summaryrefslogtreecommitdiffstats
path: root/Bugzilla/Mailer.pm
blob: 28b61b84276a140147ca1746557caa177ca56f0f (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
217
218
219
220
221
222
223
224
225
226
227
228
229
230
231
232
233
234
235
236
237
238
239
240
241
242
243
244
245
246
247
248
249
250
251
252
253
254
255
256
257
258
259
260
261
262
263
264
265
266
267
268
269
270
271
272
273
274
275
276
277
278
279
280
281
282
283
284
285
286
287
288
289
290
291
292
293
294
295
296
297
298
299
300
301
302
303
304
305
306
# 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::Mailer;

use 5.14.0;
use strict;
use warnings;

use parent qw(Exporter);
@Bugzilla::Mailer::EXPORT = qw(MessageToMTA build_thread_marker generate_email);

use Bugzilla::Constants;
use Bugzilla::Error;
use Bugzilla::Hook;
use Bugzilla::MIME;
use Bugzilla::User;
use Bugzilla::Util;

use Date::Format qw(time2str);

use Email::Sender::Simple qw(sendmail);
use Email::Sender::Transport::SMTP::Persistent;
use Bugzilla::Sender::Transport::Sendmail;

sub generate_email {
    my ($vars, $templates) = @_;
    my ($lang, $email_format, $msg_text, $msg_html, $msg_header);

    if ($vars->{to_user}) {
        $lang = $vars->{to_user}->setting('lang');
        $email_format = $vars->{to_user}->setting('email_format');
    } else {
        # If there are users in the CC list who don't have an account,
        # use the default language for email notifications.
        $lang = Bugzilla::User->new()->setting('lang');
        # However we cannot fall back to the default email_format, since
        # it may be HTML, and many of the includes used in the HTML
        # template require a valid user object. Instead we fall back to
        # the plaintext template.
        $email_format = 'text_only';
    }

    my $template = Bugzilla->template_inner($lang);

    $template->process($templates->{header}, $vars, \$msg_header)
        || ThrowTemplateError($template->error());
    $template->process($templates->{text}, $vars, \$msg_text)
        || ThrowTemplateError($template->error());

    my @parts = (
        Bugzilla::MIME->create(
            attributes => {
                content_type => 'text/plain',
                charset      => 'UTF-8',
                encoding     => 'quoted-printable',
            },
            body_str => $msg_text,
        )
    );
    if ($templates->{html} && $email_format eq 'html') {
        $template->process($templates->{html}, $vars, \$msg_html)
            || ThrowTemplateError($template->error());
        push @parts, Bugzilla::MIME->create(
            attributes => {
                content_type => 'text/html',
                charset      => 'UTF-8',
                encoding     => 'quoted-printable',
            },
            body_str => $msg_html,
        );
    }

    my $email = Bugzilla::MIME->new($msg_header);
    if (scalar(@parts) == 1) {
        $email->content_type_set($parts[0]->content_type);
    } else {
        $email->content_type_set('multipart/alternative');
        # Some mail clients need same encoding for each part, even empty ones.
        $email->charset_set('UTF-8');
    }
    $email->parts_set(\@parts);
    return $email;
}

sub MessageToMTA {
    my ($msg, $send_now) = (@_);
    my $method = Bugzilla->params->{'mail_delivery_method'};
    return if $method eq 'None';

    if (Bugzilla->params->{'use_mailer_queue'}
        && ! $send_now
        && ! Bugzilla->dbh->bz_in_transaction()
    ) {
        Bugzilla->job_queue->insert('send_mail', { msg => $msg });
        return;
    }

    my $dbh = Bugzilla->dbh;

    my $email = ref($msg) ? $msg : Bugzilla::MIME->new($msg);

    # If we're called from within a transaction, we don't want to send the
    # email immediately, in case the transaction is rolled back. Instead we
    # insert it into the mail_staging table, and bz_commit_transaction calls
    # send_staged_mail() after the transaction is committed.
    if (! $send_now && $dbh->bz_in_transaction()) {
        # The e-mail string may contain tainted values.
        my $string = $email->as_string;
        trick_taint($string);

        my $sth = $dbh->prepare("INSERT INTO mail_staging (message) VALUES (?)");
        $sth->bind_param(1, $string, $dbh->BLOB_TYPE);
        $sth->execute;
        return;
    }

    # Ensure that we are not sending emails too quickly to recipients.
    if (Bugzilla->params->{use_mailer_queue}
        && (EMAIL_LIMIT_PER_MINUTE || EMAIL_LIMIT_PER_HOUR))
    {
        $dbh->do(
            "DELETE FROM email_rates WHERE message_ts < "
            . $dbh->sql_date_math('LOCALTIMESTAMP(0)', '-', '1', 'HOUR'));

        my $recipient = $email->header('To');

        if (EMAIL_LIMIT_PER_MINUTE) {
            my $minute_rate = $dbh->selectrow_array(
                "SELECT COUNT(*)
                   FROM email_rates
                  WHERE recipient = ?  AND message_ts >= "
                        . $dbh->sql_date_math('LOCALTIMESTAMP(0)', '-', '1', 'MINUTE'),
                undef,
                $recipient);
            if ($minute_rate >= EMAIL_LIMIT_PER_MINUTE) {
                die EMAIL_LIMIT_EXCEPTION;
            }
        }
        if (EMAIL_LIMIT_PER_HOUR) {
            my $hour_rate = $dbh->selectrow_array(
                "SELECT COUNT(*)
                   FROM email_rates
                  WHERE recipient = ?  AND message_ts >= "
                        . $dbh->sql_date_math('LOCALTIMESTAMP(0)', '-', '1', 'HOUR'),
                undef,
                $recipient);
            if ($hour_rate >= EMAIL_LIMIT_PER_HOUR) {
                die EMAIL_LIMIT_EXCEPTION;
            }
        }
    }

    my $from = $email->header('From');

    my $hostname;
    my $transport;
    if ($method eq "Sendmail") {
        if (ON_WINDOWS) {
            $transport = Bugzilla::Sender::Transport::Sendmail->new({ sendmail => SENDMAIL_EXE });
        }
        else {
            $transport = Bugzilla::Sender::Transport::Sendmail->new();
        }
    }
    else {
        # Sendmail will automatically append our hostname to the From
        # address, but other mailers won't.
        my $urlbase = Bugzilla->params->{'urlbase'};
        $urlbase =~ m|//([^:/]+)[:/]?|;
        $hostname = $1 || 'localhost';
        $from .= "\@$hostname" if $from !~ /@/;
        $email->header_set('From', $from);
        
        # Sendmail adds a Date: header also, but others may not.
        if (!defined $email->header('Date')) {
            $email->header_set('Date', time2str("%a, %d %b %Y %T %z", time()));
        }
    }

    if ($method eq "SMTP") {
        my ($host, $port) = split(/:/, Bugzilla->params->{'smtpserver'}, 2);
        $transport = Bugzilla->request_cache->{smtp} //=
          Email::Sender::Transport::SMTP::Persistent->new({
            host  => $host,
            defined($port) ? (port => $port) : (),
            sasl_username => Bugzilla->params->{'smtp_username'},
            sasl_password => Bugzilla->params->{'smtp_password'},
            helo => $hostname,
            ssl => Bugzilla->params->{'smtp_ssl'},
            debug => Bugzilla->params->{'smtp_debug'} });
    }

    Bugzilla::Hook::process('mailer_before_send', { email => $email });

    return if $email->header('to') eq '';

    if ($method eq "Test") {
        my $filename = bz_locations()->{'datadir'} . '/mailer.testfile';
        open TESTFILE, '>>:encoding(UTF-8)', $filename;
        # From - <date> is required to be a valid mbox file.
        print TESTFILE "\n\nFrom - " . $email->header('Date') . "\n" . $email->as_string;
        close TESTFILE;
    }
    else {
        # This is useful for Sendmail, so we put it out here.
        local $ENV{PATH} = SENDMAIL_PATH;
        eval { sendmail($email, { transport => $transport }) };
        if ($@) {
            ThrowCodeError('mail_send_error', { msg => $@->message, mail => $email });
        }
    }

    # insert into email_rates
    if (Bugzilla->params->{use_mailer_queue}
        && (EMAIL_LIMIT_PER_MINUTE || EMAIL_LIMIT_PER_HOUR))
    {
        $dbh->do(
            "INSERT INTO email_rates(recipient, message_ts) VALUES (?, LOCALTIMESTAMP(0))",
            undef,
            $email->header('To')
        );
    }
}

# Builds header suitable for use as a threading marker in email notifications
sub build_thread_marker {
    my ($bug_id, $user_id, $is_new) = @_;

    if (!defined $user_id) {
        $user_id = Bugzilla->user->id;
    }

    my $sitespec = '@' . Bugzilla->params->{'urlbase'};
    $sitespec =~ s/:\/\//\./; # Make the protocol look like part of the domain
    $sitespec =~ s/^([^:\/]+):(\d+)/$1/; # Remove a port number, to relocate
    if ($2) {
        $sitespec = "-$2$sitespec"; # Put the port number back in, before the '@'
    }

    my $threadingmarker;
    if ($is_new) {
        $threadingmarker = "Message-ID: <bug-$bug_id-$user_id$sitespec>";
    }
    else {
        my $rand_bits = generate_random_password(10);
        $threadingmarker = "Message-ID: <bug-$bug_id-$user_id-$rand_bits$sitespec>" .
                           "\nIn-Reply-To: <bug-$bug_id-$user_id$sitespec>" .
                           "\nReferences: <bug-$bug_id-$user_id$sitespec>";
    }

    return $threadingmarker;
}

sub send_staged_mail {
    my $dbh = Bugzilla->dbh;

    my $emails = $dbh->selectall_arrayref('SELECT id, message FROM mail_staging');
    my $sth = $dbh->prepare('DELETE FROM mail_staging WHERE id = ?');

    foreach my $email (@$emails) {
        my ($id, $message) = @$email;
        MessageToMTA($message);
        $sth->execute($id);
    }
}

1;

__END__

=head1 NAME

Bugzilla::Mailer - Provides methods for sending email

=head1 METHODS

=over

=item C<generate_email>

Generates a multi-part email message, using the supplied list of templates.

=item C<MessageToMTA>

Sends the passed message to the mail transfer agent.

The actual behaviour depends on a number of factors: if called from within a
database transaction, the message will be staged and sent when the transaction
is committed.  If email queueing is enabled, the message will be sent to
TheSchwartz job queue where it will be processed by the jobqueue daemon, else
the message is sent immediately.

=item C<build_thread_marker>

Builds header suitable for use as a threading marker in email notifications.

=item C<send_staged_mail>

Sends all staged messages -- called after a database transaction is committed.

=back