/', '', $data);
}
}
if ($type & (SIMPLEPIE_CONSTRUCT_HTML | SIMPLEPIE_CONSTRUCT_XHTML))
{
// Strip comments
if ($this->strip_comments)
{
$data = SimplePie_Misc::strip_comments($data);
}
// Strip out HTML tags and attributes that might cause various security problems.
// Based on recommendations by Mark Pilgrim at:
// http://diveintomark.org/archives/2003/06/12/how_to_consume_rss_safely
if ($this->strip_htmltags)
{
foreach ($this->strip_htmltags as $tag)
{
$pcre = "/<($tag)" . SIMPLEPIE_PCRE_HTML_ATTRIBUTE . "(>(.*)<\/$tag" . SIMPLEPIE_PCRE_HTML_ATTRIBUTE . '>|(\/)?>)/siU';
while (preg_match($pcre, $data))
{
$data = preg_replace_callback($pcre, array(&$this, 'do_strip_htmltags'), $data);
}
}
}
if ($this->strip_attributes)
{
foreach ($this->strip_attributes as $attrib)
{
$data = preg_replace('/(<[A-Za-z][^\x09\x0A\x0B\x0C\x0D\x20\x2F\x3E]*)' . SIMPLEPIE_PCRE_HTML_ATTRIBUTE . trim($attrib) . '(?:\s*=\s*(?:"(?:[^"]*)"|\'(?:[^\']*)\'|(?:[^\x09\x0A\x0B\x0C\x0D\x20\x22\x27\x3E][^\x09\x0A\x0B\x0C\x0D\x20\x3E]*)?))?' . SIMPLEPIE_PCRE_HTML_ATTRIBUTE . '>/', '\1\2\3>', $data);
}
}
// Replace relative URLs
$this->base = $base;
foreach ($this->replace_url_attributes as $element => $attributes)
{
$data = $this->replace_urls($data, $element, $attributes);
}
// If image handling (caching, etc.) is enabled, cache and rewrite all the image tags.
if (isset($this->image_handler) && ((string) $this->image_handler) !== '' && $this->enable_cache)
{
$images = SimplePie_Misc::get_element('img', $data);
foreach ($images as $img)
{
if (isset($img['attribs']['src']['data']))
{
$image_url = call_user_func($this->cache_name_function, $img['attribs']['src']['data']);
$cache = call_user_func(array($this->cache_class, 'create'), $this->cache_location, $image_url, 'spi');
if ($cache->load())
{
$img['attribs']['src']['data'] = $this->image_handler . $image_url;
$data = str_replace($img['full'], SimplePie_Misc::element_implode($img), $data);
}
else
{
$file = new $this->file_class($img['attribs']['src']['data'], $this->timeout, 5, array('X-FORWARDED-FOR' => $_SERVER['REMOTE_ADDR']), $this->useragent, $this->force_fsockopen);
$headers = $file->headers;
if ($file->success && ($file->method & SIMPLEPIE_FILE_SOURCE_REMOTE === 0 || ($file->status_code === 200 || $file->status_code > 206 && $file->status_code < 300)))
{
if ($cache->save(array('headers' => $file->headers, 'body' => $file->body)))
{
$img['attribs']['src']['data'] = $this->image_handler . $image_url;
$data = str_replace($img['full'], SimplePie_Misc::element_implode($img), $data);
}
else
{
trigger_error("$this->cache_location is not writeable", E_USER_WARNING);
}
}
}
}
}
}
// Having (possibly) taken stuff out, there may now be whitespace at the beginning/end of the data
$data = trim($data);
}
if ($type & SIMPLEPIE_CONSTRUCT_IRI)
{
$data = SimplePie_Misc::absolutize_url($data, $base);
}
if ($type & (SIMPLEPIE_CONSTRUCT_TEXT | SIMPLEPIE_CONSTRUCT_IRI))
{
$data = htmlspecialchars($data, ENT_COMPAT, 'UTF-8');
}
if ($this->output_encoding !== 'UTF-8')
{
$data = SimplePie_Misc::change_encoding($data, 'UTF-8', $this->output_encoding);
}
}
return $data;
}
function replace_urls($data, $tag, $attributes)
{
if (!is_array($this->strip_htmltags) || !in_array($tag, $this->strip_htmltags))
{
$elements = SimplePie_Misc::get_element($tag, $data);
foreach ($elements as $element)
{
if (is_array($attributes))
{
foreach ($attributes as $attribute)
{
if (isset($element['attribs'][$attribute]['data']))
{
$element['attribs'][$attribute]['data'] = SimplePie_Misc::absolutize_url($element['attribs'][$attribute]['data'], $this->base);
$new_element = SimplePie_Misc::element_implode($element);
$data = str_replace($element['full'], $new_element, $data);
$element['full'] = $new_element;
}
}
}
elseif (isset($element['attribs'][$attributes]['data']))
{
$element['attribs'][$attributes]['data'] = SimplePie_Misc::absolutize_url($element['attribs'][$attributes]['data'], $this->base);
$data = str_replace($element['full'], SimplePie_Misc::element_implode($element), $data);
}
}
}
return $data;
}
function do_strip_htmltags($match)
{
if ($this->encode_instead_of_strip)
{
if (isset($match[4]) && !in_array(strtolower($match[1]), array('script', 'style')))
{
$match[1] = htmlspecialchars($match[1], ENT_COMPAT, 'UTF-8');
$match[2] = htmlspecialchars($match[2], ENT_COMPAT, 'UTF-8');
return "<$match[1]$match[2]>$match[3]</$match[1]>";
}
else
{
return htmlspecialchars($match[0], ENT_COMPAT, 'UTF-8');
}
}
elseif (isset($match[4]) && !in_array(strtolower($match[1]), array('script', 'style')))
{
return $match[4];
}
else
{
return '';
}
}
}
?>