-# Copyright (C) 2016 all contributors <meta@public-inbox.org>
+# Copyright (C) 2016-2018 all contributors <meta@public-inbox.org>
# License: AGPL-3.0+ <https://www.gnu.org/licenses/agpl-3.0.txt>
# when no endpoints match, fallback to this and serve a static file
-# or smart HTTP
+# or smart HTTP. This is our wrapper for git-http-backend(1)
package PublicInbox::GitHTTPBackend;
use strict;
use warnings;
sub serve {
my ($env, $git, $path) = @_;
+ # XXX compatibility... ugh, can we stop supporting this?
+ $git = PublicInbox::Git->new($git) unless ref($git);
+
# Documentation/technical/http-protocol.txt in git.git
# requires one and exactly one query parameter:
if ($env->{QUERY_STRING} =~ /\Aservice=git-\w+-pack\z/ ||
return r(404);
}
- my $f = (ref $git ? $git->{git_dir} : $git) . '/' . $path;
+ my $f = $git->{git_dir} . '/' . $path;
return r(404) unless -f $f && -r _; # just in case it's a FIFO :P
my $size = -s _;
my $val = $env->{$name};
$env{$name} = $val if defined $val;
}
- my ($git_dir, $limiter);
- if (ref $git) {
- $limiter = $git->{-httpbackend_limiter} || $default_limiter;
- $git_dir = $git->{git_dir};
- } else {
- $limiter = $default_limiter;
- $git_dir = $git;
- }
+ my $limiter = $git->{-httpbackend_limiter} || $default_limiter;
$env{GIT_HTTP_EXPORT_ALL} = '1';
- $env{PATH_TRANSLATED} = "$git_dir/$path";
- my %rdr = ( 0 => fileno($in) );
- my $x = PublicInbox::Qspawn->new([qw(git http-backend)], \%env, \%rdr);
- my ($fh, $rpipe);
- my $end = sub {
- if (my $err = $x->finish) {
- err($env, "git http-backend ($git_dir): $err");
- }
- $fh->close if $fh; # async-only
- };
-
- # Danga::Socket users, we queue up the read_enable callback to
- # fire after pending writes are complete:
- my $buf = '';
- my $rd_hdr = sub {
- my $r = sysread($rpipe, $buf, 1024, length($buf));
- return if !defined($r) && ($!{EINTR} || $!{EAGAIN});
- return r(500, 'http-backend error') unless $r;
- $r = parse_cgi_headers(\$buf) or return; # incomplete headers
+ $env{PATH_TRANSLATED} = "$git->{git_dir}/$path";
+ my $rdr = { 0 => fileno($in) };
+ my $qsp = PublicInbox::Qspawn->new([qw(git http-backend)], \%env, $rdr);
+ $qsp->psgi_return($env, $limiter, sub {
+ my ($r, $bref) = @_;
+ $r = parse_cgi_headers($bref) or return; # incomplete headers
$r->[0] == 403 ? serve_dumb($env, $git, $path) : $r;
- };
- my $res;
- my $async = $env->{'pi-httpd.async'}; # XXX unstable API
- my $io = $env->{'psgix.io'};
- my $cb = sub {
- my $r = $rd_hdr->() or return;
- $rd_hdr = undef;
- if (scalar(@$r) == 3) { # error:
- if ($async) {
- $async->close; # calls rpipe->close
- } else {
- $rpipe->close;
- $end->();
- }
- return $res->($r);
- }
- if ($async) {
- $fh = $res->($r);
- return $async->async_pass($io, $fh, \$buf);
- }
-
- # for synchronous PSGI servers
- require PublicInbox::GetlineBody;
- $r->[2] = PublicInbox::GetlineBody->new($rpipe, $end, $buf);
- $res->($r);
- };
- sub {
- ($res) = @_;
-
- # hopefully this doesn't break any middlewares,
- # holding the input here is a waste of FDs and memory
- $env->{'psgi.input'} = undef;
-
- $x->start($limiter, sub { # may run later, much later...
- ($rpipe) = @_;
- $in = undef;
- if ($async) {
- $async = $async->($rpipe, $cb, $end);
- } else { # generic PSGI
- $cb->() while $rd_hdr;
- }
- });
- };
+ });
}
sub input_to_file {
err($env, "error reading input: $!");
return;
}
+ last if $r == 0;
my $off = 0;
while ($r > 0) {
my $w = syswrite($in, $buf, $r, $off);