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# Copyright (C) 2008 Arne Georg Gleditsch <lxr@linux.no>.
#
# This program is free software; you can redistribute it and/or modify
# it under the terms of the GNU General Public License as published by
# the Free Software Foundation; either version 2 of the License, or
# (at your option) any later version.
#
# This program is distributed in the hope that it will be useful,
# but WITHOUT ANY WARRANTY; without even the implied warranty of
# MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
# GNU General Public License for more details.
#
# You should have received a copy of the GNU General Public License along
# with this program; if not, write to the Free Software Foundation, Inc.,
# 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA.
#
# The full GNU General Public License is included in this distribution
# in the file called COPYING.
package LXRng::Context;
use strict;
use LXRng;
use vars qw($cached_config $cached_config_stat $cached_config_age);
sub new {
my ($self, %args) = @_;
$self = bless({}, $self);
my $config = $self->read_config();
if ($args{'query'}) {
# Argle. Both CGI and CGI::Simple seem to botch this up, in
# different ways. CGI breaks if SCRIPT_NAME contains regex
# metachars, and CGI::Simple does funny things if SCRIPT_NAME
# is the empty string. Do it by hand...
my $host = 'http'.($ENV{'HTTPS'} eq 'ON' ? 's' : '').'://'.
($ENV{'HTTP_HOST'} || $ENV{'SERVER_NAME'}).
($ENV{'SERVER_PORT'} == ($ENV{'HTTPS'} eq 'ON' ? 443 : 80)
? '' : ':'.$ENV{'SERVER_PORT'});
my $path = $ENV{'REQUEST_URI'};
$path =~ s/\?.*//;
$path =~ s,/+,/,g;
$$self{'req_base'} = $host.$ENV{'SCRIPT_NAME'};
foreach my $p ($args{'query'}->param) {
$$self{'params'}{$p} = [$args{'query'}->param($p)];
}
my @prefs = $args{'query'}->cookie('lxr_prefs');
if (@prefs) {
$$self{'prefs'} = {
map { /^(.*?)(?:=(.*)|)$/; ($1 => $2) } @prefs };
}
foreach my $tree (keys %$config) {
my $base = $$config{$tree}{'base_url'};
$base =~ s,^https?://[^/]+,,;
$base =~ s,/*$,/,;
if ($path =~ m,^\Q$base\E(\Q$tree\E|)([+][^/]+|)(?:$|/)(.*),) {
@$self{'tree', 'path'} = ($1.$2, $3);
last;
}
}
unless ($$self{'tree'}) {
if ($ENV{'PATH_INFO'} =~ m,^/?([^/]+)/?(.*),) {
@$self{'tree', 'path'} = ($1, $2);
}
}
$$self{'tree'} = $args{'query'}->param('tree')
if $args{'query'}->param('tree');
}
if ($args{'tree'}) {
$$self{'tree'} = $args{'tree'};
}
if ($$self{'tree'} =~ s/[+]([^+]*)$//) {
$$self{'release'} = $1 if $1 ne '*';
}
if ($$self{'tree'} and $$self{'tree'} !~ /^[+]/) {
my $tree = $$self{'tree'};
die("No config for tree $tree")
unless exists($$config{$tree});
$$self{'config'} = $$config{$tree};
$$self{'config'}{'usage'} ||= $$self{'config'}{'index'};
}
if (exists $$self{'params'}{'v'} and $$self{'params'}{'v'}) {
$$self{'release'} ||= $$self{'params'}{'v'}[0];
delete($$self{'params'}{'v'});
}
if ($$self{'config'}) {
$$self{'release'} ||= $$self{'config'}{'ver_default'};
$$self{'release'} ||= $$self{'config'}{'ver_list'}[0];
}
return $self;
}
sub read_config {
my ($self) = @_;
my $confpath = $LXRng::ROOT.'/lxrng.conf';
if ($cached_config) {
my @stat = stat($confpath);
if (@stat and
$stat[9] == $cached_config_stat and
time - $cached_config_age < 3600)
{
return $cached_config;
}
$cached_config_stat = $stat[9];
$cached_config_age = time;
}
if (open(my $cfgfile, $confpath)) {
my @config = eval("use strict; use warnings;\n".
"#line 1 \"configuration file\"\n".
join("", <$cfgfile>));
die($@) if $@;
die("Bad configuration file format\n")
unless @config == 1 and ref($config[0]) eq 'HASH';
$cached_config = $config[0];
return $config[0];
}
else {
die("Couldn't open configuration file \"$confpath\".");
}
}
sub release {
my ($self, $value) = @_;
$$self{'release'} = $value if @_ == 2;
return $$self{'release'};
}
sub default_release {
my ($self, $value) = @_;
return $$self{'config'}{'ver_default'};
}
sub all_releases {
my ($self) = @_;
return $$self{'config'}{'ver_list'};
}
sub param {
my ($self, $key) = @_;
my @res;
@res = @{$$self{'params'}{$key}} if
exists $$self{'params'}{$key};
return wantarray ? @res : $res[0];
}
sub path {
my ($self, $value) = @_;
$$self{'path'} = $value if @_ == 2;
return $$self{'path'};
}
sub tree {
my ($self) = @_;
return $$self{'tree'};
}
sub vtree {
my ($self) = @_;
if ($self->release ne $self->default_release) {
return $self->tree.'+'.$self->release;
}
else {
return $self->tree;
}
}
sub path_elements {
my ($self) = @_;
return [] if $self->path =~ /^[ +]/;
my @path;
return [map {
push(@path, $_); { 'node' => $_, 'path' => join('', @path) }
} $self->path =~ m,([^/]+\/?),g];
}
sub config {
my ($self) = @_;
return $$self{'config'} || {};
}
sub prefs {
my ($self) = @_;
return $$self{'prefs'};
}
sub base_url {
my ($self, $notree) = @_;
my $base = $self->config->{'base_url'};
unless ($base) {
$base = $$self{'req_base'};
}
$base =~ s,/*$,/,;
return $base if $notree;
$base .= $self->vtree.'/';
$base =~ s,/+$,/,;
return $base;
}
sub args_url {
my ($self, %args) = @_;
# Todo: escape
my $args = join(';', map { $_.'='.$args{$_} } keys %args);
$args = '?'.$args if $args;
return $args;
}
1;
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