirect the user to an "Access Denied" page. The
mechanism I have right now is too clunky.

Greg
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Re: [Springpython-developer] About Web MVC feature

[Greg T. <gre...@mi...>]

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Woonsan Ko wrote:
> Hi all,
> 
> As I understand, Web MVC is not considered as a future feature.
> IMHO, the Web MVC feature should be considered because of the following reasons:
> 
>  - Most Java based spring users are very familiar to Spring Web MVC framework. Other python web
> frameworks are not familiar specially considering the configurations on components, url handler
> mappings and so on.
>  - Web frameworks such as CherryPy don't provide tightly-integrated local mode with mod_python.
> For many cases, it would be preferable to deploy python web apps under Apache local mode with
> mod_python.
>  - A python handler can do like DispatcherServlet according to applicationContext.xml, which
> defines components and mappings. And this will provide very simple approach to python web
> developers.
> 
> Any comment will be appreciated.
> Thanks!
> 
> Regards,
> 
> -Woonsan
> 

Hey Woonsan,

First of all, I want to welcome you to Spring Python!

Regarding web application development, let me give you my background on
that. I'm a software engineer by trade, and I have yet to build one at
work. I have started getting interested in web development since I got
going with this project. Basically, that means I little experience with
Spring's MVC stuff. That is my bias on that.

However, I went on build PetClinic as a web app, and have been having
fun doing that. My big push for version 0.2.0 was to get some core parts
that are the equivalent of Acegi Security into the baseline. That
included web based security. Since I had already invested effort into
Cherrypy, I decided to move further on that. If you pick through
http://springpython.python-hosting.com/wiki/ApplicationSecurity, you
will see most of that security documentation is web oriented.

Believe it or not, I am actually spending most of my Spring Python time
still working in web application development. I have been trying to
rewrite the security web components to be WSGI-compliant. I see there
are many web frameworks and I like Spring's attitude of trying to
integrate with lots of things. It seems to me that WSGI is the secret
recipe to integrating with lots of web frameworks, like Quixote, Paste,
Cherrypy, whatever. That is one of the reasons which, if you drill down
into the PetClinic sample, it is inside a "cherrypy" folder. I would
like to have alternate version of PetClinic for other systems, and be
able to demonstrate reusable components.

So basically, my sphere of influence hasn't been on Spring's MVC. But,
this is a an open source framework, and if there is demand for it, of
course we can move in that direction. I have no quarrel with it getting
in there. The parts of Spring and Acegi I have played with the most are
the parts I most readily could visualize how to get into Spring Python.
So what you see reflects what I know.

I am not opposed to implement Web MVC. It's just not at the front of my
personal list, and so far, I'm the only one coding right now!

BTW, the Spring Python site is locked down from anonymous edits to avoid
spam. I'm willing to grant other developers access on a case-by-case
basis. If you are interested in working more on this, let me know.

P.S. I am interested in where you heard about Spring Python. And did you
find out about this through java/spring channels, or through python
channels?

Greg
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[Springpython-developer] About Web MVC feature

[Woonsan Ko <woo...@ya...>]

Hi all,

As I understand, Web MVC is not considered as a future feature.
IMHO, the Web MVC feature should be considered because of the following reasons:

 - Most Java based spring users are very familiar to Spring Web MVC framework. Other python web
frameworks are not familiar specially considering the configurations on components, url handler
mappings and so on.
 - Web frameworks such as CherryPy don't provide tightly-integrated local mode with mod_python.
For many cases, it would be preferable to deploy python web apps under Apache local mode with
mod_python.
 - A python handler can do like DispatcherServlet according to applicationContext.xml, which
defines components and mappings. And this will provide very simple approach to python web
developers.

Any comment will be appreciated.
Thanks!

Regards,

-Woonsan


 
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[Springpython-developer] Welcome to the Spring Python developers mailing list

[Greg T. <gre...@mi...>]

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Spring Python is open for business.

You can find it at http://springpython.python-hosting.com/wiki (or
https). This site includes trouble ticketing, documentation, and
source code browsing.

For releases, see
http://sourceforge.net/project/showfiles.php?group_id=184275
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