drakx - Mageia Installer and base platform for many utilities

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Mageia Installer and base platform for many utilities

Thierry Vignaud [tv]

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# This Source Code Form is subject to the terms of the Mozilla Public
# License, v. 2.0. If a copy of the MPL was not distributed with this
# file, You can obtain one at http://mozilla.org/MPL/2.0/.
#
# This Source Code Form is "Incompatible With Secondary Licenses", as
# defined by the Mozilla Public License, v. 2.0.

package Bugzilla;

use 5.10.1;
use strict;

# We want any compile errors to get to the browser, if possible.
BEGIN {
    # This makes sure we're in a CGI.
    if ($ENV{SERVER_SOFTWARE} && !$ENV{MOD_PERL}) {
        require CGI::Carp;
        CGI::Carp->import('fatalsToBrowser');
    }
}

use Bugzilla::Config;
use Bugzilla::Constants;
use Bugzilla::Auth;
use Bugzilla::Auth::Persist::Cookie;
use Bugzilla::CGI;
use Bugzilla::Extension;
use Bugzilla::DB;
use Bugzilla::Install::Localconfig qw(read_localconfig);
use Bugzilla::Install::Requirements qw(OPTIONAL_MODULES);
use Bugzilla::Install::Util qw(init_console include_languages);
use Bugzilla::Template;
use Bugzilla::User;
use Bugzilla::Error;
use Bugzilla::Util;
use Bugzilla::Field;
use Bugzilla::Flag;
use Bugzilla::Token;

use File::Basename;
use File::Spec::Functions;
use DateTime::TimeZone;
use Date::Parse;
use Safe;

#####################################################################
# Constants
#####################################################################

# Scripts that are not stopped by shutdownhtml being in effect.
use constant SHUTDOWNHTML_EXEMPT => qw(
    editparams.cgi
    checksetup.pl
    migrate.pl
    recode.pl
);

# Non-cgi scripts that should silently exit.
use constant SHUTDOWNHTML_EXIT_SILENTLY => qw(
    whine.pl
);

# shutdownhtml pages are sent as an HTTP 503. After how many seconds
# should search engines attempt to index the page again?
use constant SHUTDOWNHTML_RETRY_AFTER => 3600;

#####################################################################
# Global Code
#####################################################################

# $::SIG{__DIE__} = i_am_cgi() ? \&CGI::Carp::confess : \&Carp::confess;

# Note that this is a raw subroutine, not a method, so $class isn't available.
sub init_page {
    if (Bugzilla->usage_mode == USAGE_MODE_CMDLINE) {
        init_console();
    }
    elsif (Bugzilla->params->{'utf8'}) {
        binmode STDOUT, ':utf8';
    }

    if (${^TAINT}) {
        # Some environment variables are not taint safe
        delete @::ENV{'PATH', 'IFS', 'CDPATH', 'ENV', 'BASH_ENV'};
        # Some modules throw undefined errors (notably File::Spec::Win32) if
        # PATH is undefined.
        $ENV{'PATH'} = '';
    }

    # Because this function is run live from perl "use" commands of
    # other scripts, we're skipping the rest of this function if we get here
    # during a perl syntax check (perl -c, like we do during the
    # 001compile.t test).
    return if $^C;

    # IIS prints out warnings to the webpage, so ignore them, or log them
    # to a file if the file exists.
    if ($ENV{SERVER_SOFTWARE} && $ENV{SERVER_SOFTWARE} =~ /microsoft-iis/i) {
        $SIG{__WARN__} = sub {
            my ($msg) = @_;
            my $datadir = bz_locations()->{'datadir'};
            if (-w "$datadir/errorlog") {
                my $warning_log = new IO::File(">>$datadir/errorlog");
                print $warning_log $msg;
                $warning_log->close();
            }
        };
    }

    my $script = basename($0);

    # Because of attachment_base, attachment.cgi handles this itself.
    if ($script ne 'attachment.cgi') {
        do_ssl_redirect_if_required();
    }

    # If Bugzilla is shut down, do not allow anything to run, just display a
    # message to the user about the downtime and log out.  Scripts listed in 
    # SHUTDOWNHTML_EXEMPT are exempt from this message.
    #
    # This code must go here. It cannot go anywhere in Bugzilla::CGI, because
    # it uses Template, and that causes various dependency loops.
    if (Bugzilla->params->{"shutdownhtml"}
        && !grep { $_ eq $script } SHUTDOWNHTML_EXEMPT)
    {
        # Allow non-cgi scripts to exit silently (without displaying any
        # message), if desired. At this point, no DBI call has been made
        # yet, and no error will be returned if the DB is inaccessible.
        if (!i_am_cgi()
            && grep { $_ eq $script } SHUTDOWNHTML_EXIT_SILENTLY)
        {
            exit;
        }

        # For security reasons, log out users when Bugzilla is down.
        # Bugzilla->login() is required to catch the logincookie, if any.
        my $user;
        eval { $user = Bugzilla->login(LOGIN_OPTIONAL); };
        if ($@) {
            # The DB is not accessible. Use the default user object.
            $user = Bugzilla->user;
            $user->{settings} = {};
        }
        my $userid = $user->id;
        Bugzilla->logout();

        my $template = Bugzilla->template;
        my $vars = {};
        $vars->{'message'} = 'shutdown';
        $vars->{'userid'} = $userid;
        # Generate and return a message about the downtime, appropriately
        # for if we're a command-line script or a CGI script.
        my $extension;
        if (i_am_cgi() && (!Bugzilla->cgi->param('ctype')
                           || Bugzilla->cgi->param('ctype') eq 'html')) {
            $extension = 'html';
        }
        else {
            $extension = 'txt';
        }
        if (i_am_cgi()) {
            # Set the HTTP status to 503 when Bugzilla is down to avoid pages
            # being indexed by search engines.
            print Bugzilla->cgi->header(-status => 503, 
                -retry_after => SHUTDOWNHTML_RETRY_AFTER);
        }
        my $t_output;
        $template->process("global/message.$extension.tmpl", $vars, \$t_output)
            || ThrowTemplateError($template->error);
        say $t_output;
        exit;
    }
}

#####################################################################
# Subroutines and Methods
#####################################################################

sub template {
    return $_[0]->request_cache->{template} ||= Bugzilla::Template->create();
}

sub template_inner {
    my ($class, $lang) = @_;
    my $cache = $class->request_cache;
    my $current_lang = $cache->{template_current_lang}->[0];
    $lang ||= $current_lang || '';
    return $cache->{"template_inner_$lang"} ||= Bugzilla::Template->create(language => $lang);
}

our $extension_packages;
sub extensions {
    my ($class) = @_;
    my $cache = $class->request_cache;
    if (!$cache->{extensions}) {
        # Under mod_perl, mod_perl.pl populates $extension_packages for us.
        if (!$extension_packages) {
            $extension_packages = Bugzilla::Extension->load_all();
        }
        my @extensions;
        foreach my $package (@$extension_packages) {
            my $extension = $package->new();
            if ($extension->enabled) {
                push(@extensions, $extension);
            }        
        }
        $cache->{extensions} = \@extensions;
    }
    return $cache->{extensions};
}

sub feature {
    my ($class, $feature) = @_;
    my $cache = $class->request_cache;
    return $cache->{feature}->{$feature}
        if exists $cache->{feature}->{$feature};

    my $feature_map = $cache->{feature_map};
    if (!$feature_map) {
        foreach my $package (@{ OPTIONAL_MODULES() }) {
            foreach my $f (@{ $package->{feature} }) {
                $feature_map->{$f} ||= [];
                push(@{ $feature_map->{$f} }, $package->{module});
            }
        }
        $cache->{feature_map} = $feature_map;
    }

    if (!$feature_map->{$feature}) {
        ThrowCodeError('invalid_feature', { feature => $feature });
    }

    my $success = 1;
    foreach my $module (@{ $feature_map->{$feature} }) {
        # We can't use a string eval and "use" here (it kills Template-Toolkit,
        # see https://rt.cpan.org/Public/Bug/Display.html?id=47929), so we have
        # to do a block eval.
        $module =~ s{::}{/}g;
        $module .= ".pm";
        eval { require $module; 1; } or $success = 0;
    }
    $cache->{feature}->{$feature} = $success;
    return $success;
}

sub cgi {
    return $_[0]->request_cache->{cgi} ||= new Bugzilla::CGI();
}

sub input_params {
    my ($class, $params) = @_;
    my $cache = $class->request_cache;
    # This is how the WebService and other places set input_params.
    if (defined $params) {
        $cache->{input_params} = $params;
    }
    return $cache->{input_params} if defined $cache->{input_params};

    # Making this scalar makes it a tied hash to the internals of $cgi,
    # so if a variable is changed, then it actually changes the $cgi object
    # as well.
    $cache->{input_params} = $class->cgi->Vars;
    return $cache->{input_params};
}

sub localconfig {
    return $_[0]->process_cache->{localconfig} ||= read_localconfig();
}

sub params {
    return $_[0]->request_cache->{params} ||= Bugzilla::Config::read_param_file();
}

sub user {
    return $_[0]->request_cache->{user} ||= new Bugzilla::User;
}

sub set_user {
    my ($class, $user) = @_;
    $class->request_cache->{user} = $user;
}

sub sudoer {
    return $_[0]->request_cache->{sudoer};
}

sub sudo_request {
    my ($class, $new_user, $new_sudoer) = @_;
    $class->request_cache->{user}   = $new_user;
    $class->request_cache->{sudoer} = $new_sudoer;
    # NOTE: If you want to log the start of an sudo session, do it here.
}

sub page_requires_login {
    return $_[0]->request_cache->{page_requires_login};
}

sub login {
    my ($class, $type) = @_;

    return $class->user if $class->user->id;

    my $authorizer = new Bugzilla::Auth();
    $type = LOGIN_REQUIRED if $class->cgi->param('GoAheadAndLogIn');

    if (!defined $type || $type == LOGIN_NORMAL) {
        $type = $class->params->{'requirelogin'} ? LOGIN_REQUIRED : LOGIN_NORMAL;
    }

    # Allow templates to know that we're in a page that always requires
    # login.
    if ($type == LOGIN_REQUIRED) {
        $class->request_cache->{page_requires_login} = 1;
    }

    my $authenticated_user = $authorizer->login($type);
    
    # At this point, we now know if a real person is logged in.
    # We must now check to see if an sudo session is in progress.
    # For a session to be in progress, the following must be true:
    # 1: There must be a logged in user
    # 2: That user must be in the 'bz_sudoer' group
    # 3: There must be a valid value in the 'sudo' cookie
    # 4: A Bugzilla::User object must exist for the given cookie value
    # 5: That user must NOT be in the 'bz_sudo_protect' group
    my $token = $class->cgi->cookie('sudo');
    if (defined $authenticated_user && $token) {
        my ($user_id, $date, $sudo_target_id) = Bugzilla::Token::GetTokenData($token);
        if (!$user_id
            || $user_id != $authenticated_user->id
            || !detaint_natural($sudo_target_id)
            || (time() - str2time($date) > MAX_SUDO_TOKEN_AGE))
        {
            $class->cgi->remove_cookie('sudo');
            ThrowUserError('sudo_invalid_cookie');
        }

        my $sudo_target = new Bugzilla::User($sudo_target_id);
        if ($authenticated_user->in_group('bz_sudoers')
            && defined $sudo_target
            && !$sudo_target->in_group('bz_sudo_protect'))
        {
            $class->set_user($sudo_target);
            $class->request_cache->{sudoer} = $authenticated_user;
            # And make sure that both users have the same Auth object,
            # since we never call Auth::login for the sudo target.
            $sudo_target->set_authorizer($authenticated_user->authorizer);

            # NOTE: If you want to do any special logging, do it here.
        }
        else {
            delete_token($token);
            $class->cgi->remove_cookie('sudo');
            ThrowUserError('sudo_illegal_action', { sudoer => $authenticated_user,
                                                    target_user => $sudo_target });
        }
    }
    else {
        $class->set_user($authenticated_user);
    }

    if ($class->sudoer) {
        $class->sudoer->update_last_seen_date();
    } else {
        $class->user->update_last_seen_date();
    }

    return $class->user;
}

sub logout {
    my ($class, $option) = @_;

    # If we're not logged in, go away
    return unless $class->user->id;

    $option = LOGOUT_CURRENT unless defined $option;
    Bugzilla::Auth::Persist::Cookie->logout({type => $option});
    $class->logout_request() unless $option eq LOGOUT_KEEP_CURRENT;
}

sub logout_user {
    my ($class, $user) = @_;
    # When we're logging out another user we leave cookies alone, and
    # therefore avoid calling Bugzilla->logout() directly.
    Bugzilla::Auth::Persist::Cookie->logout({user => $user});
}

# just a compatibility front-end to logout_user that gets a user by id
sub logout_user_by_id {
    my ($class, $id) = @_;
    my $user = new Bugzilla::User($id);
    $class->logout_user($user);
}

# hack that invalidates credentials for a single request
sub logout_request {
    my $class = shift;
    delete $class->request_cache->{user};
    delete $class->request_cache->{sudoer};
    # We can't delete from $cgi->cookie, so logincookie data will remain
    # there. Don't rely on it: use Bugzilla->user->login instead!
}

sub job_queue {
    require Bugzilla::JobQueue;
    return $_[0]->request_cache->{job_queue} ||= Bugzilla::JobQueue->new();
}

sub dbh {
    # If we're not connected, then we must want the main db
    return $_[0]->request_cache->{dbh} ||= $_[0]->dbh_main;
}

sub dbh_main {
    return $_[0]->request_cache->{dbh_main} ||= Bugzilla::DB::connect_main();
}


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