demo.php

   1 <?php
   2
   3 // major TODO: hook into some sort of templating system that utilizes
   4 // XHTML Compiler to process the template (cacheable, of course), before
   5 // passing it along to this script
   6
   7 // using _REQUEST because we accept GET and POST requests
   8
   9 function getFormMethod() {
  10     return (isset($_REQUEST['post'])) ? 'post' : 'get';
  11 }
  12 function escapeHTML($html) {
  13     return htmlspecialchars(
  14         HTMLPurifier_Encoder::cleanUTF8($html), ENT_COMPAT, 'UTF-8');
  15 }
  16 function isLocal() {
  17     return file_exists('xhtml-compiler/local.txt');
  18 }
  19
  20 if (!isLocal()) {
  21     require_once 'live/library/HTMLPurifier.auto.php';
  22 } else {
  23     // local dev
  24     require_once '../htmlpurifier/library/HTMLPurifier.auto.php';
  25 }
  26 require_once 'HTMLPurifier/Printer/ConfigForm.php';
  27
  28 $allowed_lite = array(
  29     'Core.CollectErrors',
  30     'URI.DisableExternalResources',
  31     'URI.Munge',
  32     'HTML.TidyLevel',
  33     'HTML.Doctype',
  34     'HTML.Allowed',
  35     'CSS',
  36     'AutoFormat',
  37     '-AutoFormat.Custom',
  38     '-AutoFormat.PurifierLinkify',
  39 );
  40
  41 $config = HTMLPurifier_Config::loadArrayFromForm($_REQUEST, 'filter', $allowed_lite);
  42
  43 if (!empty($_REQUEST['strict'])) {
  44     // backwards-compatibility
  45     $config->set('HTML', 'Strict', true);
  46 }
  47
  48 $definition = $config->getHTMLDefinition();
  49 $doctype = $definition->doctype;
  50
  51 if ($doctype->xml && stripos($_SERVER["HTTP_ACCEPT"], 'application/xhtml+xml') !== false && !isset($_REQUEST['debug'])) {
  52     $type = 'application/xhtml+xml';
  53 } else {
  54     $type = 'text/html';
  55 }
  56 header("Content-type:$type;charset=UTF-8");
  57
  58 // prevent PHP versions with shorttags from barfing
  59 if ($doctype->xml) {
  60     echo '<?xml version="1.0" encoding="UTF-8" ?>' . PHP_EOL;
  61 }
  62
  63 if (!empty($doctype->dtdPublic) && !empty($doctype->dtdSystem)) {
  64     echo '<!DOCTYPE html PUBLIC "'.$doctype->dtdPublic.'" "'.$doctype->dtdSystem.'">' . PHP_EOL;
  65 }
  66
  67 if ($doctype->xml) {
  68     echo '<html xmlns="http://www.w3.org/1999/xhtml" lang="en" xml:lang="en">' . PHP_EOL;
  69     $END = ' /';
  70 } else {
  71     echo '<html lang="en">' . PHP_EOL;
  72     $END = '';
  73 }
  74
  75 ?><head>
  76     <title>HTML Purifier Live Demo</title>
  77     <!-- make sure all empty elements that are not generated are
  78      appropriately ended -->
  79     <meta name="author" content="Edward Z. Yang"<?php echo $END; ?>>
  80     <meta http-equiv="Content-Type" content="text/html; charset=UTF-8"<?php echo $END; ?>>
  81     <link rel="icon" href="favicon.ico" type="image/x-icon"<?php echo $END; ?>>
  82     <link rel="shortcut icon" href="favicon.ico" type="image/x-icon"<?php echo $END; ?>>
  83     <link rel="stylesheet" href="common.css" type="text/css"<?php echo $END; ?>>
  84     <link rel="stylesheet" href="demo.css" type="text/css"<?php echo $END; ?>>
  85     <link rel="stylesheet" href="live/library/HTMLPurifier/Printer/ConfigForm.css" type="text/css"<?php echo $END; ?>>
  86     <script defer="defer" type="text/javascript" src="live/library/HTMLPurifier/Printer/ConfigForm.js"></script>
  87 </head>
  88 <body>
  89 <div id="logo"></div>
  90 <div id="header"><a href=".">HTML Purifier</a></div>
  91 <?php readfile('navigation.frag'); ?>
  92 <h1 id="title">Live Demo</h1>
  93 <div id="alt-content">
  94 <?php
  95
  96 if (!empty($_REQUEST['html'])) { // start result
  97
  98     if (strlen($_REQUEST['html']) > 50000) {
  99         ?>
 100         <p>Request exceeds maximum allowed text size of 50kb.</p>
 101         <?php
 102     } else { // start main processing
 103
 104     $html = get_magic_quotes_gpc() ? stripslashes($_REQUEST['html']) : $_REQUEST['html'];
 105     $purifier = new HTMLPurifier($config);
 106     $pure_html = $purifier->purify($html);
 107
 108 ?>
 109 <p>Here is your purified HTML:</p>
 110 <div id="output">
 111 <?php if(getFormMethod() == 'get') {
 112 // calculate image
 113 $img = false;
 114 if ($doctype->name == 'HTML 4.01 Transitional' || $doctype->name == 'HTML 4.01 Strict') {
 115     $img = 'http://www.w3.org/Icons/valid-html401';
 116 } elseif ($doctype->name == 'XHTML 1.0 Transitional' || $doctype->name == 'XHTML 1.0 Strict') {
 117     $img = 'http://www.w3.org/Icons/valid-xhtml10';
 118 } elseif ($doctype->name == 'XHTML 1.1') {
 119     $img = 'http://www.w3.org/Icons/valid-xhtml11';
 120 }
 121 ?>
 122   <div id="w3c-validator">
 123     <a href="http://validator.w3.org/check?uri=referer" title="Valid <?php echo escapeHTML($doctype->name); ?>">
 124     <?php if ($img) { ?>
 125       <img
 126         src="<?php echo escapeHTML($img); ?>" height="31" width="88"
 127         alt="Valid <?php echo escapeHTML($doctype->name); ?>"<?php echo $END; ?>>
 128     <?php } else { ?>
 129       Valid <?php echo escapeHTML($doctype->name); ?>
 130     <?php } ?>
 131     </a>
 132   </div>
 133 <?php } ?>
 134 <?php
 135
 136 echo $pure_html;
 137
 138 ?>
 139 <div class="clear"></div>
 140 </div>
 141 <?php if ($config->get('Core', 'CollectErrors')) {
 142     $e = $purifier->context->get('ErrorCollector');
 143     $class = $e->getRaw() ? 'fail' : 'pass';
 144 ?>
 145     <p>Here are errors that occurred during purification:</p>
 146     <div id="errors" class="<?php echo $class ?>">
 147     <?php
 148     echo $e->getHTMLFormatted($config);
 149     ?>
 150 </div>
 151 <?php } ?>
 152 <p>Here is the source code of the purified HTML:</p>
 153 <pre id="source"><?php echo escapeHTML($pure_html); ?></pre>
 154 <?php
 155 if (getFormMethod() == 'post') { // start POST validation notice
 156 ?>
 157     <p>If you would like to validate the code with
 158     <a href="http://validator.w3.org/#validate-by-input">W3C's
 159     validator</a>, copy and paste the <em>entire</em> demo page's source.</p>
 160 <?php
 161 } // end POST validation notice
 162
 163 } // end main processing
 164
 165 // end result
 166 } else {
 167
 168 ?>
 169 <p>Welcome to the live demo.  Enter some HTML and see how HTML Purifier
 170 will filter it.</p>
 171 <?php
 172
 173 }
 174
 175 ?>
 176 <form id="filter" action="demo.php<?php
 177 echo '?' . getFormMethod();
 178 if (isset($_REQUEST['profile']) || isset($_REQUEST['XDEBUG_PROFILE'])) {
 179     echo '&amp;XDEBUG_PROFILE=1';
 180 } ?>" method="<?php echo getFormMethod();  ?>">
 181     <fieldset>
 182         <legend>HTML Purifier Input (<?php echo getFormMethod(); ?>)</legend>
 183
 184         <?php
 185 $form_printer = new HTMLPurifier_Printer_ConfigForm('filter', 'http://htmlpurifier.org/live/configdoc/plain.html#%s', 14);
 186 echo $form_printer->render($config, $allowed_lite, false);
 187         ?>
 188
 189         <div id="textarea">
 190         <textarea name="html" cols="60" rows="15"><?php
 191 if (isset($html)) echo escapeHTML($html);
 192         ?></textarea>
 193         </div>
 194
 195         <?php if (getFormMethod() == 'get') { ?>
 196             <p><strong>Warning:</strong> GET request method can only hold
 197                 8129 characters (probably less depending on your browser).
 198                 If you need to test anything
 199                 larger than that, try the <a href="?post">POST form</a>.</p>
 200         <?php } ?>
 201         <div>
 202             <input type="submit" value="Submit" name="submit" class="button"<?php echo $END; ?>>
 203         </div>
 204     </fieldset>
 205 </form>
 206 <p>Try the form in <a href="?get">GET</a> and <a href="?post">POST</a> request
 207 flavors (GET is easy to validate with W3C, but POST allows larger inputs).
 208 Don't know what to test? Try out these sample filterings:</p>
 209 <ul>
 210     <li><a href="demo.php?html=%3Cimg+src%3D%22javascript%3Aevil%28%29%3B%22+onload%3D%22evil%28%29%3B%22+%2F%3E">Malicious code removed</a></li>
 211     <li><a href="demo.php?html=%3Cb%3EBold&amp;submit=Submit">Missing end tags fixed</a></li>
 212     <li><a href="demo.php?html=%3Cb%3EInline+%3Cdel%3Econtext+%3Cdiv%3ENo+block+allowed%3C%2Fdiv%3E%3C%2Fdel%3E%3C%2Fb%3E&amp;submit=Submit">Illegal nesting fixed</a></li>
 213     <li><a href="demo.php?html=%3Ccenter%3ECentered%3C%2Fcenter%3E&amp;filter%5BHTML.Doctype%5D=XHTML+1.0+Strict&amp;submit=Submit">Deprecated tags converted</a></li>
 214     <li><a href="demo.php?html=%3Cspan+style%3D%22color%3A%23COW%3Bfloat%3Aaround%3Btext-decoration%3Ablink%3B%22%3EText%3C%2Fspan%3E&amp;submit=Submit"><abbr>CSS</abbr> validated</a></li>
 215     <li><a href="demo.php?html=%3Ctable%3E%0D%0A++%3Ccaption%3E%0D%0A++++Cool+table%0D%0A++%3C%2Fcaption%3E%0D%0A++%3Ctfoot%3E%0D%0A++++%3Ctr%3E%0D%0A++++++%3Cth%3EI+can+do+so+much%21%3C%2Fth%3E%0D%0A++++%3C%2Ftr%3E%0D%0A++%3C%2Ftfoot%3E%0D%0A++%3Ctr%3E%0D%0A++++%3Ctd+style%3D%22font-size%3A16pt%3B%0D%0A++++++color%3A%23F00%3Bfont-family%3Asans-serif%3B%0D%0A++++++text-align%3Acenter%3B%22%3EWow%3C%2Ftd%3E%0D%0A++%3C%2Ftr%3E%0D%0A%3C%2Ftable%3E&amp;submit=Submit">Rich formatting preserved</a></li>
 216 </ul>
 217 </div>
 218 </body>
 219 </html>