+# returns undef if 403 so it falls back to dumb HTTP
+sub serve_smart {
+ my ($cgi, $git, $path) = @_;
+ my $env = $cgi->{env};
+
+ my $input = $env->{'psgi.input'};
+ my $buf;
+ my $in;
+ my $err = $env->{'psgi.errors'};
+ if (fileno($input) >= 0) { # FIXME untested
+ $in = $input;
+ } else {
+ $in = IO::File->new_tmpfile;
+ while (1) {
+ my $r = $input->read($buf, 8192);
+ unless (defined $r) {
+ $err->print('error reading input: ', $!, "\n");
+ return r(500);
+ }
+ last if ($r == 0);
+ $in->write($buf);
+ }
+ $in->flush;
+ $in->sysseek(0, SEEK_SET);
+ }
+ my $out = IO::File->new_tmpfile;
+ my $pid = fork; # TODO: vfork under Linux...
+ unless (defined $pid) {
+ $err->print('error forking: ', $!, "\n");
+ return r(500);
+ }
+ if ($pid == 0) {
+ # GIT_HTTP_EXPORT_ALL, GIT_COMMITTER_NAME, GIT_COMMITTER_EMAIL
+ # may be set in the server-process and are passed as-is
+ foreach my $name (qw(QUERY_STRING
+ REMOTE_USER REMOTE_ADDR
+ HTTP_CONTENT_ENCODING
+ CONTENT_TYPE
+ SERVER_PROTOCOL
+ REQUEST_METHOD)) {
+ my $val = $env->{$name};
+ $ENV{$name} = $val if defined $val;
+ }
+ # $ENV{GIT_PROJECT_ROOT} = $git->{git_dir};
+ $ENV{GIT_HTTP_EXPORT_ALL} = '1';
+ $ENV{PATH_TRANSLATED} = "$git->{git_dir}/$path";
+ dup2(fileno($in), 0) or die "redirect stdin failed: $!\n";
+ dup2(fileno($out), 1) or die "redirect stdout failed: $!\n";
+ my @cmd = qw(git http-backend);
+ exec(@cmd) or die 'exec `' . join(' ', @cmd). "' failed: $!\n";
+ }
+
+ if (waitpid($pid, 0) != $pid) {
+ $err->print("git http-backend ($git->{git_dir}): ", $?, "\n");
+ return r(500);
+ }
+ $in = undef;
+ $out->seek(0, SEEK_SET);
+ my @h;
+ my $code = 200;
+ {
+ local $/ = "\r\n";
+ while (defined(my $line = <$out>)) {
+ if ($line =~ /\AStatus:\s*(\d+)/) {
+ $code = $1;
+ } else {
+ chomp $line;
+ last if $line eq '';
+ push @h, split(/:\s*/, $line, 2);
+ }
+ }
+ }
+ return if $code == 403;
+ sub {
+ my ($cb) = @_;
+ my $fh = $cb->([ $code, \@h ]);
+ while (1) {
+ my $r = $out->read($buf, 8192);
+ die "$!\n" unless defined $r;
+ last if ($r == 0);
+ $fh->write($buf);
+ }
+ $fh->close;
+ }
+}
+