1 # Copyright (C) 2021 all contributors <meta@public-inbox.org>
2 # License: AGPL-3.0+ <https://www.gnu.org/licenses/agpl-3.0.txt>
4 # common reader code for IMAP and NNTP (and maybe JMAP)
5 package PublicInbox::NetReader;
8 use parent qw(Exporter PublicInbox::IPC);
10 use PublicInbox::Config;
11 our %IMAPflags2kw = map {; "\\\u$_" => $_ } qw(seen answered flagged draft);
12 $IMAPflags2kw{'$Forwarded'} = 'forwarded'; # RFC 5550
14 our @EXPORT = qw(uri_section imap_uri nntp_uri);
18 Data::Dumper->new(\@_)->Useqq(1)->Terse(1)->Dump;
21 # returns the git config section name, e.g [imap "imaps://user@example.com"]
22 # without the mailbox, so we can share connections between different inboxes
25 $uri->scheme . '://' . $uri->authority;
30 return if ($val // '') eq '';
31 if ($val =~ m!\Asocks5h:// (?: \[ ([^\]]+) \] | ([^:/]+) )
32 (?::([0-9]+))?/*\z!ix) {
33 my ($h, $p) = ($1 // $2, $3 + 0);
34 $h = '127.0.0.1' if $h eq '0';
35 eval { require IO::Socket::Socks } or die <<EOM;
36 IO::Socket::Socks missing for socks5h://$h:$p
38 return { ProxyAddr => $h, ProxyPort => $p };
40 die "$val not understood (only socks5h:// is supported)\n";
44 my ($self, $mic_arg, $sec, $uri) = @_;
46 my $sa = $self->{imap_opt}->{$sec}->{-proxy_cfg} || $self->{-proxy_cli};
49 $opt{ConnectAddr} = delete $mic_arg->{Server};
50 $opt{ConnectPort} = delete $mic_arg->{Port};
51 $socks{Socket} = IO::Socket::Socks->new(%opt) or die
52 "E: <$$uri> ".eval('$IO::Socket::Socks::SOCKS_ERROR');
54 PublicInbox::IMAPClient->new(%$mic_arg, %socks);
57 sub auth_anon_cb { '' }; # for Mail::IMAPClient::Authcallback
59 # mic_for may prompt the user and store auth info, prepares mic_get
60 sub mic_for ($$$$) { # mic = Mail::IMAPClient
61 my ($self, $uri, $mic_args, $lei) = @_;
62 require PublicInbox::GitCredential;
65 protocol => $uri->scheme,
67 username => $uri->user,
68 password => $uri->password,
69 }, 'PublicInbox::GitCredential';
70 my $sec = uri_section($uri);
71 my $common = $mic_args->{$sec} // {};
72 # IMAPClient and Net::Netrc both mishandles `0', so we pass `127.0.0.1'
73 my $host = $cred->{host};
74 $host = '127.0.0.1' if $host eq '0';
78 Ssl => $uri->scheme eq 'imaps',
79 Keepalive => 1, # SO_KEEPALIVE
80 %$common, # may set Starttls, Compress, Debug ....
82 require PublicInbox::IMAPClient;
83 my $mic = mic_new($self, $mic_arg, $sec, $uri) or
84 die "E: <$uri> new: $@\n";
85 # default to using STARTTLS if it's available, but allow
86 # it to be disabled since I usually connect to localhost
87 if (!$mic_arg->{Ssl} && !defined($mic_arg->{Starttls}) &&
88 $mic->has_capability('STARTTLS') &&
89 $mic->can('starttls')) {
90 $mic->starttls or die "E: <$uri> STARTTLS: $@\n";
93 # do we even need credentials?
94 if (!defined($cred->{username}) &&
95 $mic->has_capability('AUTH=ANONYMOUS')) {
99 $cred->check_netrc unless defined $cred->{password};
100 $cred->fill($lei); # may prompt user here
101 $mic->User($mic_arg->{User} = $cred->{username});
102 $mic->Password($mic_arg->{Password} = $cred->{password});
103 } else { # AUTH=ANONYMOUS
104 $mic->Authmechanism($mic_arg->{Authmechanism} = 'ANONYMOUS');
105 $mic_arg->{Authcallback} = 'auth_anon_cb';
106 $mic->Authcallback(\&auth_anon_cb);
109 if ($mic->login && $mic->IsAuthenticated) {
110 # success! keep IMAPClient->new arg in case we get disconnected
111 $self->{mic_arg}->{$sec} = $mic_arg;
113 $uri->user($cred->{username}) if !defined($uri->user);
114 } elsif ($mic_arg->{Authmechanism} eq 'ANONYMOUS') {
115 $uri->auth('ANONYMOUS') if !defined($uri->auth);
118 $err = "E: <$uri> LOGIN: $@\n";
119 if ($cred && defined($cred->{password})) {
120 $err =~ s/\Q$cred->{password}\E/*******/g;
124 $cred->run($mic ? 'approve' : 'reject') if $cred;
126 $lei ? $lei->fail($err) : warn($err);
131 # Net::NNTP doesn't support CAPABILITIES, yet
132 sub try_starttls ($) {
134 return if $host =~ /\.onion\z/s;
135 return if $host =~ /\A127\.[0-9]+\.[0-9]+\.[0-9]+\z/s;
136 return if $host eq '::1';
141 my ($nn_arg, $nntp_opt, $uri) = @_;
143 if (defined $nn_arg->{ProxyAddr}) {
144 require PublicInbox::NetNNTPSocks;
145 eval { $nn = PublicInbox::NetNNTPSocks->new_socks(%$nn_arg) };
146 die "E: <$uri> $@\n" if $@;
148 $nn = Net::NNTP->new(%$nn_arg) or die "E: <$uri> new: $!\n";
151 # default to using STARTTLS if it's available, but allow
152 # it to be disabled for localhost/VPN users
153 if (!$nn_arg->{SSL} && $nn->can('starttls')) {
154 if (!defined($nntp_opt->{starttls}) &&
155 try_starttls($nn_arg->{Host})) {
156 # soft fail by default
157 $nn->starttls or warn <<"";
158 W: <$uri> STARTTLS tried and failed (not requested)
160 } elsif ($nntp_opt->{starttls}) {
161 # hard fail if explicitly configured
162 $nn->starttls or die <<"";
163 E: <$uri> STARTTLS requested and failed
166 } elsif ($nntp_opt->{starttls}) {
167 $nn->can('starttls') or
168 die "E: <$uri> Net::NNTP too old for STARTTLS\n";
169 $nn->starttls or die <<"";
170 E: <$uri> STARTTLS requested and failed
176 sub nn_for ($$$$) { # nn = Net::NNTP
177 my ($self, $uri, $nn_args, $lei) = @_;
178 my $sec = uri_section($uri);
179 my $nntp_opt = $self->{nntp_opt}->{$sec} //= {};
180 my $host = $uri->host;
181 # Net::NNTP and Net::Netrc both mishandle `0', so we pass `127.0.0.1'
182 $host = '127.0.0.1' if $host eq '0';
185 if (defined(my $ui = $uri->userinfo)) {
186 require PublicInbox::GitCredential;
189 protocol => $uri->scheme,
191 }, 'PublicInbox::GitCredential';
192 ($u, $p) = split(/:/, $ui, 2);
193 ($cred->{username}, $cred->{password}) = ($u, $p);
194 $cred->check_netrc unless defined $p;
196 my $common = $nn_args->{$sec} // {};
200 SSL => $uri->secure, # snews == nntps
201 %$common, # may Debug ....
203 my $sa = $self->{-proxy_cli};
204 %$nn_arg = (%$nn_arg, %$sa) if $sa;
205 my $nn = nn_new($nn_arg, $nntp_opt, $uri);
207 $cred->fill($lei); # may prompt user here
208 if ($nn->authinfo($u, $p)) {
209 push @{$nntp_opt->{-postconn}}, [ 'authinfo', $u, $p ];
211 warn "E: <$uri> AUTHINFO $u XXXX failed\n";
216 if ($nntp_opt->{compress}) {
217 # https://rt.cpan.org/Ticket/Display.html?id=129967
218 if ($nn->can('compress')) {
220 push @{$nntp_opt->{-postconn}}, [ 'compress' ];
222 warn "W: <$uri> COMPRESS failed\n";
225 delete $nntp_opt->{compress};
227 W: <$uri> COMPRESS not supported by Net::NNTP
228 W: see https://rt.cpan.org/Ticket/Display.html?id=129967 for updates
233 $self->{nn_arg}->{$sec} = $nn_arg;
234 $cred->run($nn ? 'approve' : 'reject') if $cred;
240 require PublicInbox::URIimap;
241 my $uri = PublicInbox::URIimap->new($url);
242 $uri ? $uri->canonical : undef;
245 my %IS_NNTP = (news => 1, snews => 1, nntp => 1, nntps => 1);
248 require PublicInbox::URInntps;
249 my $uri = PublicInbox::URInntps->new($url);
250 $uri && $IS_NNTP{$uri->scheme} && $uri->group ? $uri->canonical : undef;
253 sub cfg_intvl ($$$) {
254 my ($cfg, $key, $url) = @_;
255 my $v = $cfg->urlmatch($key, $url) // return;
256 $v =~ /\A[0-9]+(?:\.[0-9]+)?\z/s and return $v + 0;
257 if (ref($v) eq 'ARRAY') {
258 $v = join(', ', @$v);
259 warn "W: $key has multiple values: $v\nW: $key ignored\n";
261 warn "W: $key=$v is not a numeric value in seconds\n";
266 my ($cfg, $key, $url) = @_;
267 my $orig = $cfg->urlmatch($key, $url) // return;
268 my $bool = $cfg->git_bool($orig);
269 warn "W: $key=$orig for $url is not boolean\n" unless defined($bool);
273 # flesh out common IMAP-specific data structures
274 sub imap_common_init ($;$) {
275 my ($self, $lei) = @_;
276 return unless $self->{imap_order};
277 $self->{quiet} = 1 if $lei && $lei->{opt}->{quiet};
278 eval { require PublicInbox::IMAPClient } or
279 die "Mail::IMAPClient is required for IMAP:\n$@\n";
280 ($lei || eval { require PublicInbox::IMAPTracker }) or
281 die "DBD::SQLite is required for IMAP\n:$@\n";
282 require PublicInbox::URIimap;
283 my $cfg = $self->{pi_cfg} // $lei->_lei_cfg;
284 my $mic_args = {}; # scheme://authority => Mail:IMAPClient arg
285 for my $uri (@{$self->{imap_order}}) {
286 my $sec = uri_section($uri);
287 for my $k (qw(Starttls Debug Compress)) {
288 my $bool = cfg_bool($cfg, "imap.$k", $$uri) // next;
289 $mic_args->{$sec}->{$k} = $bool;
291 my $to = cfg_intvl($cfg, 'imap.timeout', $$uri);
292 $mic_args->{$sec}->{Timeout} = $to if $to;
293 my $sa = socks_args($cfg->urlmatch('imap.Proxy', $$uri));
294 $self->{imap_opt}->{$sec}->{-proxy_cfg} = $sa if $sa;
295 for my $k (qw(pollInterval idleInterval)) {
296 $to = cfg_intvl($cfg, "imap.$k", $$uri) // next;
297 $self->{imap_opt}->{$sec}->{$k} = $to;
299 my $k = 'imap.fetchBatchSize';
300 my $bs = $cfg->urlmatch($k, $$uri) // next;
301 if ($bs =~ /\A([0-9]+)\z/) {
302 $self->{imap_opt}->{$sec}->{batch_size} = $bs;
304 warn "$k=$bs is not an integer\n";
307 # make sure we can connect and cache the credentials in memory
308 $self->{mic_arg} = {}; # schema://authority => IMAPClient->new args
309 my $mics = {}; # schema://authority => IMAPClient obj
310 for my $orig_uri (@{$self->{imap_order}}) {
311 my $sec = uri_section($orig_uri);
312 my $uri = PublicInbox::URIimap->new("$sec/");
313 my $mic = $mics->{$sec} //=
314 mic_for($self, $uri, $mic_args, $lei) //
315 die "Unable to continue\n";
316 next unless $self->isa('PublicInbox::NetWriter');
317 my $dst = $orig_uri->mailbox // next;
318 next if $mic->exists($dst); # already exists
319 $mic->create($dst) or die "CREATE $dst failed <$orig_uri>: $@";
324 # flesh out common NNTP-specific data structures
325 sub nntp_common_init ($;$) {
326 my ($self, $lei) = @_;
327 return unless $self->{nntp_order};
328 $self->{quiet} = 1 if $lei && $lei->{opt}->{quiet};
329 eval { require Net::NNTP } or
330 die "Net::NNTP is required for NNTP:\n$@\n";
331 ($lei || eval { require PublicInbox::IMAPTracker }) or
332 die "DBD::SQLite is required for NNTP\n:$@\n";
333 my $cfg = $self->{pi_cfg} // $lei->_lei_cfg;
334 my $nn_args = {}; # scheme://authority => Net::NNTP->new arg
335 for my $uri (@{$self->{nntp_order}}) {
336 my $sec = uri_section($uri);
337 my $args = $nn_args->{$sec} //= {};
339 # Debug and Timeout are passed to Net::NNTP->new
340 my $v = cfg_bool($cfg, 'nntp.Debug', $$uri);
341 $args->{Debug} = $v if defined $v;
342 my $to = cfg_intvl($cfg, 'nntp.Timeout', $$uri);
343 $args->{Timeout} = $to if $to;
344 my $sa = socks_args($cfg->urlmatch('nntp.Proxy', $$uri));
345 %$args = (%$args, %$sa) if $sa;
347 # Net::NNTP post-connect commands
348 for my $k (qw(starttls compress)) {
349 $v = cfg_bool($cfg, "nntp.$k", $$uri) // next;
350 $self->{nntp_opt}->{$sec}->{$k} = $v;
353 # -watch internal option
354 for my $k (qw(pollInterval)) {
355 $to = cfg_intvl($cfg, "nntp.$k", $$uri) // next;
356 $self->{nntp_opt}->{$sec}->{$k} = $to;
359 # make sure we can connect and cache the credentials in memory
360 $self->{nn_arg} = {}; # schema://authority => Net::NNTP->new args
361 my %nn; # schema://authority => Net::NNTP object
362 for my $uri (@{$self->{nntp_order}}) {
363 my $sec = uri_section($uri);
364 $nn{$sec} //= nn_for($self, $uri, $nn_args, $lei);
366 \%nn; # for optional {nn_cached}
370 my ($self, $arg) = @_;
372 if ($uri = imap_uri($arg)) {
373 push @{$self->{imap_order}}, $uri;
374 } elsif ($uri = nntp_uri($arg)) {
375 push @{$self->{nntp_order}}, $uri;
377 push @{$self->{unsupported_url}}, $arg;
382 my ($self, $lei) = @_;
383 if (my $u = $self->{unsupported_url}) {
384 return "Unsupported URL(s): @$u";
386 if ($self->{imap_order}) {
387 eval { require PublicInbox::IMAPClient } or
388 die "Mail::IMAPClient is required for IMAP:\n$@\n";
390 if ($self->{nntp_order}) {
391 eval { require Net::NNTP } or
392 die "Net::NNTP is required for NNTP:\n$@\n";
394 my $sa = socks_args($lei ? $lei->{opt}->{proxy} : undef);
395 $self->{-proxy_cli} = $sa if $sa;
399 sub flags2kw ($$$$) {
400 my ($self, $uri, $uid, $flags) = @_;
402 for my $f (split(/ /, $flags)) {
403 if (my $k = $IMAPflags2kw{$f}) {
405 } elsif ($f eq "\\Recent") { # not in JMAP
406 } elsif ($f eq "\\Deleted") { # not in JMAP
408 } elsif ($self->{verbose}) {
409 warn "# unknown IMAP flag $f <$uri/;UID=$uid>\n";
412 @$kw = sort @$kw; # for LeiSearch->kw_changed and UI/UX purposes
416 sub _imap_do_msg ($$$$$) {
417 my ($self, $uri, $uid, $raw, $flags) = @_;
418 # our target audience expects LF-only, save storage
419 $$raw =~ s/\r\n/\n/sg;
420 my $kw = flags2kw($self, $uri, $uid, $flags) // return;
421 my ($eml_cb, @args) = @{$self->{eml_each}};
422 $eml_cb->($uri, $uid, $kw, PublicInbox::Eml->new($raw), @args);
425 sub run_commit_cb ($) {
427 my $cmt_cb_args = $self->{on_commit} or return;
428 my ($cb, @args) = @$cmt_cb_args;
432 sub itrk_last ($$;$$) {
433 my ($self, $uri, $r_uidval, $mic) = @_;
434 return (undef, undef, $r_uidval) unless $self->{incremental};
435 my ($itrk, $l_uid, $l_uidval);
436 if (defined(my $lms = $self->{-lms_ro})) { # LeiMailSync or 0
437 $uri->uidvalidity($r_uidval) if defined $r_uidval;
439 my $auth = $mic->Authmechanism // '';
440 $uri->auth($auth) if $auth eq 'ANONYMOUS';
441 my $user = $mic->User;
442 $uri->user($user) if defined($user);
445 $l_uid = ($lms && ($x = $lms->location_stats($$uri))) ?
446 $x->{'uid.max'} : undef;
447 # itrk remains undef, lei/store worker writes to
450 $itrk = PublicInbox::IMAPTracker->new($$uri);
451 ($l_uidval, $l_uid) = $itrk->get_last($$uri);
453 ($itrk, $l_uid, $l_uidval //= $r_uidval);
456 # import flags of already-seen messages
457 sub each_old_flags ($$$$) {
458 my ($self, $mic, $uri, $l_uid) = @_;
460 my $sec = uri_section($uri);
461 my $bs = $self->{imap_opt}->{$sec}->{batch_size} // 10000;
462 my ($eml_cb, @args) = @{$self->{eml_each}};
463 for (my $n = 1; $n <= $l_uid; $n += $bs) {
465 $end = $l_uid if $end > $l_uid;
466 my $r = $mic->fetch_hash("$n:$end", 'FLAGS');
468 return if $!{EINTR} && $self->{quit};
469 return "E: $uri UID FETCH $n:$end error: $!";
471 while (my ($uid, $per_uid) = each %$r) {
472 my $kw = flags2kw($self, $uri, $uid, $per_uid->{FLAGS})
474 # LeiImport->input_net_cb
475 $eml_cb->($uri, $uid, $kw, undef, @args);
480 # returns true if PERMANENTFLAGS indicates FLAGS of already imported
481 # messages are meaningful
484 return if !defined($perm_fl);
485 for my $f (split(/[ \t]+/, $perm_fl)) {
486 return 1 if $IMAPflags2kw{$f};
491 sub _imap_fetch_all ($$$) {
492 my ($self, $mic, $orig_uri) = @_;
493 my $sec = uri_section($orig_uri);
494 my $mbx = $orig_uri->mailbox;
495 $mic->Clear(1); # trim results history
497 # we need to check for mailbox writability to see if we care about
498 # FLAGS from already-imported messages.
499 my $cmd = $self->{each_old} ? 'select' : 'examine';
500 $mic->$cmd($mbx) or return "E: \U$cmd\E $mbx ($sec) failed: $!";
502 my ($r_uidval, $r_uidnext, $perm_fl);
503 for ($mic->Results) {
504 /^\* OK \[PERMANENTFLAGS \(([^\)]*)\)\].*/ and $perm_fl = $1;
505 /^\* OK \[UIDVALIDITY ([0-9]+)\].*/ and $r_uidval = $1;
506 /^\* OK \[UIDNEXT ([0-9]+)\].*/ and $r_uidnext = $1;
508 $r_uidval //= $mic->uidvalidity($mbx) //
509 return "E: $orig_uri cannot get UIDVALIDITY";
510 $r_uidnext //= $mic->uidnext($mbx) //
511 return "E: $orig_uri cannot get UIDNEXT";
512 my $expect = $orig_uri->uidvalidity // $r_uidval;
513 return <<EOF if $expect != $r_uidval;
514 E: $orig_uri UIDVALIDITY mismatch (got $r_uidval)
517 my $uri = $orig_uri->clone;
518 my $single_uid = $uri->uid;
519 my ($itrk, $l_uid, $l_uidval) = itrk_last($self, $uri, $r_uidval, $mic);
520 if (defined($single_uid)) {
521 $itrk = $l_uid = undef;
522 $uri->uid(undef); # for eml_cb
524 return <<EOF if $l_uidval != $r_uidval;
525 E: $uri UIDVALIDITY mismatch
526 E: local=$l_uidval != remote=$r_uidval
528 $uri->uidvalidity($r_uidval);
530 my $r_uid = $r_uidnext - 1;
531 return <<EOF if $l_uid > $r_uid;
532 E: $uri local UID exceeds remote ($l_uid > $r_uid)
533 E: $uri strangely, UIDVALIDLITY matches ($l_uidval)
535 $mic->Uid(1); # the default, we hope
537 if (!defined($single_uid) && $self->{each_old} &&
538 perm_fl_ok($perm_fl)) {
539 $err = each_old_flags($self, $mic, $uri, $l_uid);
542 return if $l_uid >= $r_uid; # nothing to do
544 my ($mod, $shard) = @{$self->{shard_info} // []};
545 unless ($self->{quiet}) {
546 my $m = $mod ? " [(UID % $mod) == $shard]" : '';
547 warn "# $uri fetching UID $l_uid:$r_uid$m\n";
549 my $bs = $self->{imap_opt}->{$sec}->{batch_size} // 1;
550 my $req = $mic->imap4rev1 ? 'BODY.PEEK[]' : 'RFC822.PEEK';
555 # I wish "UID FETCH $START:*" could work, but:
556 # 1) servers do not need to return results in any order
557 # 2) Mail::IMAPClient doesn't offer a streaming API
558 if (defined $single_uid) {
559 $uids = [ $single_uid ];
560 } elsif (!($uids = $mic->search("UID $l_uid:*"))) {
561 return if $!{EINTR} && $self->{quit};
562 return "E: $uri UID SEARCH $l_uid:* error: $!";
564 return if scalar(@$uids) == 0;
566 # RFC 3501 doesn't seem to indicate order of UID SEARCH
567 # responses, so sort it ourselves. Order matters so
568 # IMAPTracker can store the newest UID.
569 @$uids = sort { $a <=> $b } @$uids;
571 # Did we actually get new messages?
572 return if $uids->[0] < $l_uid;
574 $l_uid = $uids->[-1] + 1; # for next search
576 my $n = $self->{max_batch};
578 @$uids = grep { ($_ % $mod) == $shard } @$uids if $mod;
579 while (scalar @$uids) {
580 my @batch = splice(@$uids, 0, $bs);
581 $batch = join(',', @batch);
582 local $0 = "UID:$batch $mbx $sec";
583 my $r = $mic->fetch_hash($batch, $req, 'FLAGS');
584 unless ($r) { # network error?
585 last if $!{EINTR} && $self->{quit};
586 $err = "E: $uri UID FETCH $batch error: $!";
589 for my $uid (@batch) {
590 # messages get deleted, so holes appear
591 my $per_uid = delete $r->{$uid} // next;
592 my $raw = delete($per_uid->{$key}) // next;
593 _imap_do_msg($self, $uri, $uid, \$raw,
596 last if $self->{quit};
598 last if $self->{quit};
600 run_commit_cb($self);
601 $itrk->update_last($r_uidval, $last_uid) if $itrk;
602 } until ($err || $self->{quit} || defined($single_uid));
606 # uses cached auth info prepared by mic_for
608 my ($self, $uri) = @_;
609 my $sec = uri_section($uri);
610 # see if caller saved result of imap_common_init
611 my $cached = $self->{mics_cached};
613 my $mic = $cached->{$sec};
614 return $mic if $mic && $mic->IsConnected;
615 delete $cached->{$sec};
617 my $mic_arg = $self->{mic_arg}->{$sec} or
618 die "BUG: no Mail::IMAPClient->new arg for $sec";
619 if (defined(my $cb_name = $mic_arg->{Authcallback})) {
620 if (ref($cb_name) ne 'CODE') {
621 $mic_arg->{Authcallback} = $self->can($cb_name);
624 my $mic = mic_new($self, $mic_arg, $sec, $uri);
625 $cached //= {}; # invalid placeholder if no cache enabled
626 $mic && $mic->IsConnected ? ($cached->{$sec} = $mic) : undef;
630 my ($self, $url, $eml_cb, @args) = @_;
631 my $uri = ref($url) ? $url : PublicInbox::URIimap->new($url);
632 my $sec = uri_section($uri);
633 local $0 = $uri->mailbox." $sec";
634 my $mic = mic_get($self, $uri);
637 local $self->{eml_each} = [ $eml_cb, @args ];
638 $err = _imap_fetch_all($self, $mic, $uri);
640 $err = "E: <$uri> not connected: $!";
642 die $err if $err && $self->{-can_die};
647 # may used cached auth info prepared by nn_for once
649 my ($self, $uri) = @_;
650 my $sec = uri_section($uri);
651 # see if caller saved result of nntp_common_init
652 my $cached = $self->{nn_cached} // {};
654 $nn = delete($cached->{$sec}) and return $nn;
655 my $nn_arg = $self->{nn_arg}->{$sec} or
656 die "BUG: no Net::NNTP->new arg for $sec";
657 my $nntp_opt = $self->{nntp_opt}->{$sec};
658 $nn = nn_new($nn_arg, $nntp_opt, $uri) or return;
659 if (my $postconn = $nntp_opt->{-postconn}) {
660 for my $m_arg (@$postconn) {
661 my ($method, @args) = @$m_arg;
662 $nn->$method(@args) and next;
663 die "E: <$uri> $method failed\n";
670 sub _nntp_fetch_all ($$$) {
671 my ($self, $nn, $uri) = @_;
672 my ($group, $num_a, $num_b) = $uri->group;
673 my $sec = uri_section($uri);
674 my ($nr, $beg, $end) = $nn->group($group);
675 unless (defined($nr)) {
676 my $msg = ndump($nn->message);
677 return "E: GROUP $group <$sec> $msg";
680 # IMAPTracker is also used for tracking NNTP, UID == article number
681 # LIST.ACTIVE can get the equivalent of UIDVALIDITY, but that's
682 # expensive. So we assume newsgroups don't change:
683 my ($itrk, $l_art) = itrk_last($self, $uri);
685 # allow users to specify articles to refetch
686 # cf. https://tools.ietf.org/id/draft-gilman-news-url-01.txt
687 # nntp://example.com/inbox.foo/$num_a-$num_b
688 $beg = $num_a if defined($num_a) && $num_a < $beg;
689 $end = $num_b if defined($num_b) && $num_b < $end;
690 if (defined $l_art) {
691 return if $l_art >= $end; # nothing to do
694 my ($err, $art, $last_art, $kw); # kw stays undef, no keywords in NNTP
695 unless ($self->{quiet}) {
696 warn "# $uri fetching ARTICLE $beg..$end\n";
698 my $n = $self->{max_batch};
700 last if $self->{quit};
703 run_commit_cb($self);
704 $itrk->update_last(0, $last_art) if $itrk;
705 $n = $self->{max_batch};
707 my $raw = $nn->article($art);
708 unless (defined($raw)) {
709 my $msg = ndump($nn->message);
710 if ($nn->code == 421) { # pseudo response from Net::Cmd
713 } else { # probably just a deleted message (spam)
718 $raw = join('', @$raw);
719 $raw =~ s/\r\n/\n/sg;
720 my ($eml_cb, @args) = @{$self->{eml_each}};
721 $eml_cb->($uri, $art, $kw, PublicInbox::Eml->new(\$raw), @args);
724 run_commit_cb($self);
725 $itrk->update_last(0, $last_art) if $itrk;
730 my ($self, $url, $eml_cb, @args) = @_;
731 my $uri = ref($url) ? $url : PublicInbox::URInntps->new($url);
732 my $sec = uri_section($uri);
733 local $0 = $uri->group ." $sec";
734 my $nn = nn_get($self, $uri);
735 return if $self->{quit};
738 local $self->{eml_each} = [ $eml_cb, @args ];
739 $err = _nntp_fetch_all($self, $nn, $uri);
741 $err = "E: <$uri> not connected: $!";
743 die $err if $err && $self->{-can_die};
748 sub new { bless {}, shift };
750 # updates $uri with UIDVALIDITY
752 my ($self, $uri) = @_;
753 my $mic = $self->mic_get($uri) or die "E: not connected: $@";
754 my $m = $self->isa('PublicInbox::NetWriter') ? 'select' : 'examine';
755 $mic->$m($uri->mailbox) or return;
757 for ($mic->Results) {
758 /^\* OK \[UIDVALIDITY ([0-9]+)\].*/ or next;
762 $uidval //= $mic->uidvalidity($uri->mailbox) or
763 die "E: failed to get uidvalidity from <$uri>: $@";
764 $uri->uidvalidity($uidval);