[mod_python] FieldStorage and POST?

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smilelover at centrum.cz wrote ..
> Dne Wed, 05 Jul 2006 00:10:20 +0200 napsal(a) Graham Dumpleton  
> <grahamd at dscpl.com.au> následující zprávu:
> 
> > smilelover at centrum.cz wrote ..
> >> Hi,
> >> I can't make FieldStorage instance give me my POST arguments.
> >> When I send my form data through GET, FieldStorage contains them. But
> >> when
> >> I use POST and then do:
> >>
> >> req.write(util.FieldStorage(req).list[0].value)
> >>
> >> Python tells me "list index out of range"
> >> I have googled quite a lot and found bits of information about problems
> >> with POST and FieldStorage, but nothing that could help me figure out
> >> WHERE the POST data are.
> >>
> >> Thanks in advance for every hint.
> >
> > Are you doing this from inside a function published using
> > mod_python.publisher, as opposed to a basic handler? If
> > you are doing this from inside a function published using
> > mod_python.publisher then it will already have consumed
> > the POST content of the request.
> >
> > Thus, show more complete code for the function this is being
> > done in and show the Apache configuration you are using to
> > trigger that function. Also show what URL you are using and
> > how that relates to the names of your handler files or whether
> > the URL matches to the directory itself.
> >
> > If you are using mod_python.publisher, the form parameters
> > are supplied to argument to function of same name. The raw
> > FieldStorage object can also be accessed as req.form, you do not
> > need to create it yourself.
> >
> > Graham
> 
> Yes, I'm working with publisher. I have a module "admin.py" that contains
> several funcs - it's a small CMS. On one page I choose articles I want
> to  
> delete and submit the form to the following function:
> 
> def delete(req):
> 	sess = Session.Session(req)
> 	if not sess.has_key('login_name'):
> 		util.redirect(req, 'index?unauth=1')
> 	
> 	req.content_type = 'text/html'
> 	req.write(util.FieldStorage(req).list[0].value) # this is a line just
> to  
> find out what's happening
> 	return
> 
> My .htaccess is pretty simple:
> SetHandler mod_python
> PythonHandler mod_python.publisher
> PythonDebug On
> 
> Yes I know arguments are passed thru function argumens, but the count of
> my args is dynamic...should I just use **params?

If the number of form arguments can vary and not sensible to have default
values of None if a function argument is used, the using '**params' is
generally an acceptable way of doing it.

> Or is it better to do it all through req.form? (I don't see it in the 
> Request object docs thou)

It is put there by mod_python.publisher handler.

Read:

  http://www.modpython.org/live/current/doc-html/node94.html

  Since a FieldStorage can only be instantiated once per request, one must
  not attempt to instantiate FieldStorage when using the Publisher handler
  and should use Request.form instead.

Graham