wwwstatic: implement Last-Modified and If-Modified-Since

[public-inbox.git] / lib / PublicInbox / WwwStatic.pm

diff --git a/lib/PublicInbox/WwwStatic.pm b/lib/PublicInbox/WwwStatic.pm
index 58db58b4e76755aac5ae8ad4f5d944865858d401..b8efcf625a184d03507161f570787f4547032f7a 100644 (file)
--- a/lib/PublicInbox/WwwStatic.pm
+++ b/lib/PublicInbox/WwwStatic.pm
@@ -4,6 +4,7 @@
 package PublicInbox::WwwStatic;
 use strict;
 use Fcntl qw(:seek);
+use HTTP::Date qw(time2str);
 
 sub prepare_range {
        my ($env, $in, $h, $beg, $end, $size) = @_;
@@ -50,9 +51,14 @@ sub response {
        my ($env, $h, $path, $type) = @_;
        return unless -f $path && -r _; # just in case it's a FIFO :P
 
-       # TODO: If-Modified-Since and Last-Modified?
        open my $in, '<', $path or return;
        my $size = -s $in;
+       my $mtime = time2str((stat(_))[9]);
+
+       if (my $ims = $env->{HTTP_IF_MODIFIED_SINCE}) {
+               return [ 304, [], [] ] if $mtime eq $ims;
+       }
+
        my $len = $size;
        my $code = 200;
        push @$h, 'Content-Type', $type;
@@ -63,7 +69,7 @@ sub response {
                        return [ 416, $h, [] ];
                }
        }
-       push @$h, 'Content-Length', $len;
+       push @$h, 'Content-Length', $len, 'Last-Modified', $mtime;
        my $body = bless {
                initial_rd => 65536,
                len => $len,