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main.inc
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<?php
/*
+-----------------------------------------------------------------------+
| program/include/main.inc |
| |
| This file is part of the Roundcube Webmail client |
| Copyright (C) 2005-2011, The Roundcube Dev Team |
| Licensed under the GNU GPL |
| |
| PURPOSE: |
| Provide basic functions for the webmail package |
| |
+-----------------------------------------------------------------------+
| Author: Thomas Bruederli <roundcube@gmail.com> |
+-----------------------------------------------------------------------+
$Id$
*/
/**
* Roundcube Webmail common functions
*
* @package Core
* @author Thomas Bruederli <roundcube@gmail.com>
*/
require_once 'utf7.inc';
require_once INSTALL_PATH . 'program/include/rcube_shared.inc';
// define constannts for input reading
define('RCUBE_INPUT_GET', 0x0101);
define('RCUBE_INPUT_POST', 0x0102);
define('RCUBE_INPUT_GPC', 0x0103);
/**
* Return correct name for a specific database table
*
* @param string Table name
* @return string Translated table name
*/
function get_table_name($table)
{
global $CONFIG;
// return table name if configured
$config_key = 'db_table_'.$table;
if (strlen($CONFIG[$config_key]))
return $CONFIG[$config_key];
return $table;
}
/**
* Return correct name for a specific database sequence
* (used for Postgres only)
*
* @param string Secuence name
* @return string Translated sequence name
*/
function get_sequence_name($sequence)
{
// return sequence name if configured
$config_key = 'db_sequence_'.$sequence;
$opt = rcmail::get_instance()->config->get($config_key);
if (!empty($opt))
return $opt;
return $sequence;
}
/**
* Get localized text in the desired language
* It's a global wrapper for rcmail::gettext()
*
* @param mixed Named parameters array or label name
* @param string Domain to search in (e.g. plugin name)
* @return string Localized text
* @see rcmail::gettext()
*/
function rcube_label($p, $domain=null)
{
return rcmail::get_instance()->gettext($p, $domain);
}
/**
* Global wrapper of rcmail::text_exists()
* to check whether a text label is defined
*
* @see rcmail::text_exists()
*/
function rcube_label_exists($name, $domain=null)
{
return rcmail::get_instance()->text_exists($name, $domain);
}
/**
* Overwrite action variable
*
* @param string New action value
*/
function rcmail_overwrite_action($action)
{
$app = rcmail::get_instance();
$app->action = $action;
$app->output->set_env('action', $action);
}
/**
* Compose an URL for a specific action
*
* @param string Request action
* @param array More URL parameters
* @param string Request task (omit if the same)
* @return The application URL
*/
function rcmail_url($action, $p=array(), $task=null)
{
$app = rcmail::get_instance();
return $app->url((array)$p + array('_action' => $action, 'task' => $task));
}
/**
* Garbage collector function for temp files.
* Remove temp files older than two days
*/
function rcmail_temp_gc()
{
$rcmail = rcmail::get_instance();
$tmp = unslashify($rcmail->config->get('temp_dir'));
$expire = mktime() - 172800; // expire in 48 hours
if ($dir = opendir($tmp)) {
while (($fname = readdir($dir)) !== false) {
if ($fname{0} == '.')
continue;
if (filemtime($tmp.'/'.$fname) < $expire)
@unlink($tmp.'/'.$fname);
}
closedir($dir);
}
}
/**
* Garbage collector for cache entries.
* Remove all expired message cache records
* @return void
*/
function rcmail_cache_gc()
{
$rcmail = rcmail::get_instance();
$db = $rcmail->get_dbh();
// get target timestamp
$ts = get_offset_time($rcmail->config->get('message_cache_lifetime', '30d'), -1);
$db->query("DELETE FROM ".get_table_name('messages')."
WHERE created < " . $db->fromunixtime($ts));
$db->query("DELETE FROM ".get_table_name('cache')."
WHERE created < " . $db->fromunixtime($ts));
}
/**
* Catch an error and throw an exception.
*
* @param int Level of the error
* @param string Error message
*/
function rcube_error_handler($errno, $errstr)
{
throw new ErrorException($errstr, 0, $errno);
}
/**
* Convert a string from one charset to another.
* Uses mbstring and iconv functions if possible
*
* @param string Input string
* @param string Suspected charset of the input string
* @param string Target charset to convert to; defaults to RCMAIL_CHARSET
* @return string Converted string
*/
function rcube_charset_convert($str, $from, $to=NULL)
{
static $iconv_options = null;
static $mbstring_loaded = null;
static $mbstring_list = null;
static $conv = null;
$error = false;
$to = empty($to) ? strtoupper(RCMAIL_CHARSET) : rcube_parse_charset($to);
$from = rcube_parse_charset($from);
if ($from == $to || empty($str) || empty($from))
return $str;
// convert charset using iconv module
if (function_exists('iconv') && $from != 'UTF7-IMAP' && $to != 'UTF7-IMAP') {
if ($iconv_options === null) {
// ignore characters not available in output charset
$iconv_options = '//IGNORE';
if (iconv('', $iconv_options, '') === false) {
// iconv implementation does not support options
$iconv_options = '';
}
}
// throw an exception if iconv reports an illegal character in input
// it means that input string has been truncated
set_error_handler('rcube_error_handler', E_NOTICE);
try {
$_iconv = iconv($from, $to . $iconv_options, $str);
} catch (ErrorException $e) {
$_iconv = false;
}
restore_error_handler();
if ($_iconv !== false) {
return $_iconv;
}
}
if ($mbstring_loaded === null)
$mbstring_loaded = extension_loaded('mbstring');
// convert charset using mbstring module
if ($mbstring_loaded) {
$aliases['WINDOWS-1257'] = 'ISO-8859-13';
if ($mbstring_list === null) {
$mbstring_list = mb_list_encodings();
$mbstring_list = array_map('strtoupper', $mbstring_list);
}
$mb_from = $aliases[$from] ? $aliases[$from] : $from;
$mb_to = $aliases[$to] ? $aliases[$to] : $to;
// return if encoding found, string matches encoding and convert succeeded
if (in_array($mb_from, $mbstring_list) && in_array($mb_to, $mbstring_list)) {
if (mb_check_encoding($str, $mb_from) && ($out = mb_convert_encoding($str, $mb_to, $mb_from)))
return $out;
}
}
// convert charset using bundled classes/functions
if ($to == 'UTF-8') {
if ($from == 'UTF7-IMAP') {
if ($_str = utf7_to_utf8($str))
return $_str;
}
else if ($from == 'UTF-7') {
if ($_str = rcube_utf7_to_utf8($str))
return $_str;
}
else if (($from == 'ISO-8859-1') && function_exists('utf8_encode')) {
return utf8_encode($str);
}
else if (class_exists('utf8')) {
if (!$conv)
$conv = new utf8($from);
else
$conv->loadCharset($from);
if($_str = $conv->strToUtf8($str))
return $_str;
}
$error = true;
}
// encode string for output
if ($from == 'UTF-8') {
// @TODO: we need a function for UTF-7 (RFC2152) conversion
if ($to == 'UTF7-IMAP' || $to == 'UTF-7') {
if ($_str = utf8_to_utf7($str))
return $_str;
}
else if ($to == 'ISO-8859-1' && function_exists('utf8_decode')) {
return utf8_decode($str);
}
else if (class_exists('utf8')) {
if (!$conv)
$conv = new utf8($to);
else
$conv->loadCharset($from);
if ($_str = $conv->strToUtf8($str))
return $_str;
}
$error = true;
}
// return UTF-8 or original string
return $str;
}
/**
* Parse and validate charset name string (see #1485758).
* Sometimes charset string is malformed, there are also charset aliases
* but we need strict names for charset conversion (specially utf8 class)
*
* @param string Input charset name
* @return string The validated charset name
*/
function rcube_parse_charset($input)
{
static $charsets = array();
$charset = strtoupper($input);
if (isset($charsets[$input]))
return $charsets[$input];
$charset = preg_replace(array(
'/^[^0-9A-Z]+/', // e.g. _ISO-8859-JP$SIO
'/\$.*$/', // e.g. _ISO-8859-JP$SIO
'/UNICODE-1-1-*/', // RFC1641/1642
'/^X-/', // X- prefix (e.g. X-ROMAN8 => ROMAN8)
), '', $charset);
if ($charset == 'BINARY')
return $charsets[$input] = null;
# Aliases: some of them from HTML5 spec.
$aliases = array(
'USASCII' => 'WINDOWS-1252',
'ANSIX31101983' => 'WINDOWS-1252',
'ANSIX341968' => 'WINDOWS-1252',
'UNKNOWN8BIT' => 'ISO-8859-15',
'UNKNOWN' => 'ISO-8859-15',
'USERDEFINED' => 'ISO-8859-15',
'KSC56011987' => 'EUC-KR',
'GB2312' => 'GBK',
'GB231280' => 'GBK',
'UNICODE' => 'UTF-8',
'UTF7IMAP' => 'UTF7-IMAP',
'TIS620' => 'WINDOWS-874',
'ISO88599' => 'WINDOWS-1254',
'ISO885911' => 'WINDOWS-874',
'MACROMAN' => 'MACINTOSH',
'77' => 'MAC',
'128' => 'SHIFT-JIS',
'129' => 'CP949',
'130' => 'CP1361',
'134' => 'GBK',
'136' => 'BIG5',
'161' => 'WINDOWS-1253',
'162' => 'WINDOWS-1254',
'163' => 'WINDOWS-1258',
'177' => 'WINDOWS-1255',
'178' => 'WINDOWS-1256',
'186' => 'WINDOWS-1257',
'204' => 'WINDOWS-1251',
'222' => 'WINDOWS-874',
'238' => 'WINDOWS-1250',
'MS950' => 'CP950',
'WINDOWS949' => 'UHC',
);
// allow A-Z and 0-9 only
$str = preg_replace('/[^A-Z0-9]/', '', $charset);
if (isset($aliases[$str]))
$result = $aliases[$str];
// UTF
else if (preg_match('/U[A-Z][A-Z](7|8|16|32)(BE|LE)*/', $str, $m))
$result = 'UTF-' . $m[1] . $m[2];
// ISO-8859
else if (preg_match('/ISO8859([0-9]{0,2})/', $str, $m)) {
$iso = 'ISO-8859-' . ($m[1] ? $m[1] : 1);
// some clients sends windows-1252 text as latin1,
// it is safe to use windows-1252 for all latin1
$result = $iso == 'ISO-8859-1' ? 'WINDOWS-1252' : $iso;
}
// handle broken charset names e.g. WINDOWS-1250HTTP-EQUIVCONTENT-TYPE
else if (preg_match('/(WIN|WINDOWS)([0-9]+)/', $str, $m)) {
$result = 'WINDOWS-' . $m[2];
}
// LATIN
else if (preg_match('/LATIN(.*)/', $str, $m)) {
$aliases = array('2' => 2, '3' => 3, '4' => 4, '5' => 9, '6' => 10,
'7' => 13, '8' => 14, '9' => 15, '10' => 16,
'ARABIC' => 6, 'CYRILLIC' => 5, 'GREEK' => 7, 'GREEK1' => 7, 'HEBREW' => 8);
// some clients sends windows-1252 text as latin1,
// it is safe to use windows-1252 for all latin1
if ($m[1] == 1) {
$result = 'WINDOWS-1252';
}
// if iconv is not supported we need ISO labels, it's also safe for iconv
else if (!empty($aliases[$m[1]])) {
$result = 'ISO-8859-'.$aliases[$m[1]];
}
// iconv requires convertion of e.g. LATIN-1 to LATIN1
else {
$result = $str;
}
}
else {
$result = $charset;
}
$charsets[$input] = $result;
return $result;
}
/**
* Converts string from standard UTF-7 (RFC 2152) to UTF-8.
*
* @param string Input string
* @return string The converted string
*/
function rcube_utf7_to_utf8($str)
{
$Index_64 = array(
0,0,0,0, 0,0,0,0, 0,0,0,0, 0,0,0,0,
0,0,0,0, 0,0,0,0, 0,0,0,0, 0,0,0,0,
0,0,0,0, 0,0,0,0, 0,0,0,1, 0,0,0,0,
1,1,1,1, 1,1,1,1, 1,1,0,0, 0,0,0,0,
0,1,1,1, 1,1,1,1, 1,1,1,1, 1,1,1,1,
1,1,1,1, 1,1,1,1, 1,1,1,0, 0,0,0,0,
0,1,1,1, 1,1,1,1, 1,1,1,1, 1,1,1,1,
1,1,1,1, 1,1,1,1, 1,1,1,0, 0,0,0,0,
);
$u7len = strlen($str);
$str = strval($str);
$res = '';
for ($i=0; $u7len > 0; $i++, $u7len--)
{
$u7 = $str[$i];
if ($u7 == '+')
{
$i++;
$u7len--;
$ch = '';
for (; $u7len > 0; $i++, $u7len--)
{
$u7 = $str[$i];
if (!$Index_64[ord($u7)])
break;
$ch .= $u7;
}
if ($ch == '') {
if ($u7 == '-')
$res .= '+';
continue;
}
$res .= rcube_utf16_to_utf8(base64_decode($ch));
}
else
{
$res .= $u7;
}
}
return $res;
}
/**
* Converts string from UTF-16 to UTF-8 (helper for utf-7 to utf-8 conversion)
*
* @param string Input string
* @return string The converted string
*/
function rcube_utf16_to_utf8($str)
{
$len = strlen($str);
$dec = '';
for ($i = 0; $i < $len; $i += 2) {
$c = ord($str[$i]) << 8 | ord($str[$i + 1]);
if ($c >= 0x0001 && $c <= 0x007F) {
$dec .= chr($c);
} else if ($c > 0x07FF) {
$dec .= chr(0xE0 | (($c >> 12) & 0x0F));
$dec .= chr(0x80 | (($c >> 6) & 0x3F));
$dec .= chr(0x80 | (($c >> 0) & 0x3F));
} else {
$dec .= chr(0xC0 | (($c >> 6) & 0x1F));
$dec .= chr(0x80 | (($c >> 0) & 0x3F));
}
}
return $dec;
}
/**
* Replacing specials characters to a specific encoding type
*
* @param string Input string
* @param string Encoding type: text|html|xml|js|url
* @param string Replace mode for tags: show|replace|remove
* @param boolean Convert newlines
* @return string The quoted string
*/
function rep_specialchars_output($str, $enctype='', $mode='', $newlines=TRUE)
{
static $html_encode_arr = false;
static $js_rep_table = false;
static $xml_rep_table = false;
if (!$enctype)
$enctype = $OUTPUT->type;
// encode for HTML output
if ($enctype=='html')
{
if (!$html_encode_arr)
{
$html_encode_arr = get_html_translation_table(HTML_SPECIALCHARS);
unset($html_encode_arr['?']);
}
$ltpos = strpos($str, '<');
$encode_arr = $html_encode_arr;
// don't replace quotes and html tags
if (($mode=='show' || $mode=='') && $ltpos!==false && strpos($str, '>', $ltpos)!==false)
{
unset($encode_arr['"']);
unset($encode_arr['<']);
unset($encode_arr['>']);
unset($encode_arr['&']);
}
else if ($mode=='remove')
$str = strip_tags($str);
$out = strtr($str, $encode_arr);
// avoid douple quotation of &
$out = preg_replace('/&([A-Za-z]{2,6}|#[0-9]{2,4});/', '&\\1;', $out);
return $newlines ? nl2br($out) : $out;
}
// if the replace tables for XML and JS are not yet defined
if ($js_rep_table===false)
{
$js_rep_table = $xml_rep_table = array();
$xml_rep_table['&'] = '&';
for ($c=160; $c<256; $c++) // can be increased to support more charsets
$xml_rep_table[chr($c)] = "&#$c;";
$xml_rep_table['"'] = '"';
$js_rep_table['"'] = '\\"';
$js_rep_table["'"] = "\\'";
$js_rep_table["\\"] = "\\\\";
// Unicode line and paragraph separators (#1486310)
$js_rep_table[chr(hexdec(E2)).chr(hexdec(80)).chr(hexdec(A8))] = '
';
$js_rep_table[chr(hexdec(E2)).chr(hexdec(80)).chr(hexdec(A9))] = '
';
}
// encode for javascript use
if ($enctype=='js')
return preg_replace(array("/\r?\n/", "/\r/", '/<\\//'), array('\n', '\n', '<\\/'), strtr($str, $js_rep_table));
// encode for plaintext
if ($enctype=='text')
return str_replace("\r\n", "\n", $mode=='remove' ? strip_tags($str) : $str);
if ($enctype=='url')
return rawurlencode($str);
// encode for XML
if ($enctype=='xml')
return strtr($str, $xml_rep_table);
// no encoding given -> return original string
return $str;
}
/**
* Quote a given string.
* Shortcut function for rep_specialchars_output
*
* @return string HTML-quoted string
* @see rep_specialchars_output()
*/
function Q($str, $mode='strict', $newlines=TRUE)
{
return rep_specialchars_output($str, 'html', $mode, $newlines);
}
/**
* Quote a given string for javascript output.
* Shortcut function for rep_specialchars_output
*
* @return string JS-quoted string
* @see rep_specialchars_output()
*/
function JQ($str)
{
return rep_specialchars_output($str, 'js');
}
/**
* Read input value and convert it for internal use
* Performs stripslashes() and charset conversion if necessary
*
* @param string Field name to read
* @param int Source to get value from (GPC)
* @param boolean Allow HTML tags in field value
* @param string Charset to convert into
* @return string Field value or NULL if not available
*/
function get_input_value($fname, $source, $allow_html=FALSE, $charset=NULL)
{
$value = NULL;
if ($source==RCUBE_INPUT_GET && isset($_GET[$fname]))
$value = $_GET[$fname];
else if ($source==RCUBE_INPUT_POST && isset($_POST[$fname]))
$value = $_POST[$fname];
else if ($source==RCUBE_INPUT_GPC)
{
if (isset($_POST[$fname]))
$value = $_POST[$fname];
else if (isset($_GET[$fname]))
$value = $_GET[$fname];
else if (isset($_COOKIE[$fname]))
$value = $_COOKIE[$fname];
}
return parse_input_value($value, $allow_html, $charset);
}
/**
* Parse/validate input value. See get_input_value()
* Performs stripslashes() and charset conversion if necessary
*
* @param string Input value
* @param boolean Allow HTML tags in field value
* @param string Charset to convert into
* @return string Parsed value
*/
function parse_input_value($value, $allow_html=FALSE, $charset=NULL)
{
global $OUTPUT;
if (empty($value))
return $value;
if (is_array($value)) {
foreach ($value as $idx => $val)
$value[$idx] = parse_input_value($val, $allow_html, $charset);
return $value;
}
// strip single quotes if magic_quotes_sybase is enabled
if (ini_get('magic_quotes_sybase'))
$value = str_replace("''", "'", $value);
// strip slashes if magic_quotes enabled
else if (get_magic_quotes_gpc() || get_magic_quotes_runtime())
$value = stripslashes($value);
// remove HTML tags if not allowed
if (!$allow_html)
$value = strip_tags($value);
// convert to internal charset
if (is_object($OUTPUT) && $charset)
return rcube_charset_convert($value, $OUTPUT->get_charset(), $charset);
else
return $value;
}
/**
* Convert array of request parameters (prefixed with _)
* to a regular array with non-prefixed keys.
*
* @param int Source to get value from (GPC)
* @return array Hash array with all request parameters
*/
function request2param($mode = RCUBE_INPUT_GPC)
{
$out = array();
$src = $mode == RCUBE_INPUT_GET ? $_GET : ($mode == RCUBE_INPUT_POST ? $_POST : $_REQUEST);
foreach ($src as $key => $value) {
$fname = $key[0] == '_' ? substr($key, 1) : $key;
$out[$fname] = get_input_value($key, $mode);
}
return $out;
}
/**
* Remove all non-ascii and non-word chars
* except ., -, _
*/
function asciiwords($str, $css_id = false, $replace_with = '')
{
$allowed = 'a-z0-9\_\-' . (!$css_id ? '\.' : '');
return preg_replace("/[^$allowed]/i", $replace_with, $str);
}
/**
* Convert the given string into a valid HTML identifier
* Same functionality as done in app.js with this.identifier_expr
*
*/
function html_identifier($str)
{
return asciiwords($str, true, '_');
}
/**
* Remove single and double quotes from given string
*
* @param string Input value
* @return string Dequoted string
*/
function strip_quotes($str)
{
return str_replace(array("'", '"'), '', $str);
}
/**
* Remove new lines characters from given string
*
* @param string Input value
* @return string Stripped string
*/
function strip_newlines($str)
{
return preg_replace('/[\r\n]/', '', $str);
}
/**
* Create a HTML table based on the given data
*
* @param array Named table attributes
* @param mixed Table row data. Either a two-dimensional array or a valid SQL result set
* @param array List of cols to show
* @param string Name of the identifier col
* @return string HTML table code
*/
function rcube_table_output($attrib, $table_data, $a_show_cols, $id_col)
{
global $RCMAIL;
$table = new html_table(/*array('cols' => count($a_show_cols))*/);
// add table header
if (!$attrib['noheader'])
foreach ($a_show_cols as $col)
$table->add_header($col, Q(rcube_label($col)));
$c = 0;
if (!is_array($table_data))
{
$db = $RCMAIL->get_dbh();
while ($table_data && ($sql_arr = $db->fetch_assoc($table_data)))
{
$zebra_class = $c % 2 ? 'even' : 'odd';
$table->add_row(array('id' => 'rcmrow' . html_identifier($sql_arr[$id_col]), 'class' => $zebra_class));
// format each col
foreach ($a_show_cols as $col)
$table->add($col, Q($sql_arr[$col]));
$c++;
}
}
else
{
foreach ($table_data as $row_data)
{
$zebra_class = $c % 2 ? 'even' : 'odd';
if (!empty($row_data['class']))
$zebra_class .= ' '.$row_data['class'];
$table->add_row(array('id' => 'rcmrow' . html_identifier($row_data[$id_col]), 'class' => $zebra_class));
// format each col
foreach ($a_show_cols as $col)
$table->add($col, Q(is_array($row_data[$col]) ? $row_data[$col][0] : $row_data[$col]));
$c++;
}
}
return $table->show($attrib);
}
/**
* Create an edit field for inclusion on a form
*
* @param string col field name
* @param string value field value
* @param array attrib HTML element attributes for field
* @param string type HTML element type (default 'text')
* @return string HTML field definition
*/
function rcmail_get_edit_field($col, $value, $attrib, $type='text')
{
static $colcounts = array();
$fname = '_'.$col;
$attrib['name'] = $fname . ($attrib['array'] ? '[]' : '');
$attrib['class'] = trim($attrib['class'] . ' ff_' . $col);
if ($type == 'checkbox') {
$attrib['value'] = '1';
$input = new html_checkbox($attrib);
}
else if ($type == 'textarea') {
$attrib['cols'] = $attrib['size'];
$input = new html_textarea($attrib);
}
else if ($type == 'select') {
$input = new html_select($attrib);
$input->add('---', '');
$input->add(array_values($attrib['options']), array_keys($attrib['options']));
}
else {
if ($attrib['type'] != 'text' && $attrib['type'] != 'hidden')
$attrib['type'] = 'text';
$input = new html_inputfield($attrib);
}
// use value from post
if (isset($_POST[$fname])) {
$postvalue = get_input_value($fname, RCUBE_INPUT_POST, true);
$value = $attrib['array'] ? $postvalue[intval($colcounts[$col]++)] : $postvalue;
}
$out = $input->show($value);
return $out;
}
/**
* Replace all css definitions with #container [def]
* and remove css-inlined scripting
*
* @param string CSS source code
* @param string Container ID to use as prefix
* @return string Modified CSS source
*/
function rcmail_mod_css_styles($source, $container_id)
{
$last_pos = 0;
$replacements = new rcube_string_replacer;
// ignore the whole block if evil styles are detected
$stripped = preg_replace('/[^a-z\(:;]/', '', rcmail_xss_entity_decode($source));
if (preg_match('/expression|behavior|url\(|import[^a]/', $stripped))
return '/* evil! */';
// remove css comments (sometimes used for some ugly hacks)
$source = preg_replace('!/\*(.+)\*/!Ums', '', $source);
// cut out all contents between { and }
while (($pos = strpos($source, '{', $last_pos)) && ($pos2 = strpos($source, '}', $pos)))
{
$key = $replacements->add(substr($source, $pos+1, $pos2-($pos+1)));
$source = substr($source, 0, $pos+1) . $replacements->get_replacement($key) . substr($source, $pos2, strlen($source)-$pos2);
$last_pos = $pos+2;
}
// remove html comments and add #container to each tag selector.
// also replace body definition because we also stripped off the <body> tag
$styles = preg_replace(
array(
'/(^\s*<!--)|(-->\s*$)/',
'/(^\s*|,\s*|\}\s*)([a-z0-9\._#\*][a-z0-9\.\-_]*)/im',
'/'.preg_quote($container_id, '/').'\s+body/i',
),
array(
'',
"\\1#$container_id \\2",
$container_id,
),
$source);
// put block contents back in
$styles = $replacements->resolve($styles);
return $styles;
}
/**
* Decode escaped entities used by known XSS exploits.
* See http://downloads.securityfocus.com/vulnerabilities/exploits/26800.eml for examples
*
* @param string CSS content to decode
* @return string Decoded string
*/
function rcmail_xss_entity_decode($content)
{
$out = html_entity_decode(html_entity_decode($content));
$out = preg_replace_callback('/\\\([0-9a-f]{4})/i', 'rcmail_xss_entity_decode_callback', $out);
$out = preg_replace('#/\*.*\*/#Um', '', $out);
return $out;
}
/**
* preg_replace_callback callback for rcmail_xss_entity_decode_callback
*
* @param array matches result from preg_replace_callback
* @return string decoded entity
*/
function rcmail_xss_entity_decode_callback($matches)
{
return chr(hexdec($matches[1]));
}
/**
* Compose a valid attribute string for HTML tags
*
* @param array Named tag attributes
* @param array List of allowed attributes
* @return string HTML formatted attribute string
*/
function create_attrib_string($attrib, $allowed_attribs=array('id', 'class', 'style'))
{
// allow the following attributes to be added to the <iframe> tag
$attrib_str = '';
foreach ($allowed_attribs as $a)
if (isset($attrib[$a]))
$attrib_str .= sprintf(' %s="%s"', $a, str_replace('"', '"', $attrib[$a]));
return $attrib_str;
}
/**
* Convert a HTML attribute string attributes to an associative array (name => value)
*
* @param string Input string
* @return array Key-value pairs of parsed attributes
*/
function parse_attrib_string($str)
{
$attrib = array();
preg_match_all('/\s*([-_a-z]+)=(["\'])??(?(2)([^\2]*)\2|(\S+?))/Ui', stripslashes($str), $regs, PREG_SET_ORDER);
// convert attributes to an associative array (name => value)
if ($regs) {
foreach ($regs as $attr) {
$attrib[strtolower($attr[1])] = html_entity_decode($attr[3] . $attr[4]);
}
}
return $attrib;
}
/**
* Improved equivalent to strtotime()
*
* @param string Date string
* @return int
*/
function rcube_strtotime($date)
{
// check for MS Outlook vCard date format YYYYMMDD
if (preg_match('/^([12][90]\d\d)([01]\d)(\d\d)$/', trim($date), $matches)) {
return mktime(0,0,0, intval($matches[2]), intval($matches[3]), intval($matches[1]));
}
else if (is_numeric($date))
return $date;
// support non-standard "GMTXXXX" literal
$date = preg_replace('/GMT\s*([+-][0-9]+)/', '\\1', $date);