1 files changed, 8 insertions, 2 deletions
diff --git a/lib/PublicInbox/WwwStatic.pm b/lib/PublicInbox/WwwStatic.pm
index 58db58b4..b8efcf62 100644
--- 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,