1 # Copyright (C) 2016 all contributors <meta@public-inbox.org>
2 # License: AGPL-3.0+ <https://www.gnu.org/licenses/agpl-3.0.txt>
4 # ref: https://cr.yp.to/proto/maildir.html
5 # http://wiki2.dovecot.org/MailboxFormat/Maildir
6 package PublicInbox::WatchMaildir;
10 use Email::MIME::ContentType;
11 $Email::MIME::ContentType::STRICT_PARAMS = 0; # user input is imperfect
13 use PublicInbox::Import;
15 use PublicInbox::Spawn qw(spawn);
18 my ($class, $config) = @_;
19 my (%mdmap, @mdir, $spamc);
21 # "publicinboxwatch" is the documented namespace
22 # "publicinboxlearn" is legacy but may be supported
24 foreach my $pfx (qw(publicinboxwatch publicinboxlearn)) {
25 my $k = "$pfx.watchspam";
26 if (my $spamdir = $config->{$k}) {
27 if ($spamdir =~ s/\Amaildir://) {
29 # skip "new", no MUA has seen it, yet.
30 my $cur = "$spamdir/cur";
32 $mdmap{$cur} = 'watchspam';
34 warn "unsupported $k=$spamdir\n";
39 my $k = 'publicinboxwatch.spamcheck';
40 my $spamcheck = $config->{$k};
42 if ($spamcheck eq 'spamc') {
43 $spamcheck = 'PublicInbox::Spamcheck::Spamc';
45 if ($spamcheck =~ /::/) {
46 eval "require $spamcheck";
47 $spamcheck = _spamcheck_cb($spamcheck->new);
49 warn "unsupported $k=$spamcheck\n";
53 foreach $k (keys %$config) {
54 $k =~ /\Apublicinbox\.([^\.]+)\.watch\z/ or next;
56 my $watch = $config->{$k};
57 if ($watch =~ s/\Amaildir://) {
59 my $inbox = $config->lookup_name($name);
60 if (my $wm = $inbox->{watchheader}) {
61 my ($k, $v) = split(/:/, $wm, 2);
62 $inbox->{-watchheader} = [ $k, qr/\Q$v\E/ ];
64 my $new = "$watch/new";
65 my $cur = "$watch/cur";
66 push @mdir, $new, $cur;
67 die "$new already in use\n" if $mdmap{$new};
68 die "$cur already in use\n" if $mdmap{$cur};
69 $mdmap{$new} = $mdmap{$cur} = $inbox;
71 warn "watch unsupported: $k=$watch\n";
76 my $mdre = join('|', map { quotemeta($_) } @mdir);
77 $mdre = qr!\A($mdre)/!;
79 spamcheck => $spamcheck,
89 $_->done foreach values %{$_[0]->{importers}};
93 my ($self, $paths) = @_;
94 _try_path($self, $_->{path}) foreach @$paths;
99 my ($self, $path) = @_;
100 $path =~ /:2,[A-R]*S[T-Z]*\z/i or return;
101 my $mime = _path_to_mime($path) or return;
103 $self->{config}->each_inbox(sub {
106 my $im = _importer_for($self, $ibx);
108 if (my $scrub = _scrubber_for($ibx)) {
109 my $scrubbed = $scrub->scrub($mime) or return;
110 $im->remove($scrubbed);
113 warn "error removing spam at $path from $ibx->{name}\n" if $@;
117 # used to hash the relevant portions of a message when there are conflicts
121 my $dig = Digest::SHA->new('SHA-1');
122 $dig->add($mime->header_obj->header_raw('Subject'));
123 $dig->add($mime->body_raw);
129 # probably a bad idea, but we inject a Message-Id if
130 # one is missing, here..
131 my $mid = $mime->header_obj->header_raw('Message-Id');
132 if (!defined $mid || $mid =~ /\A\s*\z/) {
133 $mid = '<' . _hash_mime2($mime) . '@generated>';
134 $mime->header_set('Message-Id', $mid);
139 my ($self, $path) = @_;
140 my @p = split(m!/+!, $path);
141 return if $p[-1] !~ /\A[a-zA-Z0-9][\w:,=\.]+\z/;
142 if ($p[-1] =~ /:2,([A-Z]+)\z/i) {
144 return if $flags =~ /[DT]/; # no [D]rafts or [T]rashed mail
146 return unless -f $path;
147 if ($path !~ $self->{mdre}) {
148 warn "unrecognized path: $path\n";
151 my $inbox = $self->{mdmap}->{$1};
153 warn "unmappable dir: $1\n";
156 if (!ref($inbox) && $inbox eq 'watchspam') {
157 return _remove_spam($self, $path);
159 my $im = _importer_for($self, $inbox);
160 my $mime = _path_to_mime($path) or return;
161 $mime->header_set($_) foreach @PublicInbox::MDA::BAD_HEADERS;
162 my $wm = $inbox->{-watchheader};
164 my $v = $mime->header_obj->header_raw($wm->[0]);
165 return unless ($v && $v =~ $wm->[1]);
167 if (my $scrub = _scrubber_for($inbox)) {
168 $mime = $scrub->scrub($mime) or return;
172 $im->add($mime, $self->{spamcheck});
177 my $cb = sub { _try_fsn_paths($self, \@_) };
178 my $mdir = $self->{mdir};
180 # lazy load here, we may support watching via IMAP IDLE
182 require Filesys::Notify::Simple;
183 my $watcher = Filesys::Notify::Simple->new($mdir);
184 $watcher->wait($cb) while (1);
189 my $mdir = $self->{mdir};
190 foreach my $dir (@$mdir) {
191 my $ok = opendir(my $dh, $dir);
193 warn "failed to open $dir: $!\n";
196 while (my $fn = readdir($dh)) {
197 _try_path($self, "$dir/$fn");
201 _done_for_now($self);
206 if (open my $fh, '<', $path) {
210 return PublicInbox::MIME->new(\$str);
211 } elsif ($!{ENOENT}) {
214 warn "failed to open $path: $!\n";
220 my ($self, $inbox) = @_;
221 my $im = $inbox->{-import} ||= eval {
222 my $git = $inbox->git;
223 my $name = $inbox->{name};
224 my $addr = $inbox->{-primary_address};
225 PublicInbox::Import->new($git, $name, $addr, $inbox);
227 $self->{importers}->{"$im"} = $im;
232 my $f = $inbox->{filter};
233 if ($f && $f =~ /::/) {
249 if ($sc->spamcheck($mime, \$tmp)) {
250 return PublicInbox::MIME->new(\$tmp);
252 warn $mime->header('Message-ID')." failed spam check\n";