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# -*- Mode: perl; indent-tabs-mode: nil -*-
# The contents of this file are subject to the Mozilla Public
# License Version 1.1 (the "License"); you may not use this file
# except in compliance with the License. You may obtain a copy of
# the License at
# Software distributed under the License is distributed on an "AS
# IS" basis, WITHOUT WARRANTY OF ANY KIND, either express or
# implied. See the License for the specific language governing
# rights and limitations under the License.
# The Original Code is the Bugzilla Bug Tracking System.
# The Initial Developer of the Original Code is Netscape Communications
# Corporation. Portions created by Netscape are
# Copyright (C) 1998 Netscape Communications Corporation. All
# Rights Reserved.
# Contributor(s): Bradley Baetz <>
# Erik Stambaugh <>
package Bugzilla;
use strict;
use Bugzilla::Auth;
use Bugzilla::Auth::Login::WWW;
use Bugzilla::CGI;
use Bugzilla::Config;
use Bugzilla::Constants;
use Bugzilla::DB;
use Bugzilla::Template;
use Bugzilla::User;
my $_template;
sub template {
my $class = shift;
$_template ||= Bugzilla::Template->create();
return $_template;
my $_cgi;
sub cgi {
my $class = shift;
$_cgi ||= new Bugzilla::CGI();
return $_cgi;
my $_user;
sub user {
my $class = shift;
if (not defined $_user) {
$_user = new Bugzilla::User;
return $_user;
sub login {
my ($class, $type) = @_;
$_user = Bugzilla::Auth::Login::WWW->login($type);
sub logout {
my ($class, $option) = @_;
# If we're not logged in, go away
return unless user->id;
$option = LOGOUT_CURRENT unless defined $option;
Bugzilla::Auth::Login::WWW->logout($_user, $option);
sub logout_user {
my ($class, $user) = @_;
# When we're logging out another user we leave cookies alone, and
# therefore avoid calling Bugzilla->logout() directly.
Bugzilla::Auth::Login::WWW->logout($user, LOGOUT_ALL);
# 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);
# hack that invalidates credentials for a single request
sub logout_request {
undef $_user;
# XXX clean this up eventually
$::userid = 0;
# We can't delete from $cgi->cookie, so logincookie data will remain
# there. Don't rely on it: use Bugzilla->user->login instead!
my $_dbh;
my $_dbh_main;
my $_dbh_shadow;
sub dbh {
my $class = shift;
# If we're not connected, then we must want the main db
if (!$_dbh) {
$_dbh = $_dbh_main = Bugzilla::DB::connect_main();
return $_dbh;
my $_batch;
sub batch {
my $class = shift;
my $newval = shift;
if ($newval) {
$_batch = $newval;
return $_batch || 0;
sub dbwritesallowed {
my $class = shift;
# We can write if we are connected to the main database.
# Note that if we don't have a shadowdb, then we claim that its ok
# to write even if we're nominally connected to the shadowdb.
# This is OK because this method is only used to test if misc
# updates can be done, rather than anything complicated.
return $class->dbh == $_dbh_main;
sub switch_to_shadow_db {
my $class = shift;
if (!$_dbh_shadow) {
if (Param('shadowdb')) {
$_dbh_shadow = Bugzilla::DB::connect_shadow();
} else {
$_dbh_shadow = $_dbh_main;
$_dbh = $_dbh_shadow;
# we have to return $class->dbh instead of $_dbh as
# $_dbh_shadow may be undefined if no shadow DB is used
# and no connection to the main DB has been established yet.
return $class->dbh;
sub switch_to_main_db {
my $class = shift;
$_dbh = $_dbh_main;
# We have to return $class->dbh instead of $_dbh as
# $_dbh_main may be undefined if no connection to the main DB
# has been established yet.
return $class->dbh;
# Private methods
# Per process cleanup
sub _cleanup {
undef $_cgi;
undef $_user;
# See bug 192531. If we don't clear the possibly active statement handles,
# then when this is called from the END block, it happens _before_ the
# destructors in Bugzilla::DB have happened.
# See
# Without disconnecting explicitly here, noone notices, because DBI::END
# ends up calling DBD::mysql's $drh->disconnect_all, which is a noop.
# This code is evil, but it needs to be done, at least until SendSQL and
# friends can be removed
@Bugzilla::DB::SQLStateStack = ();
undef $Bugzilla::DB::_current_sth;
# When we support transactions, need to ->rollback here
$_dbh_main->disconnect if $_dbh_main;
$_dbh_shadow->disconnect if $_dbh_shadow and Param("shadowdb");
undef $_dbh_main;
undef $_dbh_shadow;
undef $_dbh;
sub END {
=head1 NAME
Bugzilla - Semi-persistent collection of various objects used by scripts
and modules
use Bugzilla;
sub someModulesSub {
Several Bugzilla 'things' are used by a variety of modules and scripts. This
includes database handles, template objects, and so on.
This module is a singleton intended as a central place to store these objects.
This approach has several advantages:
=over 4
=item *
They're not global variables, so we don't have issues with them staying arround
with mod_perl
=item *
Everything is in one central place, so its easy to access, modify, and maintain
=item *
Code in modules can get access to these objects without having to have them
all passed from the caller, and the caller's caller, and....
=item *
We can reuse objects across requests using mod_perl where appropriate (eg
templates), whilst destroying those which are only valid for a single request
(such as the current user)
Note that items accessible via this object are demand-loaded when requested.
For something to be added to this object, it should either be able to benefit
from persistence when run under mod_perl (such as the a C<template> object),
or should be something which is globally required by a large ammount of code
(such as the current C<user> object).
=head1 METHODS
Note that all C<Bugzilla> functionality is method based; use C<Bugzilla-E<gt>dbh>
rather than C<Bugzilla::dbh>. Nothing cares about this now, but don't rely on
=over 4
=item C<template>
The current C<Template> object, to be used for output
=item C<cgi>
The current C<cgi> object. Note that modules should B<not> be using this in
general. Not all Bugzilla actions are cgi requests. Its useful as a convenience
method for those scripts/templates which are only use via CGI, though.
=item C<user>
The current C<Bugzilla::User>. C<undef> if there is no currently logged in user
or if the login code has not yet been run.
=item C<login>
Logs in a user, returning a C<Bugzilla::User> object, or C<undef> if there is
no logged in user. See L<Bugzilla::Auth|Bugzilla::Auth>, and
=item C<logout($option)>
Logs out the current user, which involves invalidating user sessions and
cookies. Three options are available from
L<Bugzilla::Constants|Bugzilla::Constants>: LOGOUT_CURRENT (the
=item C<logout_user($user)>
Logs out the specified user (invalidating all his sessions), taking a
Bugzilla::User instance.
=item C<logout_by_id($id)>
Logs out the user with the id specified. This is a compatibility
function to be used in callsites where there is only a userid and no
Bugzilla::User instance.
=item C<logout_request>
Essentially, causes calls to C<Bugzilla-E<gt>user> to return C<undef>. This has the
effect of logging out a user for the current request only; cookies and
database sessions are left intact.
=item C<batch>
Set to true, by calling Bugzilla->batch(1), to indicate that Bugzilla is
being called in a non-interactive manner and errors should be passed to
die() rather than being sent to a browser and finished with an exit().
Bugzilla->batch will return the current state of this flag.
=item C<dbh>
The current database handle. See L<DBI>.
=item C<dbwritesallowed>
Determines if writes to the database are permitted. This is usually used to
determine if some general cleanup needs to occur (such as clearing the token
=item C<switch_to_shadow_db>
Switch from using the main database to using the shadow database.
=item C<switch_to_main_db>
Change the database object to refer to the main database.