admin/env_tz_test.pl

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