-# Copyright (C) 2018 all contributors <meta@public-inbox.org>
+# Copyright (C) 2018-2020 all contributors <meta@public-inbox.org>
# License: AGPL-3.0+ <https://www.gnu.org/licenses/agpl-3.0.txt>
# for XOVER, OVER in NNTP, and feeds/homepage/threads in PSGI
use warnings;
use DBI;
use DBD::SQLite;
-use PublicInbox::SearchMsg;
+use PublicInbox::Smsg;
use Compress::Zlib qw(uncompress);
+use constant DEFAULT_LIMIT => 1000;
sub dbh_new {
- my ($self) = @_;
- my $ro = ref($self) eq 'PublicInbox::Over';
+ my ($self, $rw) = @_;
my $f = $self->{filename};
- if (!$ro && !-f $f) { # SQLite defaults mode to 0644, we want 0666
+ if ($rw && !-f $f) { # SQLite defaults mode to 0644, we want 0666
open my $fh, '+>>', $f or die "failed to open $f: $!";
}
- my $dbh = DBI->connect("dbi:SQLite:dbname=$f",'','', {
- AutoCommit => 1,
- RaiseError => 1,
- PrintError => 0,
- ReadOnly => $ro,
- sqlite_use_immediate_transaction => 1,
- });
+ my (@st, $st, $dbh);
+ my $tries = 0;
+ do {
+ @st = stat($f) or die "failed to stat $f: $!";
+ $st = pack('dd', $st[0], $st[1]); # 0: dev, 1: inode
+ $dbh = DBI->connect("dbi:SQLite:dbname=$f",'','', {
+ AutoCommit => 1,
+ RaiseError => 1,
+ PrintError => 0,
+ ReadOnly => !$rw,
+ sqlite_use_immediate_transaction => 1,
+ });
+ $self->{st} = $st;
+ @st = stat($f) or die "failed to stat $f: $!";
+ $st = pack('dd', $st[0], $st[1]);
+ } while ($st ne $self->{st} && $tries++ < 3);
+ warn "W: $f: .st_dev, .st_ino unstable\n" if $st ne $self->{st};
$dbh->{sqlite_unicode} = 1;
$dbh;
}
sub connect { $_[0]->{dbh} ||= $_[0]->dbh_new }
-sub load_from_row {
- my ($smsg) = @_;
- bless $smsg, 'PublicInbox::SearchMsg';
+sub load_from_row ($;$) {
+ my ($smsg, $cull) = @_;
+ bless $smsg, 'PublicInbox::Smsg';
if (defined(my $data = delete $smsg->{ddd})) {
$data = uncompress($data);
utf8::decode($data);
- $smsg->load_from_data($data);
+ PublicInbox::Smsg::load_from_data($smsg, $data);
+
+ # saves over 600K for 1000+ message threads
+ PublicInbox::Smsg::psgi_cull($smsg) if $cull;
}
$smsg
}
sub do_get {
my ($self, $sql, $opts, @args) = @_;
my $dbh = $self->connect;
- my $lim = (($opts->{limit} || 0) + 0) || 1000;
+ my $lim = (($opts->{limit} || 0) + 0) || DEFAULT_LIMIT;
$sql .= "LIMIT $lim";
my $msgs = $dbh->selectall_arrayref($sql, { Slice => {} }, @args);
- load_from_row($_) for @$msgs;
+ my $cull = $opts->{cull};
+ load_from_row($_, $cull) for @$msgs;
$msgs
}
sub get_thread {
my ($self, $mid, $prev) = @_;
my $dbh = $self->connect;
+ my $opts = { cull => 1 };
my $id = $dbh->selectrow_array(<<'', undef, $mid);
SELECT id FROM msgid WHERE mid = ? LIMIT 1
SELECT tid,sid FROM over WHERE num = ? LIMIT 1
defined $tid or return nothing; # $sid may be undef
+
+ my $cond_all = '(tid = ? OR sid = ?) AND num > ?';
my $sort_col = 'ds';
$num = 0;
- if ($prev) {
+ if ($prev) { # mboxrd stream, only
$num = $prev->{num} || 0;
$sort_col = 'num';
}
- my $cond = '(tid = ? OR sid = ?) AND num > ?';
- my $msgs = do_get($self, <<"", {}, $tid, $sid, $num);
-SELECT num,ts,ds,ddd FROM over WHERE $cond ORDER BY $sort_col ASC
- return $msgs unless wantarray;
+ my $cols = 'num,ts,ds,ddd';
+ unless (wantarray) {
+ return do_get($self, <<"", $opts, $tid, $sid, $num);
+SELECT $cols FROM over WHERE $cond_all
+ORDER BY $sort_col ASC
- my $nr = $dbh->selectrow_array(<<"", undef, $tid, $sid, $num);
-SELECT COUNT(num) FROM over WHERE $cond
+ }
+ # HTML view always wants an array and never uses $prev,
+ # but the mbox stream never wants an array and always has $prev
+ die '$prev not supported with wantarray' if $prev;
+ my $nr = $dbh->selectrow_array(<<"", undef, $tid, $sid, $num);
+SELECT COUNT(num) FROM over WHERE $cond_all
+
+ # giant thread, prioritize strict (tid) matches and throw
+ # in the loose (sid) matches at the end
+ my $msgs = do_get($self, <<"", $opts, $tid, $num);
+SELECT $cols FROM over WHERE tid = ? AND num > ?
+ORDER BY $sort_col ASC
+
+ # do we have room for loose matches? get the most recent ones, first:
+ my $lim = DEFAULT_LIMIT - scalar(@$msgs);
+ if ($lim > 0) {
+ $opts->{limit} = $lim;
+ my $loose = do_get($self, <<"", $opts, $tid, $sid, $num);
+SELECT $cols FROM over WHERE tid != ? AND sid = ? AND num > ?
+ORDER BY $sort_col DESC
+
+ # TODO separate strict and loose matches here once --reindex
+ # is fixed to preserve `tid' properly
+ push @$msgs, @$loose;
+ }
($nr, $msgs);
}
sub get_art {
my ($self, $num) = @_;
my $dbh = $self->connect;
- my $smsg = $dbh->selectrow_hashref(<<'', undef, $num);
+ my $sth = $dbh->prepare_cached(<<'', undef, 1);
SELECT num,ds,ts,ddd FROM over WHERE num = ? LIMIT 1
- return load_from_row($smsg) if $smsg;
- undef;
+ $sth->execute($num);
+ my $smsg = $sth->fetchrow_hashref;
+ $smsg ? load_from_row($smsg) : undef;
}
sub next_by_mid {
load_from_row($smsg);
}
+# IMAP search, this is limited by callers to UID_SLICE size (50K)
+sub uid_range {
+ my ($self, $beg, $end, $sql) = @_;
+ my $dbh = $self->connect;
+ my $q = 'SELECT num FROM over WHERE num >= ? AND num <= ?';
+
+ # This is read-only, anyways; but caller should verify it's
+ # only sending \A[0-9]+\z for ds and ts column ranges
+ $q .= $$sql if $sql;
+ $q .= ' ORDER BY num ASC';
+ $dbh->selectcol_arrayref($q, undef, $beg, $end);
+}
+
+sub max {
+ my ($self) = @_;
+ my $sth = $self->connect->prepare_cached(<<'', undef, 1);
+SELECT MAX(num) FROM over WHERE num > 0
+
+ $sth->execute;
+ $sth->fetchrow_array // 0;
+}
+
+sub imap_status {
+ my ($self, $uid_base, $uid_end) = @_;
+ my $dbh = $self->connect;
+ my $sth = $dbh->prepare_cached(<<'', undef, 1);
+SELECT COUNT(num) FROM over WHERE num > ? AND num <= ?
+
+ $sth->execute($uid_base, $uid_end);
+ my $exists = $sth->fetchrow_array;
+
+ $sth = $dbh->prepare_cached(<<'', undef, 1);
+SELECT MAX(num) + 1 FROM over WHERE num <= ?
+
+ $sth->execute($uid_end);
+ my $uidnext = $sth->fetchrow_array;
+
+ $sth = $dbh->prepare_cached(<<'', undef, 1);
+SELECT MAX(num) FROM over WHERE num > 0
+
+ ($exists, $uidnext, $sth->fetchrow_array // 0);
+}
+
+sub check_inodes {
+ my ($self) = @_;
+ if (my @st = stat($self->{filename})) { # did st_dev, st_ino change?
+ my $st = pack('dd', $st[0], $st[1]);
+
+ # don't actually reopen, just let {dbh} be recreated later
+ delete($self->{dbh}) if ($st ne ($self->{st} // $st));
+ } else {
+ warn "W: stat $self->{filename}: $!\n";
+ }
+}
+
1;