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41cc1b08
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Assos Assos
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<?php
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class SimplePie_Sanitize
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{
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var $base;
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var $remove_div = true;
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var $image_handler = '';
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var $strip_htmltags = array('base', 'blink', 'body', 'doctype', 'embed', 'font', 'form', 'frame', 'frameset', 'html', 'iframe', 'input', 'marquee', 'meta', 'noscript', 'object', 'param', 'script', 'style');
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var $encode_instead_of_strip = false;
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var $strip_attributes = array('bgsound', 'class', 'expr', 'id', 'style', 'onclick', 'onerror', 'onfinish', 'onmouseover', 'onmouseout', 'onfocus', 'onblur', 'lowsrc', 'dynsrc');
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var $strip_comments = false;
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var $output_encoding = 'UTF-8';
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var $enable_cache = true;
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var $cache_location = './cache';
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var $cache_name_function = 'md5';
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var $timeout = 10;
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var $useragent = '';
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var $force_fsockopen = false;
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var $replace_url_attributes = null;
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public function __construct()
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{
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$this->set_url_replacements(null);
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}
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public function remove_div($enable = true)
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{
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$this->remove_div = (bool) $enable;
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}
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public function set_image_handler($page = false)
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{
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if ($page)
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{
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$this->image_handler = (string) $page;
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}
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else
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{
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$this->image_handler = false;
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}
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}
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public function set_registry(SimplePie_Registry $registry)
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{
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$this->registry = $registry;
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}
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public function pass_cache_data($enable_cache = true, $cache_location = './cache', $cache_name_function = 'md5', $cache_class = 'SimplePie_Cache')
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{
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if (isset($enable_cache))
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{
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$this->enable_cache = (bool) $enable_cache;
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}
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if ($cache_location)
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{
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$this->cache_location = (string) $cache_location;
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}
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if ($cache_name_function)
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{
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$this->cache_name_function = (string) $cache_name_function;
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}
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}
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public function pass_file_data($file_class = 'SimplePie_File', $timeout = 10, $useragent = '', $force_fsockopen = false)
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{
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if ($timeout)
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{
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$this->timeout = (string) $timeout;
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}
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if ($useragent)
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{
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$this->useragent = (string) $useragent;
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}
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if ($force_fsockopen)
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{
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$this->force_fsockopen = (string) $force_fsockopen;
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}
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}
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public function strip_htmltags($tags = array('base', 'blink', 'body', 'doctype', 'embed', 'font', 'form', 'frame', 'frameset', 'html', 'iframe', 'input', 'marquee', 'meta', 'noscript', 'object', 'param', 'script', 'style'))
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{
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if ($tags)
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{
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if (is_array($tags))
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{
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$this->strip_htmltags = $tags;
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}
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else
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{
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$this->strip_htmltags = explode(',', $tags);
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}
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}
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else
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{
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$this->strip_htmltags = false;
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}
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}
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public function encode_instead_of_strip($encode = false)
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{
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$this->encode_instead_of_strip = (bool) $encode;
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}
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public function strip_attributes($attribs = array('bgsound', 'class', 'expr', 'id', 'style', 'onclick', 'onerror', 'onfinish', 'onmouseover', 'onmouseout', 'onfocus', 'onblur', 'lowsrc', 'dynsrc'))
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{
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if ($attribs)
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{
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if (is_array($attribs))
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{
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$this->strip_attributes = $attribs;
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}
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else
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{
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$this->strip_attributes = explode(',', $attribs);
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}
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}
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else
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{
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$this->strip_attributes = false;
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}
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}
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public function strip_comments($strip = false)
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{
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$this->strip_comments = (bool) $strip;
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}
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public function set_output_encoding($encoding = 'UTF-8')
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{
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$this->output_encoding = (string) $encoding;
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}
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public function set_url_replacements($element_attribute = null)
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{
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if ($element_attribute === null)
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{
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$element_attribute = array(
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'a' => 'href',
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'area' => 'href',
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'blockquote' => 'cite',
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'del' => 'cite',
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'form' => 'action',
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'img' => array(
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'longdesc',
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'src'
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),
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'input' => 'src',
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'ins' => 'cite',
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'q' => 'cite'
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);
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}
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$this->replace_url_attributes = (array) $element_attribute;
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}
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public function sanitize($data, $type, $base = '')
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{
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$data = trim($data);
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if ($data !== '' || $type & SIMPLEPIE_CONSTRUCT_IRI)
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{
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if ($type & SIMPLEPIE_CONSTRUCT_MAYBE_HTML)
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{
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if (preg_match('/(&(#(x[0-9a-fA-F]+|[0-9]+)|[a-zA-Z0-9]+)|<\/[A-Za-z][^\x09\x0A\x0B\x0C\x0D\x20\x2F\x3E]*' . SIMPLEPIE_PCRE_HTML_ATTRIBUTE . '>)/', $data))
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{
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$type |= SIMPLEPIE_CONSTRUCT_HTML;
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}
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else
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{
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$type |= SIMPLEPIE_CONSTRUCT_TEXT;
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}
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}
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if ($type & SIMPLEPIE_CONSTRUCT_BASE64)
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{
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$data = base64_decode($data);
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}
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if ($type & (SIMPLEPIE_CONSTRUCT_HTML | SIMPLEPIE_CONSTRUCT_XHTML))
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{
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$document = new DOMDocument();
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$document->encoding = 'UTF-8';
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$data = $this->preprocess($data, $type);
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set_error_handler(array('SimplePie_Misc', 'silence_errors'));
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$document->loadHTML($data);
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restore_error_handler();
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if ($this->strip_comments)
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{
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$xpath = new DOMXPath($document);
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$comments = $xpath->query('//comment()');
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foreach ($comments as $comment)
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{
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$comment->parentNode->removeChild($comment);
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}
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}
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if ($this->strip_htmltags)
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{
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foreach ($this->strip_htmltags as $tag)
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{
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$this->strip_tag($tag, $document, $type);
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}
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}
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if ($this->strip_attributes)
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{
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foreach ($this->strip_attributes as $attrib)
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{
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$this->strip_attr($attrib, $document);
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}
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}
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$this->base = $base;
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foreach ($this->replace_url_attributes as $element => $attributes)
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{
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$this->replace_urls($document, $element, $attributes);
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}
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if (isset($this->image_handler) && ((string) $this->image_handler) !== '' && $this->enable_cache)
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{
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$images = $document->getElementsByTagName('img');
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foreach ($images as $img)
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{
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if ($img->hasAttribute('src'))
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{
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$image_url = call_user_func($this->cache_name_function, $img->getAttribute('src'));
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$cache = $this->registry->call('Cache', 'get_handler', array($this->cache_location, $image_url, 'spi'));
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if ($cache->load())
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{
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$img->setAttribute('src', $this->image_handler . $image_url);
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}
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else
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{
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$file = $this->registry->create('File', array($img['attribs']['src']['data'], $this->timeout, 5, array('X-FORWARDED-FOR' => $_SERVER['REMOTE_ADDR']), $this->useragent, $this->force_fsockopen));
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$headers = $file->headers;
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if ($file->success && ($file->method & SIMPLEPIE_FILE_SOURCE_REMOTE === 0 || ($file->status_code === 200 || $file->status_code > 206 && $file->status_code < 300)))
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{
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if ($cache->save(array('headers' => $file->headers, 'body' => $file->body)))
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{
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$img->setAttribute('src', $this->image_handler . $image_url);
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}
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else
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{
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trigger_error("$this->cache_location is not writeable. Make sure you've set the correct relative or absolute path, and that the location is server-writable.", E_USER_WARNING);
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}
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}
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}
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}
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}
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}
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if ($document->firstChild instanceof DOMDocumentType)
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{
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$document->removeChild($document->firstChild);
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}
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$real_body = $document->getElementsByTagName('body')->item(0)->childNodes->item(0);
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$document->replaceChild($real_body, $document->firstChild);
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$data = trim($document->saveHTML());
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if ($this->remove_div)
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{
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$data = preg_replace('/^<div' . SIMPLEPIE_PCRE_XML_ATTRIBUTE . '>/', '', $data);
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$data = preg_replace('/<\/div>$/', '', $data);
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}
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else
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{
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$data = preg_replace('/^<div' . SIMPLEPIE_PCRE_XML_ATTRIBUTE . '>/', '<div>', $data);
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}
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}
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if ($type & SIMPLEPIE_CONSTRUCT_IRI)
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{
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$absolute = $this->registry->call('Misc', 'absolutize_url', array($data, $base));
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if ($absolute !== false)
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{
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$data = $absolute;
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}
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}
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if ($type & (SIMPLEPIE_CONSTRUCT_TEXT | SIMPLEPIE_CONSTRUCT_IRI))
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{
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$data = htmlspecialchars($data, ENT_COMPAT, 'UTF-8');
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}
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if ($this->output_encoding !== 'UTF-8')
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{
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$data = $this->registry->call('Misc', 'change_encoding', array($data, 'UTF-8', $this->output_encoding));
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}
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}
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return $data;
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}
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protected function preprocess($html, $type)
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| 380 |
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{
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$ret = '';
|
| 382 |
|
|
if ($type & ~SIMPLEPIE_CONSTRUCT_XHTML)
|
| 383 |
|
|
{
|
| 384 |
|
|
|
| 385 |
|
|
|
| 386 |
|
|
$html = '<div>' . $html . '</div>';
|
| 387 |
|
|
$ret .= '<!DOCTYPE html>';
|
| 388 |
|
|
$content_type = 'text/html';
|
| 389 |
|
|
}
|
| 390 |
|
|
else
|
| 391 |
|
|
{
|
| 392 |
|
|
$ret .= '<!DOCTYPE html PUBLIC "-//W3C//DTD XHTML 1.0 Strict//EN" "http://www.w3.org/TR/xhtml1/DTD/xhtml1-strict.dtd">';
|
| 393 |
|
|
$content_type = 'application/xhtml+xml';
|
| 394 |
|
|
}
|
| 395 |
|
|
|
| 396 |
|
|
$ret .= '<html><head>';
|
| 397 |
|
|
$ret .= '<meta http-equiv="Content-Type" content="' . $content_type . '; charset=utf-8" />';
|
| 398 |
|
|
$ret .= '</head><body>' . $html . '</body></html>';
|
| 399 |
|
|
return $ret;
|
| 400 |
|
|
}
|
| 401 |
|
|
|
| 402 |
|
|
public function replace_urls($document, $tag, $attributes)
|
| 403 |
|
|
{
|
| 404 |
|
|
if (!is_array($attributes))
|
| 405 |
|
|
{
|
| 406 |
|
|
$attributes = array($attributes);
|
| 407 |
|
|
}
|
| 408 |
|
|
|
| 409 |
|
|
if (!is_array($this->strip_htmltags) || !in_array($tag, $this->strip_htmltags))
|
| 410 |
|
|
{
|
| 411 |
|
|
$elements = $document->getElementsByTagName($tag);
|
| 412 |
|
|
foreach ($elements as $element)
|
| 413 |
|
|
{
|
| 414 |
|
|
foreach ($attributes as $attribute)
|
| 415 |
|
|
{
|
| 416 |
|
|
if ($element->hasAttribute($attribute))
|
| 417 |
|
|
{
|
| 418 |
|
|
$value = $this->registry->call('Misc', 'absolutize_url', array($element->getAttribute($attribute), $this->base));
|
| 419 |
|
|
if ($value !== false)
|
| 420 |
|
|
{
|
| 421 |
|
|
$element->setAttribute($attribute, $value);
|
| 422 |
|
|
}
|
| 423 |
|
|
}
|
| 424 |
|
|
}
|
| 425 |
|
|
}
|
| 426 |
|
|
}
|
| 427 |
|
|
}
|
| 428 |
|
|
|
| 429 |
|
|
public function do_strip_htmltags($match)
|
| 430 |
|
|
{
|
| 431 |
|
|
if ($this->encode_instead_of_strip)
|
| 432 |
|
|
{
|
| 433 |
|
|
if (isset($match[4]) && !in_array(strtolower($match[1]), array('script', 'style')))
|
| 434 |
|
|
{
|
| 435 |
|
|
$match[1] = htmlspecialchars($match[1], ENT_COMPAT, 'UTF-8');
|
| 436 |
|
|
$match[2] = htmlspecialchars($match[2], ENT_COMPAT, 'UTF-8');
|
| 437 |
|
|
return "<$match[1]$match[2]>$match[3]</$match[1]>";
|
| 438 |
|
|
}
|
| 439 |
|
|
else
|
| 440 |
|
|
{
|
| 441 |
|
|
return htmlspecialchars($match[0], ENT_COMPAT, 'UTF-8');
|
| 442 |
|
|
}
|
| 443 |
|
|
}
|
| 444 |
|
|
elseif (isset($match[4]) && !in_array(strtolower($match[1]), array('script', 'style')))
|
| 445 |
|
|
{
|
| 446 |
|
|
return $match[4];
|
| 447 |
|
|
}
|
| 448 |
|
|
else
|
| 449 |
|
|
{
|
| 450 |
|
|
return '';
|
| 451 |
|
|
}
|
| 452 |
|
|
}
|
| 453 |
|
|
|
| 454 |
|
|
protected function strip_tag($tag, $document, $type)
|
| 455 |
|
|
{
|
| 456 |
|
|
$xpath = new DOMXPath($document);
|
| 457 |
|
|
$elements = $xpath->query('body//' . $tag);
|
| 458 |
|
|
if ($this->encode_instead_of_strip)
|
| 459 |
|
|
{
|
| 460 |
|
|
foreach ($elements as $element)
|
| 461 |
|
|
{
|
| 462 |
|
|
$fragment = $document->createDocumentFragment();
|
| 463 |
|
|
|
| 464 |
|
|
|
| 465 |
|
|
if (!in_array($tag, array('script', 'style')))
|
| 466 |
|
|
{
|
| 467 |
|
|
$text = '<' . $tag;
|
| 468 |
|
|
if ($element->hasAttributes())
|
| 469 |
|
|
{
|
| 470 |
|
|
$attrs = array();
|
| 471 |
|
|
foreach ($element->attributes as $name => $attr)
|
| 472 |
|
|
{
|
| 473 |
|
|
$value = $attr->value;
|
| 474 |
|
|
|
| 475 |
|
|
|
| 476 |
|
|
if (empty($value) && ($type & SIMPLEPIE_CONSTRUCT_XHTML))
|
| 477 |
|
|
{
|
| 478 |
|
|
$value = $name;
|
| 479 |
|
|
}
|
| 480 |
|
|
|
| 481 |
|
|
elseif (empty($value) && ($type & SIMPLEPIE_CONSTRUCT_HTML))
|
| 482 |
|
|
{
|
| 483 |
|
|
$attrs[] = $name;
|
| 484 |
|
|
continue;
|
| 485 |
|
|
}
|
| 486 |
|
|
|
| 487 |
|
|
|
| 488 |
|
|
$attrs[] = $name . '="' . $attr->value . '"';
|
| 489 |
|
|
}
|
| 490 |
|
|
$text .= ' ' . implode(' ', $attrs);
|
| 491 |
|
|
}
|
| 492 |
|
|
$text .= '>';
|
| 493 |
|
|
$fragment->appendChild(new DOMText($text));
|
| 494 |
|
|
}
|
| 495 |
|
|
|
| 496 |
|
|
$number = $element->childNodes->length;
|
| 497 |
|
|
for ($i = $number; $i > 0; $i--)
|
| 498 |
|
|
{
|
| 499 |
|
|
$child = $element->childNodes->item(0);
|
| 500 |
|
|
$fragment->appendChild($child);
|
| 501 |
|
|
}
|
| 502 |
|
|
|
| 503 |
|
|
if (!in_array($tag, array('script', 'style')))
|
| 504 |
|
|
{
|
| 505 |
|
|
$fragment->appendChild(new DOMText('</' . $tag . '>'));
|
| 506 |
|
|
}
|
| 507 |
|
|
|
| 508 |
|
|
$element->parentNode->replaceChild($fragment, $element);
|
| 509 |
|
|
}
|
| 510 |
|
|
|
| 511 |
|
|
return;
|
| 512 |
|
|
}
|
| 513 |
|
|
elseif (in_array($tag, array('script', 'style')))
|
| 514 |
|
|
{
|
| 515 |
|
|
foreach ($elements as $element)
|
| 516 |
|
|
{
|
| 517 |
|
|
$element->parentNode->removeChild($element);
|
| 518 |
|
|
}
|
| 519 |
|
|
|
| 520 |
|
|
return;
|
| 521 |
|
|
}
|
| 522 |
|
|
else
|
| 523 |
|
|
{
|
| 524 |
|
|
foreach ($elements as $element)
|
| 525 |
|
|
{
|
| 526 |
|
|
$fragment = $document->createDocumentFragment();
|
| 527 |
|
|
$number = $element->childNodes->length;
|
| 528 |
|
|
for ($i = $number; $i > 0; $i--)
|
| 529 |
|
|
{
|
| 530 |
|
|
$child = $element->childNodes->item(0);
|
| 531 |
|
|
$fragment->appendChild($child);
|
| 532 |
|
|
}
|
| 533 |
|
|
|
| 534 |
|
|
$element->parentNode->replaceChild($fragment, $element);
|
| 535 |
|
|
}
|
| 536 |
|
|
}
|
| 537 |
|
|
}
|
| 538 |
|
|
|
| 539 |
|
|
protected function strip_attr($attrib, $document)
|
| 540 |
|
|
{
|
| 541 |
|
|
$xpath = new DOMXPath($document);
|
| 542 |
|
|
$elements = $xpath->query('//*[@' . $attrib . ']');
|
| 543 |
|
|
|
| 544 |
|
|
foreach ($elements as $element)
|
| 545 |
|
|
{
|
| 546 |
|
|
$element->removeAttribute($attrib);
|
| 547 |
|
|
}
|
| 548 |
|
|
}
|
| 549 |
|
|
} |
