HaveJS.pm

   1 # $Id$
   2 # JavaScript detection scriptlet Perl template.
   3 # Copyright (C) 2003-2005 Jan Kratochvil <project-www.jankratochvil.net@jankratochvil.net>
   4 #
   5 # This program is free software; you can redistribute it and/or modify
   6 # it under the terms of the GNU General Public License as published by
   7 # the Free Software Foundation; exactly version 2 of June 1991 is required
   8 #
   9 # This program is distributed in the hope that it will be useful,
  10 # but WITHOUT ANY WARRANTY; without even the implied warranty of
  11 # MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
  12 # GNU General Public License for more details.
  13 #
  14 # You should have received a copy of the GNU General Public License
  15 # along with this program; if not, write to the Free Software
  16 # Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA  02111-1307  USA
  17
  18
  19 package My::HaveJS;
  20 require 5.6.0;  # at least 'use warnings;' but we need some 5.6.0+ modules anyway
  21 our $VERSION=do { my @r=(q$Revision$=~/\d+/g); sprintf "%d.".("%03d"x$#r),@r; };
  22 our $CVS_ID=q$Id$;
  23 use strict;
  24 use warnings;
  25
  26 use My::Web;
  27
  28
  29 our $HTML_TEST="download";
  30
  31 sub handler
  32 {
  33 my $W=My::Web->init(
  34                 "header_only"=>1,
  35                 # Do not: text/javascript
  36                 # as it does not look as registered, at least according to: MIME::Types $VERSION 1.15
  37                 # "application/javascript" so far standardized till 2005-12-08 by:
  38                 #       http://www.ietf.org/internet-drafts/draft-hoehrmann-script-types-03.txt
  39                 "content_type"=>"application/javascript",
  40                 );
  41 My::Web->heading();
  42
  43
  44 # Prevent redirection of some top (referring) foreign webpage as it
  45 # may not pass "have_js=1" to us anyway. (for example Google cache)
  46 print ""
  47                 .'if (0'."\n"
  48                 ."\t\t".'|| window.location.hostname=="'.$W->{"web_hostname"}.'" && window.location.port==  80'."\n"
  49                 ."\t\t".'|| window.location.hostname=="'.'localhost'         .'" && window.location.port==7680)'."\n";
  50 print <<'HERE';
  51         {
  52                 var searchN=window.location.search;
  53                 if (searchN=="" || searchN=="?")
  54                         searchN="?";
  55                 else
  56                         searchN+="&";
  57                 searchN+="have_js=1";
  58
  59                 window.location.href
  60                                 =window.location.protocol+"//"
  61                                 +window.location.hostname
  62                                 +(window.location.port==80 ? "" : ":"+window.location.port)
  63                                 +window.location.pathname
  64                                 +window.location.hash
  65                                 +searchN;
  66                 }
  67 HERE
  68
  69
  70 exit;
  71 }
  72 1;