comment on

This is the XML-RPC client.

#!/usr/bin/perl
use strict;
use warnings;
use Frontier::Client;

my $number;

{
  print "Enter a number\n";
  $number = <STDIN>;
  chomp($number);
  redo unless $number =~ /^\d+$/;
}

my $server_url = 'http://localhost/square/index.cgi/RPC2';
my $server = Frontier::Client->new(url => $server_url);

my $result = $server->call('sample.square', $number);
my $square = $result->{'square'};
my $difference = $result->{'difference'};

print "The square of $number is $square.\n";
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This is the CGI::Application subclass which implements the functionality of the server.

package Square;
use base 'CGI::Application';

sub setup
{
  my ($self) = @_;

  $ENV{'PATH'} = '';

  my @pi = split(m{/}, $self->query->path_info());
  $self->start_mode(($pi[1] eq 'RPC2') ? 'RPC2' : 'view');
  $self->run_modes(
    'view'   => 'view',
    'RPC2'   => 'rpc2',
  );
}

sub view
{
  my ($self) = @_;

  my $number = $self->query->param('number');
  my $template = $self->load_tmpl('view');
  $template->param(NUMBER => $number,
                   SQUARE => square($number)->{square},
  );
  return $template->output;
}

sub rpc2
{
  my ($self) = @_;

  require Frontier::RPC2;

  my $rpc = Frontier::RPC2->new();
  my $response = $rpc->serve($self->query->param('POSTDATA'),
    {
      'sample.square' => \&square,
    },
  );

  $self->header_props( -type => 'text/xml', charset => 'UTF-8', );
  return $response;
}

sub square
{
  my ($x) = @_;

  return {square => ($x ** 2)};
}

1;
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Here is the driver script that uses the above module:

#!/usr/bin/perl -T
use warnings;
use strict;
use lib '.';
use Square;

my $square = Square->new();
$square->run();
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Here is the HTML::Template used in the view run mode.

<html>
  <head>
    <title>Square Two Numbers</title>
  </head>
  <body>
    <h1>Square Two Numbers</h1>
    <form action="http://localhost/square/index.cgi/view" method="POST
+">
    Enter a number: <input type="text" name="number">
    <input type="submit">
    </form>
    <!-- TMPL_IF NAME="number" -->
       <p>The square of <!-- TMPL_VAR NAME="number" --> is <!-- TMPL_V
+AR NAME="square" -->.</p>
    <!-- /TMPL_IF -->
  </body>
</html>
[download]

In reply to XML-RPC in a CGI::Application by jaldhar

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