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# This is nix-serve (https://github.com/edolstra/nix-serve) using pxz instead of bzip2
use MIME::Base64;
use Nix::Config;
use Nix::Manifest;
use Nix::Store;
use Nix::Utils;
use strict;
sub stripPath {
my ($x) = @_;
$x =~ s/.*\///; $x
}
my $app = sub {
my $env = shift;
my $path = $env->{PATH_INFO};
if ($path eq "/nix-cache-info") {
return [200, ['Content-Type' => 'text/plain'], ["StoreDir: $Nix::Config::storeDir\nWantMassQuery: 1\nPriority: 30\n"]];
}
elsif ($path =~ "/([0-9a-z]+)\.narinfo") {
my $hashPart = $1;
my $storePath = queryPathFromHashPart($hashPart);
return [404, ['Content-Type' => 'text/plain'], ["No such path.\n"]] unless $storePath;
my ($deriver, $narHash, $time, $narSize, $refs) = queryPathInfo($storePath, 1) or die;
my $res =
"StorePath: $storePath\n" .
"URL: nar/$hashPart.nar.xz\n" .
"Compression: xz\n" .
"NarHash: $narHash\n" .
"NarSize: $narSize\n";
$res .= "References: " . join(" ", map { stripPath($_) } @$refs) . "\n"
if scalar @$refs > 0;
$res .= "Deriver: " . stripPath($deriver) . "\n" if defined $deriver;
my $secretKeyFile = $ENV{'NIX_SECRET_KEY_FILE'};
if (defined $secretKeyFile) {
my $s = readFile $secretKeyFile;
chomp $s;
my ($keyName, $secretKey) = split ":", $s;
die "invalid secret key file ‘$secretKeyFile’\n" unless defined $keyName && defined $secretKey;
my $fingerprint = fingerprintPath($storePath, $narHash, $narSize, $refs);
my $sig = encode_base64(signString(decode_base64($secretKey), $fingerprint), "");
$res .= "Sig: $keyName:$sig\n";
}
return [200, ['Content-Type' => 'text/x-nix-narinfo'], [$res]];
}
elsif ($path =~ "/nar/([0-9a-z]+)\.nar.xz") {
my $hashPart = $1;
my $storePath = queryPathFromHashPart($hashPart);
return [404, ['Content-Type' => 'text/plain'], ["No such path.\n"]] unless $storePath;
my $fh = new IO::Handle;
open $fh, "nix-store --dump '$storePath' | nice -n 19 pxz -0 |";
return [200, ['Content-Type' => 'application/x-xz'], $fh];
}
else {
return [404, ['Content-Type' => 'text/plain'], ["File not found.\n"]];
}
}
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