-# Copyright (C) 2015-2018 all contributors <meta@public-inbox.org>
+# Copyright (C) 2015-2020 all contributors <meta@public-inbox.org>
# License: AGPL-3.0+ <https://www.gnu.org/licenses/agpl-3.0.txt>
-# Streaming interface for formatting messages as an mboxrd.
-# Used by the web interface
+# Streaming (via getline) interface for formatting messages as an mboxrd.
+# Used by the PSGI web interface.
+#
+# public-inbox-httpd favors "getline" response bodies to take a
+# "pull"-based approach to feeding slow clients (as opposed to a
+# more common "push" model)
package PublicInbox::Mbox;
use strict;
use warnings;
-use PublicInbox::MID qw/mid_clean mid_escape/;
+use PublicInbox::MID qw/mid_escape/;
use PublicInbox::Hval qw/to_filename/;
+use PublicInbox::Smsg;
+use PublicInbox::WwwStream qw(html_oneshot);
use Email::Simple;
use Email::MIME::Encode;
sub subject_fn ($) {
- my ($simple) = @_;
- my $fn = $simple->header('Subject');
- return 'no-subject' unless defined($fn);
+ my ($hdr) = @_;
+ my $fn = $hdr->header('Subject');
+ return 'no-subject' if (!defined($fn) || $fn eq '');
# no need for full Email::MIME, here
if ($fn =~ /=\?/) {
eval { $fn = Encode::decode('MIME-Header', $fn) };
- $fn = 'no-subject' if $@;
+ return 'no-subject' if $@;
}
$fn =~ s/^re:\s+//i;
- $fn = to_filename($fn);
- $fn eq '' ? 'no-subject' : $fn;
+ $fn eq '' ? 'no-subject' : to_filename($fn);
}
sub mb_stream {
}
# called by PSGI server as body response
+# this gets called twice for every message, once to return the header,
+# once to retrieve the body
sub getline {
my ($more) = @_; # self
- my ($ctx, $head, $tail, $db, $cur) = @$more;
- if ($cur) {
- pop @$more;
- return msg_str($ctx, $cur);
+ my ($ctx, $id, $prev, $next, $mref, $hdr) = @$more;
+ if ($hdr) { # first message hits this, only
+ pop @$more; # $hdr
+ pop @$more; # $mref
+ return msg_hdr($ctx, $hdr) . msg_body($$mref);
}
- for (; !defined($cur) && $head != $tail; $head++) {
- my $smsg = PublicInbox::SearchMsg->get($head, $db, $ctx->{mid});
- my $mref = $ctx->{-inbox}->msg_by_smsg($smsg) or next;
- $cur = Email::Simple->new($mref);
- $cur = msg_str($ctx, $cur);
- }
- $more->[1] = $head;
- $cur;
+ my $cur = $next or return;
+ my $ibx = $ctx->{-inbox};
+ $next = $ibx->over->next_by_mid($ctx->{mid}, \$id, \$prev);
+ $mref = $ibx->msg_by_smsg($cur) or return;
+ $hdr = Email::Simple->new($mref)->header_obj;
+ @$more = ($ctx, $id, $prev, $next); # $next may be undef, here
+ msg_hdr($ctx, $hdr) . msg_body($$mref);
}
sub close {} # noop
+# /$INBOX/$MESSAGE_ID/raw
sub emit_raw {
my ($ctx) = @_;
my $mid = $ctx->{mid};
my $ibx = $ctx->{-inbox};
- my $first;
- my $more;
- my ($head, $tail, $db);
- my %seen;
- if (my $srch = $ibx->search) {
- $srch->retry_reopen(sub {
- ($head, $tail, $db) = $srch->each_smsg_by_mid($mid);
- for (; !defined($first) && $head != $tail; $head++) {
- my @args = ($head, $db, $mid);
- my $smsg = PublicInbox::SearchMsg->get(@args);
- my $mref = $ibx->msg_by_smsg($smsg) or next;
- $first = Email::Simple->new($mref);
- }
- if ($head != $tail) {
- $more = [ $ctx, $head, $tail, $db, $first ];
- }
- });
+ $ctx->{base_url} = $ibx->base_url($ctx->{env});
+ my ($mref, $more, $id, $prev, $next);
+ if (my $over = $ibx->over) {
+ my $smsg = $over->next_by_mid($mid, \$id, \$prev) or return;
+ $mref = $ibx->msg_by_smsg($smsg) or return;
+ $next = $over->next_by_mid($mid, \$id, \$prev);
} else {
- my $mref = $ibx->msg_by_mid($mid) or return;
- $first = Email::Simple->new($mref);
+ $mref = $ibx->msg_by_mid($mid) or return;
}
- return unless defined $first;
- my $fn = subject_fn($first);
+ my $hdr = Email::Simple->new($mref)->header_obj;
+ $more = [ $ctx, $id, $prev, $next, $mref, $hdr ]; # for ->getline
+ my $fn = subject_fn($hdr);
my @hdr = ('Content-Type');
if ($ibx->{obfuscate}) {
# obfuscation is stupid, but maybe scrapers are, too...
$fn .= '.txt';
}
push @hdr, 'Content-Disposition', "inline; filename=$fn";
- [ 200, \@hdr, $more ? mb_stream($more) : [ msg_str($ctx, $first) ] ];
+ [ 200, \@hdr, mb_stream($more) ];
}
-sub msg_str {
- my ($ctx, $simple, $mid) = @_; # Email::Simple object
- my $header_obj = $simple->header_obj;
+sub msg_hdr ($$;$) {
+ my ($ctx, $header_obj, $mid) = @_;
# drop potentially confusing headers, ssoma already should've dropped
# Lines and Content-Length
$header_obj->header_set($d);
}
my $ibx = $ctx->{-inbox};
- my $base = $ibx->base_url($ctx->{env});
+ my $base = $ctx->{base_url};
$mid = $ctx->{mid} unless defined $mid;
$mid = mid_escape($mid);
my @append = (
'List-Archive', "<$base>",
'List-Post', "<mailto:$ibx->{-primary_address}>",
);
- my $crlf = $simple->crlf;
+ my $crlf = $header_obj->crlf;
my $buf = "From mboxrd\@z Thu Jan 1 00:00:00 1970\n" .
$header_obj->as_string;
for (my $i = 0; $i < @append; $i += 2) {
$buf .= "$k: $v$crlf" if defined $v;
}
$buf .= $crlf;
+}
+sub msg_body ($) {
# mboxrd quoting style
- # ref: http://www.qmail.org/man/man5/mbox.html
- my $body = $simple->body;
- $body =~ s/^(>*From )/>$1/gm;
- $buf .= $body;
- $buf .= "\n";
+ # https://en.wikipedia.org/wiki/Mbox#Modified_mbox
+ # https://www.loc.gov/preservation/digital/formats/fdd/fdd000385.shtml
+ # https://web.archive.org/http://www.qmail.org/man/man5/mbox.html
+ $_[0] =~ s/^(>*From )/>$1/gm;
+ $_[0] .= "\n";
+}
+
+sub thread_cb {
+ my ($ctx) = @_;
+ my $msgs = $ctx->{msgs};
+ while (1) {
+ if (my $smsg = shift @$msgs) {
+ return $smsg;
+ }
+ # refill result set
+ $ctx->{msgs} = $msgs = $ctx->{over}->get_thread($ctx->{mid},
+ $ctx->{prev});
+ return unless @$msgs;
+ $ctx->{prev} = $msgs->[-1];
+ }
}
sub thread_mbox {
- my ($ctx, $srch, $sfx) = @_;
- eval { require IO::Compress::Gzip };
- return sub { need_gzip(@_) } if $@;
- my $prev = 0;
- my $cb = sub {
- my $msgs = $srch->get_thread($ctx->{mid}, $prev);
- $prev = $msgs->[-1]->{num} if scalar(@$msgs);
- $msgs;
- };
- PublicInbox::MboxGz->response($ctx, $cb);
+ my ($ctx, $over, $sfx) = @_;
+ eval { require PublicInbox::MboxGz };
+ return need_gzip($ctx) if $@;
+ my $msgs = $ctx->{msgs} = $over->get_thread($ctx->{mid}, {});
+ return [404, [qw(Content-Type text/plain)], []] if !@$msgs;
+ $ctx->{prev} = $msgs->[-1];
+ $ctx->{over} = $over; # bump refcnt
+ PublicInbox::MboxGz->response($ctx, \&thread_cb, $msgs->[0]->subject);
}
sub emit_range {
mbox_all($ctx, $query);
}
-sub mbox_all {
- my ($ctx, $query) = @_;
-
- eval { require IO::Compress::Gzip };
- return sub { need_gzip(@_) } if $@;
- if ($query eq '') {
- my $prev = 0;
- my $cb = sub { $ctx->{-inbox}->mm->ids_after(\$prev) };
- return PublicInbox::MboxGz->response($ctx, $cb, 'all');
- }
- my $opts = { offset => 0 };
- my $srch = $ctx->{srch};
- my $cb = sub { # called by MboxGz->getline
- my $msgs = $srch->query($query, $opts);
- $opts->{offset} += scalar @$msgs;
- $msgs;
- };
- PublicInbox::MboxGz->response($ctx, $cb, 'results-'.$query);
-}
-
-sub need_gzip {
- my $fh = $_[0]->([501, ['Content-Type' => 'text/html']]);
- my $title = 'gzipped mbox not available';
- $fh->write(<<EOF);
-<html><head><title>$title</title><body><pre>$title
-The administrator needs to install the IO::Compress::Gzip Perl module
-to support gzipped mboxes.
-<a href="../">Return to index</a></pre></body></html>
-EOF
- $fh->close;
+sub all_ids_cb {
+ my ($ctx) = @_;
+ my $ids = $ctx->{ids};
+ do {
+ while ((my $num = shift @$ids)) {
+ my $smsg = $ctx->{over}->get_art($num) or next;
+ return $smsg;
+ }
+ $ctx->{ids} = $ids = $ctx->{mm}->ids_after(\($ctx->{prev}));
+ } while (@$ids);
}
-1;
-
-package PublicInbox::MboxGz;
-use strict;
-use warnings;
-use PublicInbox::Hval qw/to_filename/;
-
-sub new {
- my ($class, $ctx, $cb) = @_;
- my $buf = '';
- bless {
- buf => \$buf,
- gz => IO::Compress::Gzip->new(\$buf, Time => 0),
- cb => $cb,
- ctx => $ctx,
- msgs => [],
- }, $class;
+sub mbox_all_ids {
+ my ($ctx) = @_;
+ my $ibx = $ctx->{-inbox};
+ my $prev = 0;
+ my $mm = $ctx->{mm} = $ibx->mm;
+ my $ids = $mm->ids_after(\$prev) or return
+ [404, [qw(Content-Type text/plain)], ["No results found\n"]];
+ $ctx->{over} = $ibx->over or
+ return PublicInbox::WWW::need($ctx, 'Overview');
+ $ctx->{ids} = $ids;
+ $ctx->{prev} = $prev;
+ return PublicInbox::MboxGz->response($ctx, \&all_ids_cb, 'all');
}
-sub response {
- my ($class, $ctx, $cb, $fn) = @_;
- my $body = $class->new($ctx, $cb);
- # http://www.iana.org/assignments/media-types/application/gzip
- $body->{hdr} = [ 'Content-Type', 'application/gzip' ];
- $body->{fn} = $fn;
- my $hdr = $body->getline; # fill in Content-Disposition filename
- [ 200, $hdr, $body ];
+sub results_cb {
+ my ($ctx) = @_;
+ my $mset = $ctx->{mset};
+ my $srch = $ctx->{srch};
+ while (1) {
+ while (my $mi = (($mset->items)[$ctx->{iter}++])) {
+ my $smsg = PublicInbox::Smsg::from_mitem($mi,
+ $srch) or next;
+ return $smsg;
+ }
+ # refill result set
+ $mset = $ctx->{mset} = $srch->query($ctx->{query},
+ $ctx->{qopts});
+ my $size = $mset->size or return;
+ $ctx->{qopts}->{offset} += $size;
+ $ctx->{iter} = 0;
+ }
}
-sub set_filename ($$) {
- my ($fn, $msg) = @_;
- return to_filename($fn) if defined($fn);
+sub mbox_all {
+ my ($ctx, $query) = @_;
- PublicInbox::Mbox::subject_fn($msg);
+ eval { require PublicInbox::MboxGz };
+ return need_gzip($ctx) if $@;
+ return mbox_all_ids($ctx) if $query eq '';
+ my $qopts = $ctx->{qopts} = { mset => 2 };
+ my $srch = $ctx->{srch} = $ctx->{-inbox}->search or
+ return PublicInbox::WWW::need($ctx, 'Search');;
+ my $mset = $ctx->{mset} = $srch->query($query, $qopts);
+ $qopts->{offset} = $mset->size or
+ return [404, [qw(Content-Type text/plain)],
+ ["No results found\n"]];
+ $ctx->{iter} = 0;
+ $ctx->{query} = $query;
+ PublicInbox::MboxGz->response($ctx, \&results_cb, 'results-'.$query);
}
-# called by Plack::Util::foreach or similar
-sub getline {
- my ($self) = @_;
- my $ctx = $self->{ctx} or return;
- my $ibx = $ctx->{-inbox};
- my $gz = $self->{gz};
- my $msgs = $self->{msgs};
- do {
- # work on existing result set
- while (defined(my $smsg = shift @$msgs)) {
- # ids_after may return integers
- ref($smsg) or
- $smsg = $ctx->{srch}->{over_ro}->get_art($smsg);
-
- my $msg = eval { $ibx->msg_by_smsg($smsg) } or next;
- $msg = Email::Simple->new($msg);
- $gz->write(PublicInbox::Mbox::msg_str($ctx, $msg,
- $smsg->mid));
-
- # use subject of first message as subject
- if (my $hdr = delete $self->{hdr}) {
- my $fn = set_filename($self->{fn}, $msg);
- push @$hdr, 'Content-Disposition',
- "inline; filename=$fn.mbox.gz";
- return $hdr;
- }
- my $bref = $self->{buf};
- if (length($$bref) >= 8192) {
- my $ret = $$bref; # copy :<
- ${$self->{buf}} = '';
- return $ret;
- }
+sub need_gzip {
+ html_oneshot($_[0], 501, \<<EOF);
+<pre>gzipped mbox not available
- # be fair to other clients on public-inbox-httpd:
- return '';
- }
+The administrator needs to install the Compress::Raw::Zlib Perl module
+to support gzipped mboxes.
- # refill result set
- $msgs = $self->{msgs} = $self->{cb}->();
- } while (@$msgs);
- $gz->close;
- # signal that we're done and can return undef next call:
- delete $self->{ctx};
- ${delete $self->{buf}};
+<a href="../">Return to index</a></pre>
+EOF
}
-sub close {} # noop
-
1;