Packages::Dispatcher: Refine the Last-Modified logic

Allow some fudge around the cron job run to minimize the
risk that people get to view outdated data.

Also the test should be <= and not <

diff --git a/lib/Packages/Dispatcher.pm b/lib/Packages/Dispatcher.pm
index 986b12a92212b3acbecb4dc951519c8c15a35482..a90c47ff55646df4b82d7fcf8de489ead2d54a0e 100755 (executable)
--- a/lib/Packages/Dispatcher.pm
+++ b/lib/Packages/Dispatcher.pm
@@ -92,10 +92,15 @@ sub do_dispatch {
     my $homedir = dirname($ENV{SCRIPT_FILENAME}).'/../';
     &Packages::Config::init( $homedir );
     &Packages::DB::init();
+    my $last_modified = $Packages::DB::db_read_time;
+    my $now = time;
+    # allow some fudge, since the db mod time is not the end of
+    # the cron job
+    $last_modified = $now if $last_modified - $now < 3600; 
 
     if ($input->http('If-Modified-Since') and
        (my $modtime = str2time($input->http('If-Modified-Since'), 'UTC'))) {
-       if ($modtime < $Packages::DB::db_read_time) {
+       if ($modtime <= $last_modified) {
            print $input->header(-status => 304);
            exit;
        }
@@ -344,7 +349,7 @@ sub do_dispatch {
                             -type => get_mime($opts{format}),
                             -vary => 'negotiate,accept-language',
                             -last_modified => strftime("%a, %d %b %Y %T %z",
-                                                       localtime($Packages::DB::db_read_time)),
+                                                       localtime($last_modified)),
                             );
        #use Data::Dumper;
        #print '<pre>'.Dumper(\%ENV, \%page_content, get_all_messages()).'</pre>';