X-Git-Url: http://www.git.stargrave.org/?a=blobdiff_plain;f=lib%2FPublicInbox%2FWwwAtomStream.pm;h=3b5b133a5ec0b707b0b123a6d3e842138c8fa865;hb=5afb24f06627641e3fed608e807b5ab628cda348;hp=9f322d38f32a5f992466abe0cfede96c58dd5fcc;hpb=703f4c711bfe82e94c9b760f73ed89cfba3d00fc;p=public-inbox.git

diff --git a/lib/PublicInbox/WwwAtomStream.pm b/lib/PublicInbox/WwwAtomStream.pm
index 9f322d38..3b5b133a 100644
--- a/lib/PublicInbox/WwwAtomStream.pm
+++ b/lib/PublicInbox/WwwAtomStream.pm
@@ -1,56 +1,63 @@
 # Copyright (C) 2016-2020 all contributors <meta@public-inbox.org>
 # License: AGPL-3.0+ <https://www.gnu.org/licenses/agpl-3.0.txt>
 #
-# Atom body stream for which yields getline+close methods
-# 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)
+# Atom body stream for HTTP responses
+# See PublicInbox::GzipFilter for details.
 package PublicInbox::WwwAtomStream;
 use strict;
-use warnings;
+use parent 'PublicInbox::GzipFilter';
 
 use POSIX qw(strftime);
 use Digest::SHA qw(sha1_hex);
 use PublicInbox::Address;
 use PublicInbox::Hval qw(ascii_html mid_href);
 use PublicInbox::MsgTime qw(msg_timestamp);
-use PublicInbox::GzipFilter qw(gzf_maybe);
-
-# called by PSGI server after getline:
-sub close {}
 
 sub new {
 	my ($class, $ctx, $cb) = @_;
 	$ctx->{feed_base_url} = $ctx->{-inbox}->base_url($ctx->{env});
-	$ctx->{cb} = $cb || \&close;
+	$ctx->{cb} = $cb || \&PublicInbox::GzipFilter::close;
 	$ctx->{emit_header} = 1;
 	bless $ctx, $class;
 }
 
+sub async_next ($) {
+	my ($http) = @_; # PublicInbox::HTTP
+	my $ctx = $http->{forward} or return;
+	eval {
+		if (my $smsg = $ctx->{smsg} = $ctx->{cb}->($ctx)) {
+			$ctx->smsg_blob($smsg);
+		} else {
+			$ctx->{http_out}->write($ctx->translate('</feed>'));
+			$ctx->close;
+		}
+	};
+	warn "E: $@" if $@;
+}
+
+sub async_eml { # ->{async_eml} for async_blob_cb
+	my ($ctx, $eml) = @_;
+	my $smsg = delete $ctx->{smsg};
+	$ctx->{http_out}->write($ctx->translate(feed_entry($ctx, $smsg, $eml)))
+}
+
 sub response {
 	my ($class, $ctx, $code, $cb) = @_;
-	my $h = [ 'Content-Type' => 'application/atom+xml' ];
+	my $res_hdr = [ 'Content-Type' => 'application/atom+xml' ];
 	$class->new($ctx, $cb);
-	$ctx->{gzf} = gzf_maybe($h, $ctx->{env});
-	[ $code, $h, $ctx ]
+	$ctx->psgi_response($code, $res_hdr, \&async_next, \&async_eml);
 }
 
 # called once for each message by PSGI server
 sub getline {
 	my ($self) = @_;
-	my $buf = do {
-		if (my $middle = $self->{cb}) {
-			my $smsg = $middle->($self);
-			feed_entry($self, $smsg) if $smsg;
-		}
-	} // (delete($self->{cb}) ? '</feed>' : undef);
-
-	# gzf may be GzipFilter, `undef' or `0'
-	my $gzf = $self->{gzf} or return $buf;
-
-	return $gzf->translate($buf) if defined $buf;
-	$self->{gzf} = 0; # next call to ->getline returns $buf (== undef)
-	$gzf->translate(undef);
+	my $cb = $self->{cb} or return;
+	while (my $smsg = $cb->($self)) {
+		my $eml = $self->{-inbox}->smsg_eml($smsg) or next;
+		return $self->translate(feed_entry($self, $smsg, $eml));
+	}
+	delete $self->{cb};
+	$self->zflush('</feed>');
 }
 
 # private
@@ -108,8 +115,7 @@ sub atom_header {
 
 # returns undef or string
 sub feed_entry {
-	my ($ctx, $smsg) = @_;
-	my $eml = $ctx->{-inbox}->smsg_eml($smsg) or return '';
+	my ($ctx, $smsg, $eml) = @_;
 	my $hdr = $eml->header_obj;
 	my $mid = $smsg->{mid};
 	my $irt = PublicInbox::View::in_reply_to($hdr);