admin/env_tz_test.pl

   1 #!/usr/bin/perl
   2
   3 use strict;
   4 use warnings;
   5 use CGI;
   6 # use Data::Dumper;
   7
   8 use C4::Context;
   9 use C4::Auth;
  10
  11 my $q = CGI->new();
  12 my ($template, $loggedinuser, $cookie) = get_template_and_user(
  13     {
  14         template_name   => "admin/admin-home.tt", # whatever, we don't really use the template anyway.
  15         query           => $q,
  16         type            => "intranet",
  17         authnotrequired => 0,
  18         flagsrequired   => {parameters => 'parameters_remaining_permissions'},
  19         debug           => 1,
  20     }
  21 );
  22
  23 my $dbh = C4::Context->dbh;
  24 my  $tz_sth = $dbh->prepare("SHOW VARIABLES LIKE 'time_zone'");
  25 $tz_sth->execute();
  26 my $now_sth = $dbh->prepare("SELECT now()");
  27 $now_sth->execute();
  28
  29 print $q->header(),
  30         $q->html(
  31         $q->body(
  32         $q->p("This is a test for debugging purposes.  It isn't supposed to look pretty.")
  33         .
  34         $q->h1("Dumping ENV:")
  35         .
  36         join("\n<br\>", map {"$_ = $ENV{$_}"} sort keys %ENV)
  37         .
  38         $q->h1("Checking different TIME elements in the system:")
  39         . "\n" . $q->p("perl localime: " . localtime)
  40         . "\n" . $q->p( "system(date): " . `date`)
  41         . "\n" . $q->p( "mysql dbh (Context) time_zone : " .  $tz_sth->fetchrow)
  42         . "\n" . $q->p( "mysql dbh (Context) now() : "     . $now_sth->fetchrow)
  43         )), "\n";
  44
  45 __END__
  46
  47 =pod
  48
  49 =head1 MULTIPLE TIME ZONE SUPPORT
  50
  51 Koha supports running multiple instances on the same server, even if they need to be homed
  52 in different timezones.  However, your database must have the timezones installed (see below).
  53
  54 If you are only running one installation of Koha, and want to change the timezone of the server,
  55 please do NOT use this feature at all, and instead set your system timezone via the OS.  If you
  56 are running multiple Kohas, all in the same timezone, do the same.
  57
  58 Only use this feature if
  59 you are running multiple Kohas on the same server, and they are not in the same timezone.
  60
  61 =head2 Perl
  62
  63 For the most part, in execution perl will respect the environmental
  64 variable TZ, if it is set.  This affects calls to localtime() and other similar functions.
  65 Remember that the environment will be different for different users, and for cron jobs.
  66 See the example below.
  67
  68 =head2 Apache2
  69
  70 We affect the running perl code of Koha with the Apache directive:
  71
  72 SetEnv TZ "US/Central"
  73
  74 This should be added inside the VirtualHost definition for the intended Koha instance.  In
  75 almost ALL cases, be sure to set it for both INTRANET and OPAC VirtualHosts.  Remember this
  76 does not affect the command line environment for any terminal sessions, or your cron jobs.
  77
  78 =head2 Database (mysql)
  79
  80 Your MySQL installation must be configured with appropriate time zones.  This extends beyond
  81 Koha and affects mysql itself.  On debian, for example, you can use:
  82
  83         mysql_tzinfo_to_sql /usr/share/zoneinfo | mysql -u root mysql
  84
  85 See http://dev.mysql.com/doc/refman/5.0/en/time-zone-support.html
  86
  87 =head2 cron/crontab
  88
  89 Current versions of cron in debian allow ENV variables to be set in the lines preceeding
  90 scheduled commands.  They will be exported to the environment of the scheduled job.  This is
  91 an example for crontab:
  92
  93         TZ="US/Central"
  94         # m h  dom mon dow   command
  95         0  1 * * *  /home/liblime/kohaclone/misc/cronjobs/overdue_notices.pl
  96         15 * * * *  /home/liblime/kohaclone/misc/cronjobs/process_message_queue.pl
  97         */10 * * * *   /home/liblime/kohaclone/misc/migration_tools/rebuild_zebra.pl -b -z >/dev/null
  98
  99 =head1 EXAMPLE
 100
 101 Try these on a command line to confirm Context is setting time_zone based on TZ:
 102
 103 perl -MC4::Context -e 'my $dbh=C4::Context->dbh; my $tz_sth=$dbh->prepare(q(SHOW VARIABLES LIKE "time_zone"));
 104         $tz_sth->execute(); print "mysql dbh (Context) time_zone : " .  $tz_sth->fetchrow, "\n";'
 105
 106 export TZ="US/Central";  # or any TZ other than the current one.
 107
 108 perl -MC4::Context -e 'my $dbh=C4::Context->dbh; my $tz_sth=$dbh->prepare(q(SHOW VARIABLES LIKE "time_zone"));
 109         $tz_sth->execute(); print "mysql dbh (Context) time_zone : " .  $tz_sth->fetchrow, "\n";'
 110
 111 Then update your VirtualHosts to do, for example:
 112
 113         SetEnv TZ "US/Central"
 114
 115 Reset Apache, then on your intranet check out the debug page:
 116
 117         cgi-bin/koha/admin/env_tz_test.pl
 118
 119 The TZ that Koha has in effect and the TZ from the database should be displayed at the bottom.
 120 Hopefully they match what you set.
 121
 122 =head1 BUGS
 123
 124 WARNING: Multiple timezones may or may not work under mod_perl and mod_perl2.
 125
 126 =head1 AUTHOR
 127
 128         Joe Atzberger
 129         atz at liblime.com
 130
 131 =cut
 132