<?php
+
/**
* SafeHTML Parser
*
- * @package SafeHTML
- * @author Roman Ivanov <thingol@mail.ru>
+ * @note
+ * Attention : Quelques modifications pour PHP 5.5 et 7
+ *
+ * @package SafeHTML
+ * @author Roman Ivanov <thingol@mail.ru>
* @copyright 2004-2005 Roman Ivanov
- * @license http://www.debian.org/misc/bsd.license BSD License (3 Clause)
+ * @license http://www.debian.org/misc/bsd.license BSD License (3 Clause)
* @version 1.3.7
- * @link http://pixel-apes.com/safehtml/
+ * @link http://pixel-apes.com/safehtml/
*/
+
if (!defined('_ECRIRE_INC_VERSION')) return;
require_once(XML_HTMLSAX3 . 'HTMLSax3.php');
+/**
+ *
+ * SafeHTML Parser
+ *
+ * This parser strips down all potentially dangerous content within HTML:
+ * <ul>
+ * <li>opening tag without its closing tag</li>
+ * <li>closing tag without its opening tag</li>
+ * <li>any of these tags: "base", "basefont", "head", "html", "body", "applet",
+ * "object", "iframe", "frame", "frameset", "script", "layer", "ilayer", "embed",
+ * "bgsound", "link", "meta", "style", "title", "blink", "xml" etc.</li>
+ * <li>any of these attributes: on*, data*, dynsrc</li>
+ * <li>javascript:/vbscript:/about: etc. protocols</li>
+ * <li>expression/behavior etc. in styles</li>
+ * <li>any other active content</li>
+ * </ul>
+ * It also tries to convert code to XHTML valid, but htmltidy is far better
+ * solution for this task.
+ *
+ * <b>Example:</b>
+ * <pre>
+ * $parser =& new SafeHTML();
+ * $result = $parser->parse($doc);
+ * </pre>
+ *
+ * @category HTML
+ * @package SafeHTML
+ * @author Roman Ivanov <thingol@mail.ru>
+ * @copyright 1997-2005 Roman Ivanov
+ * @license http://www.debian.org/misc/bsd.license BSD License (3 Clause)
+ * @version Release: @package_version@
+ * @link http://pear.php.net/package/SafeHTML
+ */
class SafeHTML
{
- var $_xhtml = '';
-
- var $_counter = array();
-
- var $_stack = array();
-
- var $_dcCounter = array();
-
- var $_dcStack = array();
-
- var $_listScope = 0;
-
- var $_liStack = array();
-
- var $_protoRegexps = array();
-
- var $_cssRegexps = array();
-
- var $singleTags = array('area', 'br', 'img', 'input', 'hr', 'wbr', );
-
- var $deleteTags = array(
- 'applet', 'base', 'basefont', 'bgsound', 'blink', 'body',
- 'embed', 'frame', 'frameset', 'head', 'html', 'ilayer',
- 'iframe', 'layer', 'link', 'meta', 'object', 'style',
- 'title', 'script',
- );
-
- var $deleteTagsContent = array('script', 'style', 'title', 'xml', );
-
- var $protocolFiltering = 'white';
-
- var $blackProtocols = array(
- 'about', 'chrome', 'data', 'disk', 'hcp',
- 'help', 'javascript', 'livescript', 'lynxcgi', 'lynxexec',
- 'ms-help', 'ms-its', 'mhtml', 'mocha', 'opera',
- 'res', 'resource', 'shell', 'vbscript', 'view-source',
- 'vnd.ms.radio', 'wysiwyg',
- );
-
- var $whiteProtocols = array(
- 'ed2k', 'file', 'ftp', 'gopher', 'http', 'https',
- 'irc', 'mailto', 'news', 'nntp', 'telnet', 'webcal',
- 'xmpp', 'callto',
- );
-
- var $protocolAttributes = array(
- 'action', 'background', 'codebase', 'dynsrc', 'href', 'lowsrc', 'src',
- );
-
- var $cssKeywords = array(
- 'absolute', 'behavior', 'behaviour', 'content', 'expression',
- 'fixed', 'include-source', 'moz-binding',
- );
-
- var $noClose = array();
-
- var $closeParagraph = array(
- 'address', 'blockquote', 'center', 'dd', 'dir', 'div',
- 'dl', 'dt', 'h1', 'h2', 'h3', 'h4',
- 'h5', 'h6', 'hr', 'isindex', 'listing', 'marquee',
- 'menu', 'multicol', 'ol', 'p', 'plaintext', 'pre',
- 'table', 'ul', 'xmp',
- );
-
- var $tableTags = array(
- 'caption', 'col', 'colgroup', 'tbody', 'td', 'tfoot', 'th',
- 'thead', 'tr',
- );
-
- var $listTags = array('dir', 'menu', 'ol', 'ul', 'dl', );
-
- var $attributes = array('dynsrc', 'id', 'name', );
-
- var $attributesNS = array('xml:lang', );
-
- function SafeHTML()
- {
- //making regular expressions based on Proto & CSS arrays
- foreach ($this->blackProtocols as $proto) {
- $preg = "/[\s\x01-\x1F]*";
- for ($i=0; $i<strlen($proto); $i++) {
- $preg .= $proto{$i} . "[\s\x01-\x1F]*";
- }
- $preg .= ":/i";
- $this->_protoRegexps[] = $preg;
- }
-
- foreach ($this->cssKeywords as $css) {
- $this->_cssRegexps[] = '/' . $css . '/i';
- }
- return true;
- }
-
- function _writeAttrs ($attrs,$tag=null)
- {
- if (is_array($attrs)) {
- foreach ($attrs as $name => $value) {
-
- $name = strtolower($name);
-
- if (strpos($name, 'on') === 0) {
- continue;
- }
- if (strpos($name, 'data') === 0) {
- continue;
- }
- if ($tag !='a' AND in_array($name, $this->attributes)) {
- continue;
- }
- if (!preg_match("/^[a-z0-9-]+$/i", $name)) {
- if (!in_array($name, $this->attributesNS))
- {
- continue;
- }
- }
+ /**
+ * Storage for resulting HTML output
+ *
+ * @var string
+ * @access private
+ */
+ var $_xhtml = '';
+
+ /**
+ * Array of counters for each tag
+ *
+ * @var array
+ * @access private
+ */
+ var $_counter = array();
+
+ /**
+ * Stack of unclosed tags
+ *
+ * @var array
+ * @access private
+ */
+ var $_stack = array();
+
+ /**
+ * Array of counters for tags that must be deleted with all content
+ *
+ * @var array
+ * @access private
+ */
+ var $_dcCounter = array();
+
+ /**
+ * Stack of unclosed tags that must be deleted with all content
+ *
+ * @var array
+ * @access private
+ */
+ var $_dcStack = array();
+
+ /**
+ * Stores level of list (ol/ul) nesting
+ *
+ * @var int
+ * @access private
+ */
+ var $_listScope = 0;
+
+ /**
+ * Stack of unclosed list tags
+ *
+ * @var array
+ * @access private
+ */
+ var $_liStack = array();
+
+ /**
+ * Array of prepared regular expressions for protocols (schemas) matching
+ *
+ * @var array
+ * @access private
+ */
+ var $_protoRegexps = array();
+
+ /**
+ * Array of prepared regular expressions for CSS matching
+ *
+ * @var array
+ * @access private
+ */
+ var $_cssRegexps = array();
+
+ /**
+ * Should we perform UTF7 repacking or not?
+ *
+ * This repacking might replace completely normal strings such as "+31-" by illegal sequences,
+ * which cause the document to be truncated on saving to MySQL
+ *
+ * @var boolean
+ * @access public
+ */
+ var $repackUTF7 = true;
+
+ /**
+ * List of single tags ("<tag />")
+ *
+ * @var array
+ * @access public
+ */
+ var $singleTags = array('area', 'br', 'img', 'input', 'hr', 'wbr', );
+
+ /**
+ * List of dangerous tags (such tags will be deleted)
+ *
+ * @var array
+ * @access public
+ */
+ var $deleteTags = array(
+ 'applet', 'base', 'basefont', 'bgsound', 'blink', 'body',
+ 'embed', 'frame', 'frameset', 'head', 'html', 'ilayer',
+ 'iframe', 'layer', 'link', 'meta', 'object', 'style',
+ 'title', 'script',
+ );
+
+ /**
+ * List of dangerous tags (such tags will be deleted, and all content
+ * inside this tags will be also removed)
+ *
+ * @var array
+ * @access public
+ */
+ var $deleteTagsContent = array('script', 'style', 'title', 'xml', );
+
+ /**
+ * Type of protocols filtering ('white' or 'black')
+ *
+ * @var string
+ * @access public
+ */
+ var $protocolFiltering = 'white';
+
+ /**
+ * List of "dangerous" protocols (used for blacklist-filtering)
+ *
+ * @var array
+ * @access public
+ */
+ var $blackProtocols = array(
+ 'about', 'chrome', 'data', 'disk', 'hcp',
+ 'help', 'javascript', 'livescript', 'lynxcgi', 'lynxexec',
+ 'ms-help', 'ms-its', 'mhtml', 'mocha', 'opera',
+ 'res', 'resource', 'shell', 'vbscript', 'view-source',
+ 'vnd.ms.radio', 'wysiwyg',
+ );
+
+ /**
+ * List of "safe" protocols (used for whitelist-filtering)
+ *
+ * @var array
+ * @access public
+ */
+ var $whiteProtocols = array(
+ 'ed2k', 'file', 'ftp', 'gopher', 'http', 'https',
+ 'irc', 'mailto', 'news', 'nntp', 'telnet', 'webcal',
+ 'xmpp', 'callto',
+ );
+
+ /**
+ * List of attributes that can contain protocols
+ *
+ * @var array
+ * @access public
+ */
+ var $protocolAttributes = array(
+ 'action', 'background', 'codebase', 'dynsrc', 'href', 'lowsrc', 'src', 'formaction',
+ );
+
+ /**
+ * List of dangerous CSS keywords
+ *
+ * Whole style="" attribute will be removed, if parser will find one of
+ * these keywords
+ *
+ * @var array
+ * @access public
+ */
+ var $cssKeywords = array(
+ 'absolute', 'behavior', 'behaviour', 'content', 'expression',
+ 'fixed', 'include-source', 'moz-binding',
+ );
+
+ /**
+ * List of tags that can have no "closing tag"
+ *
+ * @var array
+ * @access public
+ * @deprecated XHTML does not allow such tags
+ */
+ var $noClose = array();
+
+ /**
+ * List of block-level tags that terminates paragraph
+ *
+ * Paragraph will be closed when this tags opened
+ *
+ * @var array
+ * @access public
+ */
+ var $closeParagraph = array(
+ 'address', 'blockquote', 'center', 'dd', 'dir', 'div',
+ 'dl', 'dt', 'h1', 'h2', 'h3', 'h4',
+ 'h5', 'h6', 'hr', 'isindex', 'listing', 'marquee',
+ 'menu', 'multicol', 'ol', 'p', 'plaintext', 'pre',
+ 'table', 'ul', 'xmp',
+ );
+
+ /**
+ * List of table tags, all table tags outside a table will be removed
+ *
+ * @var array
+ * @access public
+ */
+ var $tableTags = array(
+ 'caption', 'col', 'colgroup', 'tbody', 'td', 'tfoot', 'th',
+ 'thead', 'tr',
+ );
+
+ /**
+ * List of list tags
+ *
+ * @var array
+ * @access public
+ */
+ var $listTags = array('dir', 'menu', 'ol', 'ul', 'dl', );
+
+ /**
+ * List of dangerous attributes
+ *
+ * @var array
+ * @access public
+ */
+ var $attributes = array('dynsrc', 'id', 'name', );
+
+ /**
+ * List of allowed "namespaced" attributes
+ *
+ * @var array
+ * @access public
+ */
+ var $attributesNS = array('xml:lang', );
+
+ /**
+ * Constructs class
+ *
+ * @access public
+ */
+ function __contruct()
+ {
+ //making regular expressions based on Proto & CSS arrays
+ foreach ($this->blackProtocols as $proto) {
+ $preg = "/[\s\x01-\x1F]*";
+ for ($i=0; $i<strlen($proto); $i++) {
+ $preg .= $proto{$i} . "[\s\x01-\x1F]*";
+ }
+ $preg .= ":/i";
+ $this->_protoRegexps[] = $preg;
+ }
- if (($value === TRUE) || (is_null($value))) {
- $value = $name;
+ foreach ($this->cssKeywords as $css) {
+ $this->_cssRegexps[] = '/' . $css . '/i';
+ }
+ return true;
}
- if ($name == 'style') {
+ /**
+ * Handles the writing of attributes - called from $this->_openHandler()
+ *
+ * @param array $attrs array of attributes $name => $value
+ * @return boolean
+ * @access private
+ */
+ function _writeAttrs ($attrs, $tag = null)
+ {
+ if (is_array($attrs)) {
+ foreach ($attrs as $name => $value) {
+
+ $name = strtolower($name);
+
+ if (strpos($name, 'on') === 0) {
+ continue;
+ }
+ if (strpos($name, 'data') === 0) {
+ continue;
+ }
+ if ($tag != 'a' and in_array($name, $this->attributes)) {
+ continue;
+ }
+ if (!preg_match("/^[a-z0-9]+$/i", $name)) {
+ if (!in_array($name, $this->attributesNS))
+ {
+ continue;
+ }
+ }
+
+ if (($value === TRUE) || (is_null($value))) {
+ $value = $name;
+ }
+
+ if ($name == 'style') {
// removes insignificant backslahes
- $value = str_replace("\\", '', $value);
+ $value = str_replace("\\", '', $value);
// removes CSS comments
while (1)
}
// replace all & to &
- $value = str_replace('&', '&', $value);
- $value = str_replace('&', '&', $value);
+ $value = str_replace('&', '&', $value);
+ $value = str_replace('&', '&', $value);
- foreach ($this->_cssRegexps as $css) {
- if (preg_match($css, $value)) {
- continue 2;
+ foreach ($this->_cssRegexps as $css) {
+ if (preg_match($css, $value)) {
+ continue 2;
+ }
+ }
+ foreach ($this->_protoRegexps as $proto) {
+ if (preg_match($proto, $value)) {
+ continue 2;
+ }
+ }
+ }
+
+ $tempval = preg_replace_callback('/&#(\d+);?/m', create_function('$m', 'return chr($m[1]);'), $value); //"'
+ $tempval = preg_replace_callback('/&#x([0-9a-f]+);?/mi', create_function('$m', 'return chr(hexdec($m[1]));'), $tempval); //"'
+
+ if ((in_array($name, $this->protocolAttributes)) &&
+ (strpos($tempval, ':') !== false))
+ {
+ if ($this->protocolFiltering == 'black') {
+ foreach ($this->_protoRegexps as $proto) {
+ if (preg_match($proto, $tempval)) continue 2;
+ }
+ } else {
+ $_tempval = explode(':', $tempval);
+ $proto = $_tempval[0];
+ if (!in_array($proto, $this->whiteProtocols)) {
+ continue;
+ }
+ }
+ }
+
+ $value = str_replace("\"", """, $value);
+ $this->_xhtml .= ' ' . $name . '="' . $value . '"';
+ }
}
- }
- foreach ($this->_protoRegexps as $proto) {
- if (preg_match($proto, $value)) {
- continue 2;
+ return true;
+ }
+
+ /**
+ * Opening tag handler - called from HTMLSax
+ *
+ * @param object $parser HTML Parser
+ * @param string $name tag name
+ * @param array $attrs tag attributes
+ * @return boolean
+ * @access private
+ */
+ function _openHandler(&$parser, $name, $attrs)
+ {
+ $name = strtolower($name);
+
+ if (in_array($name, $this->deleteTagsContent)) {
+ array_push($this->_dcStack, $name);
+ $this->_dcCounter[$name] = isset($this->_dcCounter[$name]) ? $this->_dcCounter[$name]+1 : 1;
}
- }
+ if (count($this->_dcStack) != 0) {
+ return true;
+ }
+
+ if (in_array($name, $this->deleteTags)) {
+ return true;
+ }
+
+ if (!preg_match("/^[a-z0-9]+$/i", $name)) {
+ if (preg_match("!(?:\@|://)!i", $name)) {
+ $this->_xhtml .= '<' . $name . '>';
+ }
+ return true;
+ }
+
+ if (in_array($name, $this->singleTags)) {
+ $this->_xhtml .= '<' . $name;
+ $this->_writeAttrs($attrs, $name);
+ $this->_xhtml .= ' />';
+ return true;
+ }
+
+ // TABLES: cannot open table elements when we are not inside table
+ if ((isset($this->_counter['table'])) && ($this->_counter['table'] <= 0)
+ && (in_array($name, $this->tableTags)))
+ {
+ return true;
+ }
+
+ // PARAGRAPHS: close paragraph when closeParagraph tags opening
+ if ((in_array($name, $this->closeParagraph)) && (in_array('p', $this->_stack))) {
+ $this->_closeHandler($parser, 'p');
+ }
+
+ // LISTS: we should close <li> if <li> of the same level opening
+ if ($name == 'li' && count($this->_liStack) &&
+ $this->_listScope == $this->_liStack[count($this->_liStack)-1])
+ {
+ $this->_closeHandler($parser, 'li');
+ }
+
+ // LISTS: we want to know on what nesting level of lists we are
+ if (in_array($name, $this->listTags)) {
+ $this->_listScope++;
+ }
+ if ($name == 'li') {
+ array_push($this->_liStack, $this->_listScope);
+ }
+
+ $this->_xhtml .= '<' . $name;
+ $this->_writeAttrs($attrs, $name);
+ $this->_xhtml .= '>';
+ array_push($this->_stack,$name);
+ $this->_counter[$name] = isset($this->_counter[$name]) ? $this->_counter[$name]+1 : 1;
+ return true;
+ }
+
+ /**
+ * Closing tag handler - called from HTMLSax
+ *
+ * @param object $parsers HTML parser
+ * @param string $name tag name
+ * @return boolean
+ * @access private
+ */
+ function _closeHandler(&$parser, $name)
+ {
+
+ $name = strtolower($name);
+
+ if (isset($this->_dcCounter[$name]) && ($this->_dcCounter[$name] > 0) &&
+ (in_array($name, $this->deleteTagsContent)))
+ {
+ while ($name != ($tag = array_pop($this->_dcStack))) {
+ $this->_dcCounter[$tag]--;
+ }
+
+ $this->_dcCounter[$name]--;
+ }
+
+ if (count($this->_dcStack) != 0) {
+ return true;
+ }
+
+ if ((isset($this->_counter[$name])) && ($this->_counter[$name] > 0)) {
+ while ($name != ($tag = array_pop($this->_stack))) {
+ $this->_closeTag($tag);
+ }
+
+ $this->_closeTag($name);
+ }
+ return true;
}
- $tempval = preg_replace_callback('/&#(\d+);?/m', create_function('$m', 'return chr($m[1]);'), $value);
- $tempval = preg_replace_callback('/&#x([0-9a-f]+);?/mi', create_function('$m', 'return chr(hexdec($m[1]));'), $tempval);
+ /**
+ * Closes tag
+ *
+ * @param string $tag tag name
+ * @return boolean
+ * @access private
+ */
+ function _closeTag($tag)
+ {
+ if (!in_array($tag, $this->noClose)) {
+ $this->_xhtml .= '</' . $tag . '>';
+ }
+
+ $this->_counter[$tag]--;
+
+ if (in_array($tag, $this->listTags)) {
+ $this->_listScope--;
+ }
- if ((in_array($name, $this->protocolAttributes)) &&
- (strpos($tempval, ':') !== false))
+ if ($tag == 'li') {
+ array_pop($this->_liStack);
+ }
+ return true;
+ }
+
+ /**
+ * Character data handler - called from HTMLSax
+ *
+ * @param object $parser HTML parser
+ * @param string $data textual data
+ * @return boolean
+ * @access private
+ */
+ function _dataHandler(&$parser, $data)
{
- if ($this->protocolFiltering == 'black') {
- foreach ($this->_protoRegexps as $proto) {
- if (preg_match($proto, $tempval)) continue 2;
- }
- } else {
- $_tempval = explode(':', $tempval);
- $proto = $_tempval[0];
- if (!in_array($proto, $this->whiteProtocols)) {
- continue;
- }
- }
+ if (count($this->_dcStack) == 0) {
+ $this->_xhtml .= $data;
+ }
+ return true;
}
- $value = str_replace("\"", """, $value);
- $this->_xhtml .= ' ' . $name . '="' . $value . '"';
- }
- }
- return true;
- }
-
- function _openHandler(&$parser, $name, $attrs)
- {
- $name = strtolower($name);
-
- if (in_array($name, $this->deleteTagsContent)) {
- array_push($this->_dcStack, $name);
- $this->_dcCounter[$name] = isset($this->_dcCounter[$name]) ? $this->_dcCounter[$name]+1 : 1;
- }
- if (count($this->_dcStack) != 0) {
- return true;
- }
-
- if (in_array($name, $this->deleteTags)) {
- return true;
- }
-
- if (!preg_match("/^[a-z0-9]+$/i", $name)) {
- if (preg_match("!(?:\@|://)!i", $name)) {
- $this->_xhtml .= '<' . $name . '>';
- }
- return true;
- }
-
- if (in_array($name, $this->singleTags)) {
- $this->_xhtml .= '<' . $name;
- $this->_writeAttrs($attrs);
- $this->_xhtml .= ' />';
- return true;
- }
-
- // TABLES: cannot open table elements when we are not inside table
- if ((isset($this->_counter['table'])) && ($this->_counter['table'] <= 0)
- && (in_array($name, $this->tableTags)))
- {
- return true;
- }
-
- // PARAGRAPHS: close paragraph when closeParagraph tags opening
- if ((in_array($name, $this->closeParagraph)) && (in_array('p', $this->_stack))) {
- $this->_closeHandler($parser, 'p');
- }
-
- // LISTS: we should close <li> if <li> of the same level opening
- if ($name == 'li' && count($this->_liStack) &&
- $this->_listScope == $this->_liStack[count($this->_liStack)-1])
- {
- $this->_closeHandler($parser, 'li');
- }
-
- // LISTS: we want to know on what nesting level of lists we are
- if (in_array($name, $this->listTags)) {
- $this->_listScope++;
- }
- if ($name == 'li') {
- array_push($this->_liStack, $this->_listScope);
- }
-
- $this->_xhtml .= '<' . $name;
- $this->_writeAttrs($attrs,$name);
- $this->_xhtml .= '>';
- array_push($this->_stack,$name);
- $this->_counter[$name] = isset($this->_counter[$name]) ? $this->_counter[$name]+1 : 1;
- return true;
- }
-
- function _closeHandler(&$parser, $name)
- {
-
- $name = strtolower($name);
-
- if (isset($this->_dcCounter[$name]) && ($this->_dcCounter[$name] > 0) &&
- (in_array($name, $this->deleteTagsContent)))
- {
- while ($name != ($tag = array_pop($this->_dcStack))) {
- $this->_dcCounter[$tag]--;
- }
-
- $this->_dcCounter[$name]--;
- }
-
- if (count($this->_dcStack) != 0) {
- return true;
- }
-
- if ((isset($this->_counter[$name])) && ($this->_counter[$name] > 0)) {
- while ($name != ($tag = array_pop($this->_stack))) {
- $this->_closeTag($tag);
- }
-
- $this->_closeTag($name);
- }
- return true;
- }
-
- function _closeTag($tag)
- {
- if (!in_array($tag, $this->noClose)) {
- $this->_xhtml .= '</' . $tag . '>';
- }
-
- $this->_counter[$tag]--;
-
- if (in_array($tag, $this->listTags)) {
- $this->_listScope--;
- }
-
- if ($tag == 'li') {
- array_pop($this->_liStack);
- }
- return true;
- }
-
- function _dataHandler(&$parser, $data)
- {
- if (count($this->_dcStack) == 0) {
- $this->_xhtml .= $data;
- }
- return true;
- }
-
- function _escapeHandler(&$parser, $data)
- {
- return true;
- }
-
- function getXHTML ()
- {
- while ($tag = array_pop($this->_stack)) {
- $this->_closeTag($tag);
- }
-
- return $this->_xhtml;
- }
-
- function clear()
- {
- $this->_xhtml = '';
- return true;
- }
-
- function parse($doc)
- {
-
- // Save all '<' symbols
- $doc = preg_replace("/<(?=[^a-zA-Z\/\!\?\%])/", '<', $doc);
-
- // Web documents shouldn't contains \x00 symbol
- $doc = str_replace("\x00", '', $doc);
-
- // Opera6 bug workaround
- $doc = str_replace("\xC0\xBC", '<', $doc);
-
- // UTF-7 encoding ASCII decode
- $doc = $this->repackUTF7($doc);
-
- // Instantiate the parser
- $parser= new XML_HTMLSax3();
-
- // Set up the parser
- $parser->set_object($this);
+ /**
+ * Escape handler - called from HTMLSax
+ *
+ * @param object $parser HTML parser
+ * @param string $data comments or other type of data
+ * @return boolean
+ * @access private
+ */
+ function _escapeHandler(&$parser, $data)
+ {
+ return true;
+ }
+
+ /**
+ * Returns the XHTML document
+ *
+ * @return string Processed (X)HTML document
+ * @access public
+ */
+ function getXHTML ()
+ {
+ while ($tag = array_pop($this->_stack)) {
+ $this->_closeTag($tag);
+ }
+
+ return $this->_xhtml;
+ }
+
+ /**
+ * Clears current document data
+ *
+ * @return boolean
+ * @access public
+ */
+ function clear()
+ {
+ $this->_xhtml = '';
+ return true;
+ }
+
+ /**
+ * Main parsing fuction
+ *
+ * @param string $doc HTML document for processing
+ * @return string Processed (X)HTML document
+ * @access public
+ */
+ function parse($doc)
+ {
- $parser->set_element_handler('_openHandler','_closeHandler');
- $parser->set_data_handler('_dataHandler');
- $parser->set_escape_handler('_escapeHandler');
+ // Save all '<' symbols
+ $doc = preg_replace("/<(?=[^a-zA-Z\/\!\?\%])/", '<', $doc);
- $parser->parse($doc);
+ // Web documents shouldn't contains \x00 symbol
+ $doc = str_replace("\x00", '', $doc);
- return $this->getXHTML();
+ // Opera6 bug workaround
+ $doc = str_replace("\xC0\xBC", '<', $doc);
- }
+ if ($this->repackUTF7) {
+ // UTF-7 encoding ASCII decode
+ $doc = $this->repackUTF7($doc);
+ }
+
+ // Instantiate the parser
+ $parser = new XML_HTMLSax3();
+
+ // Set up the parser
+ $parser->set_object($this);
+
+ $parser->set_element_handler('_openHandler','_closeHandler');
+ $parser->set_data_handler('_dataHandler');
+ $parser->set_escape_handler('_escapeHandler');
+
+ $parser->parse($doc);
+ return $this->getXHTML();
+
+ }
+
+
+ /**
+ * UTF-7 decoding fuction
+ *
+ * @param string $str HTML document for recode ASCII part of UTF-7 back to ASCII
+ * @return string Decoded document
+ * @access private
+ */
function repackUTF7($str)
{
return preg_replace_callback('!\+([0-9a-zA-Z/]+)\-!', array($this, 'repackUTF7Callback'), $str);
}
+ /**
+ * Additional UTF-7 decoding fuction
+ *
+ * @param string $str String for recode ASCII part of UTF-7 back to ASCII
+ * @return string Recoded string
+ * @access private
+ */
function repackUTF7Callback($str)
{
$str = base64_decode($str[1]);
return preg_replace('/\x00(.)/', '$1', $str);
}
+ /**
+ * Additional UTF-7 encoding fuction
+ *
+ * @param string $str String for recode ASCII part of UTF-7 back to ASCII
+ * @return string Recoded string
+ * @access private
+ */
function repackUTF7Back($str)
{
return $str[1].'+'.rtrim(base64_encode($str[2]), '=').'-';
}
}
-
-?>
dépôts / lhc / web / www.git / blobdiff