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     static $name = false;
  18     if (!$name) {
  19         if (file_exists($dir = 'xhtml-compiler/conf/name.txt')) {
  20             $name = trim(file_get_contents($dir));
  21         } elseif (file_exists('xhtml-compiler/local.txt')) {
  22             $name = 'EZYANG';
  23         }
  24     }
  25     return $name == 'EZYANG' || $name == 'EZYANG2';
  26 }
  27
  28 if (empty($_REQUEST['experimental'])) {
  29     require_once 'live/library/HTMLPurifier.auto.php';
  30 } elseif (!isLocal()) {
  31     require_once 'dev/library/HTMLPurifier.auto.php';
  32 } else {
  33     require_once '../htmlpurifier/library/HTMLPurifier.auto.php';
  34 }
  35 require_once 'HTMLPurifier/Printer/ConfigForm.php';
  36
  37 $allowed_lite = array(
  38     'Core.CollectErrors',
  39     'URI.DisableExternalResources',
  40     'URI.Munge',
  41     'HTML.TidyLevel',
  42     'HTML.Doctype',
  43     'HTML.Allowed',
  44     'CSS',
  45     'AutoFormat',
  46     '-AutoFormat.Custom',
  47     '-AutoFormat.PurifierLinkify',
  48 );
  49
  50 $config = HTMLPurifier_Config::loadArrayFromForm($_REQUEST, 'filter', $allowed_lite);
  51 $purifier = new HTMLPurifier($config);
  52
  53 if (!empty($_REQUEST['strict'])) {
  54     // backwards-compatibility
  55     $config->set('HTML', 'Strict', true);
  56 }
  57 if (!empty($_REQUEST['experimental'])) {
  58     require_once 'HTMLPurifier/Lexer/PH5P.php';
  59     $config->set('Core', 'LexerImpl', 'PH5P');
  60 }
  61
  62 if (file_exists('demo.custom.php') && isLocal()) include 'demo.custom.php';
  63
  64 $definition = $config->getHTMLDefinition();
  65 $doctype = $definition->doctype;
  66
  67 if ($doctype->xml && stripos($_SERVER["HTTP_ACCEPT"], 'application/xhtml+xml') !== false && !isset($_REQUEST['debug'])) {
  68     $type = 'application/xhtml+xml';
  69 } else {
  70     $type = 'text/html';
  71 }
  72 header("Content-type:$type;charset=UTF-8");
  73
  74 // prevent PHP versions with shorttags from barfing
  75 if ($doctype->xml) {
  76     echo '<?xml version="1.0" encoding="UTF-8" ?>' . PHP_EOL;
  77 }
  78
  79 if (!empty($doctype->dtdPublic) && !empty($doctype->dtdSystem)) {
  80     echo '<!DOCTYPE html PUBLIC "'.$doctype->dtdPublic.'" "'.$doctype->dtdSystem.'">' . PHP_EOL;
  81 }
  82
  83 if ($doctype->xml) {
  84     echo '<html xmlns="http://www.w3.org/1999/xhtml" lang="en" xml:lang="en">' . PHP_EOL;
  85     $END = ' /';
  86 } else {
  87     echo '<html lang="en">' . PHP_EOL;
  88     $END = '';
  89 }
  90
  91 ?><head>
  92     <title>HTML Purifier Live Demo</title>
  93     <!-- make sure all empty elements that are not generated are
  94      appropriately ended -->
  95     <meta name="author" content="Edward Z. Yang"<?php echo $END; ?>>
  96     <meta http-equiv="Content-Type" content="text/html; charset=UTF-8"<?php echo $END; ?>>
  97     <link rel="icon" href="favicon.ico" type="image/x-icon"<?php echo $END; ?>>
  98     <link rel="shortcut icon" href="favicon.ico" type="image/x-icon"<?php echo $END; ?>>
  99     <link rel="stylesheet" href="common.css" type="text/css"<?php echo $END; ?>>
 100     <link rel="stylesheet" href="demo.css" type="text/css"<?php echo $END; ?>>
 101     <link rel="stylesheet" href="live/library/HTMLPurifier/Printer/ConfigForm.css" type="text/css"<?php echo $END; ?>>
 102     <script defer="defer" type="text/javascript" src="live/library/HTMLPurifier/Printer/ConfigForm.js"></script>
 103 </head>
 104 <body>
 105 <div id="logo"></div>
 106 <div id="header"><a href=".">HTML Purifier</a></div>
 107 <?php
 108 if (file_exists('navigation.frag')) {
 109     readfile('navigation.frag');
 110 } else { ?>
 111     <div><strong>Please navigate to <a href="navigation.html">navigation.html</a> to regenerate menu</strong></div>
 112 <?php }
 113 ?>
 114 <h1 id="title">Live Demo</h1>
 115 <div id="alt-content">
 116 <?php
 117
 118 if (!empty($_REQUEST['html'])) { // start result
 119
 120     if (strlen($_REQUEST['html']) > 50000) {
 121         ?>
 122         <p>Request exceeds maximum allowed text size of 50kb.</p>
 123         <?php
 124     } else { // start main processing
 125
 126     $html = get_magic_quotes_gpc() ? stripslashes($_REQUEST['html']) : $_REQUEST['html'];
 127     $pure_html = $purifier->purify($html);
 128
 129 ?>
 130 <p>Here is your purified HTML:</p>
 131 <div id="output">
 132 <?php if(getFormMethod() == 'get') {
 133 // calculate image
 134 $img = false;
 135 if ($doctype->name == 'HTML 4.01 Transitional' || $doctype->name == 'HTML 4.01 Strict') {
 136     $img = 'http://www.w3.org/Icons/valid-html401';
 137 } elseif ($doctype->name == 'XHTML 1.0 Transitional' || $doctype->name == 'XHTML 1.0 Strict') {
 138     $img = 'http://www.w3.org/Icons/valid-xhtml10';
 139 } elseif ($doctype->name == 'XHTML 1.1') {
 140     $img = 'http://www.w3.org/Icons/valid-xhtml11';
 141 }
 142 ?>
 143   <div id="w3c-validator">
 144     <a href="http://validator.w3.org/check?uri=referer" title="Valid <?php echo escapeHTML($doctype->name); ?>">
 145     <?php if ($img) { ?>
 146       <img
 147         src="<?php echo escapeHTML($img); ?>" height="31" width="88"
 148         alt="Valid <?php echo escapeHTML($doctype->name); ?>"<?php echo $END; ?>>
 149     <?php } else { ?>
 150       Valid <?php echo escapeHTML($doctype->name); ?>
 151     <?php } ?>
 152     </a>
 153   </div>
 154 <?php } ?>
 155 <?php
 156
 157 echo $pure_html;
 158
 159 ?>
 160 <div class="clear"></div>
 161 </div>
 162 <?php if ($config->get('Core', 'CollectErrors')) {
 163     $e = $purifier->context->get('ErrorCollector');
 164     $class = $e->getRaw() ? 'fail' : 'pass';
 165 ?>
 166     <p>Here are errors that occurred during purification:</p>
 167     <div id="errors" class="<?php echo $class ?>">
 168     <?php
 169     echo $e->getHTMLFormatted($config);
 170     ?>
 171 </div>
 172 <?php } ?>
 173 <p>Here is the source code of the purified HTML:</p>
 174 <pre id="source"><?php echo escapeHTML($pure_html); ?></pre>
 175 <?php
 176 if (getFormMethod() == 'post') { // start POST validation notice
 177 ?>
 178     <p>If you would like to validate the code with
 179     <a href="http://validator.w3.org/#validate-by-input">W3C's
 180     validator</a>, copy and paste the <em>entire</em> demo page's source.</p>
 181 <?php
 182 } // end POST validation notice
 183
 184 } // end main processing
 185
 186 // end result
 187 } else {
 188
 189 ?>
 190 <p>Welcome to the live demo.  Enter some HTML and see how HTML Purifier
 191 will filter it.</p>
 192 <?php
 193
 194 }
 195
 196 ?>
 197 <form id="filter" action="demo.php<?php
 198 echo '?' . getFormMethod();
 199 if (isset($_REQUEST['profile']) || isset($_REQUEST['XDEBUG_PROFILE'])) {
 200     echo '&amp;XDEBUG_PROFILE=1';
 201 } ?>" method="<?php echo getFormMethod();  ?>">
 202     <fieldset>
 203         <legend>HTML Purifier Input (<?php echo getFormMethod(); ?>)</legend>
 204
 205         <?php
 206 $form_printer = new HTMLPurifier_Printer_ConfigForm('filter', 'http://htmlpurifier.org/live/configdoc/plain.html#%s', 14);
 207 echo $form_printer->render($config, $allowed_lite, false);
 208         ?>
 209
 210         <div id="textarea">
 211         <textarea name="html" cols="60" rows="15"><?php
 212 if (isset($html)) echo escapeHTML($html);
 213         ?></textarea>
 214         </div>
 215
 216         <p>
 217             By default, HTML Purifier may remove some of your spacing or
 218             indentation. Turn on CollectErrors or experimental features in
 219             order to fully preserve whitespace.
 220         </p>
 221         <?php if (getFormMethod() == 'get') { ?>
 222             <p><strong>Warning:</strong> GET request method can only hold
 223                 8129 characters (probably less depending on your browser).
 224                 If you need to test anything
 225                 larger than that, try the <a href="?post">POST form</a>.</p>
 226         <?php } ?>
 227         <div>
 228             <input type="submit" value="Submit" name="submit" class="button"<?php echo $END; ?>>
 229             Use experimental features: <input type="checkbox" value="1" <?php if(!empty($_REQUEST['experimental'])) {echo 'checked="checked" ';} ?>name="experimental"<?php echo $END; ?>>
 230         </div>
 231     </fieldset>
 232 </form>
 233 <p>Try the form in <a href="?get">GET</a> and <a href="?post">POST</a> request
 234 flavors (GET is easy to validate with W3C, but POST allows larger inputs).
 235 Don't know what to test? Try out these sample filterings:</p>
 236 <ul>
 237     <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>
 238     <li><a href="demo.php?html=%3Cb%3EBold&amp;submit=Submit">Missing end tags fixed</a></li>
 239     <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>
 240     <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>
 241     <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>
 242     <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;experimental=1&amp;submit=Submit">Rich formatting preserved</a></li>
 243 </ul>
 244 </div>
 245 </body>
 246 </html>