-# Copyright (C) 2020 all contributors <meta@public-inbox.org>
+# Copyright (C) all contributors <meta@public-inbox.org>
# License: AGPL-3.0+ <https://www.gnu.org/licenses/agpl-3.0.txt>
#
# Each instance of this represents an IMAP client connected to
# slow storage.
#
# data notes:
-# * NNTP article numbers are UIDs and message sequence numbers (MSNs)
-# * Message sequence numbers (MSNs) can be stable since we're read-only.
-# Most IMAP clients use UIDs (I hope), and we can return a dummy
-# message if a client requests a non-existent MSN.
-
+#
+# * NNTP article numbers are UIDs, mm->created_at is UIDVALIDITY
+#
+# * public-inboxes are sliced into mailboxes of 50K messages
+# to not overload MUAs: $NEWSGROUP_NAME.$SLICE_INDEX
+# Slices are similar in concept to v2 "epochs". Epochs
+# are for the limitations of git clients, while slices are
+# for the limitations of IMAP clients.
+#
+# * We also take advantage of slices being only 50K to store
+# "UID offset" to message sequence number (MSN) mapping
+# as a 50K uint16_t array (via pack("S*", ...)). "UID offset"
+# is the offset from {uid_base} which determines the start of
+# the mailbox slice.
+#
+# fields:
+# imapd: PublicInbox::IMAPD ref
+# ibx: PublicInbox::Inbox ref
+# long_cb: long_response private data
+# uid_base: base UID for mailbox slice (0-based)
+# -login_tag: IMAP TAG for LOGIN
+# -idle_tag: IMAP response tag for IDLE
+# uo2m: UID-to-MSN mapping
package PublicInbox::IMAP;
use strict;
-use base qw(PublicInbox::DS);
-use fields qw(imapd logged_in ibx long_cb -login_tag
- -idle_tag -idle_max);
+use parent qw(PublicInbox::DS);
use PublicInbox::Eml;
+use PublicInbox::EmlContentFoo qw(parse_content_disposition);
use PublicInbox::DS qw(now);
-use PublicInbox::Syscall qw(EPOLLIN EPOLLONESHOT);
+use PublicInbox::GitAsyncCat;
+use Text::ParseWords qw(parse_line);
use Errno qw(EAGAIN);
+use PublicInbox::IMAPsearchqp;
+
my $Address;
for my $mod (qw(Email::Address::XS Mail::Address)) {
eval "require $mod" or next;
}
die "neither Email::Address::XS nor Mail::Address loaded: $@" if !$Address;
-sub LINE_MAX () { 512 } # does RFC 3501 have a limit like RFC 977?
-
-my %FETCH_NEED_BLOB = ( # for future optimization
- 'BODY.PEEK[HEADER]' => 1,
- 'BODY.PEEK[TEXT]' => 1,
- 'BODY.PEEK[]' => 1,
- 'BODY[HEADER]' => 1,
- 'BODY[TEXT]' => 1,
- 'BODY[]' => 1,
- 'RFC822.HEADER' => 1,
- 'RFC822.SIZE' => 1, # needs CRLF conversion :<
- 'RFC822.TEXT' => 1,
- BODY => 1,
- BODYSTRUCTURE => 1,
- ENVELOPE => 1,
- FLAGS => 0,
- INTERNALDATE => 0,
- RFC822 => 1,
- UID => 0,
+sub LINE_MAX () { 8000 } # RFC 2683 3.2.1.5
+
+# Changing UID_SLICE will cause grief for clients which cache.
+# This also needs to be <64K: we pack it into a uint16_t
+# for long_response UID (offset) => MSN mappings
+sub UID_SLICE () { 50_000 }
+
+# these values area also used for sorting
+sub NEED_SMSG () { 1 }
+sub NEED_BLOB () { NEED_SMSG|2 }
+sub CRLF_BREF () { 4 }
+sub EML_HDR () { 8 }
+sub CRLF_HDR () { 16 }
+sub EML_BDY () { 32 }
+sub CRLF_BDY () { 64 }
+my $OP_EML_NEW = [ EML_HDR - 1, \&op_eml_new ];
+my $OP_CRLF_BREF = [ CRLF_BREF, \&op_crlf_bref ];
+my $OP_CRLF_HDR = [ CRLF_HDR, \&op_crlf_hdr ];
+my $OP_CRLF_BDY = [ CRLF_BDY, \&op_crlf_bdy ];
+
+my %FETCH_NEED = (
+ 'BODY[HEADER]' => [ NEED_BLOB|EML_HDR|CRLF_HDR, \&emit_rfc822_header ],
+ 'BODY[TEXT]' => [ NEED_BLOB|EML_BDY|CRLF_BDY, \&emit_rfc822_text ],
+ 'BODY[]' => [ NEED_BLOB|CRLF_BREF, \&emit_rfc822 ],
+ 'RFC822.HEADER' => [ NEED_BLOB|EML_HDR|CRLF_HDR, \&emit_rfc822_header ],
+ 'RFC822.TEXT' => [ NEED_BLOB|EML_BDY|CRLF_BDY, \&emit_rfc822_text ],
+ 'RFC822.SIZE' => [ NEED_SMSG, \&emit_rfc822_size ],
+ RFC822 => [ NEED_BLOB|CRLF_BREF, \&emit_rfc822 ],
+ BODY => [ NEED_BLOB|EML_HDR|EML_BDY, \&emit_body ],
+ BODYSTRUCTURE => [ NEED_BLOB|EML_HDR|EML_BDY, \&emit_bodystructure ],
+ ENVELOPE => [ NEED_BLOB|EML_HDR, \&emit_envelope ],
+ FLAGS => [ 0, \&emit_flags ],
+ INTERNALDATE => [ NEED_SMSG, \&emit_internaldate ],
);
-my %FETCH_ATT = map { $_ => [ $_ ] } keys %FETCH_NEED_BLOB;
+my %FETCH_ATT = map { $_ => [ $_ ] } keys %FETCH_NEED;
# aliases (RFC 3501 section 6.4.5)
$FETCH_ATT{FAST} = [ qw(FLAGS INTERNALDATE RFC822.SIZE) ];
$FETCH_ATT{FULL} = [ @{$FETCH_ATT{ALL}}, 'BODY' ];
for my $att (keys %FETCH_ATT) {
- my %h = map { $_ => 1 } @{$FETCH_ATT{$att}};
+ my %h = map { $_ => $FETCH_NEED{$_} } @{$FETCH_ATT{$att}};
$FETCH_ATT{$att} = \%h;
}
+undef %FETCH_NEED;
-sub greet ($) {
+my $valid_range = '[0-9]+|[0-9]+:[0-9]+|[0-9]+:\*';
+$valid_range = qr/\A(?:$valid_range)(?:,(?:$valid_range))*\z/;
+
+sub do_greet {
my ($self) = @_;
my $capa = capa($self);
$self->write(\"* OK [$capa] public-inbox-imapd ready\r\n");
}
-sub new ($$$) {
- my ($class, $sock, $imapd) = @_;
- my $self = fields::new($class);
- my $ev = EPOLLIN;
- my $wbuf;
- if ($sock->can('accept_SSL') && !$sock->accept_SSL) {
- return CORE::close($sock) if $! != EAGAIN;
- $ev = PublicInbox::TLS::epollbit();
- $wbuf = [ \&PublicInbox::DS::accept_tls_step, \&greet ];
- }
- $self->SUPER::new($sock, $ev | EPOLLONESHOT);
- $self->{imapd} = $imapd;
- if ($wbuf) {
- $self->{wbuf} = $wbuf;
- } else {
- greet($self);
- }
- $self->update_idle_time;
- $self;
+sub new {
+ my (undef, $sock, $imapd) = @_;
+ (bless { imapd => $imapd }, 'PublicInbox::IMAP_preauth')->greet($sock)
}
+sub logged_in { 1 }
+
sub capa ($) {
my ($self) = @_;
# dovecot advertises IDLE pre-login; perhaps because some clients
# depend on it, so we'll do the same
my $capa = 'CAPABILITY IMAP4rev1 IDLE';
- if ($self->{logged_in}) {
+ if ($self->logged_in) {
$capa .= ' COMPRESS=DEFLATE';
} else {
if (!($self->{sock} // $self)->can('accept_SSL') &&
sub login_success ($$) {
my ($self, $tag) = @_;
- $self->{logged_in} = 1;
+ bless $self, 'PublicInbox::IMAP';
my $capa = capa($self);
"$tag OK [$capa] Logged in\r\n";
}
login_success($self, $tag);
}
+sub cmd_close ($$) {
+ my ($self, $tag) = @_;
+ delete @$self{qw(uid_base uo2m)};
+ delete $self->{ibx} ? "$tag OK Close done\r\n"
+ : "$tag BAD No mailbox\r\n";
+}
+
sub cmd_logout ($$) {
my ($self, $tag) = @_;
- delete $self->{logged_in};
- $self->write(\"* BYE logging out\r\n$tag OK logout completed\r\n");
+ delete $self->{-idle_tag};
+ $self->write(\"* BYE logging out\r\n$tag OK Logout done\r\n");
$self->shutdn; # PublicInbox::DS::shutdn
undef;
}
sub cmd_capability ($$) {
my ($self, $tag) = @_;
- '* '.capa($self)."\r\n$tag OK\r\n";
+ '* '.capa($self)."\r\n$tag OK Capability done\r\n";
}
-sub cmd_noop ($$) { "$_[1] OK NOOP completed\r\n" }
+# uo2m: UID Offset to MSN, this is an arrayref by default,
+# but uo2m_hibernate can compact and deduplicate it
+sub uo2m_ary_new ($;$) {
+ my ($self, $exists) = @_;
+ my $ub = $self->{uid_base};
+ my $uids = $self->{ibx}->over(1)->uid_range($ub + 1, $ub + UID_SLICE);
+
+ # convert UIDs to offsets from {base}
+ my @tmp; # [$UID_OFFSET] => $MSN
+ my $msn = 0;
+ ++$ub;
+ $tmp[$_ - $ub] = ++$msn for @$uids;
+ $$exists = $msn if $exists;
+ \@tmp;
+}
+
+# changes UID-offset-to-MSN mapping into a deduplicated scalar:
+# uint16_t uo2m[UID_SLICE].
+# May be swapped out for idle clients if THP is disabled.
+sub uo2m_hibernate ($) {
+ my ($self) = @_;
+ ref(my $uo2m = $self->{uo2m}) or return;
+ my %dedupe = ( uo2m_pack($uo2m) => undef );
+ $self->{uo2m} = (keys(%dedupe))[0];
+ undef;
+}
+
+sub uo2m_last_uid ($) {
+ my ($self) = @_;
+ defined(my $uo2m = $self->{uo2m}) or die 'BUG: uo2m_last_uid w/o {uo2m}';
+ (ref($uo2m) ? @$uo2m : (length($uo2m) >> 1)) + $self->{uid_base};
+}
+
+sub uo2m_pack ($) {
+ # $_[0] is an arrayref of MSNs, it may have undef gaps if there
+ # are gaps in the corresponding UIDs: [ msn1, msn2, undef, msn3 ]
+ no warnings 'uninitialized';
+ pack('S*', @{$_[0]});
+}
+
+# extend {uo2m} to account for new messages which arrived since
+# {uo2m} was created.
+sub uo2m_extend ($$;$) {
+ my ($self, $new_uid_max) = @_;
+ defined(my $uo2m = $self->{uo2m}) or
+ return($self->{uo2m} = uo2m_ary_new($self));
+ my $beg = uo2m_last_uid($self); # last UID we've learned
+ return $uo2m if $beg >= $new_uid_max; # fast path
+
+ # need to extend the current range:
+ my $base = $self->{uid_base};
+ ++$beg;
+ my $uids = $self->{ibx}->over(1)->uid_range($beg, $base + UID_SLICE);
+ return $uo2m if !scalar(@$uids);
+ my @tmp; # [$UID_OFFSET] => $MSN
+ my $write_method = $_[2] // 'msg_more';
+ if (ref($uo2m)) {
+ my $msn = $uo2m->[-1];
+ $tmp[$_ - $beg] = ++$msn for @$uids;
+ $self->$write_method("* $msn EXISTS\r\n");
+ push @$uo2m, @tmp;
+ $uo2m;
+ } else {
+ my $msn = unpack('S', substr($uo2m, -2, 2));
+ $tmp[$_ - $beg] = ++$msn for @$uids;
+ $self->$write_method("* $msn EXISTS\r\n");
+ $uo2m .= uo2m_pack(\@tmp);
+ my %dedupe = ($uo2m => undef);
+ $self->{uo2m} = (keys %dedupe)[0];
+ }
+}
+
+sub cmd_noop ($$) {
+ my ($self, $tag) = @_;
+ defined($self->{uid_base}) and
+ uo2m_extend($self, $self->{uid_base} + UID_SLICE);
+ \"$tag OK Noop done\r\n";
+}
+
+# the flexible version which works on scalars and array refs.
+# Must call uo2m_extend before this
+sub uid2msn ($$) {
+ my ($self, $uid) = @_;
+ my $uo2m = $self->{uo2m};
+ my $off = $uid - $self->{uid_base} - 1;
+ ref($uo2m) ? $uo2m->[$off] : unpack('S', substr($uo2m, $off << 1, 2));
+}
+
+# returns an arrayref of UIDs, so MSNs can be translated to UIDs via:
+# $msn2uid->[$MSN-1] => $UID. The result of this is always ephemeral
+# and does not live beyond the event loop.
+sub msn2uid ($) {
+ my ($self) = @_;
+ my $base = $self->{uid_base};
+ my $uo2m = uo2m_extend($self, $base + UID_SLICE);
+ $uo2m = [ unpack('S*', $uo2m) ] if !ref($uo2m);
+
+ my $uo = 0;
+ my @msn2uid;
+ for my $msn (@$uo2m) {
+ ++$uo;
+ $msn2uid[$msn - 1] = $uo + $base if $msn;
+ }
+ \@msn2uid;
+}
+
+# converts a set of message sequence numbers in requests to UIDs:
+sub msn_to_uid_range ($$) {
+ my $msn2uid = $_[0];
+ $_[1] =~ s!([0-9]+)!$msn2uid->[$1 - 1] // ($msn2uid->[-1] // 0 + 1)!sge;
+}
# called by PublicInbox::InboxIdle
sub on_inbox_unlock {
my ($self, $ibx) = @_;
- my $new = $ibx->mm->max;
- defined(my $old = $self->{-idle_max}) or die 'BUG: -idle_max unset';
- if ($new > $old) {
- $self->{-idle_max} = $new;
- $self->msg_more("* $_ EXISTS\r\n") for (($old + 1)..($new - 1));
- $self->write(\"* $new EXISTS\r\n");
+ my $uid_end = $self->{uid_base} + UID_SLICE;
+ uo2m_extend($self, $uid_end, 'write');
+ my $new = uo2m_last_uid($self);
+ if ($new == $uid_end) { # max exceeded $uid_end
+ # continue idling w/o inotify
+ my $sock = $self->{sock} or return;
+ $ibx->unsubscribe_unlock(fileno($sock));
}
}
+# called every minute or so by PublicInbox::DS::later
+my $IDLERS; # fileno($obj->{sock}) => PublicInbox::IMAP
+sub idle_tick_all {
+ my $old = $IDLERS;
+ $IDLERS = undef;
+ for my $i (values %$old) {
+ next if ($i->{wbuf} || !exists($i->{-idle_tag}));
+ $IDLERS->{fileno($i->{sock})} = $i;
+ $i->write(\"* OK Still here\r\n");
+ }
+ $IDLERS and
+ PublicInbox::DS::add_uniq_timer('idle', 60, \&idle_tick_all);
+}
+
sub cmd_idle ($$) {
my ($self, $tag) = @_;
# IDLE seems allowed by dovecot w/o a mailbox selected *shrug*
my $ibx = $self->{ibx} or return "$tag BAD no mailbox selected\r\n";
- $ibx->subscribe_unlock(fileno($self->{sock}), $self);
- $self->{imapd}->idler_start;
+ my $uid_end = $self->{uid_base} + UID_SLICE;
+ uo2m_extend($self, $uid_end);
+ my $sock = $self->{sock} or return;
+ my $fd = fileno($sock);
$self->{-idle_tag} = $tag;
- $self->{-idle_max} = $ibx->mm->max // 0;
- "+ idling\r\n"
+ # only do inotify on most recent slice
+ if ($ibx->over(1)->max < $uid_end) {
+ $ibx->subscribe_unlock($fd, $self);
+ $self->{imapd}->idler_start;
+ }
+ PublicInbox::DS::add_uniq_timer('idle', 60, \&idle_tick_all);
+ $IDLERS->{$fd} = $self;
+ \"+ idling\r\n"
}
-sub cmd_done ($$) {
+sub stop_idle ($$) {
+ my ($self, $ibx) = @_;
+ my $sock = $self->{sock} or return;
+ my $fd = fileno($sock);
+ delete $IDLERS->{$fd};
+ $ibx->unsubscribe_unlock($fd);
+}
+
+sub idle_done ($$) {
my ($self, $tag) = @_; # $tag is "DONE" (case-insensitive)
defined(my $idle_tag = delete $self->{-idle_tag}) or
return "$tag BAD not idle\r\n";
warn "BUG: idle_tag set w/o inbox";
return "$tag BAD internal bug\r\n";
};
- $ibx->unsubscribe_unlock(fileno($self->{sock}));
- "$idle_tag OK Idle completed\r\n";
+ stop_idle($self, $ibx);
+ "$idle_tag OK Idle done\r\n";
+}
+
+sub ensure_slices_exist ($$$) {
+ my ($imapd, $ibx, $max) = @_;
+ defined(my $mb_top = $ibx->{newsgroup}) or return;
+ my $mailboxes = $imapd->{mailboxes};
+ my @created;
+ for (my $i = int($max/UID_SLICE); $i >= 0; --$i) {
+ my $sub_mailbox = "$mb_top.$i";
+ last if exists $mailboxes->{$sub_mailbox};
+ $mailboxes->{$sub_mailbox} = $ibx;
+ $sub_mailbox =~ s/\Ainbox\./INBOX./i; # more familiar to users
+ push @created, $sub_mailbox;
+ }
+ return unless @created;
+ my $l = $imapd->{mailboxlist} or return;
+ push @$l, map { qq[* LIST (\\HasNoChildren) "." $_\r\n] } @created;
+}
+
+sub inbox_lookup ($$;$) {
+ my ($self, $mailbox, $examine) = @_;
+ my ($ibx, $exists, $uidmax, $uid_base) = (undef, 0, 0, 0);
+ $mailbox = lc $mailbox;
+ $ibx = $self->{imapd}->{mailboxes}->{$mailbox} or return;
+ my $over = $ibx->over(1);
+ if ($over != $ibx) { # not a dummy
+ $mailbox =~ /\.([0-9]+)\z/ or
+ die "BUG: unexpected dummy mailbox: $mailbox\n";
+ $uid_base = $1 * UID_SLICE;
+
+ $uidmax = $ibx->mm->num_highwater // 0;
+ if ($examine) {
+ $self->{uid_base} = $uid_base;
+ $self->{ibx} = $ibx;
+ $self->{uo2m} = uo2m_ary_new($self, \$exists);
+ } else {
+ my $uid_end = $uid_base + UID_SLICE;
+ $exists = $over->imap_exists($uid_base, $uid_end);
+ }
+ ensure_slices_exist($self->{imapd}, $ibx, $over->max);
+ } else {
+ if ($examine) {
+ $self->{uid_base} = $uid_base;
+ $self->{ibx} = $ibx;
+ delete $self->{uo2m};
+ }
+ # if "INBOX.foo.bar" is selected and "INBOX.foo.bar.0",
+ # check for new UID ranges (e.g. "INBOX.foo.bar.1")
+ if (my $z = $self->{imapd}->{mailboxes}->{"$mailbox.0"}) {
+ ensure_slices_exist($self->{imapd}, $z,
+ $z->over(1)->max);
+ }
+ }
+ ($ibx, $exists, $uidmax + 1, $uid_base);
}
sub cmd_examine ($$$) {
my ($self, $tag, $mailbox) = @_;
- my $ibx = $self->{imapd}->{groups}->{$mailbox} or
- return "$tag NO Mailbox doesn't exist: $mailbox\r\n";
- my $mm = $ibx->mm;
- my $max = $mm->max // 0;
- # RFC 3501 2.3.1.1 - "A good UIDVALIDITY value to use in
- # this case is a 32-bit representation of the creation
- # date/time of the mailbox"
- my $uidvalidity = $mm->created_at or return "$tag BAD UIDVALIDITY\r\n";
- my $uidnext = $max + 1;
-
# XXX: do we need this? RFC 5162/7162
my $ret = $self->{ibx} ? "* OK [CLOSED] previous closed\r\n" : '';
- $self->{ibx} = $ibx;
+ my ($ibx, $exists, $uidnext, $base) = inbox_lookup($self, $mailbox, 1);
+ return "$tag NO Mailbox doesn't exist: $mailbox\r\n" if !$ibx;
$ret .= <<EOF;
-* $max EXISTS\r
-* $max RECENT\r
+* $exists EXISTS\r
+* $exists RECENT\r
* FLAGS (\\Seen)\r
* OK [PERMANENTFLAGS ()] Read-only mailbox\r
+* OK [UNSEEN $exists]\r
+* OK [UIDNEXT $uidnext]\r
+* OK [UIDVALIDITY $ibx->{uidvalidity}]\r
+$tag OK [READ-ONLY] EXAMINE/SELECT done\r
EOF
- $ret .= "* OK [UNSEEN $max]\r\n" if $max;
- $ret .= "* OK [UIDNEXT $uidnext]\r\n" if defined $uidnext;
- $ret .= "* OK [UIDVALIDITY $uidvalidity]\r\n" if defined $uidvalidity;
- $ret .= "$tag OK [READ-ONLY] EXAMINE/SELECT complete\r\n";
}
sub _esc ($) {
) . ')';
}
-sub uid_fetch_cb { # called by git->cat_async
- my ($bref, $oid, $type, $size, $fetch_m_arg) = @_;
- my ($self, undef, $ibx, undef, undef, $msgs, $want) = @$fetch_m_arg;
- my $smsg = shift @$msgs or die 'BUG: no smsg';
- $smsg->{blob} eq $oid or die "BUG: $smsg->{blob} != $oid";
- $$bref =~ s/(?<!\r)\n/\r\n/sg; # make strict clients happy
+sub _esc_hash ($) {
+ my ($hash) = @_;
+ if ($hash && scalar keys %$hash) {
+ $hash = [ %$hash ]; # flatten hash into 1-dimensional array
+ '(' . join(' ', map { _esc($_) } @$hash) . ')';
+ } else {
+ 'NIL';
+ }
+}
- # fixup old bug from import (pre-a0c07cba0e5d8b6a)
- $$bref =~ s/\A[\r\n]*From [^\r\n]*\r\n//s;
+sub body_disposition ($) {
+ my ($eml) = @_;
+ my $cd = $eml->header_raw('Content-Disposition') or return 'NIL';
+ $cd = parse_content_disposition($cd);
+ my $buf = '('._esc($cd->{type});
+ $buf .= ' ' . _esc_hash($cd->{attributes});
+ $buf .= ')';
+}
- $self->msg_more("* $smsg->{num} FETCH (UID $smsg->{num}");
+sub body_leaf ($$;$) {
+ my ($eml, $structure, $hold) = @_;
+ my $buf = '';
+ $eml->{is_submsg} and # parent was a message/(rfc822|news|global)
+ $buf .= eml_envelope($eml). ' ';
+ my $ct = $eml->ct;
+ $buf .= '('._esc($ct->{type}).' ';
+ $buf .= _esc($ct->{subtype});
+ $buf .= ' ' . _esc_hash($ct->{attributes});
+ $buf .= ' ' . _esc($eml->header_raw('Content-ID'));
+ $buf .= ' ' . _esc($eml->header_raw('Content-Description'));
+ my $cte = $eml->header_raw('Content-Transfer-Encoding') // '7bit';
+ $buf .= ' ' . _esc($cte);
+ $buf .= ' ' . $eml->{imap_body_len};
+ $buf .= ' '.($eml->body_raw =~ tr/\n/\n/) if lc($ct->{type}) eq 'text';
+
+ # for message/(rfc822|global|news), $hold[0] should have envelope
+ $buf .= ' ' . (@$hold ? join('', @$hold) : 'NIL') if $hold;
+
+ if ($structure) {
+ $buf .= ' '._esc($eml->header_raw('Content-MD5'));
+ $buf .= ' '. body_disposition($eml);
+ $buf .= ' '._esc($eml->header_raw('Content-Language'));
+ $buf .= ' '._esc($eml->header_raw('Content-Location'));
+ }
+ $buf .= ')';
+}
- $want->{'RFC822.SIZE'} and
- $self->msg_more(' RFC822.SIZE '.length($$bref));
- $want->{INTERNALDATE} and
- $self->msg_more(' INTERNALDATE "'.$smsg->internaldate.'"');
- $want->{FLAGS} and $self->msg_more(' FLAGS ()');
- for ('RFC822', 'BODY[]', 'BODY.PEEK[]') {
- next unless $want->{$_};
- $self->msg_more(" $_ {".length($$bref)."}\r\n");
- $self->msg_more($$bref);
+sub body_parent ($$$) {
+ my ($eml, $structure, $hold) = @_;
+ my $ct = $eml->ct;
+ my $type = lc($ct->{type});
+ if ($type eq 'multipart') {
+ my $buf = '(';
+ $buf .= @$hold ? join('', @$hold) : 'NIL';
+ $buf .= ' '._esc($ct->{subtype});
+ if ($structure) {
+ $buf .= ' '._esc_hash($ct->{attributes});
+ $buf .= ' '.body_disposition($eml);
+ $buf .= ' '._esc($eml->header_raw('Content-Language'));
+ $buf .= ' '._esc($eml->header_raw('Content-Location'));
+ }
+ $buf .= ')';
+ @$hold = ($buf);
+ } else { # message/(rfc822|global|news)
+ @$hold = (body_leaf($eml, $structure, $hold));
}
+}
- my $eml = PublicInbox::Eml->new($bref);
+# this is gross, but we need to process the parent part AFTER
+# the child parts are done
+sub bodystructure_prep {
+ my ($p, $q) = @_;
+ my ($eml, $depth) = @$p; # ignore idx
+ # set length here, as $eml->{bdy} gets deleted for message/rfc822
+ $eml->{imap_body_len} = length($eml->body_raw);
+ push @$q, $eml, $depth;
+}
- $want->{ENVELOPE} and
- $self->msg_more(' ENVELOPE '.eml_envelope($eml));
+# for FETCH BODY and FETCH BODYSTRUCTURE
+sub fetch_body ($;$) {
+ my ($eml, $structure) = @_;
+ my @q;
+ $eml->each_part(\&bodystructure_prep, \@q, 0, 1);
+ my $cur_depth = 0;
+ my @hold;
+ do {
+ my ($part, $depth) = splice(@q, -2);
+ my $is_mp_parent = $depth == ($cur_depth - 1);
+ $cur_depth = $depth;
+
+ if ($is_mp_parent) {
+ body_parent($part, $structure, \@hold);
+ } else {
+ unshift @hold, body_leaf($part, $structure);
+ }
+ } while (@q);
+ join('', @hold);
+}
- for my $f ('RFC822.HEADER', 'BODY[HEADER]', 'BODY.PEEK[HEADER]') {
- next unless $want->{$f};
- $self->msg_more(" $f {".length(${$eml->{hdr}})."}\r\n");
- $self->msg_more(${$eml->{hdr}});
- }
- for my $f ('RFC822.TEXT', 'BODY[TEXT]') {
- next unless $want->{$f};
- $self->msg_more(" $f {".length($$bref)."}\r\n");
- $self->msg_more($$bref);
+sub fetch_run_ops {
+ my ($self, $smsg, $bref, $ops, $partial) = @_;
+ my $uid = $smsg->{num};
+ $self->msg_more('* '.uid2msn($self, $uid)." FETCH (UID $uid");
+ my ($eml, $k);
+ for (my $i = 0; $i < @$ops;) {
+ $k = $ops->[$i++];
+ $ops->[$i++]->($self, $k, $smsg, $bref, $eml);
}
- # TODO BODY/BODYSTRUCTURE, specific headers
+ partial_emit($self, $partial, $eml) if $partial;
$self->msg_more(")\r\n");
}
-sub uid_fetch_m { # long_response
- my ($self, $tag, $ibx, $beg, $end, $msgs, $want) = @_;
- if (!@$msgs) { # refill
- @$msgs = @{$ibx->over->query_xover($$beg, $end)};
- if (!@$msgs) {
- $self->write(\"$tag OK Fetch done\r\n");
- return;
- }
- $$beg = $msgs->[-1]->{num} + 1;
+sub fetch_blob_cb { # called by git->cat_async via ibx_async_cat
+ my ($bref, $oid, $type, $size, $fetch_arg) = @_;
+ my ($self, undef, $msgs, $range_info, $ops, $partial) = @$fetch_arg;
+ my $ibx = $self->{ibx} or return $self->close; # client disconnected
+ my $smsg = shift @$msgs or die 'BUG: no smsg';
+ if (!defined($oid)) {
+ # it's possible to have TOCTOU if an admin runs
+ # public-inbox-(edit|purge), just move onto the next message
+ warn "E: $smsg->{blob} missing in $ibx->{inboxdir}\n";
+ return $self->requeue_once;
+ } else {
+ $smsg->{blob} eq $oid or die "BUG: $smsg->{blob} != $oid";
+ }
+ my $pre;
+ if (!$self->{wbuf} && (my $nxt = $msgs->[0])) {
+ $pre = ibx_async_prefetch($ibx, $nxt->{blob},
+ \&fetch_blob_cb, $fetch_arg);
}
- my $git = $ibx->git;
- $git->cat_async_begin; # TODO: actually make async
- $git->cat_async($msgs->[0]->{blob}, \&uid_fetch_cb, \@_);
- $git->cat_async_wait;
- 1;
+ fetch_run_ops($self, $smsg, $bref, $ops, $partial);
+ $pre ? $self->zflush : $self->requeue_once;
}
-sub cmd_uid_fetch ($$$;@) {
- my ($self, $tag, $range, @want) = @_;
- my $ibx = $self->{ibx} or return "$tag BAD No mailbox selected\r\n";
- if ($want[0] =~ s/\A\(//s) {
- $want[-1] =~ s/\)\z//s or return "$tag BAD no rparen\r\n";
- }
- my %want = map {;
- my $x = $FETCH_ATT{uc($_)} or return "$tag BAD param: $_\r\n";
- %$x;
- } @want;
- my ($beg, $end);
- my $msgs = [];
- if ($range =~ /\A([0-9]+):([0-9]+)\z/s) {
- ($beg, $end) = ($1, $2);
- } elsif ($range =~ /\A([0-9]+):\*\z/s) {
- ($beg, $end) = ($1, $ibx->mm->max // 0);
+sub emit_rfc822 {
+ my ($self, $k, undef, $bref) = @_;
+ $self->msg_more(" $k {" . length($$bref)."}\r\n");
+ $self->msg_more($$bref);
+}
+
+# Mail::IMAPClient::message_string cares about this by default,
+# (->Ignoresizeerrors attribute). Admins are encouraged to
+# --reindex for IMAP support, anyways.
+sub emit_rfc822_size {
+ my ($self, $k, $smsg) = @_;
+ $self->msg_more(' RFC822.SIZE ' . $smsg->{bytes});
+}
+
+sub emit_internaldate {
+ my ($self, undef, $smsg) = @_;
+ $self->msg_more(' INTERNALDATE "'.$smsg->internaldate.'"');
+}
+
+sub emit_flags { $_[0]->msg_more(' FLAGS ()') }
+
+sub emit_envelope {
+ my ($self, undef, undef, undef, $eml) = @_;
+ $self->msg_more(' ENVELOPE '.eml_envelope($eml));
+}
+
+sub emit_rfc822_header {
+ my ($self, $k, undef, undef, $eml) = @_;
+ $self->msg_more(" $k {".length(${$eml->{hdr}})."}\r\n");
+ $self->msg_more(${$eml->{hdr}});
+}
+
+# n.b. this is sorted to be after any emit_eml_new ops
+sub emit_rfc822_text {
+ my ($self, $k, undef, $bref) = @_;
+ $self->msg_more(" $k {".length($$bref)."}\r\n");
+ $self->msg_more($$bref);
+}
+
+sub emit_bodystructure {
+ my ($self, undef, undef, undef, $eml) = @_;
+ $self->msg_more(' BODYSTRUCTURE '.fetch_body($eml, 1));
+}
+
+sub emit_body {
+ my ($self, undef, undef, undef, $eml) = @_;
+ $self->msg_more(' BODY '.fetch_body($eml));
+}
+
+# set $eml once ($_[4] == $eml, $_[3] == $bref)
+sub op_eml_new { $_[4] = PublicInbox::Eml->new($_[3]) }
+
+# s/From / fixes old bug from import (pre-a0c07cba0e5d8b6a)
+sub to_crlf_full {
+ ${$_[0]} =~ s/(?<!\r)\n/\r\n/sg;
+ ${$_[0]} =~ s/\A[\r\n]*From [^\r\n]*\r\n//s;
+}
+
+sub op_crlf_bref { to_crlf_full($_[3]) }
+
+sub op_crlf_hdr { to_crlf_full($_[4]->{hdr}) }
+
+sub op_crlf_bdy { ${$_[4]->{bdy}} =~ s/(?<!\r)\n/\r\n/sg if $_[4]->{bdy} }
+
+sub uid_clamp ($$$) {
+ my ($self, $beg, $end) = @_;
+ my $uid_min = $self->{uid_base} + 1;
+ my $uid_end = $uid_min + UID_SLICE - 1;
+ $$beg = $uid_min if $$beg < $uid_min;
+ $$end = $uid_end if $$end > $uid_end;
+}
+
+sub range_step ($$) {
+ my ($self, $range_csv) = @_;
+ my ($beg, $end, $range);
+ if ($$range_csv =~ s/\A([^,]+),//) {
+ $range = $1;
+ } else {
+ $range = $$range_csv;
+ $$range_csv = undef;
+ }
+ my $uid_base = $self->{uid_base};
+ my $uid_end = $uid_base + UID_SLICE;
+ if ($range =~ /\A([0-9]+):([0-9]+)\z/) {
+ ($beg, $end) = ($1 + 0, $2 + 0);
+ uid_clamp($self, \$beg, \$end);
+ } elsif ($range =~ /\A([0-9]+):\*\z/) {
+ $beg = $1 + 0;
+ $end = $self->{ibx}->over(1)->max;
+ $end = $uid_end if $end > $uid_end;
+ $beg = $end if $beg > $end;
+ uid_clamp($self, \$beg, \$end);
} elsif ($range =~ /\A[0-9]+\z/) {
- my $smsg = $ibx->over->get_art($range) or return "$tag OK\r\n";
- push @$msgs, $smsg;
- ($beg, $end) = ($range, 0);
+ $beg = $end = $range + 0;
+ # just let the caller do an out-of-range query if a single
+ # UID is out-of-range
+ ++$beg if ($beg <= $uid_base || $end > $uid_end);
} else {
- return "$tag BAD\r\n";
+ return 'BAD fetch range';
}
- long_response($self, \&uid_fetch_m, $tag, $ibx,
- \$beg, $end, $msgs, \%want);
+ [ $beg, $end, $$range_csv ];
}
-sub uid_search_all { # long_response
- my ($self, $tag, $ibx, $num) = @_;
- my $uids = $ibx->mm->ids_after($num);
- if (scalar(@$uids)) {
- $self->msg_more(join(' ', '', @$uids));
- } else {
- $self->write(\"\r\n$tag OK\r\n");
- undef;
+sub refill_range ($$$) {
+ my ($self, $msgs, $range_info) = @_;
+ my ($beg, $end, $range_csv) = @$range_info;
+ if (scalar(@$msgs = @{$self->{ibx}->over(1)->query_xover($beg, $end)})){
+ $range_info->[0] = $msgs->[-1]->{num} + 1;
+ return;
}
+ return 'OK Fetch done' if !$range_csv;
+ my $next_range = range_step($self, \$range_csv);
+ return $next_range if !ref($next_range); # error
+ @$range_info = @$next_range;
+ undef; # keep looping
}
-sub uid_search_uid_range { # long_response
- my ($self, $tag, $ibx, $beg, $end) = @_;
- my $uids = $ibx->mm->msg_range($beg, $end, 'num');
- if (@$uids) {
- $self->msg_more(join('', map { " $_->[0]" } @$uids));
+sub fetch_blob { # long_response
+ my ($self, $tag, $msgs, $range_info, $ops, $partial) = @_;
+ while (!@$msgs) { # rare
+ if (my $end = refill_range($self, $msgs, $range_info)) {
+ $self->write(\"$tag $end\r\n");
+ return;
+ }
+ }
+ uo2m_extend($self, $msgs->[-1]->{num});
+ ibx_async_cat($self->{ibx}, $msgs->[0]->{blob},
+ \&fetch_blob_cb, \@_);
+}
+
+sub fetch_smsg { # long_response
+ my ($self, $tag, $msgs, $range_info, $ops) = @_;
+ while (!@$msgs) { # rare
+ if (my $end = refill_range($self, $msgs, $range_info)) {
+ $self->write(\"$tag $end\r\n");
+ return;
+ }
+ }
+ uo2m_extend($self, $msgs->[-1]->{num});
+ fetch_run_ops($self, $_, undef, $ops) for @$msgs;
+ @$msgs = ();
+ 1; # more
+}
+
+sub refill_uids ($$$;$) {
+ my ($self, $uids, $range_info, $sql) = @_;
+ my ($beg, $end, $range_csv) = @$range_info;
+ my $over = $self->{ibx}->over(1);
+ while (1) {
+ if (scalar(@$uids = @{$over->uid_range($beg, $end, $sql)})) {
+ $range_info->[0] = $uids->[-1] + 1; # update $beg
+ return;
+ } elsif (!$range_csv) {
+ return 0;
+ } else {
+ my $next_range = range_step($self, \$range_csv);
+ return $next_range if !ref($next_range); # error
+ ($beg, $end, $range_csv) = @$range_info = @$next_range;
+ # continue looping
+ }
+ }
+}
+
+sub fetch_uid { # long_response
+ my ($self, $tag, $uids, $range_info, $ops) = @_;
+ if (defined(my $err = refill_uids($self, $uids, $range_info))) {
+ $err ||= 'OK Fetch done';
+ $self->write("$tag $err\r\n");
+ return;
+ }
+ my $adj = $self->{uid_base} + 1;
+ my $uo2m = uo2m_extend($self, $uids->[-1]);
+ $uo2m = [ unpack('S*', $uo2m) ] if !ref($uo2m);
+ my ($i, $k);
+ for (@$uids) {
+ $self->msg_more("* $uo2m->[$_ - $adj] FETCH (UID $_");
+ for ($i = 0; $i < @$ops;) {
+ $k = $ops->[$i++];
+ $ops->[$i++]->($self, $k);
+ }
+ $self->msg_more(")\r\n");
+ }
+ @$uids = ();
+ 1; # more
+}
+
+sub cmd_status ($$$;@) {
+ my ($self, $tag, $mailbox, @items) = @_;
+ return "$tag BAD no items\r\n" if !scalar(@items);
+ ($items[0] !~ s/\A\(//s || $items[-1] !~ s/\)\z//s) and
+ return "$tag BAD invalid args\r\n";
+ my ($ibx, $exists, $uidnext) = inbox_lookup($self, $mailbox);
+ return "$tag NO Mailbox doesn't exist: $mailbox\r\n" if !$ibx;
+ my @it;
+ for my $it (@items) {
+ $it = uc($it);
+ push @it, $it;
+ if ($it =~ /\A(?:MESSAGES|UNSEEN|RECENT)\z/) {
+ push @it, $exists;
+ } elsif ($it eq 'UIDNEXT') {
+ push @it, $uidnext;
+ } elsif ($it eq 'UIDVALIDITY') {
+ push @it, $ibx->{uidvalidity};
+ } else {
+ return "$tag BAD invalid item\r\n";
+ }
+ }
+ return "$tag BAD no items\r\n" if !@it;
+ "* STATUS $mailbox (".join(' ', @it).")\r\n" .
+ "$tag OK Status done\r\n";
+}
+
+my %patmap = ('*' => '.*', '%' => '[^\.]*');
+sub cmd_list ($$$$) {
+ my ($self, $tag, $refname, $wildcard) = @_;
+ my $l = $self->{imapd}->{mailboxlist};
+ if ($refname eq '' && $wildcard eq '') {
+ # request for hierarchy delimiter
+ $l = [ qq[* LIST (\\Noselect) "." ""\r\n] ];
+ } elsif ($refname ne '' || $wildcard ne '*') {
+ $wildcard =~ s!([^a-z0-9_])!$patmap{$1} // "\Q$1"!egi;
+ $l = [ grep(/ \Q$refname\E$wildcard\r\n\z/is, @$l) ];
+ }
+ \(join('', @$l, "$tag OK List done\r\n"));
+}
+
+sub cmd_lsub ($$$$) {
+ my (undef, $tag) = @_; # same args as cmd_list
+ "$tag OK Lsub done\r\n";
+}
+
+sub eml_index_offs_i { # PublicInbox::Eml::each_part callback
+ my ($p, $all) = @_;
+ my ($eml, undef, $idx) = @$p;
+ if ($idx && lc($eml->ct->{type}) eq 'multipart') {
+ $eml->{imap_bdy} = $eml->{bdy} // \'';
+ }
+ $all->{$idx} = $eml; # $idx => Eml
+}
+
+# prepares an index for BODY[$SECTION_IDX] fetches
+sub eml_body_idx ($$) {
+ my ($eml, $section_idx) = @_;
+ my $idx = $eml->{imap_all_parts} // do {
+ my $all = {};
+ $eml->each_part(\&eml_index_offs_i, $all, 0, 1);
+ # top-level of multipart, BODY[0] not allowed (nz-number)
+ delete $all->{0};
+ $eml->{imap_all_parts} = $all;
+ };
+ $idx->{$section_idx};
+}
+
+# BODY[($SECTION_IDX)?(.$SECTION_NAME)?]<$offset.$bytes>
+sub partial_body {
+ my ($eml, $section_idx, $section_name) = @_;
+ if (defined $section_idx) {
+ $eml = eml_body_idx($eml, $section_idx) or return;
+ }
+ if (defined $section_name) {
+ if ($section_name eq 'MIME') {
+ # RFC 3501 6.4.5 states:
+ # The MIME part specifier MUST be prefixed
+ # by one or more numeric part specifiers
+ return unless defined $section_idx;
+ return $eml->header_obj->as_string . "\r\n";
+ }
+ my $bdy = $eml->{bdy} // $eml->{imap_bdy} // \'';
+ $eml = PublicInbox::Eml->new($$bdy);
+ if ($section_name eq 'TEXT') {
+ return $eml->body_raw;
+ } elsif ($section_name eq 'HEADER') {
+ return $eml->header_obj->as_string . "\r\n";
+ } else {
+ die "BUG: bad section_name=$section_name";
+ }
+ }
+ ${$eml->{bdy} // $eml->{imap_bdy} // \''};
+}
+
+# similar to what's in PublicInbox::Eml::re_memo, but doesn't memoize
+# to avoid OOM with malicious users
+sub hdrs_regexp ($) {
+ my ($hdrs) = @_;
+ my $names = join('|', map { "\Q$_" } split(/[ \t]+/, $hdrs));
+ qr/^(?:$names):[ \t]*[^\n]*\r?\n # 1st line
+ # continuation lines:
+ (?:[^:\n]*?[ \t]+[^\n]*\r?\n)*
+ /ismx;
+}
+
+# BODY[($SECTION_IDX.)?HEADER.FIELDS.NOT ($HDRS)]<$offset.$bytes>
+sub partial_hdr_not {
+ my ($eml, $section_idx, $hdrs_re) = @_;
+ if (defined $section_idx) {
+ $eml = eml_body_idx($eml, $section_idx) or return;
+ }
+ my $str = $eml->header_obj->as_string;
+ $str =~ s/$hdrs_re//g;
+ $str =~ s/(?<!\r)\n/\r\n/sg;
+ $str .= "\r\n";
+}
+
+# BODY[($SECTION_IDX.)?HEADER.FIELDS ($HDRS)]<$offset.$bytes>
+sub partial_hdr_get {
+ my ($eml, $section_idx, $hdrs_re) = @_;
+ if (defined $section_idx) {
+ $eml = eml_body_idx($eml, $section_idx) or return;
+ }
+ my $str = $eml->header_obj->as_string;
+ $str = join('', ($str =~ m/($hdrs_re)/g));
+ $str =~ s/(?<!\r)\n/\r\n/sg;
+ $str .= "\r\n";
+}
+
+sub partial_prepare ($$$$) {
+ my ($need, $partial, $want, $att) = @_;
+
+ # recombine [ "BODY[1.HEADER.FIELDS", "(foo", "bar)]" ]
+ # back to: "BODY[1.HEADER.FIELDS (foo bar)]"
+ return unless $att =~ /\ABODY\[/s;
+ until (rindex($att, ']') >= 0) {
+ my $next = shift @$want or return;
+ $att .= ' ' . uc($next);
+ }
+ if ($att =~ /\ABODY\[([0-9]+(?:\.[0-9]+)*)? # 1 - section_idx
+ (?:\.(HEADER|MIME|TEXT))? # 2 - section_name
+ \](?:<([0-9]+)(?:\.([0-9]+))?>)?\z/sx) { # 3, 4
+ $partial->{$att} = [ \&partial_body, $1, $2, $3, $4 ];
+ $$need |= CRLF_BREF|EML_HDR|EML_BDY;
+ } elsif ($att =~ /\ABODY\[(?:([0-9]+(?:\.[0-9]+)*)\.)? # 1 - section_idx
+ (?:HEADER\.FIELDS(\.NOT)?)\x20 # 2
+ \(([A-Z0-9\-\x20]+)\) # 3 - hdrs
+ \](?:<([0-9]+)(?:\.([0-9]+))?>)?\z/sx) { # 4 5
+ my $tmp = $partial->{$att} = [ $2 ? \&partial_hdr_not
+ : \&partial_hdr_get,
+ $1, undef, $4, $5 ];
+ $tmp->[2] = hdrs_regexp($3);
+
+ # don't emit CRLF_HDR instruction, here, partial_hdr_*
+ # will do CRLF conversion with only the extracted result
+ # and not waste time converting lines we don't care about.
+ $$need |= EML_HDR;
} else {
- $self->write(\"\r\n$tag OK\r\n");
undef;
}
}
-sub cmd_uid_search ($$$;) {
- my ($self, $tag, $arg, @rest) = @_;
- my $ibx = $self->{ibx} or return "$tag BAD No mailbox selected\r\n";
- $arg = uc($arg);
- if ($arg eq 'ALL' && !@rest) {
- $self->msg_more('* SEARCH');
- my $num = 0;
- long_response($self, \&uid_search_all, $tag, $ibx, \$num);
- } elsif ($arg eq 'UID' && scalar(@rest) == 1) {
- if ($rest[0] =~ /\A([0-9]+):([0-9]+|\*)\z/s) {
- my ($beg, $end) = ($1, $2);
- $end = $ibx->mm->max if $end eq '*';
- $self->msg_more('* SEARCH');
- long_response($self, \&uid_search_uid_range,
- $tag, $ibx, \$beg, $end);
- } elsif ($rest[0] =~ /\A[0-9]+\z/s) {
- my $uid = $rest[0];
- $uid = $ibx->over->get_art($uid) ? " $uid" : '';
- "* SEARCH$uid\r\n$tag OK\r\n";
+sub partial_emit ($$$) {
+ my ($self, $partial, $eml) = @_;
+ for (@$partial) {
+ my ($k, $cb, @args) = @$_;
+ my ($offset, $len) = splice(@args, -2);
+ # $cb is partial_body|partial_hdr_get|partial_hdr_not
+ my $str = $cb->($eml, @args) // '';
+ if (defined $offset) {
+ if (defined $len) {
+ $str = substr($str, $offset, $len);
+ $k =~ s/\.$len>\z/>/ or warn
+"BUG: unable to remove `.$len>' from `$k'";
+ } else {
+ $str = substr($str, $offset);
+ $len = length($str);
+ }
+ } else {
+ $len = length($str);
+ }
+ $self->msg_more(" $k {$len}\r\n");
+ $self->msg_more($str);
+ }
+}
+
+sub fetch_compile ($) {
+ my ($want) = @_;
+ if ($want->[0] =~ s/\A\(//s) {
+ $want->[-1] =~ s/\)\z//s or return 'BAD no rparen';
+ }
+ my (%partial, %seen, @op);
+ my $need = 0;
+ while (defined(my $att = shift @$want)) {
+ $att = uc($att);
+ next if $att eq 'UID'; # always returned
+ $att =~ s/\ABODY\.PEEK\[/BODY\[/; # we're read-only
+ my $x = $FETCH_ATT{$att};
+ if ($x) {
+ while (my ($k, $fl_cb) = each %$x) {
+ next if $seen{$k}++;
+ $need |= $fl_cb->[0];
+ push @op, [ @$fl_cb, $k ];
+ }
+ } elsif (!partial_prepare(\$need, \%partial, $want, $att)) {
+ return "BAD param: $att";
+ }
+ }
+ my @r;
+
+ # stabilize partial order for consistency and ease-of-debugging:
+ if (scalar keys %partial) {
+ $need |= NEED_BLOB;
+ $r[2] = [ map { [ $_, @{$partial{$_}} ] } sort keys %partial ];
+ }
+
+ push @op, $OP_EML_NEW if ($need & (EML_HDR|EML_BDY));
+
+ # do we need CRLF conversion?
+ if ($need & CRLF_BREF) {
+ push @op, $OP_CRLF_BREF;
+ } elsif (my $crlf = ($need & (CRLF_HDR|CRLF_BDY))) {
+ if ($crlf == (CRLF_HDR|CRLF_BDY)) {
+ push @op, $OP_CRLF_BREF;
+ } elsif ($need & CRLF_HDR) {
+ push @op, $OP_CRLF_HDR;
} else {
- "$tag BAD\r\n";
+ push @op, $OP_CRLF_BDY;
}
+ }
+
+ $r[0] = $need & NEED_BLOB ? \&fetch_blob :
+ ($need & NEED_SMSG ? \&fetch_smsg : \&fetch_uid);
+
+ # r[1] = [ $key1, $cb1, $key2, $cb2, ... ]
+ use sort 'stable'; # makes output more consistent
+ $r[1] = [ map { ($_->[2], $_->[1]) } sort { $a->[0] <=> $b->[0] } @op ];
+ @r;
+}
+
+sub cmd_uid_fetch ($$$$;@) {
+ my ($self, $tag, $range_csv, @want) = @_;
+ my $ibx = $self->{ibx} or return "$tag BAD No mailbox selected\r\n";
+ my ($cb, $ops, $partial) = fetch_compile(\@want);
+ return "$tag $cb\r\n" unless $ops;
+
+ # cb is one of fetch_blob, fetch_smsg, fetch_uid
+ $range_csv = 'bad' if $range_csv !~ $valid_range;
+ my $range_info = range_step($self, \$range_csv);
+ return "$tag $range_info\r\n" if !ref($range_info);
+ uo2m_hibernate($self) if $cb == \&fetch_blob; # slow, save RAM
+ $self->long_response($cb, $tag, [], $range_info, $ops, $partial);
+}
+
+sub cmd_fetch ($$$$;@) {
+ my ($self, $tag, $range_csv, @want) = @_;
+ my $ibx = $self->{ibx} or return "$tag BAD No mailbox selected\r\n";
+ my ($cb, $ops, $partial) = fetch_compile(\@want);
+ return "$tag $cb\r\n" unless $ops;
+
+ # cb is one of fetch_blob, fetch_smsg, fetch_uid
+ $range_csv = 'bad' if $range_csv !~ $valid_range;
+ msn_to_uid_range(msn2uid($self), $range_csv);
+ my $range_info = range_step($self, \$range_csv);
+ return "$tag $range_info\r\n" if !ref($range_info);
+ uo2m_hibernate($self) if $cb == \&fetch_blob; # slow, save RAM
+ $self->long_response($cb, $tag, [], $range_info, $ops, $partial);
+}
+
+sub msn_convert ($$) {
+ my ($self, $uids) = @_;
+ my $adj = $self->{uid_base} + 1;
+ my $uo2m = uo2m_extend($self, $uids->[-1]);
+ $uo2m = [ unpack('S*', $uo2m) ] if !ref($uo2m);
+ $_ = $uo2m->[$_ - $adj] for @$uids;
+}
+
+sub search_uid_range { # long_response
+ my ($self, $tag, $sql, $range_info, $want_msn) = @_;
+ my $uids = [];
+ if (defined(my $err = refill_uids($self, $uids, $range_info, $sql))) {
+ $err ||= 'OK Search done';
+ $self->write("\r\n$tag $err\r\n");
+ return;
+ }
+ msn_convert($self, $uids) if $want_msn;
+ $self->msg_more(join(' ', '', @$uids));
+ 1; # more
+}
+
+sub parse_imap_query ($$) {
+ my ($self, $query) = @_;
+ my $q = PublicInbox::IMAPsearchqp::parse($self, $query);
+ if (ref($q)) {
+ my $max = $self->{ibx}->over(1)->max;
+ my $beg = 1;
+ uid_clamp($self, \$beg, \$max);
+ $q->{range_info} = [ $beg, $max ];
+ }
+ $q;
+}
+
+sub search_common {
+ my ($self, $tag, $query, $want_msn) = @_;
+ my $ibx = $self->{ibx} or return "$tag BAD No mailbox selected\r\n";
+ my $q = parse_imap_query($self, $query);
+ return "$tag $q\r\n" if !ref($q);
+ my ($sql, $range_info) = delete @$q{qw(sql range_info)};
+ if (!scalar(keys %$q)) { # overview.sqlite3
+ $self->msg_more('* SEARCH');
+ $self->long_response(\&search_uid_range,
+ $tag, $sql, $range_info, $want_msn);
+ } elsif ($q = $q->{xap}) {
+ my $srch = $self->{ibx}->isrch or
+ return "$tag BAD search not available for mailbox\r\n";
+ my $opt = {
+ relevance => -1,
+ limit => UID_SLICE,
+ uid_range => $range_info
+ };
+ my $mset = $srch->mset($q, $opt);
+ my $uids = $srch->mset_to_artnums($mset, $opt);
+ msn_convert($self, $uids) if scalar(@$uids) && $want_msn;
+ "* SEARCH @$uids\r\n$tag OK Search done\r\n";
} else {
- "$tag BAD\r\n";
+ "$tag BAD Error\r\n";
}
}
-sub args_ok ($$) { # duplicated from PublicInbox::NNTP
- my ($cb, $argc) = @_;
- my $tot = prototype $cb;
- my ($nreq, undef) = split(';', $tot);
- $nreq = ($nreq =~ tr/$//) - 1;
- $tot = ($tot =~ tr/$//) - 1;
- ($argc <= $tot && $argc >= $nreq);
+sub cmd_uid_search ($$$) {
+ my ($self, $tag, $query) = @_;
+ search_common($self, $tag, $query);
+}
+
+sub cmd_search ($$$;) {
+ my ($self, $tag, $query) = @_;
+ search_common($self, $tag, $query, 1);
}
# returns 1 if we can continue, 0 if not due to buffered writes or disconnect
sub process_line ($$) {
my ($self, $l) = @_;
- my ($tag, $req, @args) = split(/[ \t]+/, $l);
+
+ # TODO: IMAP allows literals for big requests to upload messages
+ # (which we don't support) but maybe some big search queries use it.
+ # RFC 3501 9 (2) doesn't permit TAB or multiple SP
+ my ($tag, $req, @args) = parse_line('[ \t]+', 0, $l);
+ pop(@args) if (@args && !defined($args[-1]));
if (@args && uc($req) eq 'UID') {
$req .= "_".(shift @args);
}
my $res = eval {
- if (my $cmd = $self->can('cmd_'.lc($req // ''))) {
- defined($self->{-idle_tag}) ?
- "$self->{-idle_tag} BAD expected DONE\r\n" :
- $cmd->($self, $tag, @args);
- } elsif (uc($tag // '') eq 'DONE' && !defined($req)) {
- cmd_done($self, $tag);
+ if (defined(my $idle_tag = $self->{-idle_tag})) {
+ (uc($tag // '') eq 'DONE' && !defined($req)) ?
+ idle_done($self, $tag) :
+ "$idle_tag BAD expected DONE\r\n";
+ } elsif (my $cmd = $self->can('cmd_'.lc($req // ''))) {
+ if ($cmd == \&cmd_uid_search || $cmd == \&cmd_search) {
+ # preserve user-supplied quotes for search
+ (undef, @args) = split(/ search /i, $l, 2);
+ }
+ $cmd->($self, $tag, @args);
} else { # this is weird
auth_challenge_ok($self) //
- "$tag BAD Error in IMAP command $req: ".
- "Unknown command\r\n";
+ ($tag // '*') .
+ ' BAD Error in IMAP command '.
+ ($req // '(???)').
+ ": Unknown command\r\n";
}
};
my $err = $@;
if ($err && $self->{sock}) {
$l =~ s/\r?\n//s;
err($self, 'error from: %s (%s)', $l, $err);
+ $tag //= '*';
$res = "$tag BAD program fault - command not performed\r\n";
}
return 0 unless defined $res;
$self->write($res);
}
-sub long_step {
- my ($self) = @_;
- # wbuf is unset or empty, here; {long} may add to it
- my ($fd, $cb, $t0, @args) = @{$self->{long_cb}};
- my $more = eval { $cb->($self, @args) };
- if ($@ || !$self->{sock}) { # something bad happened...
- delete $self->{long_cb};
- my $elapsed = now() - $t0;
- if ($@) {
- err($self,
- "%s during long response[$fd] - %0.6f",
- $@, $elapsed);
- }
- out($self, " deferred[$fd] aborted - %0.6f", $elapsed);
- $self->close;
- } elsif ($more) { # $self->{wbuf}:
- $self->update_idle_time;
-
- # COMPRESS users all share the same DEFLATE context.
- # Flush it here to ensure clients don't see
- # each other's data
- $self->zflush;
-
- # no recursion, schedule another call ASAP, but only after
- # all pending writes are done. autovivify wbuf:
- my $new_size = push(@{$self->{wbuf}}, \&long_step);
-
- # wbuf may be populated by $cb, no need to rearm if so:
- $self->requeue if $new_size == 1;
- } else { # all done!
- delete $self->{long_cb};
- my $elapsed = now() - $t0;
- my $fd = fileno($self->{sock});
- out($self, " deferred[$fd] done - %0.6f", $elapsed);
- my $wbuf = $self->{wbuf}; # do NOT autovivify
-
- $self->requeue unless $wbuf && @$wbuf;
- }
-}
-
sub err ($$;@) {
my ($self, $fmt, @args) = @_;
printf { $self->{imapd}->{err} } $fmt."\n", @args;
printf { $self->{imapd}->{out} } $fmt."\n", @args;
}
-sub long_response ($$;@) {
- my ($self, $cb, @args) = @_; # cb returns true if more, false if done
-
- my $sock = $self->{sock} or return;
- # make sure we disable reading during a long response,
- # clients should not be sending us stuff and making us do more
- # work while we are stream a response to them
- $self->{long_cb} = [ fileno($sock), $cb, now(), @args ];
- long_step($self); # kick off!
- undef;
-}
-
# callback used by PublicInbox::DS for any (e)poll (in/out/hup/err)
sub event_step {
my ($self) = @_;
- return unless $self->flush_write && $self->{sock};
+ return unless $self->flush_write && $self->{sock} && !$self->{long_cb};
- $self->update_idle_time;
# only read more requests if we've drained the write buffer,
# otherwise we can be buffering infinitely w/o backpressure
- my $rbuf = $self->{rbuf} // (\(my $x = ''));
- my $r = 1;
-
- if (index($$rbuf, "\n") < 0) {
- my $off = length($$rbuf);
- $r = $self->do_read($rbuf, LINE_MAX, $off) or return;
- }
- while ($r > 0 && $$rbuf =~ s/\A[ \t]*([^\n]*?)\r?\n//) {
- my $line = $1;
- return $self->close if $line =~ /[[:cntrl:]]/s;
- my $t0 = now();
- my $fd = fileno($self->{sock});
- $r = eval { process_line($self, $line) };
- my $pending = $self->{wbuf} ? ' pending' : '';
- out($self, "[$fd] %s - %0.6f$pending", $line, now() - $t0);
+ my $rbuf = $self->{rbuf} // \(my $x = '');
+ my $line = index($$rbuf, "\n");
+ while ($line < 0) {
+ if (length($$rbuf) >= LINE_MAX) {
+ $self->write(\"\* BAD request too long\r\n");
+ return $self->close;
+ }
+ $self->do_read($rbuf, LINE_MAX, length($$rbuf)) or
+ return uo2m_hibernate($self);
+ $line = index($$rbuf, "\n");
}
+ $line = substr($$rbuf, 0, $line + 1, '');
+ $line =~ s/\r?\n\z//s;
+ return $self->close if $line =~ /[[:cntrl:]]/s;
+ my $t0 = now();
+ my $fd = fileno($self->{sock});
+ my $r = eval { process_line($self, $line) };
+ my $pending = $self->{wbuf} ? ' pending' : '';
+ out($self, "[$fd] %s - %0.6f$pending - $r", $line, now() - $t0);
return $self->close if $r < 0;
- my $len = length($$rbuf);
- return $self->close if ($len >= LINE_MAX);
$self->rbuf_idle($rbuf);
- $self->update_idle_time;
# maybe there's more pipelined data, or we'll have
# to register it for socket-readiness notifications
- $self->requeue unless $self->{wbuf};
+ $self->requeue unless $pending;
}
sub compressed { undef }
-sub zflush {} # overridden by IMAPdeflate
-
# RFC 4978
sub cmd_compress ($$$) {
my ($self, $tag, $alg) = @_;
undef;
}
-# for graceful shutdown in PublicInbox::Daemon:
-sub busy {
- my ($self, $now) = @_;
- ($self->{rbuf} || $self->{wbuf} || $self->not_idle_long($now));
+sub busy { # for graceful shutdown in PublicInbox::Daemon:
+ my ($self) = @_;
+ if (defined($self->{-idle_tag})) {
+ $self->write(\"* BYE server shutting down\r\n");
+ return; # not busy anymore
+ }
+ defined($self->{rbuf}) || defined($self->{wbuf}) ||
+ !$self->write(\"* BYE server shutting down\r\n");
}
sub close {
my ($self) = @_;
if (my $ibx = delete $self->{ibx}) {
- if (my $sock = $self->{sock}) {;
- $ibx->unsubscribe_unlock(fileno($sock));
- }
+ stop_idle($self, $ibx);
}
$self->SUPER::close; # PublicInbox::DS::close
}
no warnings 'once';
*cmd_select = \&cmd_examine;
+package PublicInbox::IMAP_preauth;
+our @ISA = qw(PublicInbox::IMAP);
+
+sub logged_in { 0 }
+
1;