-# Copyright (C) 2015-2018 all contributors <meta@public-inbox.org>
+# Copyright (C) 2015-2019 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 Email::MIME::Encode;
sub subject_fn ($) {
- my ($simple) = @_;
- my $fn = $simple->header('Subject');
+ my ($hdr) = @_;
+ my $fn = $hdr->header('Subject');
return 'no-subject' unless defined($fn);
# no need for full Email::MIME, here
}
# 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; # $hdr
+ return msg_hdr($ctx, $hdr);
}
- for (; !defined($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, $cur);
+ if ($mref) { # all messages hit this
+ pop @$more; # $mref
+ return msg_body($$mref);
}
- $more->[1] = $head;
- $cur;
+ my $cur = $next or return;
+ my $ibx = $ctx->{-inbox};
+ $next = $ibx->over->next_by_mid($ctx->{mid}, \$id, \$prev);
+ $mref = $ibx->msg_by_smsg($cur) or return;
+ $hdr = Email::Simple->new($mref)->header_obj;
+ @$more = ($ctx, $id, $prev, $next, $mref); # $next may be undef, here
+ msg_hdr($ctx, $hdr); # all but first message hits this
}
sub close {} # noop
my ($ctx) = @_;
my $mid = $ctx->{mid};
my $ibx = $ctx->{-inbox};
- my $first;
- my $more;
- my ($head, $tail, $db);
- my %seen;
- if (my $srch = $ibx->search) {
- $srch->retry_reopen(sub {
- ($head, $tail, $db) = $srch->each_smsg_by_mid($mid);
- for (; !defined($first) && $head != $tail; $head++) {
- my @args = ($head, $db, $mid);
- my $smsg = PublicInbox::SearchMsg->get(@args);
- my $mref = $ibx->msg_by_smsg($smsg) or next;
- $first = Email::Simple->new($mref);
- }
- if ($head != $tail) {
- $more = [ $ctx, $head, $tail, $db, $first ];
- }
- });
+ my ($mref, $more, $id, $prev, $next);
+ if (my $over = $ibx->over) {
+ my $smsg = $over->next_by_mid($mid, \$id, \$prev) or return;
+ $mref = $ibx->msg_by_smsg($smsg) or return;
+ $next = $over->next_by_mid($mid, \$id, \$prev);
} else {
- my $mref = $ibx->msg_by_mid($mid) or return;
- $first = Email::Simple->new($mref);
+ $mref = $ibx->msg_by_mid($mid) or return;
}
- return unless defined $first;
- my $fn = subject_fn($first);
+ my $hdr = Email::Simple->new($mref)->header_obj;
+ $more = [ $ctx, $id, $prev, $next, $mref, $hdr ]; # for ->getline
+ my $fn = subject_fn($hdr);
my @hdr = ('Content-Type');
if ($ibx->{obfuscate}) {
# obfuscation is stupid, but maybe scrapers are, too...
$fn .= '.txt';
}
push @hdr, 'Content-Disposition', "inline; filename=$fn";
- [ 200, \@hdr, $more ? mb_stream($more) : [ msg_str($ctx, $first) ] ];
+ [ 200, \@hdr, mb_stream($more) ];
}
-sub msg_str {
- my ($ctx, $simple, $mid) = @_; # Email::Simple object
- my $header_obj = $simple->header_obj;
+sub msg_hdr ($$;$) {
+ my ($ctx, $header_obj, $mid) = @_;
# drop potentially confusing headers, ssoma already should've dropped
# Lines and Content-Length
'List-Archive', "<$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";
+ $_[0] =~ s/^(>*From )/>$1/gm;
+ $_[0] .= "\n";
}
sub thread_mbox {
- my ($ctx, $srch, $sfx) = @_;
+ my ($ctx, $over, $sfx) = @_;
eval { require IO::Compress::Gzip };
return sub { need_gzip(@_) } if $@;
my $mid = $ctx->{mid};
- my $msgs = $srch->get_thread($mid, 0);
+ my $msgs = $over->get_thread($mid, {});
return [404, [qw(Content-Type text/plain)], []] if !@$msgs;
- my $prev = $msgs->[-1]->{num};
+ my $prev = $msgs->[-1];
my $i = 0;
my $cb = sub {
while (1) {
return $smsg;
}
# refill result set
- $msgs = $srch->get_thread($mid, $prev);
+ $msgs = $over->get_thread($mid, $prev);
return unless @$msgs;
- $prev = $msgs->[-1]->{num};
+ $prev = $msgs->[-1];
$i = 0;
}
};
sub mbox_all_ids {
my ($ctx) = @_;
my $prev = 0;
- my $ids = $ctx->{-inbox}->mm->ids_after(\$prev) or return
+ my $ibx = $ctx->{-inbox};
+ my $ids = $ibx->mm->ids_after(\$prev) or return
[404, [qw(Content-Type text/plain)], ["No results found\n"]];
my $i = 0;
- my $over = $ctx->{srch}->{over_ro};
+ my $over = $ibx->over or
+ return PublicInbox::WWW::need($ctx, 'Overview');
my $cb = sub {
do {
while ((my $num = $ids->[$i++])) {
my $smsg = $over->get_art($num) or next;
return $smsg;
}
- $ids = $ctx->{-inbox}->mm->ids_after(\$prev);
+ $ids = $ibx->mm->ids_after(\$prev);
$i = 0;
} while (@$ids);
undef;
return sub { need_gzip(@_) } if $@;
return mbox_all_ids($ctx) if $query eq '';
my $opts = { mset => 2 };
- my $srch = $ctx->{srch};
+ my $srch = $ctx->{-inbox}->search or
+ return PublicInbox::WWW::need($ctx, 'Search');;
my $mset = $srch->query($query, $opts);
$opts->{offset} = $mset->size or
return [404, [qw(Content-Type text/plain)],
sub getline {
my ($self) = @_;
my $ctx = $self->{ctx} or return;
+ my $gz = $self->{gz};
while (my $smsg = $self->{cb}->()) {
- my $msg = $ctx->{-inbox}->msg_by_smsg($smsg) or next;
- $msg = Email::Simple->new($msg);
- $self->{gz}->write(PublicInbox::Mbox::msg_str($ctx, $msg,
- $smsg->{mid}));
+ my $mref = $ctx->{-inbox}->msg_by_smsg($smsg) or next;
+ my $h = Email::Simple->new($mref)->header_obj;
+ $gz->write(PublicInbox::Mbox::msg_hdr($ctx, $h, $smsg->{mid}));
+ $gz->write(PublicInbox::Mbox::msg_body($$mref));
+
my $bref = $self->{buf};
if (length($$bref) >= 8192) {
my $ret = $$bref; # copy :<