-# Copyright (C) 2015 all contributors <meta@public-inbox.org>
-# License: AGPLv3 or later (https://www.gnu.org/licenses/agpl-3.0.txt)
-
-# Streaming interface for formatting messages as an mboxrd.
-# Used by the web interface
+# Copyright (C) 2015-2020 all contributors <meta@public-inbox.org>
+# License: AGPL-3.0+ <https://www.gnu.org/licenses/agpl-3.0.txt>
+
+# 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/;
-use URI::Escape qw/uri_escape_utf8/;
-use Plack::Util;
-require Email::Simple;
-
-sub emit1 {
- my ($ctx, $msg) = @_;
- $msg = Email::Simple->new($msg);
- # single message should be easily renderable in browsers
- [200, ['Content-Type', 'text/plain'], [ msg_str($ctx, $msg)] ]
+use PublicInbox::MID qw/mid_escape/;
+use PublicInbox::Hval qw/to_filename/;
+use PublicInbox::SearchMsg;
+use Email::Simple;
+use Email::MIME::Encode;
+
+sub subject_fn ($) {
+ 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) };
+ return 'no-subject' if $@;
+ }
+ $fn =~ s/^re:\s+//i;
+ $fn eq '' ? 'no-subject' : to_filename($fn);
+}
+
+sub mb_stream {
+ my ($more) = @_;
+ bless $more, 'PublicInbox::Mbox';
+}
+
+# called by PSGI server as body response
+# this gets called twice for every message, once to return the header,
+# once to retrieve the body
+sub getline {
+ my ($more) = @_; # self
+ my ($ctx, $id, $prev, $next, $mref, $hdr) = @$more;
+ if ($hdr) { # first message hits this, only
+ pop @$more; # $hdr
+ return msg_hdr($ctx, $hdr);
+ }
+ if ($mref) { # all messages hit this
+ pop @$more; # $mref
+ return msg_body($$mref);
+ }
+ my $cur = $next or return;
+ my $ibx = $ctx->{-inbox};
+ $next = $ibx->over->next_by_mid($ctx->{mid}, \$id, \$prev);
+ $mref = $ibx->msg_by_smsg($cur) or return;
+ $hdr = Email::Simple->new($mref)->header_obj;
+ @$more = ($ctx, $id, $prev, $next, $mref); # $next may be undef, here
+ msg_hdr($ctx, $hdr); # all but first message hits this
+}
+
+sub close {} # noop
+
+# /$INBOX/$MESSAGE_ID/raw
+sub emit_raw {
+ my ($ctx) = @_;
+ my $mid = $ctx->{mid};
+ my $ibx = $ctx->{-inbox};
+ $ctx->{base_url} = $ibx->base_url($ctx->{env});
+ my ($mref, $more, $id, $prev, $next);
+ if (my $over = $ibx->over) {
+ my $smsg = $over->next_by_mid($mid, \$id, \$prev) or return;
+ $mref = $ibx->msg_by_smsg($smsg) or return;
+ $next = $over->next_by_mid($mid, \$id, \$prev);
+ } else {
+ $mref = $ibx->msg_by_mid($mid) or return;
+ }
+ my $hdr = Email::Simple->new($mref)->header_obj;
+ $more = [ $ctx, $id, $prev, $next, $mref, $hdr ]; # for ->getline
+ my $fn = subject_fn($hdr);
+ my @hdr = ('Content-Type');
+ if ($ibx->{obfuscate}) {
+ # obfuscation is stupid, but maybe scrapers are, too...
+ push @hdr, 'application/mbox';
+ $fn .= '.mbox';
+ } else {
+ push @hdr, 'text/plain';
+ $fn .= '.txt';
+ }
+ push @hdr, 'Content-Disposition', "inline; filename=$fn";
+ [ 200, \@hdr, mb_stream($more) ];
}
-sub msg_str {
- my ($ctx, $simple) = @_; # Email::Simple object
- my $header_obj = $simple->header_obj;
+sub msg_hdr ($$;$) {
+ my ($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->{cgi});
- my $mid = mid_clean($header_obj->header('Message-ID'));
- $mid = uri_escape_utf8($mid);
+ my $base = $ctx->{base_url};
+ $mid = $ctx->{mid} unless defined $mid;
+ $mid = mid_escape($mid);
my @append = (
'Archived-At', "<$base$mid/>",
'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 $cb = sub { $srch->get_thread($ctx->{mid}, @_) };
- # http://www.iana.org/assignments/media-types/application/gzip
- [200, ['Content-Type' => 'application/gzip'],
- PublicInbox::MboxGz->new($ctx, $cb) ];
+ my ($ctx, $over, $sfx) = @_;
+ eval { require PublicInbox::MboxGz };
+ return need_gzip() 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, $msgs->[0]->subject);
}
sub emit_range {
my ($ctx, $range) = @_;
- eval { require IO::Compress::Gzip };
- return sub { need_gzip(@_) } if $@;
my $query;
if ($range eq 'all') { # TODO: YYYY[-MM]
$query = '';
} else {
return [404, [qw(Content-Type text/plain)], []];
}
- my $cb = sub { $ctx->{srch}->query($query, @_) };
+ mbox_all($ctx, $query);
+}
- # http://www.iana.org/assignments/media-types/application/gzip
- [200, [qw(Content-Type application/gzip)],
- PublicInbox::MboxGz->new($ctx, $cb) ];
+sub all_ids_cb {
+ my ($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);
+}
+
+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 results_cb {
+ my ($ctx) = @_;
+ my $mset = $ctx->{mset};
+ my $srch = $ctx->{srch};
+ while (1) {
+ while (my $mi = (($mset->items)[$ctx->{iter}++])) {
+ my $smsg = PublicInbox::SearchMsg::from_mitem($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;
+ $ctx->{iter} = 0;
+ }
+}
+
+sub mbox_all {
+ my ($ctx, $query) = @_;
+
+ eval { require PublicInbox::MboxGz };
+ return need_gzip() 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);
}
sub need_gzip {
- my $fh = $_[0]->([501, ['Content-Type' => 'text/html']]);
my $title = 'gzipped mbox not available';
- $fh->write(<<EOF);
+ my $body = <<EOF;
<html><head><title>$title</title><body><pre>$title
-The administrator needs to install the IO::Compress::Gzip Perl module
+The administrator needs to install the Compress::Raw::Zlib Perl module
to support gzipped mboxes.
<a href="../">Return to index</a></pre></body></html>
EOF
- $fh->close;
-}
-
-1;
-package PublicInbox::MboxGz;
-use strict;
-use warnings;
-
-sub new {
- my ($class, $ctx, $cb) = @_;
- my $buf = '';
- bless {
- buf => \$buf,
- gz => IO::Compress::Gzip->new(\$buf, Time => 0),
- cb => $cb,
- ctx => $ctx,
- msgs => [],
- opts => { asc => 1, offset => 0 },
- }, $class;
-}
-
-# called by Plack::Util::foreach or similar
-sub getline {
- my ($self) = @_;
- my $ctx = $self->{ctx} or return;
- my $res;
- my $ibx = $ctx->{-inbox};
- my $gz = $self->{gz};
- do {
- while (defined(my $smsg = shift @{$self->{msgs}})) {
- my $msg = eval { $ibx->msg_by_mid($smsg->mid) } or next;
- $msg = Email::Simple->new($msg);
- $gz->write(PublicInbox::Mbox::msg_str($ctx, $msg));
- my $bref = $self->{buf};
- if (length($$bref) >= 8192) {
- my $ret = $$bref; # copy :<
- ${$self->{buf}} = '';
- return $ret;
- }
- }
- $res = $self->{cb}->($self->{opts});
- $self->{msgs} = $res->{msgs};
- $res = scalar @{$self->{msgs}};
- $self->{opts}->{offset} += $res;
- } while ($res);
- $gz->close;
- delete $self->{ctx};
- ${delete $self->{buf}};
+ [501,[qw(Content-Type text/html Content-Length), bytes::length($body)],
+ [ $body ] ];
}
-sub close {} # noop
-
1;