mirror of
https://github.com/EGroupware/egroupware.git
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512 lines
19 KiB
PHP
512 lines
19 KiB
PHP
<?php
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/**
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* EGroupware API - Html mail handling
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*
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* @link http://www.egroupware.org
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* @author Klaus Leithoff <kl@stylite.de>
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* @license http://opensource.org/licenses/lgpl-license.php LGPL - GNU Lesser General Public License
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* @package api
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* @version $Id$
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*/
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namespace EGroupware\Api\Mail;
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use EGroupware\Api;
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/**
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* Html mail handling
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*
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* @todo clean up IDE warnings, mostly multiple assigments
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*/
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class Html
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{
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/**
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* Return the decoded string meeting some additional requirements for mailheaders
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*
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* @param string $_string -> part of an mailheader
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* @param string $displayCharset the charset parameter specifies the character set to represent the result by (if iconv_mime_decode is to be used)
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* @param integer $reclevel param to control recursive calls (to prevent endless recursion)
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* @return string
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*/
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static function decodeMailHeader($_string, $displayCharset='utf-8', $reclevel=0)
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{
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$maxreclevel=25;
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if ($reclevel > $maxreclevel) {
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error_log( __METHOD__.__LINE__." Recursion Level Exeeded ($reclevel) while decoding $_string ");
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return $_string;
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}
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$reclevel++;
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//error_log(__FILE__.','.__METHOD__.':'."called with $_string and CHARSET $displayCharset");
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if(function_exists('imap_mime_header_decode'))
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{
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// some characterreplacements, as they fail to translate
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$sar = array(
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'@(\x84|\x93|\x94)@',
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'@(\x96|\x97|\x1a)@',
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'@(\x91|\x92)@',
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'@(\x85)@',
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'@(\x86)@',
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);
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$rar = array(
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'"',
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'-',
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'\'',
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'...',
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'+',
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);
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$newString = '';
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$string = preg_replace('/\?=\s+=\?/', '?= =?', $_string);
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$elements=imap_mime_header_decode($string);
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$convertAtEnd = false;
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foreach((array)$elements as $element)
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{
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if ($element->charset == 'default') $element->charset = Api\Translation::detect_encoding($element->text);
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if ($element->charset != 'x-unknown')
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{
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if( strtoupper($element->charset) != 'UTF-8') $element->text = preg_replace($sar,$rar,$element->text);
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// check if there is a possible nested encoding; make sure that the inputstring and the decoded result are different to avoid loops
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$openTags = substr_count($element->text,'?=');
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if(preg_match('/\?=.+=\?/', $element->text) && $openTags>0 && $openTags==substr_count($element->text,'=?') && $element->text != $_string)
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{
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$element->text = self::decodeMailHeader($element->text, $element->charset, $reclevel);
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$element->charset = $displayCharset;
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}
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$newString .= Api\Translation::convert($element->text,$element->charset);
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}
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else
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{
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$newString .= $element->text;
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$convertAtEnd = true;
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}
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}
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if ($convertAtEnd) $newString = self::decodeMailHeader($newString,$displayCharset,$reclevel);
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return preg_replace('/([\000-\012\015\016\020-\037\075])/','',$newString);
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}
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elseif(function_exists(mb_decode_mimeheader))
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{
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$matches = null;
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if(preg_match_all('/=\?.*\?Q\?.*\?=/iU', $string=$_string, $matches))
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{
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foreach($matches[0] as $match)
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{
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$fixedMatch = str_replace('_', ' ', $match);
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$string = str_replace($match, $fixedMatch, $string);
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}
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$string = str_replace('=?ISO8859-','=?ISO-8859-',
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str_replace('=?windows-1258','=?ISO-8859-1',$string));
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}
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$string = mb_decode_mimeheader($string);
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return preg_replace('/([\000-\012\015\016\020-\037\075])/','',$string);
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}
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elseif(function_exists(iconv_mime_decode))
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{
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// continue decoding also if an error occurs
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$string = @iconv_mime_decode($_string, 2, $displayCharset);
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return preg_replace('/([\000-\012\015\016\020-\037\075])/','',$string);
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}
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// no decoding function available
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return preg_replace('/([\000-\012\015\016\020-\037\075])/','',$_string);
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}
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/**
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* replace emailaddresses enclosed in <> (eg.: <me@you.de>) with the emailaddress only (e.g: me@you.de)
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* as well as those emailadresses in links, and within broken links
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* @param string the text to process
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* @return 1
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*/
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static function replaceEmailAdresses(&$text)
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{
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//error_log($text);
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//replace CRLF with something other to be preserved via preg_replace as CRLF seems to vanish
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$text2 = str_replace("\r\n",'<#cr-lf#>',$text);
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// replace emailaddresses eclosed in <> (eg.: <me@you.de>) with the emailaddress only (e.g: me@you.de)
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$text3 = preg_replace("/(<|<a href=\")*(mailto:([\w\.,-.,_.,0-9.]+)(@)([\w\.,-.,_.,0-9.]+))(>|>)*/i","$2 ", $text2);
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//$text = preg_replace_callback("/(<|<a href=\")*(mailto:([\w\.,-.,_.,0-9.]+)(@)([\w\.,-.,_.,0-9.]+))(>|>)*/i",'self::transform_mailto2text',$text);
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//$text = preg_replace('~<a[^>]+href=\"(mailto:)+([^"]+)\"[^>]*>~si','$2 ',$text);
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$text4 = preg_replace_callback('~<a[^>]+href=\"(mailto:)+([^"]+)\"[^>]*>([ @\w\.,-.,_.,0-9.]+)<\/a>~si','self::transform_mailto2text',$text3);
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$text5 = preg_replace("/(([\w\.,-.,_.,0-9.]+)(@)([\w\.,-.,_.,0-9.]+))( |\s)*(<\/a>)*( |\s)*(>|>)*/i","$1 ", $text4);
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$text6 = preg_replace("/(<|<)*(([\w\.,-.,_.,0-9.]+)@([\w\.,-.,_.,0-9.]+))(>|>)*/i","$2 ", $text5);
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$text = str_replace('<#cr-lf#>',"\r\n",$text6);
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return 1;
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}
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/**
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* strip tags out of the message completely with their content
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* @param string $_body is the text to be processed
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* @param string $tag is the tagname which is to be removed. Note, that only the name of the tag is to be passed to the function
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* without the enclosing brackets
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* @param string $endtag can be different from tag but should be used only, if begin and endtag are known to be different e.g.: <!-- -->
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* @param bool $addbracesforendtag if endtag is given, you may decide if the </ and > braces are to be added,
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* or if you want the string to be matched as is
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* @return void the modified text is passed via reference
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*/
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static function replaceTagsCompletley(&$_body,$tag,$endtag='',$addbracesforendtag=true)
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{
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if ($tag) $tag = strtolower($tag);
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$singleton = false;
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if ($endtag=='/>') $singleton =true;
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if ($endtag == '' || empty($endtag) || !isset($endtag))
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{
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$endtag = $tag;
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} else {
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$endtag = strtolower($endtag);
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//error_log(__METHOD__.' Using EndTag:'.$endtag);
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}
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// strip tags out of the message completely with their content
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if ($_body) {
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if ($singleton)
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{
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//$_body = preg_replace('~<'.$tag.'[^>].*? '.$endtag.'~simU','',$_body);
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$_body = preg_replace('~<?'.$tag.'[^>].* '.$endtag.'~simU','',$_body); // we are in Ungreedy mode, so we expect * to be ungreedy without specifying ?
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}
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else
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{
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$found=null;
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if ($addbracesforendtag === true )
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{
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if (stripos($_body,'<'.$tag)!==false) $ct = preg_match_all('#<'.$tag.'(?:\s.*)?>(.+)</'.$endtag.'>#isU', $_body, $found);
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if ($ct>0)
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{
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//error_log(__METHOD__.__LINE__.array2string($found[0]));
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// only replace what we have found
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$_body = str_ireplace($found[0],'',$_body);
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}
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// remove left over tags, unfinished ones, and so on
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$_body = preg_replace('~<'.$tag.'[^>]*?>~si','',$_body);
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}
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if ($addbracesforendtag === false )
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{
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if (stripos($_body,'<'.$tag)!==false) $ct = preg_match_all('#<'.$tag.'(?:\s.*)?>(.+)'.$endtag.'#isU', $_body, $found);
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if ($ct>0)
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{
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//error_log(__METHOD__.__LINE__.array2string($found[0]));
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// only replace what we have found
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$_body = str_ireplace($found[0],'',$_body);
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}
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/*
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$_body = preg_replace('~<'.$tag.'[^>]*?>(.*?)'.$endtag.'~simU','',$_body);
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*/
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// remove left over tags, unfinished ones, and so on
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$_body = preg_replace(array('~<'.$tag.'[^>]*?>~si', '~'.$endtag.'~'), '', $_body);
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}
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}
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}
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}
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static function transform_mailto2text($matches)
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{
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//error_log(__METHOD__.__LINE__.array2string($matches));
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// this is the actual url
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$matches[2] = trim(strip_tags($matches[2]));
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$matches[3] = trim(strip_tags($matches[3]));
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$matches[2] = str_replace(array('%40','%20'),array('@',' '),$matches[2]);
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$matches[3] = str_replace(array('%40','%20'),array('@',' '),$matches[3]);
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return $matches[1].$matches[2].($matches[2]==$matches[3]?' ':' -> '.$matches[3].' ');
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}
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static function transform_url2text($matches)
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{
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//error_log(__METHOD__.__LINE__.array2string($matches));
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$linkTextislink = false;
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// this is the actual url
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$matches[2] = trim(strip_tags($matches[2]));
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if ($matches[2]==$matches[1]) $linkTextislink = true;
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$matches[1] = str_replace(' ','%20',$matches[1]);
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return ($linkTextislink?' ':'[ ').$matches[1].($linkTextislink?'':' -> '.$matches[2]).($linkTextislink?' ':' ]');
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}
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/**
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* convertHTMLToText
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* @param string $_html : Text to be stripped down
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* @param string $displayCharset : charset to use; should be a valid charset
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* @param bool $stripcrl : flag to indicate for the removal of all crlf \r\n
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* @param bool $stripalltags : flag to indicate wether or not to strip $_html from all remaining tags
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* @return text $_html : the modified text.
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*/
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static function convertHTMLToText($_html,$displayCharset=false,$stripcrl=false,$stripalltags=true)
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{
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// assume input isHTML, but test the input anyway, because,
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// if it is not, we may not want to strip whitespace
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$isHTML = true;
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if (strlen(strip_tags($_html)) == strlen($_html))
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{
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$isHTML = false;
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// return $_html; // maybe we should not proceed at all
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}
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if ($displayCharset === false) $displayCharset = Api\Translation::charset();
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//error_log(__METHOD__.$_html);
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#print '<hr>';
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#print "<pre>"; print htmlspecialchars($_html);
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#print "</pre>";
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#print "<hr>";
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if (stripos($_html,'style')!==false) self::replaceTagsCompletley($_html,'style'); // clean out empty or pagewide style definitions / left over tags
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if (stripos($_html,'head')!==false) self::replaceTagsCompletley($_html,'head'); // Strip out stuff in head
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if (stripos($_html,'![if')!==false && stripos($_html,'<![endif]>')!==false) self::replaceTagsCompletley($_html,'!\[if','<!\[endif\]>',false); // Strip out stuff in ifs
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if (stripos($_html,'!--[if')!==false && stripos($_html,'<![endif]-->')!==false) self::replaceTagsCompletley($_html,'!--\[if','<!\[endif\]-->',false); // Strip out stuff in ifs
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$Rules = array ('@<script[^>]*?>.*?</script>@siU', // Strip out javascript
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'@&(quot|#34);@i', // Replace HTML entities
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'@&(amp|#38);@i', // Ampersand &
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'@&(lt|#60);@i', // Less Than <
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'@&(gt|#62);@i', // Greater Than >
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'@&(nbsp|#160);@i', // Non Breaking Space
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'@&(iexcl|#161);@i', // Inverted Exclamation point
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'@&(cent|#162);@i', // Cent
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'@&(pound|#163);@i', // Pound
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'@&(copy|#169);@i', // Copyright
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'@&(reg|#174);@i', // Registered
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'@&(trade|#8482);@i', // trade
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'@'@i', // singleQuote
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'@(\xc2\xa0)@', // nbsp or tab (encoded windows-style)
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'@(\xe2\x80\x8b)@', // ZERO WIDTH SPACE
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);
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$Replace = array ('',
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'"',
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'#amper#sand#',
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'<',
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'>',
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' ',
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chr(161),
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chr(162),
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chr(163),
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'(C)',//chr(169),// copyrighgt
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'(R)',//chr(174),// registered
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'(TM)',// trade
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"'",
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' ',
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'',
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);
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$_html = preg_replace($Rules, $Replace, $_html);
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// removing carriage return linefeeds, preserve those enclosed in <pre> </pre> tags
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if ($stripcrl === true )
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{
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if (stripos($_html,'<pre ')!==false || stripos($_html,'<pre>')!==false)
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{
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$contentArr = self::splithtmlByPRE($_html);
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foreach ($contentArr as $k =>&$elem)
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{
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if (stripos($elem,'<pre ')===false && stripos($elem,'<pre>')===false)
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{
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//$elem = str_replace('@(\r\n)@i',' ',$elem);
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$elem = str_replace(array("\r\n","\n"),($isHTML?'':' '),$elem);
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}
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}
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$_html = implode('',$contentArr);
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}
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else
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{
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$_html = str_replace(array("\r\n","\n"),($isHTML?'':' '),$_html);
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}
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}
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$tags = array (
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0 => '~<h[123][^>]*>\r*\n*~si',
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1 => '~<h[456][^>]*>\r*\n*~si',
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2 => '~<table[^>]*>\r*\n*~si',
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3 => '~<tr[^>]*>\r*\n*~si',
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4 => '~<li[^>]*>\r*\n*~si',
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5 => '~<br[^>]*>\r*\n*~si',
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6 => '~<br[^>]*>~si',
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7 => '~<p[^>]*>\r*\n*~si',
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8 => '~<div[^>]*>\r*\n*~si',
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9 => '~<span[^>]*>\r*\n*~si',
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10 => '~<hr[^>]*>\r*\n*~si',
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11 => '/<blockquote type="cite">/',
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12 => '/<blockquote>/',
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13 => '~</blockquote>~si',
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14 => '~<blockquote[^>]*>~si',
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15 => '/<=\s*([1234567890])/',
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16 => '/>=\s*([1234567890])/',
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17 => '/<\s*([1234567890])/',
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18 => '/>\s*([1234567890])/',
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);
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$Replace = array (
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0 => "\r\n",
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1 => "\r\n",
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2 => "\r\n",
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3 => "\r\n",
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4 => "\r\n",
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5 => "\r\n",
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6 => "\r\n",
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7 => "\r\n",
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8 => "\r\n",
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9 => "",
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10 => "\r\n__________________________________________________\r\n",
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11 => '#blockquote#type#cite#',
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12 => '#blockquote#type#cite#',
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13 => '#blockquote#end#cite#',
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14 => '#blockquote#type#cite#',
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15 => '#lowerorequal#than#$1',
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16 => '#greaterorequal#than#$1',
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17 => '#lower#than#$1',
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18 => '#greater#than#$1',
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);
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$_html = preg_replace($tags,$Replace,$_html);
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$_html = preg_replace('~</t(d|h)>\s*<t(d|h)[^>]*>~si',' - ',$_html);
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$_html = preg_replace('~<img[^>]+>~s','',$_html);
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// replace emailaddresses eclosed in <> (eg.: <me@you.de>) with the emailaddress only (e.g: me@you.de)
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self::replaceEmailAdresses($_html);
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//convert hrefs to description -> URL
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//$_html = preg_replace('~<a[^>]+href=\"([^"]+)\"[^>]*>(.*)</a>~si','[$2 -> $1]',$_html);
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$_html = preg_replace_callback('~<a[^>]+href=\"([^"]+)\"[^>]*>(.*?)</a>~si','self::transform_url2text',$_html);
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// reducing double \r\n to single ones, dont mess with pre sections
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if ($stripcrl === true && $isHTML)
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{
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if (stripos($_html,'<pre ')!==false || stripos($_html,'<pre>')!==false)
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{
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$contentArr = self::splithtmlByPRE($_html);
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foreach ($contentArr as $k =>&$elem)
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{
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if (stripos($elem,'<pre ')===false && stripos($elem,'<pre>')===false)
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{
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//this is supposed to strip out all remaining stuff in tags, this is sometimes taking out whole sections off content
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if ( $stripalltags ) {
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$_html = preg_replace('~<[^>^@]+>~s','',$_html);
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}
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// strip out whitespace inbetween CR/LF
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$elem = preg_replace('~\r\n\s+\r\n~si', "\r\n\r\n", $elem);
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// strip out / reduce exess CR/LF
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$elem = preg_replace('~\r\n{3,}~si',"\r\n\r\n",$elem);
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}
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}
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$_html = implode('',$contentArr);
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}
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else
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{
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//this is supposed to strip out all remaining stuff in tags, this is sometimes taking out whole sections off content
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if ( $stripalltags ) {
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$_html = preg_replace('~<[^>^@]+>~s','',$_html);
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}
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// strip out whitespace inbetween CR/LF
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$_html = preg_replace('~\r\n\s+\r\n~si', "\r\n\r\n", $_html);
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// strip out / reduce exess CR/LF
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$_html = preg_replace('~(\r\n){3,}~si',"\r\n\r\n",$_html);
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}
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}
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//this is supposed to strip out all remaining stuff in tags, this is sometimes taking out whole sections off content
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if ( $stripalltags ) {
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$_html = preg_replace('~<[^>^@]+>~s','',$_html);
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//$_html = strip_tags($_html, '<a>');
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}
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// reducing spaces (not for input that was plain text from the beginning)
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if ($isHTML) $_html = preg_replace('~ +~s',' ',$_html);
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// restoring ampersands
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$_html = str_replace('#amper#sand#','&',$_html);
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// restoring lower|greater[or equal] than
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$_html = str_replace('#lowerorequal#than#','<=',$_html);
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$_html = str_replace('#greaterorequal#than#','>=',$_html);
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$_html = str_replace('#lower#than#','<',$_html);
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$_html = str_replace('#greater#than#','>',$_html);
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//error_log(__METHOD__.__LINE__.' Charset:'.$displayCharset.' -> '.$_html);
|
|
$_html = html_entity_decode($_html, ENT_COMPAT, $displayCharset);
|
|
//error_log(__METHOD__.__LINE__.' Charset:'.$displayCharset.' After html_entity_decode: -> '.$_html);
|
|
//self::replaceEmailAdresses($_html);
|
|
$pos = strpos($_html, 'blockquote');
|
|
//error_log("convert HTML2Text: $_html");
|
|
if($pos === false) {
|
|
return $_html;
|
|
} else {
|
|
$indent = 0;
|
|
$indentString = '';
|
|
|
|
$quoteParts = preg_split('/#blockquote#type#cite#/', $_html, -1, PREG_SPLIT_OFFSET_CAPTURE);
|
|
foreach($quoteParts as $quotePart) {
|
|
if($quotePart[1] > 0) {
|
|
$indent++;
|
|
$indentString .= '>';
|
|
}
|
|
$quoteParts2 = preg_split('/#blockquote#end#cite#/', $quotePart[0], -1, PREG_SPLIT_OFFSET_CAPTURE);
|
|
|
|
foreach($quoteParts2 as $quotePart2) {
|
|
if($quotePart2[1] > 0) {
|
|
$indent--;
|
|
$indentString = substr($indentString, 0, $indent);
|
|
}
|
|
|
|
$quoteParts3 = explode("\r\n", $quotePart2[0]);
|
|
|
|
foreach($quoteParts3 as $quotePart3) {
|
|
//error_log(__METHOD__.__LINE__.'Line:'.$quotePart3);
|
|
$allowedLength = 76-strlen("\r\n$indentString");
|
|
// only break lines, if not already indented
|
|
if (substr($quotePart3,0,strlen($indentString)) != $indentString)
|
|
{
|
|
if (strlen($quotePart3) > $allowedLength) {
|
|
$s=explode(" ", $quotePart3);
|
|
$quotePart3 = "";
|
|
$linecnt = 0;
|
|
foreach ($s as $k=>$v) {
|
|
$cnt = strlen($v);
|
|
// only break long words within the wordboundaries,
|
|
// but it may destroy links, so we check for href and dont do it if we find it
|
|
if($cnt > $allowedLength && stripos($v,'href=')===false) {
|
|
//error_log(__METHOD__.__LINE__.'LongWordFound:'.$v);
|
|
$v=wordwrap($v, $allowedLength, "\r\n$indentString", true);
|
|
}
|
|
// the rest should be broken at the start of the new word that exceeds the limit
|
|
if ($linecnt+$cnt > $allowedLength) {
|
|
$v="\r\n$indentString$v";
|
|
//error_log(__METHOD__.__LINE__.'breaking here:'.$v);
|
|
$linecnt = 0;
|
|
} else {
|
|
$linecnt += $cnt;
|
|
}
|
|
if (strlen($v)) $quotePart3 .= (strlen($quotePart3) ? " " : "").$v;
|
|
}
|
|
}
|
|
}
|
|
//error_log(__METHOD__.__LINE__.'partString to return:'.$indentString . $quotePart3);
|
|
$asciiTextBuff[] = $indentString . $quotePart3 ;
|
|
}
|
|
}
|
|
}
|
|
return implode("\r\n",$asciiTextBuff);
|
|
}
|
|
}
|
|
|
|
/**
|
|
* split html by PRE tag, return array with all content pre-sections isolated in array elements
|
|
* @author Leithoff, Klaus
|
|
* @param string html
|
|
* @return mixed array of parts or unaffected html
|
|
*/
|
|
static function splithtmlByPRE($html)
|
|
{
|
|
$searchFor = '<pre ';
|
|
$pos = stripos($html,$searchFor);
|
|
if ($pos===false)
|
|
{
|
|
$searchFor = '<pre>';
|
|
$pos = stripos($html,$searchFor);
|
|
}
|
|
if ($pos === false)
|
|
{
|
|
return $html;
|
|
}
|
|
$html2ret[] = substr($html,0,$pos);
|
|
while ($pos!==false)
|
|
{
|
|
$endofpre = stripos($html,'</pre>',$pos);
|
|
$length = $endofpre-$pos+6;
|
|
$html2ret[] = substr($html,$pos,$length);
|
|
$searchFor = '<pre ';
|
|
$pos = stripos($html,$searchFor, $endofpre+6);
|
|
if ($pos===false)
|
|
{
|
|
$searchFor = '<pre>';
|
|
$pos = stripos($html,$searchFor, $endofpre+6);
|
|
}
|
|
$html2ret[] = ($pos ? substr($html,$endofpre+6,$pos-($endofpre+6)): substr($html,$endofpre+6));
|
|
//$pos=false;
|
|
}
|
|
//error_log(__METHOD__.__LINE__.array2string($html2ret));
|
|
return $html2ret;
|
|
}
|
|
}
|