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lib/Apache/Voodoo/Debug/Handler.pm  view on Meta::CPAN

################################################################################
#
# Apache::Voodoo::Debug::Handler
#
# Handles servicing debugging information requests
#
################################################################################
package Apache::Voodoo::Debug::Handler;

$VERSION = "3.0200";

use strict;
use warnings;

use DBI;
use Time::HiRes;
use JSON::DWIW;

use Apache::Voodoo::MP;
use Apache::Voodoo::Constants;

sub new {
	my $class = shift;
	my $self = {};
	bless $self, $class;

	$self->{mp}        = Apache::Voodoo::MP->new();
	$self->{constants} = Apache::Voodoo::Constants->new();

	$self->{debug_root} = $self->{constants}->debug_path();

	warn "Voodoo Debugging Handler Starting...\n";

	$self->{template_dir} = $INC{"Apache/Voodoo/Debug/Handler.pm"};
	$self->{template_dir} =~ s/Handler.pm$/html/;

	$self->{handlers} = {
		map { $_ => 'handle_'.$_ }
		('profile','debug','return_data','session','template_conf','parameters','request')
	};

	$self->{static_files} = {
		"debug.css"     => "text/css",
		"debug.js"      => "application/x-javascript",
		"debug.png"     => "image/png",
		"error.png"     => "image/png",
		"exception.png" => "image/png",
		"info.png"      => "image/png",
		"minus.png"     => "image/png",
		"plus.png"      => "image/png",
		"spinner.gif"   => "image/gif",
		"table.png"     => "image/png",
		"trace.png"     => "image/png",
		"warn.png"      => "image/png"
	};

	$self->{json} = JSON::DWIW->new({bad_char_policy => 'convert', pretty => 1});;

	return $self;
}

sub handler {
	my $self = shift;
	my $r    = shift;

	$self->{mp}->set_request($r);

	# holds all vars associated with this page processing request
	my $uri = $self->{mp}->uri();
	$uri =~ s/^$self->{debug_root}//;
	$uri =~ s/^\///;

	if (defined($self->{static_files}->{$uri})) {
		# request for one of the static files.

		my $file = File::Spec->catfile($self->{template_dir},$uri);
		my $mtime = (stat($file))[9];

		# Handle "if not modified since" requests.
		$r->update_mtime($mtime);
		$r->set_last_modified;
		$r->meets_conditions;
		my $rc = $self->{mp}->if_modified_since($mtime);
		return $rc unless $rc == $self->{mp}->ok;

		# set the content type
		$self->{mp}->content_type($self->{static_files}->{$uri});

		# tell apache to send the underlying file
		$r->sendfile($file);

		return $self->{mp}->ok;
	}
	elsif (defined($self->{handlers}->{$uri})) {
		# request for an operation

		my $method = $self->{handlers}->{$uri};

		# parse the params
		my $params = $self->{mp}->parse_params(1);
		unless (ref($params)) {
			# something went boom
			return $self->display_host_error($params);
		}

		# connect to the debugging database
		my $dbh = DBI->connect_cached(@{$self->{constants}->debug_dbd()});
		unless ($dbh) {
			return $self->display_host_error("Can't connect to debugging database: ".DBI->errstr);
		}

		my $return;
		eval {
			$return = $self->$method($dbh,$params);