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-rw-r--r--program/lib/Roundcube/rcube_html2text.php (renamed from program/lib/html2text.php)384
-rw-r--r--program/lib/Roundcube/rcube_message.php2
-rw-r--r--program/lib/Roundcube/rcube_spellchecker.php2
-rw-r--r--program/lib/Roundcube/rcube_string_replacer.php27
-rw-r--r--program/lib/Roundcube/rcube_washtml.php451
-rw-r--r--program/lib/washtml.php330
6 files changed, 639 insertions, 557 deletions
diff --git a/program/lib/html2text.php b/program/lib/Roundcube/rcube_html2text.php
index 34c719302..0b172ebfa 100644
--- a/program/lib/html2text.php
+++ b/program/lib/Roundcube/rcube_html2text.php
@@ -1,35 +1,23 @@
<?php
-/*************************************************************************
- * *
- * class.html2text.inc *
- * *
- *************************************************************************
- * *
- * Converts HTML to formatted plain text *
- * *
- * Copyright (c) 2005-2007 Jon Abernathy <jon@chuggnutt.com> *
- * All rights reserved. *
- * *
- * This script is free software; you can redistribute it and/or modify *
- * it under the terms of the GNU General Public License as published by *
- * the Free Software Foundation; either version 2 of the License, or *
- * (at your option) any later version. *
- * *
- * The GNU General Public License can be found at *
- * http://www.gnu.org/copyleft/gpl.html. *
- * *
- * This script is distributed in the hope that it will be useful, *
- * but WITHOUT ANY WARRANTY; without even the implied warranty of *
- * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the *
- * GNU General Public License for more details. *
- * *
- * Author(s): Jon Abernathy <jon@chuggnutt.com> *
- * *
- * Last modified: 08/08/07 *
- * *
- *************************************************************************/
-
+/**
+ +-----------------------------------------------------------------------+
+ | This file is part of the Roundcube Webmail client |
+ | Copyright (C) 2008-2012, The Roundcube Dev Team |
+ | Copyright (c) 2005-2007, Jon Abernathy <jon@chuggnutt.com> |
+ | |
+ | Licensed under the GNU General Public License version 3 or |
+ | any later version with exceptions for skins & plugins. |
+ | See the README file for a full license statement. |
+ | |
+ | PURPOSE: |
+ | Converts HTML to formatted plain text (based on html2text class) |
+ +-----------------------------------------------------------------------+
+ | Author: Thomas Bruederli <roundcube@gmail.com> |
+ | Author: Aleksander Machniak <alec@alec.pl> |
+ | Author: Jon Abernathy <jon@chuggnutt.com> |
+ +-----------------------------------------------------------------------+
+ */
/**
* Takes HTML and converts it to formatted, plain text.
@@ -99,58 +87,55 @@
* future time.
*
* *** End of the housecleaning updates. Updated 08/08/07.
+ */
+
+/**
+ * Converts HTML to formatted plain text
*
- * @author Jon Abernathy <jon@chuggnutt.com>
- * @version 1.0.0
- * @since PHP 4.0.2
+ * @package Framework
+ * @subpackage Utils
*/
-class html2text
+class rcube_html2text
{
-
/**
- * Contains the HTML content to convert.
+ * Contains the HTML content to convert.
*
- * @var string $html
- * @access public
+ * @var string $html
*/
- var $html;
+ protected $html;
/**
- * Contains the converted, formatted text.
+ * Contains the converted, formatted text.
*
- * @var string $text
- * @access public
+ * @var string $text
*/
- var $text;
+ protected $text;
/**
- * Maximum width of the formatted text, in columns.
+ * Maximum width of the formatted text, in columns.
*
- * Set this value to 0 (or less) to ignore word wrapping
- * and not constrain text to a fixed-width column.
+ * Set this value to 0 (or less) to ignore word wrapping
+ * and not constrain text to a fixed-width column.
*
- * @var integer $width
- * @access public
+ * @var integer $width
*/
- var $width = 70;
+ protected $width = 70;
/**
- * Target character encoding for output text
+ * Target character encoding for output text
*
- * @var string $charset
- * @access public
+ * @var string $charset
*/
- var $charset = 'UTF-8';
+ protected $charset = 'UTF-8';
/**
- * List of preg* regular expression patterns to search for,
- * used in conjunction with $replace.
+ * List of preg* regular expression patterns to search for,
+ * used in conjunction with $replace.
*
- * @var array $search
- * @access public
- * @see $replace
+ * @var array $search
+ * @see $replace
*/
- var $search = array(
+ protected $search = array(
"/\r/", // Non-legal carriage return
"/[\n\t]+/", // Newlines and tabs
'/<head[^>]*>.*?<\/head>/i', // <head>
@@ -172,13 +157,12 @@ class html2text
);
/**
- * List of pattern replacements corresponding to patterns searched.
+ * List of pattern replacements corresponding to patterns searched.
*
- * @var array $replace
- * @access public
- * @see $search
+ * @var array $replace
+ * @see $search
*/
- var $replace = array(
+ protected $replace = array(
'', // Non-legal carriage return
' ', // Newlines and tabs
'', // <head>
@@ -200,14 +184,13 @@ class html2text
);
/**
- * List of preg* regular expression patterns to search for,
- * used in conjunction with $ent_replace.
+ * List of preg* regular expression patterns to search for,
+ * used in conjunction with $ent_replace.
*
- * @var array $ent_search
- * @access public
- * @see $ent_replace
+ * @var array $ent_search
+ * @see $ent_replace
*/
- var $ent_search = array(
+ protected $ent_search = array(
'/&(nbsp|#160);/i', // Non-breaking space
'/&(quot|rdquo|ldquo|#8220|#8221|#147|#148);/i',
// Double quotes
@@ -227,13 +210,12 @@ class html2text
);
/**
- * List of pattern replacements corresponding to patterns searched.
+ * List of pattern replacements corresponding to patterns searched.
*
- * @var array $ent_replace
- * @access public
- * @see $ent_search
+ * @var array $ent_replace
+ * @see $ent_search
*/
- var $ent_replace = array(
+ protected $ent_replace = array(
' ', // Non-breaking space
'"', // Double quotes
"'", // Single quotes
@@ -252,13 +234,12 @@ class html2text
);
/**
- * List of preg* regular expression patterns to search for
- * and replace using callback function.
+ * List of preg* regular expression patterns to search for
+ * and replace using callback function.
*
- * @var array $callback_search
- * @access public
+ * @var array $callback_search
*/
- var $callback_search = array(
+ protected $callback_search = array(
'/<(a) [^>]*href=("|\')([^"\']+)\2[^>]*>(.*?)<\/a>/i', // <a href="">
'/<(h)[123456]( [^>]*)?>(.*?)<\/h[123456]>/i', // h1 - h6
'/<(b)( [^>]*)?>(.*?)<\/b>/i', // <b>
@@ -267,14 +248,13 @@ class html2text
);
/**
- * List of preg* regular expression patterns to search for in PRE body,
- * used in conjunction with $pre_replace.
+ * List of preg* regular expression patterns to search for in PRE body,
+ * used in conjunction with $pre_replace.
*
- * @var array $pre_search
- * @access public
- * @see $pre_replace
+ * @var array $pre_search
+ * @see $pre_replace
*/
- var $pre_search = array(
+ protected $pre_search = array(
"/\n/",
"/\t/",
'/ /',
@@ -283,13 +263,12 @@ class html2text
);
/**
- * List of pattern replacements corresponding to patterns searched for PRE body.
+ * List of pattern replacements corresponding to patterns searched for PRE body.
*
- * @var array $pre_replace
- * @access public
- * @see $pre_search
+ * @var array $pre_replace
+ * @see $pre_search
*/
- var $pre_replace = array(
+ protected $pre_replace = array(
'<br>',
'&nbsp;&nbsp;&nbsp;&nbsp;',
'&nbsp;',
@@ -298,103 +277,95 @@ class html2text
);
/**
- * Contains a list of HTML tags to allow in the resulting text.
+ * Contains a list of HTML tags to allow in the resulting text.
*
- * @var string $allowed_tags
- * @access public
- * @see set_allowed_tags()
+ * @var string $allowed_tags
+ * @see set_allowed_tags()
*/
- var $allowed_tags = '';
+ protected $allowed_tags = '';
/**
- * Contains the base URL that relative links should resolve to.
+ * Contains the base URL that relative links should resolve to.
*
- * @var string $url
- * @access public
+ * @var string $url
*/
- var $url;
+ protected $url;
/**
- * Indicates whether content in the $html variable has been converted yet.
+ * Indicates whether content in the $html variable has been converted yet.
*
- * @var boolean $_converted
- * @access private
- * @see $html, $text
+ * @var boolean $_converted
+ * @see $html, $text
*/
- var $_converted = false;
+ protected $_converted = false;
/**
- * Contains URL addresses from links to be rendered in plain text.
+ * Contains URL addresses from links to be rendered in plain text.
*
- * @var array $_link_list
- * @access private
- * @see _build_link_list()
+ * @var array $_link_list
+ * @see _build_link_list()
*/
- var $_link_list = array();
+ protected $_link_list = array();
/**
* Boolean flag, true if a table of link URLs should be listed after the text.
*
* @var boolean $_do_links
- * @access private
- * @see html2text()
+ * @see __construct()
*/
- var $_do_links = true;
+ protected $_do_links = true;
/**
- * Constructor.
+ * Constructor.
*
- * If the HTML source string (or file) is supplied, the class
- * will instantiate with that source propagated, all that has
- * to be done it to call get_text().
+ * If the HTML source string (or file) is supplied, the class
+ * will instantiate with that source propagated, all that has
+ * to be done it to call get_text().
*
- * @param string $source HTML content
- * @param boolean $from_file Indicates $source is a file to pull content from
- * @param boolean $do_links Indicate whether a table of link URLs is desired
- * @param integer $width Maximum width of the formatted text, 0 for no limit
- * @access public
- * @return void
+ * @param string $source HTML content
+ * @param boolean $from_file Indicates $source is a file to pull content from
+ * @param boolean $do_links Indicate whether a table of link URLs is desired
+ * @param integer $width Maximum width of the formatted text, 0 for no limit
*/
- function html2text( $source = '', $from_file = false, $do_links = true, $width = 75, $charset = 'UTF-8' )
+ function __construct($source = '', $from_file = false, $do_links = true, $width = 75, $charset = 'UTF-8')
{
- if ( !empty($source) ) {
+ if (!empty($source)) {
$this->set_html($source, $from_file);
}
$this->set_base_url();
+
$this->_do_links = $do_links;
- $this->width = $width;
- $this->charset = $charset;
+ $this->width = $width;
+ $this->charset = $charset;
}
/**
- * Loads source HTML into memory, either from $source string or a file.
+ * Loads source HTML into memory, either from $source string or a file.
*
- * @param string $source HTML content
- * @param boolean $from_file Indicates $source is a file to pull content from
- * @access public
- * @return void
+ * @param string $source HTML content
+ * @param boolean $from_file Indicates $source is a file to pull content from
*/
- function set_html( $source, $from_file = false )
+ function set_html($source, $from_file = false)
{
- if ( $from_file && file_exists($source) ) {
+ if ($from_file && file_exists($source)) {
$this->html = file_get_contents($source);
}
- else
+ else {
$this->html = $source;
+ }
$this->_converted = false;
}
/**
- * Returns the text, converted from HTML.
+ * Returns the text, converted from HTML.
*
- * @access public
- * @return string
+ * @return string Plain text
*/
function get_text()
{
- if ( !$this->_converted ) {
+ if (!$this->_converted) {
$this->_convert();
}
@@ -402,10 +373,7 @@ class html2text
}
/**
- * Prints the text, converted from HTML.
- *
- * @access public
- * @return void
+ * Prints the text, converted from HTML.
*/
function print_text()
{
@@ -413,50 +381,34 @@ class html2text
}
/**
- * Alias to print_text(), operates identically.
- *
- * @access public
- * @return void
- * @see print_text()
- */
- function p()
- {
- print $this->get_text();
- }
-
- /**
- * Sets the allowed HTML tags to pass through to the resulting text.
+ * Sets the allowed HTML tags to pass through to the resulting text.
*
- * Tags should be in the form "<p>", with no corresponding closing tag.
- *
- * @access public
- * @return void
+ * Tags should be in the form "<p>", with no corresponding closing tag.
*/
- function set_allowed_tags( $allowed_tags = '' )
+ function set_allowed_tags($allowed_tags = '')
{
- if ( !empty($allowed_tags) ) {
+ if (!empty($allowed_tags)) {
$this->allowed_tags = $allowed_tags;
}
}
/**
- * Sets a base URL to handle relative links.
- *
- * @access public
- * @return void
+ * Sets a base URL to handle relative links.
*/
- function set_base_url( $url = '' )
+ function set_base_url($url = '')
{
- if ( empty($url) ) {
- if ( !empty($_SERVER['HTTP_HOST']) ) {
+ if (empty($url)) {
+ if (!empty($_SERVER['HTTP_HOST'])) {
$this->url = 'http://' . $_SERVER['HTTP_HOST'];
- } else {
+ }
+ else {
$this->url = '';
}
- } else {
+ }
+ else {
// Strip any trailing slashes for consistency (relative
// URLs may already start with a slash like "/file.html")
- if ( substr($url, -1) == '/' ) {
+ if (substr($url, -1) == '/') {
$url = substr($url, 0, -1);
}
$this->url = $url;
@@ -464,12 +416,9 @@ class html2text
}
/**
- * Workhorse function that does actual conversion (calls _converter() method).
- *
- * @access private
- * @return void
+ * Workhorse function that does actual conversion (calls _converter() method).
*/
- function _convert()
+ protected function _convert()
{
// Variables used for building the link list
$this->_link_list = array();
@@ -487,25 +436,21 @@ class html2text
}
}
- $this->text = $text;
-
+ $this->text = $text;
$this->_converted = true;
}
/**
- * Workhorse function that does actual conversion.
+ * Workhorse function that does actual conversion.
*
- * First performs custom tag replacement specified by $search and
- * $replace arrays. Then strips any remaining HTML tags, reduces whitespace
- * and newlines to a readable format, and word wraps the text to
- * $width characters.
+ * First performs custom tag replacement specified by $search and
+ * $replace arrays. Then strips any remaining HTML tags, reduces whitespace
+ * and newlines to a readable format, and word wraps the text to
+ * $width characters.
*
- * @param string Reference to HTML content string
- *
- * @access private
- * @return void
+ * @param string Reference to HTML content string
*/
- function _converter(&$text)
+ protected function _converter(&$text)
{
// Convert <BLOCKQUOTE> (before PRE!)
$this->_convert_blockquotes($text);
@@ -517,7 +462,7 @@ class html2text
$text = preg_replace($this->search, $this->replace, $text);
// Run our defined tags search-and-replace with callback
- $text = preg_replace_callback($this->callback_search, array('html2text', '_preg_callback'), $text);
+ $text = preg_replace_callback($this->callback_search, array($this, 'tags_preg_callback'), $text);
// Strip any other HTML tags
$text = strip_tags($text, $this->allowed_tags);
@@ -551,19 +496,17 @@ class html2text
}
/**
- * Helper function called by preg_replace() on link replacement.
+ * Helper function called by preg_replace() on link replacement.
*
- * Maintains an internal list of links to be displayed at the end of the
- * text, with numeric indices to the original point in the text they
- * appeared. Also makes an effort at identifying and handling absolute
- * and relative links.
+ * Maintains an internal list of links to be displayed at the end of the
+ * text, with numeric indices to the original point in the text they
+ * appeared. Also makes an effort at identifying and handling absolute
+ * and relative links.
*
- * @param string $link URL of the link
- * @param string $display Part of the text to associate number with
- * @access private
- * @return string
+ * @param string $link URL of the link
+ * @param string $display Part of the text to associate number with
*/
- function _build_link_list( $link, $display )
+ protected function _build_link_list( $link, $display )
{
if (!$this->_do_links || empty($link)) {
return $display;
@@ -594,12 +537,11 @@ class html2text
}
/**
- * Helper function for PRE body conversion.
+ * Helper function for PRE body conversion.
*
- * @param string HTML content
- * @access private
+ * @param string HTML content
*/
- function _convert_pre(&$text)
+ protected function _convert_pre(&$text)
{
// get the content of PRE element
while (preg_match('/<pre[^>]*>(.*)<\/pre>/ismU', $text, $matches)) {
@@ -607,7 +549,7 @@ class html2text
// Run our defined tags search-and-replace with callback
$this->pre_content = preg_replace_callback($this->callback_search,
- array('html2text', '_preg_callback'), $this->pre_content);
+ array($this, 'tags_preg_callback'), $this->pre_content);
// convert the content
$this->pre_content = sprintf('<div><br>%s<br></div>',
@@ -615,7 +557,7 @@ class html2text
// replace the content (use callback because content can contain $0 variable)
$text = preg_replace_callback('/<pre[^>]*>.*<\/pre>/ismU',
- array('html2text', '_preg_pre_callback'), $text, 1);
+ array($this, 'pre_preg_callback'), $text, 1);
// free memory
$this->pre_content = '';
@@ -623,12 +565,11 @@ class html2text
}
/**
- * Helper function for BLOCKQUOTE body conversion.
+ * Helper function for BLOCKQUOTE body conversion.
*
- * @param string HTML content
- * @access private
+ * @param string HTML content
*/
- function _convert_blockquotes(&$text)
+ protected function _convert_blockquotes(&$text)
{
if (preg_match_all('/<\/*blockquote[^>]*>/i', $text, $matches, PREG_OFFSET_CAPTURE)) {
$level = 0;
@@ -679,12 +620,12 @@ class html2text
}
/**
- * Callback function for preg_replace_callback use.
+ * Callback function for preg_replace_callback use.
*
- * @param array PREG matches
- * @return string
+ * @param array PREG matches
+ * @return string
*/
- private function _preg_callback($matches)
+ public function tags_preg_callback($matches)
{
switch (strtolower($matches[1])) {
case 'b':
@@ -702,12 +643,12 @@ class html2text
}
/**
- * Callback function for preg_replace_callback use in PRE content handler.
+ * Callback function for preg_replace_callback use in PRE content handler.
*
- * @param array PREG matches
- * @return string
+ * @param array PREG matches
+ * @return string
*/
- private function _preg_pre_callback($matches)
+ public function pre_preg_callback($matches)
{
return $this->pre_content;
}
@@ -742,12 +683,7 @@ class html2text
private function _strtoupper($str)
{
$str = html_entity_decode($str, ENT_COMPAT, $this->charset);
-
- if (function_exists('mb_strtoupper'))
- $str = mb_strtoupper($str);
- else
- $str = strtoupper($str);
-
+ $str = mb_strtoupper($str);
$str = htmlspecialchars($str, ENT_COMPAT, $this->charset);
return $str;
diff --git a/program/lib/Roundcube/rcube_message.php b/program/lib/Roundcube/rcube_message.php
index c45dbfcd0..9fea8382a 100644
--- a/program/lib/Roundcube/rcube_message.php
+++ b/program/lib/Roundcube/rcube_message.php
@@ -272,7 +272,7 @@ class rcube_message
$out = $this->get_part_content($mime_id);
// create instance of html2text class
- $txt = new html2text($out);
+ $txt = new rcube_html2text($out);
return $txt->get_text();
}
}
diff --git a/program/lib/Roundcube/rcube_spellchecker.php b/program/lib/Roundcube/rcube_spellchecker.php
index e9e1ceb0f..3d4d3a3d6 100644
--- a/program/lib/Roundcube/rcube_spellchecker.php
+++ b/program/lib/Roundcube/rcube_spellchecker.php
@@ -443,7 +443,7 @@ class rcube_spellchecker
private function html2text($text)
{
- $h2t = new html2text($text, false, true, 0);
+ $h2t = new rcube_html2text($text, false, true, 0);
return $h2t->get_text();
}
diff --git a/program/lib/Roundcube/rcube_string_replacer.php b/program/lib/Roundcube/rcube_string_replacer.php
index 0fe982b26..6b289886b 100644
--- a/program/lib/Roundcube/rcube_string_replacer.php
+++ b/program/lib/Roundcube/rcube_string_replacer.php
@@ -36,7 +36,7 @@ class rcube_string_replacer
// Support unicode/punycode in top-level domain part
$utf_domain = '[^?&@"\'\\/()\s\r\t\n]+\\.?([^\\x00-\\x2f\\x3b-\\x40\\x5b-\\x60\\x7b-\\x7f]{2,}|xn--[a-zA-Z0-9]{2,})';
$url1 = '.:;,';
- $url2 = 'a-zA-Z0-9%=#$@+?!&\\/_~\\[\\]{}\*-';
+ $url2 = 'a-zA-Z0-9%=#$@+?!&\\/_~\\[\\]\\(\\){}\*-';
$this->link_pattern = "/([\w]+:\/\/|\W[Ww][Ww][Ww]\.|^[Ww][Ww][Ww]\.)($utf_domain([$url1]?[$url2]+)*)/";
$this->mailto_pattern = "/("
@@ -161,6 +161,9 @@ class rcube_string_replacer
// "http://example.com/?a[b]=c". However we need to handle
// properly situation when a bracket is placed at the end
// of the link e.g. "[http://example.com]"
+ // Yes, this is not perfect handles correctly only paired characters
+ // but it should work for common cases
+
if (preg_match('/(\\[|\\])/', $url)) {
$in = false;
for ($i=0, $len=strlen($url); $i<$len; $i++) {
@@ -182,6 +185,28 @@ class rcube_string_replacer
}
}
+ // Do the same for parentheses
+ if (preg_match('/(\\(|\\))/', $url)) {
+ $in = false;
+ for ($i=0, $len=strlen($url); $i<$len; $i++) {
+ if ($url[$i] == '(') {
+ if ($in)
+ break;
+ $in = true;
+ }
+ else if ($url[$i] == ')') {
+ if (!$in)
+ break;
+ $in = false;
+ }
+ }
+
+ if ($i < $len) {
+ $suffix = substr($url, $i);
+ $url = substr($url, 0, $i);
+ }
+ }
+
return $suffix;
}
}
diff --git a/program/lib/Roundcube/rcube_washtml.php b/program/lib/Roundcube/rcube_washtml.php
new file mode 100644
index 000000000..715c46047
--- /dev/null
+++ b/program/lib/Roundcube/rcube_washtml.php
@@ -0,0 +1,451 @@
+<?php
+
+/**
+ +-----------------------------------------------------------------------+
+ | This file is part of the Roundcube Webmail client |
+ | Copyright (C) 2008-2012, The Roundcube Dev Team |
+ | |
+ | Licensed under the GNU General Public License version 3 or |
+ | any later version with exceptions for skins & plugins. |
+ | See the README file for a full license statement. |
+ | |
+ | PURPOSE: |
+ | Utility class providing HTML sanityzer (based on Washtml class) |
+ +-----------------------------------------------------------------------+
+ | Author: Thomas Bruederli <roundcube@gmail.com> |
+ | Author: Aleksander Machniak <alec@alec.pl> |
+ | Author: Frederic Motte <fmotte@ubixis.com> |
+ +-----------------------------------------------------------------------+
+ */
+
+/**
+ * Washtml, a HTML sanityzer.
+ *
+ * Copyright (c) 2007 Frederic Motte <fmotte@ubixis.com>
+ * All rights reserved.
+ *
+ * Redistribution and use in source and binary forms, with or without
+ * modification, are permitted provided that the following conditions
+ * are met:
+ * 1. Redistributions of source code must retain the above copyright
+ * notice, this list of conditions and the following disclaimer.
+ * 2. Redistributions in binary form must reproduce the above copyright
+ * notice, this list of conditions and the following disclaimer in the
+ * documentation and/or other materials provided with the distribution.
+ *
+ * THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``AS IS'' AND ANY EXPRESS OR
+ * IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES
+ * OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED.
+ * IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR ANY DIRECT, INDIRECT,
+ * INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT
+ * NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
+ * DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
+ * THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
+ * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF
+ * THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
+ *
+ * OVERVIEW:
+ *
+ * Wahstml take an untrusted HTML and return a safe html string.
+ *
+ * SYNOPSIS:
+ *
+ * $washer = new washtml($config);
+ * $washer->wash($html);
+ * It return a sanityzed string of the $html parameter without html and head tags.
+ * $html is a string containing the html code to wash.
+ * $config is an array containing options:
+ * $config['allow_remote'] is a boolean to allow link to remote images.
+ * $config['blocked_src'] string with image-src to be used for blocked remote images
+ * $config['show_washed'] is a boolean to include washed out attributes as x-washed
+ * $config['cid_map'] is an array where cid urls index urls to replace them.
+ * $config['charset'] is a string containing the charset of the HTML document if it is not defined in it.
+ * $washer->extlinks is a reference to a boolean that is set to true if remote images were removed. (FE: show remote images link)
+ *
+ * INTERNALS:
+ *
+ * Only tags and attributes in the static lists $html_elements and $html_attributes
+ * are kept, inline styles are also filtered: all style identifiers matching
+ * /[a-z\-]/i are allowed. Values matching colors, sizes, /[a-z\-]/i and safe
+ * urls if allowed and cid urls if mapped are kept.
+ *
+ * Roundcube Changes:
+ * - added $block_elements
+ * - changed $ignore_elements behaviour
+ * - added RFC2397 support
+ * - base URL support
+ * - invalid HTML comments removal before parsing
+ * - "fixing" unitless CSS values for XHTML output
+ * - base url resolving
+ */
+
+/**
+ * Utility class providing HTML sanityzer
+ *
+ * @package Framework
+ * @subpackage Utils
+ */
+class rcube_washtml
+{
+ /* Allowed HTML elements (default) */
+ static $html_elements = array('a', 'abbr', 'acronym', 'address', 'area', 'b',
+ 'basefont', 'bdo', 'big', 'blockquote', 'br', 'caption', 'center',
+ 'cite', 'code', 'col', 'colgroup', 'dd', 'del', 'dfn', 'dir', 'div', 'dl',
+ 'dt', 'em', 'fieldset', 'font', 'h1', 'h2', 'h3', 'h4', 'h5', 'h6', 'hr', 'i',
+ 'ins', 'label', 'legend', 'li', 'map', 'menu', 'nobr', 'ol', 'p', 'pre', 'q',
+ 's', 'samp', 'small', 'span', 'strike', 'strong', 'sub', 'sup', 'table',
+ 'tbody', 'td', 'tfoot', 'th', 'thead', 'tr', 'tt', 'u', 'ul', 'var', 'wbr', 'img',
+ // form elements
+ 'button', 'input', 'textarea', 'select', 'option', 'optgroup'
+ );
+
+ /* Ignore these HTML tags and their content */
+ static $ignore_elements = array('script', 'applet', 'embed', 'object', 'style');
+
+ /* Allowed HTML attributes */
+ static $html_attribs = array('name', 'class', 'title', 'alt', 'width', 'height',
+ 'align', 'nowrap', 'col', 'row', 'id', 'rowspan', 'colspan', 'cellspacing',
+ 'cellpadding', 'valign', 'bgcolor', 'color', 'border', 'bordercolorlight',
+ 'bordercolordark', 'face', 'marginwidth', 'marginheight', 'axis', 'border',
+ 'abbr', 'char', 'charoff', 'clear', 'compact', 'coords', 'vspace', 'hspace',
+ 'cellborder', 'size', 'lang', 'dir', 'usemap', 'shape', 'media',
+ // attributes of form elements
+ 'type', 'rows', 'cols', 'disabled', 'readonly', 'checked', 'multiple', 'value'
+ );
+
+ /* Block elements which could be empty but cannot be returned in short form (<tag />) */
+ static $block_elements = array('div', 'p', 'pre', 'blockquote', 'a', 'font', 'center',
+ 'table', 'ul', 'h1', 'h2', 'h3', 'h4', 'h5', 'h6', 'ol', 'dl', 'strong',
+ 'i', 'b', 'u', 'span',
+ );
+
+ /* State for linked objects in HTML */
+ public $extlinks = false;
+
+ /* Current settings */
+ private $config = array();
+
+ /* Registered callback functions for tags */
+ private $handlers = array();
+
+ /* Allowed HTML elements */
+ private $_html_elements = array();
+
+ /* Ignore these HTML tags but process their content */
+ private $_ignore_elements = array();
+
+ /* Block elements which could be empty but cannot be returned in short form (<tag />) */
+ private $_block_elements = array();
+
+ /* Allowed HTML attributes */
+ private $_html_attribs = array();
+
+
+ /**
+ * Class constructor
+ */
+ public function __construct($p = array())
+ {
+ $this->_html_elements = array_flip((array)$p['html_elements']) + array_flip(self::$html_elements) ;
+ $this->_html_attribs = array_flip((array)$p['html_attribs']) + array_flip(self::$html_attribs);
+ $this->_ignore_elements = array_flip((array)$p['ignore_elements']) + array_flip(self::$ignore_elements);
+ $this->_block_elements = array_flip((array)$p['block_elements']) + array_flip(self::$block_elements);
+
+ unset($p['html_elements'], $p['html_attribs'], $p['ignore_elements'], $p['block_elements']);
+
+ $this->config = $p + array('show_washed' => true, 'allow_remote' => false, 'cid_map' => array());
+ }
+
+ /**
+ * Register a callback function for a certain tag
+ */
+ public function add_callback($tagName, $callback)
+ {
+ $this->handlers[$tagName] = $callback;
+ }
+
+ /**
+ * Check CSS style
+ */
+ private function wash_style($style)
+ {
+ $s = '';
+
+ foreach (explode(';', $style) as $declaration) {
+ if (preg_match('/^\s*([a-z\-]+)\s*:\s*(.*)\s*$/i', $declaration, $match)) {
+ $cssid = $match[1];
+ $str = $match[2];
+ $value = '';
+
+ while (sizeof($str) > 0 &&
+ preg_match('/^(url\(\s*[\'"]?([^\'"\)]*)[\'"]?\s*\)'./*1,2*/
+ '|rgb\(\s*[0-9]+\s*,\s*[0-9]+\s*,\s*[0-9]+\s*\)'.
+ '|-?[0-9.]+\s*(em|ex|px|cm|mm|in|pt|pc|deg|rad|grad|ms|s|hz|khz|%)?'.
+ '|#[0-9a-f]{3,6}'.
+ '|[a-z0-9", -]+'.
+ ')\s*/i', $str, $match)
+ ) {
+ if ($match[2]) {
+ if (($src = $this->config['cid_map'][$match[2]])
+ || ($src = $this->config['cid_map'][$this->config['base_url'].$match[2]])
+ ) {
+ $value .= ' url('.htmlspecialchars($src, ENT_QUOTES) . ')';
+ }
+ else if (preg_match('!^(https?:)?//[a-z0-9/._+-]+$!i', $match[2], $url)) {
+ if ($this->config['allow_remote']) {
+ $value .= ' url('.htmlspecialchars($url[0], ENT_QUOTES).')';
+ }
+ else {
+ $this->extlinks = true;
+ }
+ }
+ else if (preg_match('/^data:.+/i', $match[2])) { // RFC2397
+ $value .= ' url('.htmlspecialchars($match[2], ENT_QUOTES).')';
+ }
+ }
+ else {
+ // whitelist ?
+ $value .= ' ' . $match[0];
+
+ // #1488535: Fix size units, so width:800 would be changed to width:800px
+ if (preg_match('/(left|right|top|bottom|width|height)/i', $cssid)
+ && preg_match('/^[0-9]+$/', $match[0])
+ ) {
+ $value .= 'px';
+ }
+ }
+
+ $str = substr($str, strlen($match[0]));
+ }
+
+ if (isset($value[0])) {
+ $s .= ($s?' ':'') . $cssid . ':' . $value . ';';
+ }
+ }
+ }
+
+ return $s;
+ }
+
+ /**
+ * Take a node and return allowed attributes and check values
+ */
+ private function wash_attribs($node)
+ {
+ $t = '';
+ $washed = '';
+
+ foreach ($node->attributes as $key => $plop) {
+ $key = strtolower($key);
+ $value = $node->getAttribute($key);
+
+ if (isset($this->_html_attribs[$key]) ||
+ ($key == 'href' && !preg_match('!^(javascript|vbscript|data:text)!i', $value)
+ && preg_match('!^([a-z][a-z0-9.+-]+:|//|#).+!i', $value))
+ ) {
+ $t .= ' ' . $key . '="' . htmlspecialchars($value, ENT_QUOTES) . '"';
+ }
+ else if ($key == 'style' && ($style = $this->wash_style($value))) {
+ $quot = strpos($style, '"') !== false ? "'" : '"';
+ $t .= ' style=' . $quot . $style . $quot;
+ }
+ else if ($key == 'background' || ($key == 'src' && strtolower($node->tagName) == 'img')) { //check tagName anyway
+ if (($src = $this->config['cid_map'][$value])
+ || ($src = $this->config['cid_map'][$this->config['base_url'].$value])
+ ) {
+ $t .= ' ' . $key . '="' . htmlspecialchars($src, ENT_QUOTES) . '"';
+ }
+ else if (preg_match('/^(http|https|ftp):.+/i', $value)) {
+ if ($this->config['allow_remote']) {
+ $t .= ' ' . $key . '="' . htmlspecialchars($value, ENT_QUOTES) . '"';
+ }
+ else {
+ $this->extlinks = true;
+ if ($this->config['blocked_src']) {
+ $t .= ' ' . $key . '="' . htmlspecialchars($this->config['blocked_src'], ENT_QUOTES) . '"';
+ }
+ }
+ }
+ else if (preg_match('/^data:.+/i', $value)) { // RFC2397
+ $t .= ' ' . $key . '="' . htmlspecialchars($value, ENT_QUOTES) . '"';
+ }
+ }
+ else {
+ $washed .= ($washed ? ' ' : '') . $key;
+ }
+ }
+
+ return $t . ($washed && $this->config['show_washed'] ? ' x-washed="'.$washed.'"' : '');
+ }
+
+ /**
+ * The main loop that recurse on a node tree.
+ * It output only allowed tags with allowed attributes
+ * and allowed inline styles
+ */
+ private function dumpHtml($node)
+ {
+ if (!$node->hasChildNodes()) {
+ return '';
+ }
+
+ $node = $node->firstChild;
+ $dump = '';
+
+ do {
+ switch($node->nodeType) {
+ case XML_ELEMENT_NODE: //Check element
+ $tagName = strtolower($node->tagName);
+ if ($callback = $this->handlers[$tagName]) {
+ $dump .= call_user_func($callback, $tagName,
+ $this->wash_attribs($node), $this->dumpHtml($node), $this);
+ }
+ else if (isset($this->_html_elements[$tagName])) {
+ $content = $this->dumpHtml($node);
+ $dump .= '<' . $tagName . $this->wash_attribs($node) .
+ ($content != '' || isset($this->_block_elements[$tagName]) ? ">$content</$tagName>" : ' />');
+ }
+ else if (isset($this->_ignore_elements[$tagName])) {
+ $dump .= '<!-- ' . htmlspecialchars($tagName, ENT_QUOTES) . ' not allowed -->';
+ }
+ else {
+ $dump .= '<!-- ' . htmlspecialchars($tagName, ENT_QUOTES) . ' ignored -->';
+ $dump .= $this->dumpHtml($node); // ignore tags not its content
+ }
+ break;
+
+ case XML_CDATA_SECTION_NODE:
+ $dump .= $node->nodeValue;
+ break;
+
+ case XML_TEXT_NODE:
+ $dump .= htmlspecialchars($node->nodeValue);
+ break;
+
+ case XML_HTML_DOCUMENT_NODE:
+ $dump .= $this->dumpHtml($node);
+ break;
+
+ case XML_DOCUMENT_TYPE_NODE:
+ break;
+
+ default:
+ $dump . '<!-- node type ' . $node->nodeType . ' -->';
+ }
+ } while($node = $node->nextSibling);
+
+ return $dump;
+ }
+
+ /**
+ * Main function, give it untrusted HTML, tell it if you allow loading
+ * remote images and give it a map to convert "cid:" urls.
+ */
+ public function wash($html)
+ {
+ // Charset seems to be ignored (probably if defined in the HTML document)
+ $node = new DOMDocument('1.0', $this->config['charset']);
+ $this->extlinks = false;
+
+ $html = $this->cleanup($html);
+
+ // Find base URL for images
+ if (preg_match('/<base\s+href=[\'"]*([^\'"]+)/is', $html, $matches)) {
+ $this->config['base_url'] = $matches[1];
+ }
+ else {
+ $this->config['base_url'] = '';
+ }
+
+ @$node->loadHTML($html);
+ return $this->dumpHtml($node);
+ }
+
+ /**
+ * Getter for config parameters
+ */
+ public function get_config($prop)
+ {
+ return $this->config[$prop];
+ }
+
+ /**
+ * Clean HTML input
+ */
+ private function cleanup($html)
+ {
+ // special replacements (not properly handled by washtml class)
+ $html_search = array(
+ '/(<\/nobr>)(\s+)(<nobr>)/i', // space(s) between <NOBR>
+ '/<title[^>]*>[^<]*<\/title>/i', // PHP bug #32547 workaround: remove title tag
+ '/^(\0\0\xFE\xFF|\xFF\xFE\0\0|\xFE\xFF|\xFF\xFE|\xEF\xBB\xBF)/', // byte-order mark (only outlook?)
+ '/<html\s[^>]+>/i', // washtml/DOMDocument cannot handle xml namespaces
+ );
+
+ $html_replace = array(
+ '\\1'.' &nbsp; '.'\\3',
+ '',
+ '',
+ '<html>',
+ );
+ $html = preg_replace($html_search, $html_replace, trim($html));
+
+ // PCRE errors handling (#1486856), should we use something like for every preg_* use?
+ if ($html === null && ($preg_error = preg_last_error()) != PREG_NO_ERROR) {
+ $errstr = "Could not clean up HTML message! PCRE Error: $preg_error.";
+
+ if ($preg_error == PREG_BACKTRACK_LIMIT_ERROR) {
+ $errstr .= " Consider raising pcre.backtrack_limit!";
+ }
+ if ($preg_error == PREG_RECURSION_LIMIT_ERROR) {
+ $errstr .= " Consider raising pcre.recursion_limit!";
+ }
+
+ rcube::raise_error(array('code' => 620, 'type' => 'php',
+ 'line' => __LINE__, 'file' => __FILE__,
+ 'message' => $errstr), true, false);
+ return '';
+ }
+
+ // fix (unknown/malformed) HTML tags before "wash"
+ $html = preg_replace_callback('/(<[\/]*)([^\s>]+)/', array($this, 'html_tag_callback'), $html);
+
+ // Remove invalid HTML comments (#1487759)
+ // Don't remove valid conditional comments
+ $html = preg_replace('/<!--[^->[\n]*>/', '', $html);
+
+ // turn relative into absolute urls
+ $html = self::resolve_base($html);
+
+ return $html;
+ }
+
+ /**
+ * Callback function for HTML tags fixing
+ */
+ public static function html_tag_callback($matches)
+ {
+ $tagname = $matches[2];
+ $tagname = preg_replace(array(
+ '/:.*$/', // Microsoft's Smart Tags <st1:xxxx>
+ '/[^a-z0-9_\[\]\!-]/i', // forbidden characters
+ ), '', $tagname);
+
+ return $matches[1] . $tagname;
+ }
+
+ /**
+ * Convert all relative URLs according to a <base> in HTML
+ */
+ public static function resolve_base($body)
+ {
+ // check for <base href=...>
+ if (preg_match('!(<base.*href=["\']?)([hftps]{3,5}://[a-z0-9/.%-]+)!i', $body, $regs)) {
+ $replacer = new rcube_base_replacer($regs[2]);
+ $body = $replacer->replace($body);
+ }
+
+ return $body;
+ }
+}
+
diff --git a/program/lib/washtml.php b/program/lib/washtml.php
deleted file mode 100644
index d13d66404..000000000
--- a/program/lib/washtml.php
+++ /dev/null
@@ -1,330 +0,0 @@
-<?php
-/* Washtml, a HTML sanityzer.
- *
- * Copyright (c) 2007 Frederic Motte <fmotte@ubixis.com>
- * All rights reserved.
- *
- * Redistribution and use in source and binary forms, with or without
- * modification, are permitted provided that the following conditions
- * are met:
- * 1. Redistributions of source code must retain the above copyright
- * notice, this list of conditions and the following disclaimer.
- * 2. Redistributions in binary form must reproduce the above copyright
- * notice, this list of conditions and the following disclaimer in the
- * documentation and/or other materials provided with the distribution.
- *
- * THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``AS IS'' AND ANY EXPRESS OR
- * IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES
- * OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED.
- * IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR ANY DIRECT, INDIRECT,
- * INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT
- * NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
- * DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
- * THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
- * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF
- * THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
- */
-
-/* Please send me your comments about this code if you have some, thanks, Fred. */
-
-/* OVERVIEW:
- *
- * Wahstml take an untrusted HTML and return a safe html string.
- *
- * SYNOPSIS:
- *
- * $washer = new washtml($config);
- * $washer->wash($html);
- * It return a sanityzed string of the $html parameter without html and head tags.
- * $html is a string containing the html code to wash.
- * $config is an array containing options:
- * $config['allow_remote'] is a boolean to allow link to remote images.
- * $config['blocked_src'] string with image-src to be used for blocked remote images
- * $config['show_washed'] is a boolean to include washed out attributes as x-washed
- * $config['cid_map'] is an array where cid urls index urls to replace them.
- * $config['charset'] is a string containing the charset of the HTML document if it is not defined in it.
- * $washer->extlinks is a reference to a boolean that is set to true if remote images were removed. (FE: show remote images link)
- *
- * INTERNALS:
- *
- * Only tags and attributes in the static lists $html_elements and $html_attributes
- * are kept, inline styles are also filtered: all style identifiers matching
- * /[a-z\-]/i are allowed. Values matching colors, sizes, /[a-z\-]/i and safe
- * urls if allowed and cid urls if mapped are kept.
- *
- * BUGS: It MUST be safe !
- * - Check regexp
- * - urlencode URLs instead of htmlspecials
- * - Check is a 3 bytes utf8 first char can eat '">'
- * - Update PCRE: CVE-2007-1659 - CVE-2007-1660 - CVE-2007-1661 - CVE-2007-1662
- * CVE-2007-4766 - CVE-2007-4767 - CVE-2007-4768
- * http://lists.debian.org/debian-security-announce/debian-security-announce-2007/msg00177.html
- * - ...
- *
- * MISSING:
- * - relative links, can be implemented by prefixing an absolute path, ask me
- * if you need it...
- * - ...
- *
- * Dont be a fool:
- * - Dont alter data on a GET: '<img src="http://yourhost/mail?action=delete&uid=3267" />'
- * - ...
- *
- * Roundcube Changes:
- * - added $block_elements
- * - changed $ignore_elements behaviour
- * - added RFC2397 support
- * - base URL support
- * - invalid HTML comments removal before parsing
- * - "fixing" unitless CSS values for XHTML output
- */
-
-class washtml
-{
- /* Allowed HTML elements (default) */
- static $html_elements = array('a', 'abbr', 'acronym', 'address', 'area', 'b',
- 'basefont', 'bdo', 'big', 'blockquote', 'br', 'caption', 'center',
- 'cite', 'code', 'col', 'colgroup', 'dd', 'del', 'dfn', 'dir', 'div', 'dl',
- 'dt', 'em', 'fieldset', 'font', 'h1', 'h2', 'h3', 'h4', 'h5', 'h6', 'hr', 'i',
- 'ins', 'label', 'legend', 'li', 'map', 'menu', 'nobr', 'ol', 'p', 'pre', 'q',
- 's', 'samp', 'small', 'span', 'strike', 'strong', 'sub', 'sup', 'table',
- 'tbody', 'td', 'tfoot', 'th', 'thead', 'tr', 'tt', 'u', 'ul', 'var', 'wbr', 'img',
- // form elements
- 'button', 'input', 'textarea', 'select', 'option', 'optgroup'
- );
-
- /* Ignore these HTML tags and their content */
- static $ignore_elements = array('script', 'applet', 'embed', 'object', 'style');
-
- /* Allowed HTML attributes */
- static $html_attribs = array('name', 'class', 'title', 'alt', 'width', 'height',
- 'align', 'nowrap', 'col', 'row', 'id', 'rowspan', 'colspan', 'cellspacing',
- 'cellpadding', 'valign', 'bgcolor', 'color', 'border', 'bordercolorlight',
- 'bordercolordark', 'face', 'marginwidth', 'marginheight', 'axis', 'border',
- 'abbr', 'char', 'charoff', 'clear', 'compact', 'coords', 'vspace', 'hspace',
- 'cellborder', 'size', 'lang', 'dir', 'usemap', 'shape', 'media',
- // attributes of form elements
- 'type', 'rows', 'cols', 'disabled', 'readonly', 'checked', 'multiple', 'value'
- );
-
- /* Block elements which could be empty but cannot be returned in short form (<tag />) */
- static $block_elements = array('div', 'p', 'pre', 'blockquote', 'a', 'font', 'center',
- 'table', 'ul', 'h1', 'h2', 'h3', 'h4', 'h5', 'h6', 'ol', 'dl', 'strong', 'i', 'b', 'u', 'span');
-
- /* State for linked objects in HTML */
- public $extlinks = false;
-
- /* Current settings */
- private $config = array();
-
- /* Registered callback functions for tags */
- private $handlers = array();
-
- /* Allowed HTML elements */
- private $_html_elements = array();
-
- /* Ignore these HTML tags but process their content */
- private $_ignore_elements = array();
-
- /* Block elements which could be empty but cannot be returned in short form (<tag />) */
- private $_block_elements = array();
-
- /* Allowed HTML attributes */
- private $_html_attribs = array();
-
-
- /* Constructor */
- public function __construct($p = array())
- {
- $this->_html_elements = array_flip((array)$p['html_elements']) + array_flip(self::$html_elements) ;
- $this->_html_attribs = array_flip((array)$p['html_attribs']) + array_flip(self::$html_attribs);
- $this->_ignore_elements = array_flip((array)$p['ignore_elements']) + array_flip(self::$ignore_elements);
- $this->_block_elements = array_flip((array)$p['block_elements']) + array_flip(self::$block_elements);
- unset($p['html_elements'], $p['html_attribs'], $p['ignore_elements'], $p['block_elements']);
- $this->config = $p + array('show_washed'=>true, 'allow_remote'=>false, 'cid_map'=>array());
- }
-
- /* Register a callback function for a certain tag */
- public function add_callback($tagName, $callback)
- {
- $this->handlers[$tagName] = $callback;
- }
-
- /* Check CSS style */
- private function wash_style($style)
- {
- $s = '';
-
- foreach (explode(';', $style) as $declaration) {
- if (preg_match('/^\s*([a-z\-]+)\s*:\s*(.*)\s*$/i', $declaration, $match)) {
- $cssid = $match[1];
- $str = $match[2];
- $value = '';
-
- while (sizeof($str) > 0 &&
- preg_match('/^(url\(\s*[\'"]?([^\'"\)]*)[\'"]?\s*\)'./*1,2*/
- '|rgb\(\s*[0-9]+\s*,\s*[0-9]+\s*,\s*[0-9]+\s*\)'.
- '|-?[0-9.]+\s*(em|ex|px|cm|mm|in|pt|pc|deg|rad|grad|ms|s|hz|khz|%)?'.
- '|#[0-9a-f]{3,6}'.
- '|[a-z0-9", -]+'.
- ')\s*/i', $str, $match)
- ) {
- if ($match[2]) {
- if (($src = $this->config['cid_map'][$match[2]])
- || ($src = $this->config['cid_map'][$this->config['base_url'].$match[2]])) {
- $value .= ' url('.htmlspecialchars($src, ENT_QUOTES) . ')';
- }
- else if (preg_match('!^(https?:)?//[a-z0-9/._+-]+$!i', $match[2], $url)) {
- if ($this->config['allow_remote'])
- $value .= ' url('.htmlspecialchars($url[0], ENT_QUOTES).')';
- else
- $this->extlinks = true;
- }
- else if (preg_match('/^data:.+/i', $match[2])) { // RFC2397
- $value .= ' url('.htmlspecialchars($match[2], ENT_QUOTES).')';
- }
- }
- else { //whitelist ?
- $value .= ' ' . $match[0];
-
- // #1488535: Fix size units, so width:800 would be changed to width:800px
- if (preg_match('/(left|right|top|bottom|width|height)/i', $cssid) && preg_match('/^[0-9]+$/', $match[0])) {
- $value .= 'px';
- }
- }
-
- $str = substr($str, strlen($match[0]));
- }
-
- if (isset($value[0])) {
- $s .= ($s?' ':'') . $cssid . ':' . $value . ';';
- }
- }
- }
- return $s;
- }
-
- /* Take a node and return allowed attributes and check values */
- private function wash_attribs($node)
- {
- $t = '';
- $washed;
-
- foreach ($node->attributes as $key => $plop) {
- $key = strtolower($key);
- $value = $node->getAttribute($key);
- if (isset($this->_html_attribs[$key]) ||
- ($key == 'href' && !preg_match('!^(javascript|vbscript|data:text)!i', $value)
- && preg_match('!^([a-z][a-z0-9.+-]+:|//|#).+!i', $value))
- ) {
- $t .= ' ' . $key . '="' . htmlspecialchars($value, ENT_QUOTES) . '"';
- }
- else if ($key == 'style' && ($style = $this->wash_style($value))) {
- $quot = strpos($style, '"') !== false ? "'" : '"';
- $t .= ' style=' . $quot . $style . $quot;
- }
- else if ($key == 'background' || ($key == 'src' && strtolower($node->tagName) == 'img')) { //check tagName anyway
- if (($src = $this->config['cid_map'][$value])
- || ($src = $this->config['cid_map'][$this->config['base_url'].$value])) {
- $t .= ' ' . $key . '="' . htmlspecialchars($src, ENT_QUOTES) . '"';
- }
- else if (preg_match('/^(http|https|ftp):.+/i', $value)) {
- if ($this->config['allow_remote'])
- $t .= ' ' . $key . '="' . htmlspecialchars($value, ENT_QUOTES) . '"';
- else {
- $this->extlinks = true;
- if ($this->config['blocked_src'])
- $t .= ' ' . $key . '="' . htmlspecialchars($this->config['blocked_src'], ENT_QUOTES) . '"';
- }
- }
- else if (preg_match('/^data:.+/i', $value)) { // RFC2397
- $t .= ' ' . $key . '="' . htmlspecialchars($value, ENT_QUOTES) . '"';
- }
- }
- else
- $washed .= ($washed?' ':'') . $key;
- }
- return $t . ($washed && $this->config['show_washed']?' x-washed="'.$washed.'"':'');
- }
-
- /* The main loop that recurse on a node tree.
- * It output only allowed tags with allowed attributes
- * and allowed inline styles */
- private function dumpHtml($node)
- {
- if(!$node->hasChildNodes())
- return '';
-
- $node = $node->firstChild;
- $dump = '';
-
- do {
- switch($node->nodeType) {
- case XML_ELEMENT_NODE: //Check element
- $tagName = strtolower($node->tagName);
- if ($callback = $this->handlers[$tagName]) {
- $dump .= call_user_func($callback, $tagName, $this->wash_attribs($node), $this->dumpHtml($node), $this);
- }
- else if (isset($this->_html_elements[$tagName])) {
- $content = $this->dumpHtml($node);
- $dump .= '<' . $tagName . $this->wash_attribs($node) .
- ($content != '' || isset($this->_block_elements[$tagName]) ? ">$content</$tagName>" : ' />');
- }
- else if (isset($this->_ignore_elements[$tagName])) {
- $dump .= '<!-- ' . htmlspecialchars($tagName, ENT_QUOTES) . ' not allowed -->';
- }
- else {
- $dump .= '<!-- ' . htmlspecialchars($tagName, ENT_QUOTES) . ' ignored -->';
- $dump .= $this->dumpHtml($node); // ignore tags not its content
- }
- break;
- case XML_CDATA_SECTION_NODE:
- $dump .= $node->nodeValue;
- break;
- case XML_TEXT_NODE:
- $dump .= htmlspecialchars($node->nodeValue);
- break;
- case XML_HTML_DOCUMENT_NODE:
- $dump .= $this->dumpHtml($node);
- break;
- case XML_DOCUMENT_TYPE_NODE:
- break;
- default:
- $dump . '<!-- node type ' . $node->nodeType . ' -->';
- }
- } while($node = $node->nextSibling);
-
- return $dump;
- }
-
- /* Main function, give it untrusted HTML, tell it if you allow loading
- * remote images and give it a map to convert "cid:" urls. */
- public function wash($html)
- {
- // Charset seems to be ignored (probably if defined in the HTML document)
- $node = new DOMDocument('1.0', $this->config['charset']);
- $this->extlinks = false;
-
- // Find base URL for images
- if (preg_match('/<base\s+href=[\'"]*([^\'"]+)/is', $html, $matches))
- $this->config['base_url'] = $matches[1];
- else
- $this->config['base_url'] = '';
-
- // Remove invalid HTML comments (#1487759)
- // Don't remove valid conditional comments
- $html = preg_replace('/<!--[^->[\n]*>/', '', $html);
-
- @$node->loadHTML($html);
- return $this->dumpHtml($node);
- }
-
- /**
- * Getter for config parameters
- */
- public function get_config($prop)
- {
- return $this->config[$prop];
- }
-
-}
generated by cgit v1.2.3 (git 2.39.1) at 2024-11-01 08:15:21 +0000