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Fix documentation error in Filter.ExtractStyleBlocks and give better example.

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Signed-off-by: Edward Z. Yang <edwardzyang@thewritingpot.com>
This commit is contained in:
Edward Z. Yang 2008-08-01 18:58:47 -04:00
parent 85090520f1
commit 03dabec2c0
2 changed files with 44 additions and 7 deletions
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1
NEWS
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@ -35,6 +35,7 @@ NEWS ( CHANGELOG and HISTORY ) HTMLPurifier
available.
- Do not re-munge URL if the output URL has the same host as the input URL.
Requested by Chris.
- Fix error in documentation regarding %Filter.ExtractStyleBlocks
. Strategy_MakeWellFormed now operates in-place, saving memory and allowing
for more interesting filter-backtracking
. New HTMLPurifier_Injector->rewind() functionality, allows injectors to rewind

50
library/HTMLPurifier/ConfigSchema/schema/Filter.ExtractStyleBlocks.txt
View File

@ -14,13 +14,49 @@ EXTERNAL: CSSTidy
<p>
Sample usage:
</p>
<pre><![CDATA[$config = HTMLPurifier_Config::createDefault();
$config->set('Filter', 'ExtractStyleBlocks', true);
$purifier = new HTMLPurifier($config);
$styles = $purifier->context->get('StyleBlocks');
foreach ($styles as $style) {
echo '<style type="text/css">' . $style . "</style>\n";
}]]></pre>
<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;