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