Mercurial > rlmcintyre

     1 #!C:/strawberry/perl/bin/perl.exe

     2 

     3 # this is an  script calls an external script and avoids caching: 

     4 # NB The CGI::Ajax object must come AFTER the coderefs are declared.

     5 

     6 use strict;

     7 use CGI::Ajax;

     8 use CGI;

     9 

    10 my $q = new CGI;

    11 

    12 my $Show_Form = sub {

    13   my $html = "";

    14   $html .= <<EOT;

    15 <HTML><title>CGI::Ajax No_Cache Example</title>

    16 <HEAD>

    17 </HEAD>

    18 <BODY>

    19 <i>

    20 If the same URL is requested, A browser may cache the result 

    21 and return it without querying the requested URL. To avoid that, use

    22 the 'NO_CACHE' keyword as a parameter in your javascript function.

    23 </i><br/>

    24 <form>

    25 Click the button and a perl script 'pjx_NO_CACHE_callee.pl should

    26 return the current time:<br/><br/>

    27 

    28 <input type="button" id="b1" size="6" value='This will cache (in IE)' onclick="perl_script([], ['out1']);return false"><br/>

    29 

    30 <input type="button" id="b2" size="6" value='This will NOT cache' onclick="perl_script(['NO_CACHE'], ['out1']);"><br/>

    31 

    32 New Time:<input type=text id="out1">

    33 

    34 

    35 </form>

    36 </BODY>

    37 </HTML>

    38 EOT

    39 

    40   return $html;

    41 };

    42 

    43 my $pjx = CGI::Ajax->new( 'perl_script' => 'pjx_NO_CACHE_callee.pl');

    44 $pjx->JSDEBUG(1);

    45 $pjx->DEBUG(1);

    46 print $pjx->build_html($q,$Show_Form); # this outputs the html for the page
author	Robert McIntyre <rlm@mit.edu>
date	Mon, 27 Sep 2010 16:57:26 -0400
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