X-Git-Url: http://git.shiar.nl/sheet.git/blobdiff_plain/c14ff34df0f6e80b747b2f0eef7b30a2deab636d..d96b16650836046f79dc76641681445f97bd60ce:/common.inc.plp
diff --git a/common.inc.plp b/common.inc.plp
index b3a9a70..1e3f30a 100644
--- a/common.inc.plp
+++ b/common.inc.plp
@@ -4,8 +4,10 @@ use strict;
use warnings;
no warnings 'qw'; # you know what you doing
no warnings 'uninitialized'; # save some useless checks for more legible code
-use open IO => ':utf8';
+use open ':std' => ':utf8';
+use File::stat 'stat';
+use HTTP::Date;
use Shiar_Sheet::KeySigns qw(%sign); # dependant on $get{ascii}
our $style;
@@ -32,13 +34,38 @@ sub stylesheet {
return join "\n", map { sprintf(
'',
- $_ eq $style ? 'stylesheet' : 'alternate stylesheet', "/$_.css", $_
+ $_ eq $style ? 'stylesheet' : 'alternate stylesheet', "/$_.css?1.5", $_
) } @_;
}
+sub checkmodified {
+ my $lastmod;
+ for (@_) {
+ my $mod = stat $_ or next;
+ $mod = $mod->mtime or next;
+ $lastmod = $mod if $mod gt $lastmod;
+ }
+
+ for ($ENV{HTTP_IF_MODIFIED_SINCE} || ()) {
+ next if str2time($_) < $lastmod;
+ $header{status} = '304 Same old';
+ exit;
+ }
+
+ $header{'Last-Modified'} = time2str($lastmod);
+}
+
sub Html {
my ($meta) = @_;
+ # announce and check data modification
+ checkmodified(
+ $ENV{SCRIPT_FILENAME},
+ (grep { /\bShiar_/ } values %INC),
+ $meta->{data} ? @{ $meta->{data} } : (),
+ );
+ $header{'Cache-Control'} = sprintf 'max-age: ', 24*60*60;
+
# default fallbacks
$meta->{stylesheet} ||= [qw'light dark circus mono red terse'];
$meta->{charset} ||= 'utf-8';
@@ -85,7 +112,7 @@ EOT
PLP_END {
print <<"EOT";