Fw: select multiple
This is the original email I sent out, regarding my multiple selects... S.T.O.U.T. = Synthetic Technician Optimized for Ultimate Troublshooting - Original Message - From: Dennis Stout [EMAIL PROTECTED] To: [EMAIL PROTECTED] Sent: Thursday, July 10, 2003 11 39 Subject: select multiple Beginners-CGI; If I have a form with a lot of values (such as Tech ID, Tech Name, Tech Queues..) and one of the fields is a select multiple, with a varied amount of options selected, how are those values sent to the cgi script? Is it something like ?queue=lvl1,lvl2,admin,sysadfoo=bar or what? Thanks Dennis -- To unsubscribe, e-mail: [EMAIL PROTECTED] For additional commands, e-mail: [EMAIL PROTECTED]
Re: select multiple
Because there is no way to create a delimiter that the potential data
doesn't contain, the browser doesn't have the option to choose an arbitrary
delimiter like a comma, or the like. So (though I can't speak for all
browsers most will do the same) each value is passed with the same key, so
your string ends up like:
?queue=lvl1queue=lvl2queue=adminqueue=sysadfoo=bar
This punts the problem to the server side (or whatever does the query string
parsing) so there are multiple ways to handle it, build a complex data
structure that stores an array reference for any multi-valued keys, store the
keys with some known delimiter (aka cgi-lib.pl used to use the null character
\0). So it depends on your request parser, some provide multiple manners (I
think the standard CGI does). Have a look at the respective docs for how your
parser handles it, unless you are writing a parser...but then why do that with
so many good freely available ones?
Interesting.
So in mod_perl, I would use $r-args{__what__} to get to it? Heh.
I'll email the mod_perl list..
Dennis
Re: select multiple
CGI.pm does the trick for me, the multi values are seperated by \0
select name=yadda multi
optionyadda1
optionyadda2
optionyadda3
/select
my $CGI = new CGI();
%form_data = $CGI-Vars;
@options = split(\0,$form_data{'yadda'});
$options[0] = yadda1, $options[1] = yadda2 etc .
Not usable live code obviously, but you should see the idea...
-Chris
- Original Message -
From: Dennis Stout [EMAIL PROTECTED]
To: [EMAIL PROTECTED]; [EMAIL PROTECTED];
[EMAIL PROTECTED]
Sent: Thursday, July 10, 2003 4:52 PM
Subject: Re: select multiple
Interesting.
So in mod_perl, I would use $r-args{__what__} to get to it? Heh.
I'll email the mod_perl list..
Dennis
Re: select multiple
ARHG.
I want to stay as far away from use CGI; as possible =/
*sigh*
mod_perl and the methods available in the apache request object shuold beable
to replace CGI.pm entirely, especially when you have a highly customized
RequestHandler :/
Guess I'll see what happens, since I need cookie headers to work AND now
multiple values for one param.
S.T.O.U.T. = Synthetic Technician Optimized for Ultimate Troublshooting
- Original Message -
From: Chris Faust [EMAIL PROTECTED]
To: Dennis Stout [EMAIL PROTECTED]; [EMAIL PROTECTED];
[EMAIL PROTECTED]; [EMAIL PROTECTED]
Sent: Thursday, July 10, 2003 16 30
Subject: Re: select multiple
CGI.pm does the trick for me, the multi values are seperated by \0
select name=yadda multi
DEFANGED_optionyadda1
DEFANGED_optionyadda2
DEFANGED_optionyadda3
/DEFANGED_select
my $CGI = new CGI();
%form_data = $CGI-Vars;
@options = split(\0,$form_data{'yadda'});
$options[0] = yadda1, $options[1] = yadda2 etc .
Not usable live code obviously, but you should see the idea...
-Chris
- Original Message -
From: Dennis Stout [EMAIL PROTECTED]
To: [EMAIL PROTECTED]; [EMAIL PROTECTED];
[EMAIL PROTECTED]
Sent: Thursday, July 10, 2003 4:52 PM
Subject: Re: select multiple
Interesting.
So in mod_perl, I would use $r-args{__what__} to get to it? Heh.
I'll email the mod_perl list..
Dennis
Re: select multiple
mod_perl and the methods available in the apache request object shuold
beable
to replace CGI.pm entirely, especially when you have a highly customized
RequestHandler :/
Guess I'll see what happens, since I need cookie headers to work AND now
multiple values for one param.
Have you looked at Apache::Request?
Reading documentation.. and it looks like $r-param is what I need :) Thanks!
--- perldoc Apache::Request ---
param
Get or set request parameters (using case-insensitive
keys) by mimicing the OO interface of CGI::param.
Unlike the CGI.pm version, Apache::Request's param
method is very fast- it's now quicker than even
mod_perl's native Apache-args method. However,
CGI.pm's -attr = $val type arguments are not sup-
ported.
# similar to CGI.pm
my $value = $apr-param('foo');
my @values = $apr-param('foo');
my @params = $apr-param;
# the following differ slightly from CGI.pm
# assigns multiple values to 'foo'
$apr-param('foo' = [qw(one two three)]);
# returns ref to underlying apache table object
my $table = $apr-param; # identical to $apr-parms - see below
parms
Get or set the underlying apache parameter table of
the Apache::Request object. When invoked without
arguments, parms returns a reference to an
Apache::Table object that is tied to the
Apache::Request object's parameter table. If called
with an Apache::Table reference as as argument, the
Apache::Request object's parameter table is replaced
by the argument's table.
# $apache_table references an Apache::Table object
$apr-parms($apache_table); # sets $apr's parameter table
# returns ref to Apache::Table object provided by $apache_table
my $table = $apr-parms;
Re: select multiple
Dennis Stout wrote: ARHG. I want to stay as far away from use CGI; as possible =/ *sigh* mod_perl and the methods available in the apache request object shuold beable to replace CGI.pm entirely, especially when you have a highly customized RequestHandler :/ Guess I'll see what happens, since I need cookie headers to work AND now multiple values for one param. Probably best to try and see. Setup a simple handler that calls $r-args in list context and then step through the elements and see how they are arranged. I poked around in the 1.0 docs but wasn't able to come up with anything concrete, you might also mention which version of mod_perl you are dealing with http://danconia.org
libapreq and select multiple?
Is it just me, or does libapreq not handle the response from select
multiple correctly? It appears to only make one of the values
accessible.
From what I can tell, this appears to go all the way down to the
Apache::Table implementation, where the underlying Apache data
structure does not quite have the perl semantics of no duplicate
keys.
My ideal would be for $apr-param("selectmultiplename") to return
an array ref of the values. But I don't really have much of a clue
of where to start to implement this.
Thoughts?
Jim
Re: libapreq and select multiple?
On Apr 27, Jim Winstead wrote:
Is it just me, or does libapreq not handle the response from select
multiple correctly? It appears to only make one of the values
accessible.
From what I can tell, this appears to go all the way down to the
Apache::Table implementation, where the underlying Apache data
structure does not quite have the perl semantics of no duplicate
keys.
My ideal would be for $apr-param("selectmultiplename") to return
an array ref of the values. But I don't really have much of a clue
of where to start to implement this.
Thoughts?
Of course, $apr-param("selectmultiplename") returns an array of
the values in an array context.
Subtle. :)
Jim
