HTML::FormFu::Manual::UseroContributed Perl DoHTML::FormFu::Manual::Unicode(3)NAMEHTML::FormFu::Manual::Unicode - Working with unicode
DESCRIPTION
Working with unicode.
For a practical example, see the Catalyst application in the
"examples/unicode" directory in this distribution.
ASSUMPTIONS
In this tutorial, we're assuming that all encodings are UTF-8. It's
relatively simple to combine different encodings from different
sources, but that's beyond the scope of this tutorial.
For simplicity, we're also going to assume that you're using Catalyst
for your web-framework, DBIx::Class for your database ORM, TT for your
templating system, and YAML format "HTML::FormFu" configuration files,
with YAML::XS installed. However, the principles we'll cover should
translate to whatever technologies you chose to work with.
BASICS
To make it short and sweet: you must decode all data going into your
program, and encode all data coming from your program.
Skip to "CHANGES REQUIRED" if you want to see what you need to do
without any other explanation.
INPUT
Input parameters from the browser
If you're using "Catalyst", Catalyst::Plugin::Unicode will decode all
input parameters sent from the browser to your application - see
"Catalyst Configuration".
If you're using some other framework or, in any case, you need to
decode the input parameters yourself, please take a look at
HTML::FormFu::Filter::Encode.
Data from the database
If you're using DBIx::Class, DBIx::Class::UTF8Columns is likely the
best options, as it will decode all input retrieved from the database -
see "DBIx::Class Configuration".
In other cases (i.e. plain DBI), you still need to decode the string
data coming from the database. This varies depending on the database
server. For MySQL, for instance, you can use the "mysql_enable_utf8"
attribute: see DBD::mysql documentation for details.
Your template files
Set TT to decode all template files - see "TT Configuration".
HTML::FormFu's own template files
Set "HTML::FormFu" to decode all template files - see "HTML::FormFu
Template Configuration".
HTML::FormFu form configuration files
If you're using "YAML" config files, your files will automatically be
decoded by "load_config_file|HTML::FormFu/load_config_file" and
"load_config_filestem|HTML::FormFu/load_config_filestem".
If you have Config::General config files, your files will automatically
be decoded by "load_config_file|HTML::FormFu/load_config_file" and
"load_config_filestem|HTML::FormFu/load_config_filestem", which
automatically sets Config::General's "-UTF8" setting.
Your perl source code
Any perl source files which contain Unicode characters must use the
utf8 module.
OUTPUT
Data saved to the database
With "DBIx::Class", DBIx::Class::UTF8Columns will encode all data sent
to the database - see "DBIx::Class Configuration".
HTML sent to the browser
With "Catalyst", Catalyst::Plugin::Unicode will encode all output sent
from your application to the browser - see "Catalyst Configuration".
In other circumstances you need to be sure to output your Unicode
(decoded) strings in UTF-8. To do this you can encode your output
before it's sent to the browser with something like:
use utf8;
if ( $output && utf8::is_utf8($output) ){
utf8::encode( $output ); # Encodes in-place
}
Another option is to set the "binmode" for "STDOUT":
bindmode STDOUT, ':utf8';
However, be sure to do this only when sending UTF-8 data: if you're
serving images, PFD files, etc, "binmode" should remain set to ":raw".
CHANGES REQUIRED
Catalyst Configuration
Add Catalyst::Plugin::Unicode to the list of Catalyst plugins:
use Catalyst qw( ConfigLoader Static::Simple Unicode );
DBIx::Class Configuration
Add DBIx::Class::UTF8Columns to the list of components loaded, for each
table that has columns storing unicode:
__PACKAGE__->load_components( qw( UTF8Columns HTML::FormFu PK::Auto Core ) );
Pass each column name that will store unicode to "utf8_columns()":
__PACKAGE__->utf8_columns( qw( lastname firstname ) );
TT Configuration
Tell TT to decode all template files, by adding the following to your
application config in MyApp.pm
package MyApp;
use strict;
use parent 'Catalyst';
use Catalyst qw( ConfigLoader );
MyApp->config({
'View::TT' => {
ENCODING => 'UTF-8',
},
});
1;
HTML::FormFu Template Configuration
Make "HTML::FormFu" tell TT to decode all template files, by adding the
following to your "myapp.yml" Catalyst configuration file:
package MyApp;
use strict;
use parent 'Catalyst';
use Catalyst qw( ConfigLoader );
MyApp->config({
'Controller::HTML::FormFu' => {
constructor => {
tt_args => {
ENCODING => 'UTF-8',
},
},
},
});
1;
These above 2 examples should be combined, like so:
package MyApp;
use strict;
use parent 'Catalyst';
use Catalyst qw( ConfigLoader );
MyApp->config({
'Controller::HTML::FormFu' => {
constructor => {
tt_args => {
ENCODING => 'UTF-8',
},
},
},
'View::TT' => {
ENCODING => 'UTF-8',
},
});
1;
AUTHORS
Carl Franks "cfranks@cpan.org" Michele Beltrame "arthas@cpan.org"
(contributions)
COPYRIGHT
This document is free, you can redistribute it and/or modify it under
the same terms as Perl itself.
perl v5.14.2 2011-05-10 HTML::FormFu::Manual::Unicode(3)
