aboutsummaryrefslogtreecommitdiffstats
path: root/Bugzilla/Error.pm
blob: 95088850e7fab383091b19ed415f26a566c276ee (plain)
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
73
74
75
76
77
78
79
80
81
82
83
84
85
86
87
88
89
90
91
92
93
94
95
96
97
98
99
100
101
102
103
104
105
106
107
108
109
110
111
112
113
114
115
116
117
118
119
120
121
122
123
124
125
126
127
128
129
130
131
132
133
134
135
136
137
138
139
140
141
142
143
144
145
146
147
148
149
150
151
152
153
154
155
156
157
158
159
160
161
162
163
164
165
166
167
168
169
170
171
172
173
174
175
176
177
178
179
180
181
182
183
184
185
186
187
188
189
190
191
192
193
194
195
196
197
198
199
200
201
202
203
204
205
206
207
208
209
210
211
212
213
214
215
216
# -*- 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 http://www.mozilla.org/MPL/
#
# 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 <bbaetz@acm.org>
#                 Marc Schumann <wurblzap@gmail.com>

package Bugzilla::Error;

use strict;
use base qw(Exporter);

@Bugzilla::Error::EXPORT = qw(ThrowCodeError ThrowTemplateError ThrowUserError);

use Bugzilla::Constants;
use Bugzilla::WebService::Constants;
use Bugzilla::Util;
use Date::Format;

sub _throw_error {
    my ($name, $error, $vars) = @_;

    $vars ||= {};

    $vars->{error} = $error;

    # Make sure any locked tables are unlocked
    # and the transaction is rolled back (if supported)
    Bugzilla->dbh->bz_unlock_tables(UNLOCK_ABORT);

    my $datadir = bz_locations()->{'datadir'};
    # If a writable $datadir/errorlog exists, log error details there.
    if (-w "$datadir/errorlog") {
        require Data::Dumper;
        my $mesg = "";
        for (1..75) { $mesg .= "-"; };
        $mesg .= "\n[$$] " . time2str("%D %H:%M:%S ", time());
        $mesg .= "$name $error ";
        $mesg .= "$ENV{REMOTE_ADDR} " if $ENV{REMOTE_ADDR};
        $mesg .= Bugzilla->user->login;
        $mesg .= (' actually ' . Bugzilla->sudoer->login) if Bugzilla->sudoer;
        $mesg .= "\n";
        my %params = Bugzilla->cgi->Vars;
        $Data::Dumper::Useqq = 1;
        for my $param (sort keys %params) {
            my $val = $params{$param};
            # obscure passwords
            $val = "*****" if $param =~ /password/i;
            # limit line length
            $val =~ s/^(.{512}).*$/$1\[CHOP\]/;
            $mesg .= "[$$] " . Data::Dumper->Dump([$val],["param($param)"]);
        }
        for my $var (sort keys %ENV) {
            my $val = $ENV{$var};
            $val = "*****" if $val =~ /password|http_pass/i;
            $mesg .= "[$$] " . Data::Dumper->Dump([$val],["env($var)"]);
        }
        open(ERRORLOGFID, ">>$datadir/errorlog");
        print ERRORLOGFID "$mesg\n";
        close ERRORLOGFID;
    }

    my $template = Bugzilla->template;
    if (Bugzilla->error_mode == ERROR_MODE_WEBPAGE) {
        print Bugzilla->cgi->header();
        $template->process($name, $vars)
          || ThrowTemplateError($template->error());
    }
    else {
        my $message;
        $template->process($name, $vars, \$message)
          || ThrowTemplateError($template->error());
        if (Bugzilla->error_mode == ERROR_MODE_DIE) {
            die("$message\n");
        }
        elsif (Bugzilla->error_mode == ERROR_MODE_DIE_SOAP_FAULT) {
            my $code = WS_ERROR_CODE->{$error};
            if (!$code) {
                $code = ERROR_UNKNOWN_FATAL if $name =~ /code/i;
                $code = ERROR_UNKNOWN_TRANSIENT if $name =~ /user/i;
            }
            die SOAP::Fault->faultcode($code)->faultstring($message);
        }
    }
    exit;
}

sub ThrowUserError {
    _throw_error("global/user-error.html.tmpl", @_);
}

sub ThrowCodeError {
    _throw_error("global/code-error.html.tmpl", @_);
}

sub ThrowTemplateError {
    my ($template_err) = @_;

    # Make sure any locked tables are unlocked
    # and the transaction is rolled back (if supported)
    Bugzilla->dbh->bz_unlock_tables(UNLOCK_ABORT);

    my $vars = {};
    if (Bugzilla->error_mode == ERROR_MODE_DIE) {
        die("error: template error: $template_err");
    }

    $vars->{'template_error_msg'} = $template_err;
    $vars->{'error'} = "template_error";

    my $template = Bugzilla->template;

    # Try a template first; but if this one fails too, fall back
    # on plain old print statements.
    if (!$template->process("global/code-error.html.tmpl", $vars)) {
        my $maintainer = Bugzilla->params->{'maintainer'};
        my $error = html_quote($vars->{'template_error_msg'});
        my $error2 = html_quote($template->error());
        print <<END;
        <tt>
          <p>
            Bugzilla has suffered an internal error. Please save this page and 
            send it to $maintainer with details of what you were doing at the 
            time this message appeared.
          </p>
          <script type="text/javascript"> <!--
          document.write("<p>URL: " + 
                          document.location.href.replace(/&/g,"&amp;")
                                                .replace(/</g,"&lt;")
                                                .replace(/>/g,"&gt;") + "</p>");
          // -->
          </script>
          <p>Template->process() failed twice.<br>
          First error: $error<br>
          Second error: $error2</p>
        </tt>
END
    }
    exit;
}

1;

__END__

=head1 NAME

Bugzilla::Error - Error handling utilities for Bugzilla

=head1 SYNOPSIS

  use Bugzilla::Error;

  ThrowUserError("error_tag",
                 { foo => 'bar' });

=head1 DESCRIPTION

Various places throughout the Bugzilla codebase need to report errors to the
user. The C<Throw*Error> family of functions allow this to be done in a
generic and localisable manner.

These functions automatically unlock the database tables, if there were any
locked. They will also roll back the transaction, if it is supported by
the underlying DB.

=head1 FUNCTIONS

=over 4

=item C<ThrowUserError>

This function takes an error tag as the first argument, and an optional hashref
of variables as a second argument. These are used by the
I<global/user-error.html.tmpl> template to format the error, using the passed
in variables as required.

=item C<ThrowCodeError>

This function is used when an internal check detects an error of some sort.
This usually indicates a bug in Bugzilla, although it can occur if the user
manually constructs urls without correct parameters.

This function's behaviour is similar to C<ThrowUserError>, except that the
template used to display errors is I<global/code-error.html.tmpl>. In addition
if the hashref used as the optional second argument contains a key I<variables>
then the contents of the hashref (which is expected to be another hashref) will
be displayed after the error message, as a debugging aid.

=item C<ThrowTemplateError>

This function should only be called if a C<template-<gt>process()> fails.
It tries another template first, because often one template being
broken or missing doesn't mean that they all are. But it falls back to
a print statement as a last-ditch error.

=back

=head1 SEE ALSO

L<Bugzilla|Bugzilla>