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 ($$$$) { # nn = Net::NNTP
177 my ($self, $uri, $nn_args, $lei) = @_;
178 my $sec = uri_section($uri);
179 my $nntp_opt = $self->{nntp_opt}->{$sec} //= {};
180 my $host = $uri->host;
181 # Net::NNTP and Net::Netrc both mishandle `0', so we pass `127.0.0.1'
182 $host = '127.0.0.1' if $host eq '0';
185 if (defined(my $ui = $uri->userinfo)) {
186 require PublicInbox::GitCredential;
189 protocol => $uri->scheme,
191 }, 'PublicInbox::GitCredential';
192 ($u, $p) = split(/:/, $ui, 2);
193 ($cred->{username}, $cred->{password}) = ($u, $p);
194 $cred->check_netrc unless defined $p;
196 my $common = $nn_args->{$sec} // {};
200 SSL => $uri->secure, # snews == nntps
201 %$common, # may Debug ....
203 my $sa = $self->{-proxy_cli};
204 %$nn_arg = (%$nn_arg, %$sa) if $sa;
205 my $nn = nn_new($nn_arg, $nntp_opt, $uri);
207 $cred->fill($lei); # may prompt user here
208 if ($nn->authinfo($u, $p)) {
209 push @{$nntp_opt->{-postconn}}, [ 'authinfo', $u, $p ];
211 warn "E: <$uri> AUTHINFO $u XXXX failed\n";
216 if ($nntp_opt->{compress}) {
217 # https://rt.cpan.org/Ticket/Display.html?id=129967
218 if ($nn->can('compress')) {
220 push @{$nntp_opt->{-postconn}}, [ 'compress' ];
222 warn "W: <$uri> COMPRESS failed\n";
225 delete $nntp_opt->{compress};
227 W: <$uri> COMPRESS not supported by Net::NNTP
228 W: see https://rt.cpan.org/Ticket/Display.html?id=129967 for updates
233 $self->{nn_arg}->{$sec} = $nn_arg;
234 $cred->run($nn ? 'approve' : 'reject') if $cred;
239 my ($url, $ls_ok) = @_;
240 require PublicInbox::URIimap;
241 my $uri = PublicInbox::URIimap->new($url);
242 $uri && ($ls_ok || $uri->mailbox) ? $uri->canonical : undef;
245 my %IS_NNTP = (news => 1, snews => 1, nntp => 1, nntps => 1);
247 my ($url, $ls_ok) = @_;
248 require PublicInbox::URInntps;
249 my $uri = PublicInbox::URInntps->new($url);
250 $uri && $IS_NNTP{$uri->scheme} && ($ls_ok || $uri->group) ?
251 $uri->canonical : undef;
254 sub cfg_intvl ($$$) {
255 my ($cfg, $key, $url) = @_;
256 my $v = $cfg->urlmatch($key, $url) // return;
257 $v =~ /\A[0-9]+(?:\.[0-9]+)?\z/s and return $v + 0;
258 if (ref($v) eq 'ARRAY') {
259 $v = join(', ', @$v);
260 warn "W: $key has multiple values: $v\nW: $key ignored\n";
262 warn "W: $key=$v is not a numeric value in seconds\n";
267 my ($cfg, $key, $url) = @_;
268 my $orig = $cfg->urlmatch($key, $url) // return;
269 my $bool = $cfg->git_bool($orig);
270 warn "W: $key=$orig for $url is not boolean\n" unless defined($bool);
274 # flesh out common IMAP-specific data structures
275 sub imap_common_init ($;$) {
276 my ($self, $lei) = @_;
277 return unless $self->{imap_order};
278 $self->{quiet} = 1 if $lei && $lei->{opt}->{quiet};
279 eval { require PublicInbox::IMAPClient } or
280 die "Mail::IMAPClient is required for IMAP:\n$@\n";
281 ($lei || eval { require PublicInbox::IMAPTracker }) or
282 die "DBD::SQLite is required for IMAP\n:$@\n";
283 require PublicInbox::URIimap;
284 my $cfg = $self->{pi_cfg} // $lei->_lei_cfg;
285 my $mic_args = {}; # scheme://authority => Mail:IMAPClient arg
286 for my $uri (@{$self->{imap_order}}) {
287 my $sec = uri_section($uri);
288 for my $k (qw(Starttls Debug Compress)) {
289 my $bool = cfg_bool($cfg, "imap.$k", $$uri) // next;
290 $mic_args->{$sec}->{$k} = $bool;
292 my $to = cfg_intvl($cfg, 'imap.timeout', $$uri);
293 $mic_args->{$sec}->{Timeout} = $to if $to;
294 my $sa = socks_args($cfg->urlmatch('imap.Proxy', $$uri));
295 $self->{imap_opt}->{$sec}->{-proxy_cfg} = $sa if $sa;
296 for my $k (qw(pollInterval idleInterval)) {
297 $to = cfg_intvl($cfg, "imap.$k", $$uri) // next;
298 $self->{imap_opt}->{$sec}->{$k} = $to;
300 my $k = 'imap.fetchBatchSize';
301 my $bs = $cfg->urlmatch($k, $$uri) // next;
302 if ($bs =~ /\A([0-9]+)\z/) {
303 $self->{imap_opt}->{$sec}->{batch_size} = $bs;
305 warn "$k=$bs is not an integer\n";
308 # make sure we can connect and cache the credentials in memory
309 $self->{mic_arg} = {}; # schema://authority => IMAPClient->new args
310 my $mics = {}; # schema://authority => IMAPClient obj
311 for my $orig_uri (@{$self->{imap_order}}) {
312 my $sec = uri_section($orig_uri);
313 my $uri = PublicInbox::URIimap->new("$sec/");
314 my $mic = $mics->{$sec} //=
315 mic_for($self, $uri, $mic_args, $lei) //
316 die "Unable to continue\n";
317 next unless $self->isa('PublicInbox::NetWriter');
318 my $dst = $orig_uri->mailbox // next;
319 next if $mic->exists($dst); # already exists
320 $mic->create($dst) or die "CREATE $dst failed <$orig_uri>: $@";
325 # flesh out common NNTP-specific data structures
326 sub nntp_common_init ($;$) {
327 my ($self, $lei) = @_;
328 return unless $self->{nntp_order};
329 $self->{quiet} = 1 if $lei && $lei->{opt}->{quiet};
330 eval { require Net::NNTP } or
331 die "Net::NNTP is required for NNTP:\n$@\n";
332 ($lei || eval { require PublicInbox::IMAPTracker }) or
333 die "DBD::SQLite is required for NNTP\n:$@\n";
334 my $cfg = $self->{pi_cfg} // $lei->_lei_cfg;
335 my $nn_args = {}; # scheme://authority => Net::NNTP->new arg
336 for my $uri (@{$self->{nntp_order}}) {
337 my $sec = uri_section($uri);
338 my $args = $nn_args->{$sec} //= {};
340 # Debug and Timeout are passed to Net::NNTP->new
341 my $v = cfg_bool($cfg, 'nntp.Debug', $$uri);
342 $args->{Debug} = $v if defined $v;
343 my $to = cfg_intvl($cfg, 'nntp.Timeout', $$uri);
344 $args->{Timeout} = $to if $to;
345 my $sa = socks_args($cfg->urlmatch('nntp.Proxy', $$uri));
346 %$args = (%$args, %$sa) if $sa;
348 # Net::NNTP post-connect commands
349 for my $k (qw(starttls compress)) {
350 $v = cfg_bool($cfg, "nntp.$k", $$uri) // next;
351 $self->{nntp_opt}->{$sec}->{$k} = $v;
354 # -watch internal option
355 for my $k (qw(pollInterval)) {
356 $to = cfg_intvl($cfg, "nntp.$k", $$uri) // next;
357 $self->{nntp_opt}->{$sec}->{$k} = $to;
360 # make sure we can connect and cache the credentials in memory
361 $self->{nn_arg} = {}; # schema://authority => Net::NNTP->new args
362 my %nn; # schema://authority => Net::NNTP object
363 for my $uri (@{$self->{nntp_order}}) {
364 my $sec = uri_section($uri);
365 $nn{$sec} //= nn_for($self, $uri, $nn_args, $lei);
367 \%nn; # for optional {nn_cached}
371 my ($self, $arg, $ls_ok) = @_;
373 if ($uri = imap_uri($arg, $ls_ok)) {
374 $_[1] = $$uri; # canonicalized
375 push @{$self->{imap_order}}, $uri;
376 } elsif ($uri = nntp_uri($arg, $ls_ok)) {
377 $_[1] = $$uri; # canonicalized
378 push @{$self->{nntp_order}}, $uri;
380 push @{$self->{unsupported_url}}, $arg;
385 my ($self, $lei) = @_;
386 if (my $u = $self->{unsupported_url}) {
387 return "Unsupported URL(s): @$u";
389 if ($self->{imap_order}) {
390 eval { require PublicInbox::IMAPClient } or
391 die "Mail::IMAPClient is required for IMAP:\n$@\n";
393 if ($self->{nntp_order}) {
394 eval { require Net::NNTP } or
395 die "Net::NNTP is required for NNTP:\n$@\n";
397 my $sa = socks_args($lei ? $lei->{opt}->{proxy} : undef);
398 $self->{-proxy_cli} = $sa if $sa;
402 sub flags2kw ($$$$) {
403 my ($self, $uri, $uid, $flags) = @_;
405 for my $f (split(/ /, $flags)) {
406 if (my $k = $IMAPflags2kw{$f}) {
408 } elsif ($f eq "\\Recent") { # not in JMAP
409 } elsif ($f eq "\\Deleted") { # not in JMAP
411 } elsif ($self->{verbose}) {
412 warn "# unknown IMAP flag $f <$uri/;UID=$uid>\n";
415 @$kw = sort @$kw; # for LeiSearch->kw_changed and UI/UX purposes
419 sub _imap_do_msg ($$$$$) {
420 my ($self, $uri, $uid, $raw, $flags) = @_;
421 # our target audience expects LF-only, save storage
422 $$raw =~ s/\r\n/\n/sg;
423 my $kw = defined($flags) ?
424 (flags2kw($self, $uri, $uid, $flags) // return) : undef;
425 my ($eml_cb, @args) = @{$self->{eml_each}};
426 $eml_cb->($uri, $uid, $kw, PublicInbox::Eml->new($raw), @args);
429 sub run_commit_cb ($) {
431 my $cmt_cb_args = $self->{on_commit} or return;
432 my ($cb, @args) = @$cmt_cb_args;
436 sub itrk_last ($$;$$) {
437 my ($self, $uri, $r_uidval, $mic) = @_;
438 return (undef, undef, $r_uidval) unless $self->{incremental};
439 my ($itrk, $l_uid, $l_uidval);
440 if (defined(my $lms = $self->{-lms_ro})) { # LeiMailSync or 0
441 $uri->uidvalidity($r_uidval) if defined $r_uidval;
443 my $auth = $mic->Authmechanism // '';
444 $uri->auth($auth) if $auth eq 'ANONYMOUS';
445 my $user = $mic->User;
446 $uri->user($user) if defined($user);
449 $l_uid = ($lms && ($x = $lms->location_stats($$uri))) ?
450 $x->{'uid.max'} : undef;
451 # itrk remains undef, lei/store worker writes to
454 $itrk = PublicInbox::IMAPTracker->new($$uri);
455 ($l_uidval, $l_uid) = $itrk->get_last($$uri);
457 ($itrk, $l_uid, $l_uidval //= $r_uidval);
460 # import flags of already-seen messages
461 sub each_old_flags ($$$$) {
462 my ($self, $mic, $uri, $l_uid) = @_;
464 my $sec = uri_section($uri);
465 my $bs = ($self->{imap_opt}->{$sec}->{batch_size} // 1) * 10000;
466 my ($eml_cb, @args) = @{$self->{eml_each}};
467 $self->{quiet} or warn "# $uri syncing flags 1:$l_uid\n";
468 for (my $n = 1; $n <= $l_uid; $n += $bs) {
470 $end = $l_uid if $end > $l_uid;
471 my $r = $mic->fetch_hash("$n:$end", 'FLAGS');
473 return if $!{EINTR} && $self->{quit};
474 return "E: $uri UID FETCH $n:$end error: $!";
476 while (my ($uid, $per_uid) = each %$r) {
477 my $kw = flags2kw($self, $uri, $uid, $per_uid->{FLAGS})
479 # LeiImport->input_net_cb
480 $eml_cb->($uri, $uid, $kw, undef, @args);
485 # returns true if PERMANENTFLAGS indicates FLAGS of already imported
486 # messages are meaningful
489 return if !defined($perm_fl);
490 for my $f (split(/[ \t]+/, $perm_fl)) {
491 return 1 if $IMAPflags2kw{$f};
496 sub _imap_fetch_all ($$$) {
497 my ($self, $mic, $orig_uri) = @_;
498 my $sec = uri_section($orig_uri);
499 my $mbx = $orig_uri->mailbox;
500 $mic->Clear(1); # trim results history
502 # we need to check for mailbox writability to see if we care about
503 # FLAGS from already-imported messages.
504 my $cmd = $self->{each_old} ? 'select' : 'examine';
505 $mic->$cmd($mbx) or return "E: \U$cmd\E $mbx ($sec) failed: $!";
507 my ($r_uidval, $r_uidnext, $perm_fl);
508 for ($mic->Results) {
509 /^\* OK \[PERMANENTFLAGS \(([^\)]*)\)\].*/ and $perm_fl = $1;
510 /^\* OK \[UIDVALIDITY ([0-9]+)\].*/ and $r_uidval = $1;
511 /^\* OK \[UIDNEXT ([0-9]+)\].*/ and $r_uidnext = $1;
513 $r_uidval //= $mic->uidvalidity($mbx) //
514 return "E: $orig_uri cannot get UIDVALIDITY";
515 $r_uidnext //= $mic->uidnext($mbx) //
516 return "E: $orig_uri cannot get UIDNEXT";
517 my $expect = $orig_uri->uidvalidity // $r_uidval;
518 return <<EOF if $expect != $r_uidval;
519 E: $orig_uri UIDVALIDITY mismatch (got $r_uidval)
522 my $uri = $orig_uri->clone;
523 my $single_uid = $uri->uid;
524 my ($itrk, $l_uid, $l_uidval) = itrk_last($self, $uri, $r_uidval, $mic);
525 if (defined($single_uid)) {
526 $itrk = $l_uid = undef;
527 $uri->uid(undef); # for eml_cb
529 return <<EOF if $l_uidval != $r_uidval;
530 E: $uri UIDVALIDITY mismatch
531 E: local=$l_uidval != remote=$r_uidval
533 $uri->uidvalidity($r_uidval);
535 my $r_uid = $r_uidnext - 1;
536 return <<EOF if $l_uid > $r_uid;
537 E: $uri local UID exceeds remote ($l_uid > $r_uid)
538 E: $uri strangely, UIDVALIDLITY matches ($l_uidval)
540 $mic->Uid(1); # the default, we hope
542 my $use_fl = perm_fl_ok($perm_fl);
543 if (!defined($single_uid) && $self->{each_old} && $use_fl) {
544 $err = each_old_flags($self, $mic, $uri, $l_uid);
547 return if $l_uid >= $r_uid; # nothing to do
549 my ($mod, $shard) = @{$self->{shard_info} // []};
550 unless ($self->{quiet}) {
551 my $m = $mod ? " [(UID % $mod) == $shard]" : '';
552 warn "# $uri fetching UID $l_uid:$r_uid$m\n";
554 my $bs = $self->{imap_opt}->{$sec}->{batch_size} // 1;
555 my $req = $mic->imap4rev1 ? 'BODY.PEEK[]' : 'RFC822.PEEK';
560 # I wish "UID FETCH $START:*" could work, but:
561 # 1) servers do not need to return results in any order
562 # 2) Mail::IMAPClient doesn't offer a streaming API
563 if (defined $single_uid) {
564 $uids = [ $single_uid ];
565 } elsif (!($uids = $mic->search("UID $l_uid:*"))) {
566 return if $!{EINTR} && $self->{quit};
567 return "E: $uri UID SEARCH $l_uid:* error: $!";
569 return if scalar(@$uids) == 0;
571 # RFC 3501 doesn't seem to indicate order of UID SEARCH
572 # responses, so sort it ourselves. Order matters so
573 # IMAPTracker can store the newest UID.
574 @$uids = sort { $a <=> $b } @$uids;
576 # Did we actually get new messages?
577 return if $uids->[0] < $l_uid;
579 $l_uid = $uids->[-1] + 1; # for next search
581 my $n = $self->{max_batch};
583 @$uids = grep { ($_ % $mod) == $shard } @$uids if $mod;
584 while (scalar @$uids) {
585 my @batch = splice(@$uids, 0, $bs);
586 $batch = join(',', @batch);
587 local $0 = "UID:$batch $mbx $sec";
588 my $r = $mic->fetch_hash($batch, $req, 'FLAGS');
589 unless ($r) { # network error?
590 last if $!{EINTR} && $self->{quit};
591 $err = "E: $uri UID FETCH $batch error: $!";
594 for my $uid (@batch) {
595 # messages get deleted, so holes appear
596 my $per_uid = delete $r->{$uid} // next;
597 my $raw = delete($per_uid->{$key}) // next;
598 my $fl = $use_fl ? $per_uid->{FLAGS} : undef;
599 _imap_do_msg($self, $uri, $uid, \$raw, $fl);
601 last if $self->{quit};
603 last if $self->{quit};
605 run_commit_cb($self);
606 $itrk->update_last($r_uidval, $last_uid) if $itrk;
607 } until ($err || $self->{quit} || defined($single_uid));
611 # uses cached auth info prepared by mic_for
613 my ($self, $uri) = @_;
614 my $sec = uri_section($uri);
615 # see if caller saved result of imap_common_init
616 my $cached = $self->{mics_cached};
618 my $mic = $cached->{$sec};
619 return $mic if $mic && $mic->IsConnected;
620 delete $cached->{$sec};
622 my $mic_arg = $self->{mic_arg}->{$sec} or
623 die "BUG: no Mail::IMAPClient->new arg for $sec";
624 if (defined(my $cb_name = $mic_arg->{Authcallback})) {
625 if (ref($cb_name) ne 'CODE') {
626 $mic_arg->{Authcallback} = $self->can($cb_name);
629 my $mic = mic_new($self, $mic_arg, $sec, $uri);
630 $cached //= {}; # invalid placeholder if no cache enabled
631 $mic && $mic->IsConnected ? ($cached->{$sec} = $mic) : undef;
635 my ($self, $url, $eml_cb, @args) = @_;
636 my $uri = ref($url) ? $url : PublicInbox::URIimap->new($url);
637 my $sec = uri_section($uri);
638 local $0 = $uri->mailbox." $sec";
639 my $mic = mic_get($self, $uri);
642 local $self->{eml_each} = [ $eml_cb, @args ];
643 $err = _imap_fetch_all($self, $mic, $uri);
645 $err = "E: <$uri> not connected: $!";
647 die $err if $err && $self->{-can_die};
652 # may used cached auth info prepared by nn_for once
654 my ($self, $uri) = @_;
655 my $sec = uri_section($uri);
656 # see if caller saved result of nntp_common_init
657 my $cached = $self->{nn_cached} // {};
659 $nn = delete($cached->{$sec}) and return $nn;
660 my $nn_arg = $self->{nn_arg}->{$sec} or
661 die "BUG: no Net::NNTP->new arg for $sec";
662 my $nntp_opt = $self->{nntp_opt}->{$sec};
663 $nn = nn_new($nn_arg, $nntp_opt, $uri) or return;
664 if (my $postconn = $nntp_opt->{-postconn}) {
665 for my $m_arg (@$postconn) {
666 my ($method, @args) = @$m_arg;
667 $nn->$method(@args) and next;
668 die "E: <$uri> $method failed\n";
675 sub _nntp_fetch_all ($$$) {
676 my ($self, $nn, $uri) = @_;
677 my ($group, $num_a, $num_b) = $uri->group;
678 my $sec = uri_section($uri);
679 my ($nr, $beg, $end) = $nn->group($group);
680 unless (defined($nr)) {
681 my $msg = ndump($nn->message);
682 return "E: GROUP $group <$sec> $msg";
685 # IMAPTracker is also used for tracking NNTP, UID == article number
686 # LIST.ACTIVE can get the equivalent of UIDVALIDITY, but that's
687 # expensive. So we assume newsgroups don't change:
688 my ($itrk, $l_art) = itrk_last($self, $uri);
690 # allow users to specify articles to refetch
691 # cf. https://tools.ietf.org/id/draft-gilman-news-url-01.txt
692 # nntp://example.com/inbox.foo/$num_a-$num_b
693 $beg = $num_a if defined($num_a) && $num_a < $beg;
694 $end = $num_b if defined($num_b) && $num_b < $end;
695 if (defined $l_art) {
696 return if $l_art >= $end; # nothing to do
699 my ($err, $art, $last_art, $kw); # kw stays undef, no keywords in NNTP
700 unless ($self->{quiet}) {
701 warn "# $uri fetching ARTICLE $beg..$end\n";
703 my $n = $self->{max_batch};
705 last if $self->{quit};
708 run_commit_cb($self);
709 $itrk->update_last(0, $last_art) if $itrk;
710 $n = $self->{max_batch};
712 my $raw = $nn->article($art);
713 unless (defined($raw)) {
714 my $msg = ndump($nn->message);
715 if ($nn->code == 421) { # pseudo response from Net::Cmd
718 } else { # probably just a deleted message (spam)
723 $raw = join('', @$raw);
724 $raw =~ s/\r\n/\n/sg;
725 my ($eml_cb, @args) = @{$self->{eml_each}};
726 $eml_cb->($uri, $art, $kw, PublicInbox::Eml->new(\$raw), @args);
729 run_commit_cb($self);
730 $itrk->update_last(0, $last_art) if $itrk;
735 my ($self, $url, $eml_cb, @args) = @_;
736 my $uri = ref($url) ? $url : PublicInbox::URInntps->new($url);
737 my $sec = uri_section($uri);
738 local $0 = $uri->group ." $sec";
739 my $nn = nn_get($self, $uri);
740 return if $self->{quit};
743 local $self->{eml_each} = [ $eml_cb, @args ];
744 $err = _nntp_fetch_all($self, $nn, $uri);
746 $err = "E: <$uri> not connected: $!";
748 die $err if $err && $self->{-can_die};
753 sub new { bless {}, shift };
755 # updates $uri with UIDVALIDITY
757 my ($self, $uri) = @_;
758 my $mic = $self->mic_get($uri) or die "E: not connected: $@";
759 my $m = $self->isa('PublicInbox::NetWriter') ? 'select' : 'examine';
760 $mic->$m($uri->mailbox) or return;
762 for ($mic->Results) {
763 /^\* OK \[UIDVALIDITY ([0-9]+)\].*/ or next;
767 $uidval //= $mic->uidvalidity($uri->mailbox) or
768 die "E: failed to get uidvalidity from <$uri>: $@";
769 $uri->uidvalidity($uidval);