NAME

HTML::FillInForm - Populates HTML Forms with data.

VERSION

version 2.22

SYNOPSIS

Fill HTML form with data.

$output = HTML::FillInForm->fill( \$html,   $q );
$output = HTML::FillInForm->fill( \@html,   [$q1,$q2] );
$output = HTML::FillInForm->fill( \*HTML,   \%data );
$output = HTML::FillInForm->fill( 't.html', [\%data1,%data2] );

The HTML can be provided as a scalarref, arrayref, filehandle or file. The data can come from one or more hashrefs, or objects which support a param() method, like CGI.pm, Apache::Request, etc.

DESCRIPTION

This module fills in an HTML form with data from a Perl data structure, allowing you to keep the HTML and Perl separate.

Here are two common use cases:

1. A user submits an HTML form without filling out a required field. You want to redisplay the form with all the previous data in it, to make it easy for the user to see and correct the error.

2. You have just retrieved a record from a database and need to display it in an HTML form.

fill

The basic syntax is seen above the Synopsis. There are a few additional options.

Options

target => 'form1'

Suppose you have multiple forms in a html file and only want to fill in one.

$output = HTML::FillInForm->fill(\$html, $q, target => 'form1');

This will fill in only the form inside

<FORM name="form1"> ... </FORM>

fill_password => 0

Passwords are filled in by default. To disable:

fill_password => 0

ignore_fields => []

To disable the filling of some fields:

ignore_fields => ['prev','next']

disable_fields => []

To disable fields from being edited:

disable_fields => [ 'uid', 'gid' ]

invalid_fields => []

To mark fields as being invalid (CSS class set to "invalid" or whatever you set invalid_class to):

invalid_fields => [ 'uid', 'gid' ]

invalid_class => "invalid"

The CSS class which will be used to mark fields invalid. Defaults to "invalid".

clear_absent_checkboxes => 0

Absent fields are not cleared or in any way changed. This is not what you want when you deal with checkboxes which are not sent by browser at all when cleared by user.

To remove "checked" attribute from checkboxes and radio buttons and attribute "selected" from options of select lists for which there's no data:

clear_absent_checkboxes => 1

File Upload fields

File upload fields cannot be supported directly. Workarounds include asking the user to re-attach any file uploads or fancy server-side storage and referencing. You are on your own.

Clearing Fields

Fields are cleared if you set their value to an empty string or empty arrayref but not undef:

# this will leave the form element foo untouched
HTML::FillInForm->fill(\$html, { foo => undef });

# this will set clear the form element foo
HTML::FillInForm->fill(\$html, { foo => "" });

It has been suggested to add a option to change the behavior so that undef values will clear the form elements. Patches welcome.

You can also use clear_absent_checkboxes option to clear checkboxes, radio buttons and selects without corresponding keys in the data:

# this will set clear the form element foo (and all others except
# bar)
HTML::FillInForm->fill(\$html, { bar => 123 },
    clear_absent_checkboxes => 1);

Old syntax

You probably need to read no further. The remaining docs concern the 1.x era syntax, which is still supported.

new

Call new() to create a new FillInForm object:

$fif = HTML::FillInForm->new;
$fif->fill(...);

In theory, there is a slight performance benefit to calling new() before fill() if you make multiple calls to fill() before you destroy the object. Benchmark before optimizing.

fill ( old syntax )

Instead of having your HTML and data types auto-detected, you can declare them explicitly in your call to fill():

HTML source options:

arrayref  => @html
scalarref => $html
file      => \*HTML 
file      => 't.html'

Fill Data options:

fobject   => $data_obj  # with param() method
fdat      => \%data

Additional methods are also available:

fill_file(\*HTML,...);
fill_file('t.html',...);
fill_arrayref(\@html,...);
fill_scalarref(\$html,...);

USING AN ALTERNATE PARSER

It's possible to use an alternate parser to HTML::Parser if the alternate provides a sufficiently compatible interface. For example, when a Pure Perl implementation of HTML::Parser appears, it could be used for portability. The syntax is simply to provide a parser_class to new();

HTML::FillInForm->new( parser_class => 'MyAlternate::Parser' ); 

CALLING FROM OTHER MODULES

Apache::PageKit

To use HTML::FillInForm in Apache::PageKit is easy. It is automatically called for any page that includes a <form> tag. It can be turned on or off by using the fill_in_form configuration option.

Apache::ASP v2.09 and above

HTML::FillInForm is now integrated with Apache::ASP. To activate, use

PerlSetVar FormFill 1
$Response->{FormFill} = 1

HTML::Mason

Using HTML::FillInForm from HTML::Mason is covered in the FAQ on the masonhq.com website at http://www.masonhq.com/?FAQ:HTTPAndHTML#h-how_can_i_populate_form_values_automatically_

SECURITY

Note that you might want to think about caching issues if you have password fields on your page. There is a discussion of this issue at

http://www.perlmonks.org/index.pl?node_id=70482

In summary, some browsers will cache the output of CGI scripts, and you can control this by setting the Expires header. For example, use -expires in CGI.pm or set browser_cache to no in Config.xml file of Apache::PageKit.

TRANSLATION

Kato Atsushi has translated these docs into Japanese, available from

http://perldoc.jp

BUGS

Please submit any bug reports to tjmather@maxmind.com.

NOTES

Requires Perl 5.005 and HTML::Parser version 3.26.

I wrote this module because I wanted to be able to insert CGI data into HTML forms, but without combining the HTML and Perl code. CGI.pm and Embperl allow you so insert CGI data into forms, but require that you mix HTML with Perl.

There is a nice review of the module available here: http://www.perlmonks.org/index.pl?node_id=274534

SEE ALSO

HTML::Parser, Data::FormValidator, HTML::Template, Apache::PageKit

CREDITS

Fixes, Bug Reports, Docs have been generously provided by:

Alex Kapranoff                Miika Pekkarinen
Michael Fisher                Sam Tregar
Tatsuhiko Miyagawa            Joseph Yanni
Boris Zentner                 Philip Mak
Dave Rolsky                   Jost Krieger
Patrick Michael Kane          Gabriel Burka
Ade Olonoh                    Bill Moseley
Tom Lancaster                 James Tolley
Martin H Sluka                Dan Kubb
Mark Stosberg                 Alexander Hartmaier
Jonathan Swartz               Paul Miller
Trevor Schellhorn             Anthony Ettinger
Jim Miner                     Simon P. Ditner
Paul Lindner                  Michael Peters
Maurice Aubrey                Trevor Schellhorn
Andrew Creer                

Thanks!

AUTHOR

TJ Mather, tjmather@maxmind.com

COPYRIGHT AND LICENSE

This software is copyright (c) 2000 by TJ Mather, tjmather@maxmind.com.

This is free software; you can redistribute it and/or modify it under the same terms as the Perl 5 programming language system itself.

cpanm HTML::FillInForm

perl -MCPAN -e shell
install HTML::FillInForm