Просмотр архива CRM Inclient Ver. 1.0.2.5

Filter.ExtractStyleBlocks
TYPE: bool
VERSION: 3.1.0
DEFAULT:
false
EXTERNAL: CSSTidy
--DESCRIPTION--
<p>
  This directive turns on
the style block extraction filter, which removes
 
<code>style</code> blocks from input HTML, cleans them up with
CSSTidy,
  and places them in the <code>StyleBlocks</code>
context variable, for further
  use by you, usually to be placed in an
external stylesheet, or a
  <code>style</code> block in the
<code>head</code> of your document.
</p>
<p>
 
Sample usage:
</p>
<pre><![CDATA[
<?php
   
header('Content-type: text/html; charset=utf-8');
    echo '<?xml
version="1.0"
encoding="UTF-8"?>';
?>
<!DOCTYPE html PUBLIC
"-//W3C//DTD XHTML 1.0 Transitional//EN"
 
"http://www.w3.org/TR/xhtml1/DTD/xhtml1-transitional.dtd">
<html
xmlns="http://www.w3.org/1999/xhtml" lang="en"
xml:lang="en">
<head>
 
<title>Filter.ExtractStyleBlocks</title>
<?php
   
require_once '/path/to/library/HTMLPurifier.auto.php';
    require_once
'/path/to/csstidy.class.php';

    $dirty = '<style>body
{color:#F00;}</style> Some text';

    $config =
HTMLPurifier_Config::createDefault();
    $config->set('Filter',
'ExtractStyleBlocks', true);
    $purifier = new HTMLPurifier($config);

  
 $html = $purifier->purify($dirty);

    // This implementation writes
the stylesheets to the styles/ directory.
    // You can also echo the
styles inside the document, but it's a bit
    // more difficult to make
sure they get interpreted properly by
    // browsers; try the usual CSS
armoring techniques.
    $styles =
$purifier->context->get('StyleBlocks');
    $dir = 'styles/';
    if
(!is_dir($dir)) mkdir($dir);
    $hash = sha1($_GET['html']);
    foreach
($styles as $i => $style) {
        file_put_contents($name = $dir .
$hash . "_$i");
        echo '<link rel="stylesheet"
type="text/css" href="'.$name.'" />';
   
}
?>
</head>
<body>
  <div>
    <?php echo $html;
?>
 
</div>
</b]]><![CDATA[ody>
</html>
]]></pre>
<p>

 <strong>Warning:</strong> It is possible for a user to mount
an
  imagecrash attack using this CSS. Counter-measures are difficult;
  it
is not simply enough to limit the range of CSS lengths (using
  relative
lengths with many nesting levels allows for large values
  to be attained
without actually specifying them in the stylesheet),
  and the flexible
nature of selectors makes it difficult to selectively
  disable lengths on
image tags (HTML Purifier, however, does disable
  CSS width and height in
inline styling). There are probably two effective
  counter measures: an
explicit width and height set to auto in all
  images in your document
(unlikely) or the disabling of width and
  height (somewhat reasonable).
Whether or not these measures should be
  used is left to the
reader.
</p>
--# vim: et sw=4 sts=4