class.t3lib_htmlmail.php

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<?php
/***************************************************************
 *  Copyright notice
 *
 *  (c) 1999-2011 Kasper Skårhøj (kasperYYYY@typo3.com)
 *  All rights reserved
 *
 *  This script is part of the TYPO3 project. The TYPO3 project 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.
 *  A copy is found in the textfile GPL.txt and important notices to the license
 *  from the author is found in LICENSE.txt distributed with these scripts.
 *
 *
 *  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.
 *
 *  This copyright notice MUST APPEAR in all copies of the script!
 ***************************************************************/
/**
 * HTML mail class
 *
 * $Id: class.t3lib_htmlmail.php 10559 2011-02-22 22:27:33Z sgalinsk $
 *
 * @author  Kasper Skårhøj <kasperYYYY@typo3.com>
 */
/**
 * [CLASS/FUNCTION INDEX of SCRIPT]
 *
 *
 *
 *  193: class t3lib_htmlmail
 *  261:     function t3lib_htmlmail ()
 *  268:     function start ()
 *  305:     function useQuotedPrintable()
 *  315:     function useBase64()
 *  326:     function use8Bit()
 *  338:     function encodeMsg($content)
 *  348:     function addPlain ($content)
 *  360:     function addAttachment($file)
 *  378:     function addHTML ($file)
 *  401:     function extractHtmlInit($html,$url)
 *  412:     function send($recipient)
 *
 *            SECTION: Main functions
 *  441:     function setHeaders()
 *  500:     function setRecipient ($recip)
 *  518:     function getHTMLContentType()
 *  527:     function setContent()
 *  554:     function constructMixed ($boundary)
 *  593:     function constructHTML ($boundary)
 *  617:     function constructAlternative($boundary)
 *  638:     function constructHTML_media ($boundary)
 *  691:     function sendTheMail ()
 *  757:     function getBoundary()
 *  769:     function setPlain ($content)
 *  780:     function setHtml ($content)
 *  791:     function add_header($header)
 *  812:     function add_message($string)
 *  823:     function getContent($type)
 *  832:     function preview()
 *
 *            SECTION: Functions for acquiring attachments, HTML, analyzing and so on  **
 *  860:     function fetchHTML($file)
 *  878:     function fetchHTMLMedia()
 *  899:     function extractMediaLinks()
 *  976:     function extractHyperLinks()
 * 1025:     function extractFramesInfo()
 * 1051:     function substMediaNamesInHTML($absolute)
 * 1078:     function substHREFsInHTML()
 * 1106:     function substHTTPurlsInPlainText($content)
 * 1142:     function fixRollOvers()
 *
 *            SECTION: File and URL-functions
 * 1189:     function makeBase64($inputstr)
 * 1200:     function getExtendedURL($url)
 * 1222:     function addUserPass($url)
 * 1238:     function getURL($url)
 * 1250:     function getStrippedURL($url)
 * 1271:     function getMimeType($url)
 * 1300:     function absRef($ref)
 * 1320:     function split_fileref($fileref)
 * 1347:     function extParseUrl($path)
 * 1362:     function tag_regex($tagArray)
 * 1384:     function get_tag_attributes($tag)
 * 1426:     function quoted_printable($string)
 * 1437:     function convertName($name)
 *
 * TOTAL FUNCTIONS: 49
 * (This index is automatically created/updated by the extension "extdeveval")
 *
 */
/**
 * NOTES on MIME mail structures:
 *
 * Plain + HTML
 *   multipart/alternative  (text, html)
 *   multipart/alternative  (text, html)
 *
 * Plain + HTML + image
 *   multipart/related (m/a, cids)
 *       multipart/alternative (text, html)
 *
 *   multipart/related  (m/a, cids)
 *       multipart/alternative  (text, html)
 *
 * plain + attachment
 *   multipart/mixed
 *
 * HTML + Attachment:
 *   multipart/mixed        (text/html , attachments)
 *
 * Plain + HTML + Attachments:
 *   multipart/mixed        (m/a, attachments)
 *       multipart/alternative  (text, html)
 *
 * Plain + HTML + image + attachment
 *
 *       Outlook expr.
 *   multipart/mixed (m/r, attachments)
 *       multipart/related  (m/a, cids)
 *           multipart/alternative  (text, html)
 *
 *
 *
 * FROM RFC 1521:
 *
 * 5.1 Quoted-Printable Content-Transfer-Encoding
 * The Quoted-Printable encoding is intended to represent data that largely consists of octets that correspond to printable characters in the ASCII character set. It encodes the data in such a way that the resulting octets are unlikely to be modified by mail transport. If the data being encoded are mostly ASCII text, the encoded form of the data remains largely recognizable by humans. A body which is entirely ASCII may also be encoded in Quoted-Printable to ensure the integrity of the data should the message pass through a character- translating, and/or line-wrapping gateway.
 *
 * In this encoding, octets are to be represented as determined by the following rules:
 * Rule #1: (General 8-bit representation) Any octet, except those indicating a line break according to the newline convention of the canonical (standard) form of the data being encoded, may be represented by an "=" followed by a two digit hexadecimal representation of the octet's value. The digits of the hexadecimal alphabet, for this purpose, are "0123456789ABCDEF". Uppercase letters must be used when sending hexadecimal data, though a robust implementation may choose to recognize lowercase letters on receipt. Thus, for example, the value 12 (ASCII form feed) can be represented by "=0C", and the value 61 (ASCII EQUAL SIGN) can be represented by "=3D". Except when the following rules allow an alternative encoding, this rule is mandatory.
 * Rule #2: (Literal representation) Octets with decimal values of 33 through 60 inclusive, and 62 through 126, inclusive, MAY be represented as the ASCII characters which correspond to those octets (EXCLAMATION POINT through LESS THAN, and GREATER THAN through TILDE, respectively).
 * Rule #3: (White Space): Octets with values of 9 and 32 MAY be represented as ASCII TAB (HT) and SPACE characters, respectively, but MUST NOT be so represented at the end of an encoded line. Any TAB (HT) or SPACE characters on an encoded line MUST thus be followed on that line by a printable character. In particular, an
 * "=" at the end of an encoded line, indicating a soft line break (see rule #5) may follow one or more TAB (HT) or SPACE characters. It follows that an octet with value 9 or 32 appearing at the end of an encoded line must be represented according to Rule #1. This rule is necessary because some MTAs (Message Transport Agents, programs which transport messages from one user to another, or perform a part of such transfers) are known to pad lines of text with SPACEs, and others are known to remove "white space" characters from the end of a line. Therefore, when decoding a Quoted-Printable body, any trailing white space on a line must be deleted, as it will necessarily have been added by intermediate transport agents.
 * Rule #4 (Line Breaks): A line break in a text body, independent of what its representation is following the canonical representation of the data being encoded, must be represented by a (RFC 822) line break, which is a CRLF sequence, in the Quoted-Printable encoding. Since the canonical representation of types other than text do not generally include the representation of line breaks, no hard line breaks (i.e. line breaks that are intended to be meaningful and to be displayed to the user) should occur in the quoted-printable encoding of such types. Of course, occurrences of "=0D", "=0A", "0A=0D" and "=0D=0A" will eventually be encountered. In general, however, base64 is preferred over quoted-printable for binary data.
 * Note that many implementations may elect to encode the local representation of various content types directly, as described in Appendix G. In particular, this may apply to plain text material on systems that use newline conventions other than CRLF delimiters. Such an implementation is permissible, but the generation of line breaks must be generalized to account for the case where alternate representations of newline sequences are used.
 * Rule #5 (Soft Line Breaks): The Quoted-Printable encoding REQUIRES that encoded lines be no more than 76 characters long. If longer lines are to be encoded with the Quoted-Printable encoding, 'soft' line breaks must be used. An equal sign as the last character on a encoded line indicates such a non-significant ('soft') line break in the encoded text. Thus if the "raw" form of the line is a single unencoded line that says:
 * Now's the time for all folk to come to the aid of their country.
 *
 * This can be represented, in the Quoted-Printable encoding, as
 *
 * Now's the time =
 * for all folk to come=
 * to the aid of their country.
 *
 * This provides a mechanism with which long lines are encoded in such a way as to be restored by the user agent. The 76 character limit does not count the trailing CRLF, but counts all other characters, including any equal signs.
 * Since the hyphen character ("-") is represented as itself in the Quoted-Printable encoding, care must be taken, when encapsulating a quoted-printable encoded body in a multipart entity, to ensure that the encapsulation boundary does not appear anywhere in the encoded body. (A good strategy is to choose a boundary that includes a character sequence such as "=_" which can never appear in a quoted- printable body. See the definition of multipart messages later in this document.)
 * NOTE: The quoted-printable encoding represents something of a compromise between readability and reliability in transport. Bodies encoded with the quoted-printable encoding will work reliably over most mail gateways, but may not work perfectly over a few gateways, notably those involving translation into EBCDIC. (In theory, an EBCDIC gateway could decode a quoted-printable body and re-encode it using base64, but such gateways do not yet exist.) A higher level of confidence is offered by the base64 Content-Transfer-Encoding. A way to get reasonably reliable transport through EBCDIC gateways is to also quote the ASCII characters
 * !"#$@[\]^`{|}~
 * according to rule #1. See Appendix B for more information.
 * Because quoted-printable data is generally assumed to be line- oriented, it is to be expected that the representation of the breaks between the lines of quoted printable data may be altered in transport, in the same manner that plain text mail has always been altered in Internet mail when passing between systems with differing newline conventions. If such alterations are likely to constitute a corruption of the data, it is probably more sensible to use the base64 encoding rather than the quoted-printable encoding.
 * WARNING TO IMPLEMENTORS: If binary data are encoded in quoted- printable, care must be taken to encode CR and LF characters as "=0D" and "=0A", respectively. In particular, a CRLF sequence in binary data should be encoded as "=0D=0A". Otherwise, if CRLF were represented as a hard line break, it might be incorrectly decoded on
 * platforms with different line break conventions.
 * For formalists, the syntax of quoted-printable data is described by the following grammar:
 *
 *  quoted-printable := ([*(ptext / SPACE / TAB) ptext] ["="] CRLF)
 *       ; Maximum line length of 76 characters excluding CRLF
 *
 *  ptext := octet /<any ASCII character except "=", SPACE, or TAB>
 *       ; characters not listed as "mail-safe" in Appendix B
 *       ; are also not recommended.
 *
 *  octet := "=" 2(DIGIT / "A" / "B" / "C" / "D" / "E" / "F")
 *       ; octet must be used for characters > 127, =, SPACE, or TAB,
 *       ; and is recommended for any characters not listed in
 *       ; Appendix B as "mail-safe".
 */
/**
 * HTML mail class
 *
 * @author  Kasper Skårhøj <kasperYYYY@typo3.com>
 * @package TYPO3
 * @subpackage  t3lib
 */
class t3lib_htmlmail {
        // Headerinfo:
    var $recipient = '';
    var $recipient_copy = ''; // This recipient (or list of...) will also receive the mail. Regard it as a copy.
    var $recipient_blindcopy = ''; // This recipient (or list of...) will also receive the mail as a blind copy. Regard it as a copy.
    var $subject = '';
    var $from_email = '';
    var $from_name = '';
    var $replyto_email = '';
    var $replyto_name = '';
    var $organisation = '';
    var $priority = 3; // 1 = highest, 5 = lowest, 3 = normal
    var $mailer = ''; // X-mailer, set to TYPO3 Major.Minor in constructor
    var $alt_base64 = 0;
    var $alt_8bit = 0;
    var $jumperURL_prefix = ''; // This is a prefix that will be added to all links in the mail. Example: 'http://www.mydomain.com/jump?userid=###FIELD_uid###&url='. if used, anything after url= is urlencoded.
    var $jumperURL_useId = 0; // If set, then the array-key of the urls are inserted instead of the url itself. Smart in order to reduce link-length
    var $mediaList = ''; // If set, this is a list of the media-files (index-keys to the array) that should be represented in the html-mail
    var $http_password = '';
    var $http_username = '';
    var $postfix_version1 = FALSE;

        // Internal
    /*
    This is how the $theParts-array is normally looking
    var $theParts = array(
        'plain' => array(
            'content' => ''
        ),
        'html' => array(
            'content' => '',
            'path' => '',
            'media' => array(),
            'hrefs' => array()
        ),
        'attach' => array()
    );
    */
    var $theParts = array();

    var $messageid = '';
    var $returnPath = '';
    var $Xid = '';
    var $dontEncodeHeader = FALSE; // If set, the header will not be encoded

    var $headers = '';
    var $message = '';
    var $part = 0;
    var $image_fullpath_list = '';
    var $href_fullpath_list = '';

    var $plain_text_header = '';
    var $html_text_header = '';
    var $charset = '';
    var $defaultCharset = 'iso-8859-1';


    /**
     * Constructor. If the configuration variable forceReturnPath is set,
     * calls to mail will be called with a 5th parameter.
     * See function sendTheMail for more info
     *
     * @return  void
     */
    public function t3lib_htmlmail() {
        t3lib_div::logDeprecatedFunction();
        $this->forceReturnPath = $GLOBALS['TYPO3_CONF_VARS']['SYS']['forceReturnPath'];

        $this->mailer = 'TYPO3';
    }


    /**
     * start action that sets the message ID and the charset
     *
     * @return  void
     */
    public function start() {
        global $TYPO3_CONF_VARS;

            // Sets the message id
        $host = t3lib_div::getHostname();
        if (!$host || $host == '127.0.0.1' || $host == 'localhost' || $host == 'localhost.localdomain') {
            $host = ($TYPO3_CONF_VARS['SYS']['sitename'] ? preg_replace('/[^A-Za-z0-9_\-]/', '_', $TYPO3_CONF_VARS['SYS']['sitename']) : 'localhost') . '.TYPO3';
        }

        $idLeft = time() . '.' . uniqid();
        $idRight = !empty($_SERVER['SERVER_NAME']) ? $_SERVER['SERVER_NAME'] : 'swift.generated';
        $this->messageid = $idLeft . '@' . $idRight;

            // Default line break for Unix systems.
        $this->linebreak = LF;
            // Line break for Windows. This is needed because PHP on Windows systems
            // send mails via SMTP instead of using sendmail, and thus the linebreak needs to be \r\n.
        if (TYPO3_OS == 'WIN') {
            $this->linebreak = CRLF;
        }

            // Sets the Charset
        if (!$this->charset) {
            if (is_object($GLOBALS['TSFE']) && $GLOBALS['TSFE']->renderCharset) {
                $this->charset = $GLOBALS['TSFE']->renderCharset;
            } elseif (is_object($GLOBALS['LANG']) && $GLOBALS['LANG']->charSet) {
                $this->charset = $GLOBALS['LANG']->charSet;
            } elseif ($GLOBALS['TYPO3_CONF_VARS']['BE']['forceCharset']) {
                $this->charset = $GLOBALS['TYPO3_CONF_VARS']['BE']['forceCharset'];
            } else {
                $this->charset = $this->defaultCharset;
            }
        }

            // Use quoted-printable headers by default
        $this->useQuotedPrintable();
    }


    /**
     * sets the header of both Plain Text and HTML mails to quoted printable
     *
     * @return  void
     */
    public function useQuotedPrintable() {
        $this->plain_text_header = 'Content-Type: text/plain; charset=' . $this->charset . $this->linebreak . 'Content-Transfer-Encoding: quoted-printable';
        $this->html_text_header = 'Content-Type: text/html; charset=' . $this->charset . $this->linebreak . 'Content-Transfer-Encoding: quoted-printable';
    }

    /**
     * sets the encoding headers to base64 for both the Plain Text and HTML mail
     *
     * @return  void
     */
    public function useBase64() {
        $this->plain_text_header = 'Content-Type: text/plain; charset=' . $this->charset . $this->linebreak . 'Content-Transfer-Encoding: base64';
        $this->html_text_header = 'Content-Type: text/html; charset=' . $this->charset . $this->linebreak . 'Content-Transfer-Encoding: base64';
        $this->alt_base64 = 1;
    }


    /**
     * sets the encoding to 8bit and the current charset of both the Plain Text and the HTML mail
     *
     * @return  void
     */
    public function use8Bit() {
        $this->plain_text_header = 'Content-Type: text/plain; charset=' . $this->charset . $this->linebreak . 'Content-Transfer-Encoding: 8bit';
        $this->html_text_header = 'Content-Type: text/html; charset=' . $this->charset . $this->linebreak . 'Content-Transfer-Encoding: 8bit';
        $this->alt_8bit = 1;
    }


    /**
     * Encodes the message content according to the options "alt_base64" and "alt_8bit" (no need to encode here)
     * or to "quoted_printable" if no option is set.
     *
     * @param   string      $content the content that will be encoded
     * @return  string      the encoded content
     */
    public function encodeMsg($content) {
        if ($this->alt_base64) {
            return $this->makeBase64($content);
        } elseif ($this->alt_8bit) {
            return $content;
        } else {
            return t3lib_div::quoted_printable($content);
        }
    }


    /**
     * Adds plain-text, replaces the HTTP urls in the plain text and then encodes it
     *
     * @param   string      $content that will be added
     * @return  void
     */
    public function addPlain($content) {
        $content = $this->substHTTPurlsInPlainText($content);
        $this->setPlain($this->encodeMsg($content));
    }


    /**
     * Adds an attachment to the mail
     *
     * @param   string      $file: the filename to add
     * @return  boolean     whether the attachment was added or not
     */
    public function addAttachment($file) {
            // Fetching the content and the mime-type
        $fileInfo = $this->getExtendedURL($file);
        if ($fileInfo) {
            if (!$fileInfo['content_type']) {
                $fileInfo['content_type'] = 'application/octet-stream';
            }
            $temp = $this->split_fileref($file);
            if ($temp['file']) {
                $fileInfo['filename'] = $temp['file'];
            } elseif (strpos(' ' . $fileInfo['content_type'], 'htm')) {
                $fileInfo['filename'] = 'index.html';
            } else {
                $fileInfo['filename'] = 'unknown';
            }
            $this->theParts['attach'][] = $fileInfo;
            return TRUE;
        }
        return FALSE;
    }


    /**
     * Adds HTML and media, encodes it from a URL or file
     *
     * @param   string      $file: the filename to add
     * @return  boolean     whether the attachment was added or not
     */
    public function addHTML($file) {
        $status = $this->fetchHTML($file);
        if (!$status) {
            return FALSE;
        }
        if ($this->extractFramesInfo()) {
            return 'Document was a frameset. Stopped';
        }
        $this->extractMediaLinks();
        $this->extractHyperLinks();
        $this->fetchHTMLMedia();
        $this->substMediaNamesInHTML(0); // 0 = relative
        $this->substHREFsInHTML();
        $this->setHtml($this->encodeMsg($this->theParts['html']['content']));
    }


    /**
     * Extract HTML-parts, used externally
     *
     * @param   string      $html: will be added to the html "content" part
     * @param   string      $url: will be added to the html "path" part
     * @return  void
     */
    public function extractHtmlInit($html, $url) {
        $this->theParts['html']['content'] = $html;
        $this->theParts['html']['path'] = $url;
    }


    /**
     * Assembles the message by headers and content and finally send it to the provided recipient.
     *
     * @param   string      $recipient: The recipient the message should be delivered to (if blank, $this->recipient will be used instead)
     * @return  boolean     Returns whether the mail was sent (successfully accepted for delivery)
     */
    public function send($recipient) {
        if ($recipient) {
            $this->recipient = $recipient;
        }
        $this->setHeaders();
        $this->setContent();
        $mailWasSent = $this->sendTheMail();
        return $mailWasSent;
    }


    /*****************************************
     *
     * Main functions
     *
     *****************************************/

    /**
     * Clears the header-string and sets the headers based on object-vars.
     *
     * @return  void
     */
    public function setHeaders() {
        $this->headers = '';
            // Message_id
        $this->add_header('Message-ID: <' . $this->messageid . '>');
            // Return path
        if ($this->returnPath) {
            $this->add_header('Return-Path: ' . $this->returnPath);
            $this->add_header('Errors-To: ' . $this->returnPath);
        }
            // X-id
        if ($this->Xid) {
            $this->add_header('X-Typo3MID: ' . $this->Xid);
        }

            // From
        if ($this->from_email) {
            if ($this->from_name && !t3lib_div::isBrokenEmailEnvironment()) {
                $this->add_header('From: ' . $this->from_name . ' <' . $this->from_email . '>');
            } else {
                $this->add_header('From: ' . $this->from_email);
            }
        }

            // Cc
        if ($this->recipient_copy) {
            $this->add_header('Cc: ' . $this->recipient_copy);
        }

            // Bcc
        if ($this->recipient_blindcopy) {
            $this->add_header('Bcc: ' . $this->recipient_blindcopy);
        }

            // Reply
        if ($this->replyto_email) {
            if ($this->replyto_name) {
                $this->add_header('Reply-To: ' . $this->replyto_name . ' <' . $this->replyto_email . '>');
            } else {
                $this->add_header('Reply-To: ' . $this->replyto_email);
            }
        }
            // Organization, using american english spelling (organization / organisation) as defined in RFC 1036 / 2076
        if ($this->organisation) {
            $this->add_header('Organization: ' . $this->organisation);
        }
            // mailer
        if ($this->mailer) {
            $this->add_header('X-Mailer: ' . $this->mailer);
        }
            // priority
        if ($this->priority) {
            $this->add_header('X-Priority: ' . $this->priority);
        }
        $this->add_header('Mime-Version: 1.0');

        if (!$this->dontEncodeHeader) {
            $enc = $this->alt_base64 ? 'base64' : 'quoted_printable'; // Header must be ASCII, therefore only base64 or quoted_printable are allowed!
                // Quote recipient and subject
            $this->recipient = t3lib_div::encodeHeader($this->recipient, $enc, $this->charset);
            $this->subject = t3lib_div::encodeHeader($this->subject, $enc, $this->charset);
        }
    }


    /**
     * Sets the recipient(s). If you supply a string, you set one recipient.
     * If you supply an array, every value is added as a recipient.
     *
     * @param   mixed       $recipient: the recipient(s) to set
     * @return  void
     */
    public function setRecipient($recipient) {
        $this->recipient = (is_array($recipient) ? implode(',', $recipient) : $recipient);
    }


    /**
     * Returns the content type based on whether the mail has media / attachments or no
     *
     * @return  string      the content type
     */
    public function getHTMLContentType() {
        return (count($this->theParts['html']['media']) ? 'multipart/related' : 'multipart/alternative');
    }


    /**
     * Begins building the message-body
     *
     * @return  void
     */
    public function setContent() {
        $this->message = '';
        $boundary = $this->getBoundary();

            // Setting up headers
        if (count($this->theParts['attach'])) {
                // Generate (plain/HTML) / attachments
            $this->add_header('Content-Type: multipart/mixed;');
            $this->add_header(' boundary="' . $boundary . '"');
            $this->add_message('This is a multi-part message in MIME format.' . LF);
            $this->constructMixed($boundary);
        } elseif ($this->theParts['html']['content']) {
                // Generate plain/HTML mail
            $this->add_header('Content-Type: ' . $this->getHTMLContentType() . ';');
            $this->add_header(' boundary="' . $boundary . '"');
            $this->add_message('This is a multi-part message in MIME format.' . LF);
            $this->constructHTML($boundary);
        } else {
                // Generate plain only
            $this->add_header($this->plain_text_header);
            $this->add_message($this->getContent('plain'));
        }
    }


    /**
     * This functions combines the plain / HTML content with the attachments
     *
     * @param   string      $boundary: the mail boundary
     * @return  void
     */
    public function constructMixed($boundary) {
        $this->add_message('--' . $boundary);

        if ($this->theParts['html']['content']) {
                // HTML and plain is added
            $newBoundary = $this->getBoundary();
            $this->add_message('Content-Type: ' . $this->getHTMLContentType() . ';');
            $this->add_message(' boundary="' . $newBoundary . '"');
            $this->add_message('');
            $this->constructHTML($newBoundary);
        } else {
                // Purely plain
            $this->add_message($this->plain_text_header);
            $this->add_message('');
            $this->add_message($this->getContent('plain'));
        }
            // attachments are added
        if (is_array($this->theParts['attach'])) {
            foreach ($this->theParts['attach'] as $media) {
                $this->add_message('--' . $boundary);
                $this->add_message('Content-Type: ' . $media['content_type'] . ';');
                $this->add_message(' name="' . $media['filename'] . '"');
                $this->add_message('Content-Transfer-Encoding: base64');
                $this->add_message('Content-Disposition: attachment;');
                $this->add_message(' filename="' . $media['filename'] . '"');
                $this->add_message('');
                $this->add_message($this->makeBase64($media['content']));
            }
        }
        $this->add_message('--' . $boundary . '--' . LF);
    }


    /**
     * this function creates the HTML part of the mail
     *
     * @param   string      $boundary: the boundary to use
     * @return  void
     */
    public function constructHTML($boundary) {
            // If media, then we know, the multipart/related content-type has been set before this function call
        if (count($this->theParts['html']['media'])) {
            $this->add_message('--' . $boundary);
                // HTML has media
            $newBoundary = $this->getBoundary();
            $this->add_message('Content-Type: multipart/alternative;');
            $this->add_message(' boundary="' . $newBoundary . '"');
            $this->add_message('Content-Transfer-Encoding: 7bit');
            $this->add_message('');

                // Adding the plaintext/html mix, and use $newBoundary
            $this->constructAlternative($newBoundary);
            $this->constructHTML_media($boundary);
        } else {
                // if no media, just use the $boundary for adding plaintext/html mix
            $this->constructAlternative($boundary);
        }
    }


    /**
     * Here plain is combined with HTML
     *
     * @param   string      $boundary: the boundary to use
     * @return  void
     */
    public function constructAlternative($boundary) {
        $this->add_message('--' . $boundary);

            // plain is added
        $this->add_message($this->plain_text_header);
        $this->add_message('');
        $this->add_message($this->getContent('plain'));
        $this->add_message('--' . $boundary);

            // html is added
        $this->add_message($this->html_text_header);
        $this->add_message('');
        $this->add_message($this->getContent('html'));
        $this->add_message('--' . $boundary . '--' . LF);
    }


    /**
     * Constructs the HTML-part of message if the HTML contains media
     *
     * @param   string      $boundary: the boundary to use
     * @return  void
     */
    public function constructHTML_media($boundary) {
            // media is added
        if (is_array($this->theParts['html']['media'])) {
            foreach ($this->theParts['html']['media'] as $key => $media) {
                if (!$this->mediaList || t3lib_div::inList($this->mediaList, $key)) {
                    $this->add_message('--' . $boundary);
                    $this->add_message('Content-Type: ' . $media['ctype']);
                    $this->add_message('Content-ID: <part' . $key . '.' . $this->messageid . '>');
                    $this->add_message('Content-Transfer-Encoding: base64');
                    $this->add_message('');
                    $this->add_message($this->makeBase64($media['content']));
                }
            }
        }
        $this->add_message('--' . $boundary . '--' . LF);
    }


    /**
     * Sends the mail by calling the mail() function in php. On Linux systems this will invoke the MTA
     * defined in php.ini (sendmail -t -i by default), on Windows a SMTP must be specified in the sys.ini.
     * Most common MTA's on Linux has a Sendmail interface, including Postfix and Exim.
     * For setting the return-path correctly, the parameter -f has to be added to the system call to sendmail.
     * This obviously does not have any effect on Windows, but on Sendmail compliant systems this works. If safe mode
     * is enabled, then extra parameters is not allowed, so a safe mode check is made before the mail() command is
     * invoked. When using the -f parameter, some MTA's will put an X-AUTHENTICATION-WARNING saying that
     * the return path was modified manually with the -f flag. To disable this warning make sure that the user running
     * Apache is in the /etc/mail/trusted-users table.
     *
     * POSTFIX: With postfix version below 2.0 there is a problem that the -f parameter can not be used in conjunction
     * with -t. Postfix will give an error in the maillog:
     *
     *  cannot handle command-line recipients with -t
     *
     * The -f parameter is only enabled if the parameter forceReturnPath is enabled in the install tool.
     *
     * This whole problem of return-path turns out to be quite tricky. If you have a solution that works better, on all
     * standard MTA's then we are very open for suggestions.
     *
     * With time this function should be made such that several ways of sending the mail is possible (local MTA, smtp other).
     *
     * @return  boolean     Returns whether the mail was sent (successfully accepted for delivery)
     */
    public function sendTheMail() {
        $mailWasSent = FALSE;

            // Sending the mail requires the recipient and message to be set.
        if (!trim($this->recipient) || !trim($this->message)) {
            return FALSE;
        }

            // On windows the -f flag is not used (specific for Sendmail and Postfix),
            // but instead the php.ini parameter sendmail_from is used.
        $returnPath = ($this->forceReturnPath && strlen($this->returnPath) > 0) ? '-f ' . escapeshellarg($this->returnPath) : '';
        if (TYPO3_OS == 'WIN' && $this->returnPath) {
            @ini_set('sendmail_from', t3lib_div::normalizeMailAddress($this->returnPath));
        }
        $recipient = t3lib_div::normalizeMailAddress($this->recipient);

            // If safe mode is on, the fifth parameter to mail is not allowed, so the fix wont work on unix with safe_mode=On
        $returnPathPossible = (!t3lib_utility_PhpOptions::isSafeModeEnabled() && $this->forceReturnPath);
        if ($returnPathPossible) {
            $mailWasSent = t3lib_utility_Mail::mail(
                $recipient,
                $this->subject,
                $this->message,
                $this->headers,
                $returnPath
            );
        } else {
            $mailWasSent = t3lib_utility_Mail::mail(
                $recipient,
                $this->subject,
                $this->message,
                $this->headers
            );
        }

            // Auto response
        if ($this->auto_respond_msg) {
            $theParts = explode('/', $this->auto_respond_msg, 2);
            $theParts[0] = str_replace('###SUBJECT###', $this->subject, $theParts[0]);
            $theParts[1] = str_replace("/", LF, $theParts[1]);
            $theParts[1] = str_replace("###MESSAGE###", $this->getContent('plain'), $theParts[1]);
            if ($returnPathPossible) {
                $mailWasSent = t3lib_utility_Mail::mail(
                    $this->from_email,
                    $theParts[0],
                    $theParts[1],
                    'From: ' . $recipient . $this->linebreak . $this->plain_text_header,
                    $returnPath
                );
            } else {
                $mailWasSent = t3lib_utility_Mail::mail(
                    $this->from_email,
                    $theParts[0],
                    $theParts[1],
                    'From: ' . $recipient . $this->linebreak . $this->plain_text_header
                );
            }
        }
        if ($this->returnPath) {
            ini_restore('sendmail_from');
        }
        return $mailWasSent;
    }


    /**
     * Returns boundaries
     *
     * @return  string  the boundary
     */
    public function getBoundary() {
        $this->part++;
        return "----------" . uniqid("part_" . $this->part . "_");
    }


    /**
     * Sets the plain-text part. No processing done.
     *
     * @param   string      $content: the plain content
     * @return  void
     */
    public function setPlain($content) {
        $this->theParts['plain']['content'] = $content;
    }


    /**
     * Sets the HTML-part. No processing done.
     *
     * @param   string      $content: the HTML content
     * @return  void
     */
    public function setHtml($content) {
        $this->theParts['html']['content'] = $content;
    }


    /**
     * Adds a header to the mail. Use this AFTER the setHeaders()-function
     *
     * @param   string      $header: the header in form of "key: value"
     * @return  void
     */
    public function add_header($header) {
            // Mail headers must be ASCII, therefore we convert the whole header to either base64 or quoted_printable
        if (!$this->dontEncodeHeader && !stristr($header, 'Content-Type') && !stristr($header, 'Content-Transfer-Encoding')) {
                // Field tags must not be encoded
            $parts = explode(': ', $header, 2);
            if (count($parts) == 2) {
                $enc = $this->alt_base64 ? 'base64' : 'quoted_printable';
                $parts[1] = t3lib_div::encodeHeader($parts[1], $enc, $this->charset);
                $header = implode(': ', $parts);
            }
        }

        $this->headers .= $header . LF;
    }


    /**
     * Adds a line of text to the mail-body. Is normally used internally
     *
     * @param   string      $msg: the message to add
     * @return  void
     */
    public function add_message($msg) {
        $this->message .= $msg . LF;
    }


    /**
     * returns the content specified by the type (plain, html etc.)
     *
     * @param   string      $type: the content type, can either plain or html
     * @return  void
     */
    public function getContent($type) {
        return $this->theParts[$type]['content'];
    }


    /**
     * shows a preview of the email of the headers and the message
     *
     * @return  void
     */
    public function preview() {
        echo nl2br(htmlspecialchars($this->headers));
        echo "<BR>";
        echo nl2br(htmlspecialchars($this->message));
    }


    /****************************************************
     *
     * Functions for acquiring attachments, HTML, analyzing and so on  **
     *
     ***************************************************/

    /**
     * Fetches the HTML-content from either url og local serverfile
     *
     * @param   string      $file: the file to load
     * @return  boolean     whether the data was fetched or not
     */
    public function fetchHTML($file) {
            // Fetches the content of the page
        $this->theParts['html']['content'] = $this->getURL($file);
        if ($this->theParts['html']['content']) {
            $addr = $this->extParseUrl($file);
            $path = ($addr['scheme']) ? $addr['scheme'] . '://' . $addr['host'] . (($addr['port']) ? ':' . $addr['port'] : '') . (($addr['filepath']) ? $addr['filepath'] : '/') : $addr['filepath'];
            $this->theParts['html']['path'] = $path;
            return TRUE;
        } else {
            return FALSE;
        }
    }


    /**
     * Fetches the mediafiles which are found by extractMediaLinks()
     *
     * @return  void
     */
    public function fetchHTMLMedia() {
        if (!is_array($this->theParts['html']['media']) || !count($this->theParts['html']['media'])) {
            return;
        }
        foreach ($this->theParts['html']['media'] as $key => $media) {
                // fetching the content and the mime-type
            $picdata = $this->getExtendedURL($this->theParts['html']['media'][$key]['absRef']);
            if (is_array($picdata)) {
                $this->theParts['html']['media'][$key]['content'] = $picdata['content'];
                $this->theParts['html']['media'][$key]['ctype'] = $picdata['content_type'];
            }
        }
    }


    /**
     * extracts all media-links from $this->theParts['html']['content']
     *
     * @return  void
     */
    public function extractMediaLinks() {
        $html_code = $this->theParts['html']['content'];
        $attribRegex = $this->tag_regex(array('img', 'table', 'td', 'tr', 'body', 'iframe', 'script', 'input', 'embed'));

            // split the document by the beginning of the above tags
        $codepieces = preg_split($attribRegex, $html_code);
        $len = strlen($codepieces[0]);
        $pieces = count($codepieces);
        $reg = array();
        for ($i = 1; $i < $pieces; $i++) {
            $tag = strtolower(strtok(substr($html_code, $len + 1, 10), ' '));
            $len += strlen($tag) + strlen($codepieces[$i]) + 2;
            $dummy = preg_match('/[^>]*/', $codepieces[$i], $reg);
            $attributes = $this->get_tag_attributes($reg[0]); // Fetches the attributes for the tag
            $imageData = array();

                // Finds the src or background attribute
            $imageData['ref'] = ($attributes['src'] ? $attributes['src'] : $attributes['background']);
            if ($imageData['ref']) {
                    // find out if the value had quotes around it
                $imageData['quotes'] = (substr($codepieces[$i], strpos($codepieces[$i], $imageData['ref']) - 1, 1) == '"') ? '"' : '';
                    // subst_str is the string to look for, when substituting lateron
                $imageData['subst_str'] = $imageData['quotes'] . $imageData['ref'] . $imageData['quotes'];
                if ($imageData['ref'] && !strstr($this->image_fullpath_list, "|" . $imageData["subst_str"] . "|")) {
                    $this->image_fullpath_list .= "|" . $imageData['subst_str'] . "|";
                    $imageData['absRef'] = $this->absRef($imageData['ref']);
                    $imageData['tag'] = $tag;
                    $imageData['use_jumpurl'] = $attributes['dmailerping'] ? 1 : 0;
                    $this->theParts['html']['media'][] = $imageData;
                }
            }
        }

            // Extracting stylesheets
        $attribRegex = $this->tag_regex(array('link'));
            // Split the document by the beginning of the above tags
        $codepieces = preg_split($attribRegex, $html_code);
        $pieces = count($codepieces);
        for ($i = 1; $i < $pieces; $i++) {
            $dummy = preg_match('/[^>]*/', $codepieces[$i], $reg);
                // fetches the attributes for the tag
            $attributes = $this->get_tag_attributes($reg[0]);
            $imageData = array();
            if (strtolower($attributes['rel']) == 'stylesheet' && $attributes['href']) {
                    // Finds the src or background attribute
                $imageData['ref'] = $attributes['href'];
                    // Finds out if the value had quotes around it
                $imageData['quotes'] = (substr($codepieces[$i], strpos($codepieces[$i], $imageData['ref']) - 1, 1) == '"') ? '"' : '';
                    // subst_str is the string to look for, when substituting lateron
                $imageData['subst_str'] = $imageData['quotes'] . $imageData['ref'] . $imageData['quotes'];
                if ($imageData['ref'] && !strstr($this->image_fullpath_list, "|" . $imageData["subst_str"] . "|")) {
                    $this->image_fullpath_list .= "|" . $imageData["subst_str"] . "|";
                    $imageData['absRef'] = $this->absRef($imageData["ref"]);
                    $this->theParts['html']['media'][] = $imageData;
                }
            }
        }

            // fixes javascript rollovers
        $codepieces = explode('.src', $html_code);
        $pieces = count($codepieces);
        $expr = '/^[^' . quotemeta('"') . quotemeta("'") . ']*/';
        for ($i = 1; $i < $pieces; $i++) {
            $temp = $codepieces[$i];
            $temp = trim(str_replace('=', '', trim($temp)));
            preg_match($expr, substr($temp, 1, strlen($temp)), $reg);
            $imageData['ref'] = $reg[0];
            $imageData['quotes'] = substr($temp, 0, 1);
                // subst_str is the string to look for, when substituting lateron
            $imageData['subst_str'] = $imageData['quotes'] . $imageData['ref'] . $imageData['quotes'];
            $theInfo = $this->split_fileref($imageData['ref']);

            switch ($theInfo['fileext']) {
                case 'gif':
                case 'jpeg':
                case 'jpg':
                    if ($imageData['ref'] && !strstr($this->image_fullpath_list, "|" . $imageData["subst_str"] . "|")) {
                        $this->image_fullpath_list .= "|" . $imageData['subst_str'] . "|";
                        $imageData['absRef'] = $this->absRef($imageData['ref']);
                        $this->theParts['html']['media'][] = $imageData;
                    }
                    break;
            }
        }
    }


    /**
     * extracts all hyper-links from $this->theParts["html"]["content"]
     *
     * @return  void
     */
    public function extractHyperLinks() {
        $html_code = $this->theParts['html']['content'];
        $attribRegex = $this->tag_regex(array('a', 'form', 'area'));
        $codepieces = preg_split($attribRegex, $html_code); // Splits the document by the beginning of the above tags
        $len = strlen($codepieces[0]);
        $pieces = count($codepieces);
        for ($i = 1; $i < $pieces; $i++) {
            $tag = strtolower(strtok(substr($html_code, $len + 1, 10), " "));
            $len += strlen($tag) + strlen($codepieces[$i]) + 2;

            $dummy = preg_match('/[^>]*/', $codepieces[$i], $reg);
                // Fetches the attributes for the tag
            $attributes = $this->get_tag_attributes($reg[0]);
            $hrefData = array();
            $hrefData['ref'] = ($attributes['href'] ? $attributes['href'] : $hrefData['ref'] = $attributes['action']);
            if ($hrefData['ref']) {
                    // Finds out if the value had quotes around it
                $hrefData['quotes'] = (substr($codepieces[$i], strpos($codepieces[$i], $hrefData["ref"]) - 1, 1) == '"') ? '"' : '';
                    // subst_str is the string to look for, when substituting lateron
                $hrefData['subst_str'] = $hrefData['quotes'] . $hrefData['ref'] . $hrefData['quotes'];
                if ($hrefData['ref'] && substr(trim($hrefData['ref']), 0, 1) != "#" && !strstr($this->href_fullpath_list, "|" . $hrefData['subst_str'] . "|")) {
                    $this->href_fullpath_list .= "|" . $hrefData['subst_str'] . "|";
                    $hrefData['absRef'] = $this->absRef($hrefData['ref']);
                    $hrefData['tag'] = $tag;
                    $this->theParts['html']['hrefs'][] = $hrefData;
                }
            }
        }
            // Extracts TYPO3 specific links made by the openPic() JS function
        $codepieces = explode("onClick=\"openPic('", $html_code);
        $pieces = count($codepieces);
        for ($i = 1; $i < $pieces; $i++) {
            $showpic_linkArr = explode("'", $codepieces[$i]);
            $hrefData['ref'] = $showpic_linkArr[0];
            if ($hrefData['ref']) {
                $hrefData['quotes'] = "'";
                    // subst_str is the string to look for, when substituting lateron
                $hrefData['subst_str'] = $hrefData['quotes'] . $hrefData['ref'] . $hrefData['quotes'];
                if ($hrefData['ref'] && !strstr($this->href_fullpath_list, "|" . $hrefData['subst_str'] . "|")) {
                    $this->href_fullpath_list .= "|" . $hrefData['subst_str'] . "|";
                    $hrefData['absRef'] = $this->absRef($hrefData['ref']);
                    $this->theParts['html']['hrefs'][] = $hrefData;
                }
            }
        }
    }


    /**
     * extracts all media-links from $this->theParts["html"]["content"]
     *
     * @return  array   two-dimensional array with information about each frame
     */
    public function extractFramesInfo() {
        $htmlCode = $this->theParts['html']['content'];
        $info = array();
        if (strpos(' ' . $htmlCode, '<frame ')) {
            $attribRegex = $this->tag_regex('frame');
                // Splits the document by the beginning of the above tags
            $codepieces = preg_split($attribRegex, $htmlCode, 1000000);
            $pieces = count($codepieces);
            for ($i = 1; $i < $pieces; $i++) {
                $dummy = preg_match('/[^>]*/', $codepieces[$i], $reg);
                    // Fetches the attributes for the tag
                $attributes = $this->get_tag_attributes($reg[0]);
                $frame = array();
                $frame['src'] = $attributes['src'];
                $frame['name'] = $attributes['name'];
                $frame['absRef'] = $this->absRef($frame['src']);
                $info[] = $frame;
            }
            return $info;
        }
    }


    /**
     * This function substitutes the media-references in $this->theParts["html"]["content"]
     *
     * @param   boolean     $absolute: If true, then the refs are substituted with http:// ref's indstead of Content-ID's (cid).
     * @return  void
     */
    public function substMediaNamesInHTML($absolute) {
        if (is_array($this->theParts['html']['media'])) {
            foreach ($this->theParts['html']['media'] as $key => $val) {
                if ($val['use_jumpurl'] && $this->jumperURL_prefix) {
                    $subst = $this->jumperURL_prefix . t3lib_div::rawUrlEncodeFP($val['absRef']);
                } else {
                    $subst = ($absolute) ? $val['absRef'] : 'cid:part' . $key . '.' . $this->messageid;
                }
                $this->theParts['html']['content'] = str_replace(
                    $val['subst_str'],
                    $val['quotes'] . $subst . $val['quotes'],
                    $this->theParts['html']['content']);
            }
        }
        if (!$absolute) {
            $this->fixRollOvers();
        }
    }


    /**
     * This function substitutes the hrefs in $this->theParts["html"]["content"]
     *
     * @return  void
     */
    public function substHREFsInHTML() {
        if (!is_array($this->theParts['html']['hrefs'])) {
            return;
        }
        foreach ($this->theParts['html']['hrefs'] as $key => $val) {
                // Form elements cannot use jumpurl!
            if ($this->jumperURL_prefix && $val['tag'] != 'form') {
                if ($this->jumperURL_useId) {
                    $substVal = $this->jumperURL_prefix . $key;
                } else {
                    $substVal = $this->jumperURL_prefix . t3lib_div::rawUrlEncodeFP($val['absRef']);
                }
            } else {
                $substVal = $val['absRef'];
            }
            $this->theParts['html']['content'] = str_replace(
                $val['subst_str'],
                $val['quotes'] . $substVal . $val['quotes'],
                $this->theParts['html']['content']);
        }
    }


    /**
     *  This substitutes the http:// urls in plain text with links
     *
     * @param   string      $content: the content to use to substitute
     * @return  string      the changed content
     */
    public function substHTTPurlsInPlainText($content) {
        if (!$this->jumperURL_prefix) {
            return $content;
        }

        $textpieces = explode("http://", $content);
        $pieces = count($textpieces);
        $textstr = $textpieces[0];
        for ($i = 1; $i < $pieces; $i++) {
            $len = strcspn($textpieces[$i], chr(32) . TAB . CRLF);
            if (trim(substr($textstr, -1)) == '' && $len) {
                $lastChar = substr($textpieces[$i], $len - 1, 1);
                if (!preg_match('/[A-Za-z0-9\/#]/', $lastChar)) {
                    $len--;
                }

                $parts = array();
                $parts[0] = "http://" . substr($textpieces[$i], 0, $len);
                $parts[1] = substr($textpieces[$i], $len);

                if ($this->jumperURL_useId) {
                    $this->theParts['plain']['link_ids'][$i] = $parts[0];
                    $parts[0] = $this->jumperURL_prefix . '-' . $i;
                } else {
                    $parts[0] = $this->jumperURL_prefix . t3lib_div::rawUrlEncodeFP($parts[0]);
                }
                $textstr .= $parts[0] . $parts[1];
            } else {
                $textstr .= 'http://' . $textpieces[$i];
            }
        }
        return $textstr;
    }


    /**
     * JavaScript rollOvers cannot support graphics inside of mail.
     * If these exists we must let them refer to the absolute url. By the way:
     * Roll-overs seems to work only on some mail-readers and so far I've seen it
     * work on Netscape 4 message-center (but not 4.5!!)
     *
     * @return  void
     */
    public function fixRollOvers() {
        $newContent = '';
        $items = explode('.src', $this->theParts['html']['content']);
        if (count($items) <= 1) {
            return;
        }

        foreach ($items as $key => $part) {
            $sub = substr($part, 0, 200);
            if (preg_match('/cid:part[^ "\']*/', $sub, $reg)) {
                    // The position of the string
                $thePos = strpos($part, $reg[0]);
                    // Finds the id of the media...
                preg_match('/cid:part([^\.]*).*/', $sub, $reg2);
                $theSubStr = $this->theParts['html']['media'][intval($reg2[1])]['absRef'];
                if ($thePos && $theSubStr) {
                        // ... and substitutes the javaScript rollover image with this instead
                        // If the path is NOT and url, the reference is set to nothing
                    if (!strpos(' ' . $theSubStr, 'http://')) {
                        $theSubStr = 'http://';
                    }
                    $part = substr($part, 0, $thePos) . $theSubStr . substr($part, $thePos + strlen($reg[0]), strlen($part));
                }
            }
            $newContent .= $part . ((($key + 1) != count($items)) ? '.src' : '');
        }
        $this->theParts['html']['content'] = $newContent;
    }


    /*******************************************
     *
     * File and URL-functions
     *
     *******************************************/

    /**
     * Returns base64-encoded content, which is broken every 76 character
     *
     * @param   string      $inputstr: the string to encode
     * @return  string      the encoded string
     */
    public function makeBase64($inputstr) {
        return chunk_split(base64_encode($inputstr));
    }


    /**
     * reads the URL or file and determines the Content-type by either guessing or opening a connection to the host
     *
     * @param   string      $url: the URL to get information of
     * @return  mixed       either false or the array with information
     */
    public function getExtendedURL($url) {
        $res = array();
        $res['content'] = $this->getURL($url);
        if (!$res['content']) {
            return FALSE;
        }
        $pathInfo = parse_url($url);
        $fileInfo = $this->split_fileref($pathInfo['path']);
        switch ($fileInfo['fileext']) {
            case 'gif':
            case 'png':
                $res['content_type'] = 'image/' . $fileInfo['fileext'];
                break;
            case 'jpg':
            case 'jpeg':
                $res['content_type'] = 'image/jpeg';
                break;
            case 'html':
            case 'htm':
                $res['content_type'] = 'text/html';
                break;
            case 'css':
                $res['content_type'] = 'text/css';
                break;
            case 'swf':
                $res['content_type'] = 'application/x-shockwave-flash';
                break;
            default:
                $res['content_type'] = $this->getMimeType($url);
        }
        return $res;
    }


    /**
     * Adds HTTP user and password (from $this->http_username) to a URL
     *
     * @param   string      $url: the URL
     * @return  string      the URL with the added values
     */
    public function addUserPass($url) {
        $user = $this->http_username;
        $pass = $this->http_password;
        $matches = array();
        if ($user && $pass && preg_match('/^(https?:\/\/)/', $url, $matches)) {
            return $matches[1] . $user . ':' . $pass . '@' . substr($url, strlen($matches[1]));
        }
        return $url;
    }


    /**
     * reads a url or file
     *
     * @param   string      $url: the URL to fetch
     * @return  string      the content of the URL
     */
    public function getURL($url) {
        $url = $this->addUserPass($url);
        return t3lib_div::getURL($url);
    }


    /**
     * reads a url or file and strips the HTML-tags AND removes all
     * empty lines. This is used to read plain-text out of a HTML-page
     *
     * @param   string      $url: the URL to load
     * @return  the content
     */
    public function getStrippedURL($url) {
        $content = '';
        if ($fd = fopen($url, "rb")) {
            while (!feof($fd)) {
                $line = fgetss($fd, 5000);
                if (trim($line)) {
                    $content .= trim($line) . LF;
                }
            }
            fclose($fd);
        }
        return $content;
    }


    /**
     * This function returns the mime type of the file specified by the url
     *
     * @param   string      $url: the url
     * @return  string      $mimeType: the mime type found in the header
     */
    public function getMimeType($url) {
        $mimeType = '';
        $headers = trim(t3lib_div::getURL($url, 2));
        if ($headers) {
            $matches = array();
            if (preg_match('/(Content-Type:[\s]*)([a-zA-Z_0-9\/\-\.\+]*)([\s]|$)/', $headers, $matches)) {
                $mimeType = trim($matches[2]);
            }
        }
        return $mimeType;
    }


    /**
     * Returns the absolute address of a link. This is based on
     * $this->theParts["html"]["path"] being the root-address
     *
     * @param   string      $ref: address to use
     * @return  string      the absolute address
     */
    public function absRef($ref) {
        $ref = trim($ref);
        $info = parse_url($ref);
        if ($info['scheme']) {
            return $ref;
        } elseif (preg_match('/^\//', $ref)) {
            $addr = parse_url($this->theParts['html']['path']);
            return $addr['scheme'] . '://' . $addr['host'] . ($addr['port'] ? ':' . $addr['port'] : '') . $ref;
        } else {
                // If the reference is relative, the path is added, in order for us to fetch the content
            return $this->theParts['html']['path'] . $ref;
        }
    }


    /**
     * Returns information about a file reference
     *
     * @param   string      $fileref: the file to use
     * @return  array       path, filename, filebody, fileext
     */
    public function split_fileref($fileref) {
        $info = array();
        if (preg_match('/(.*\/)(.*)$/', $fileref, $reg)) {
            $info['path'] = $reg[1];
            $info['file'] = $reg[2];
        } else {
            $info['path'] = '';
            $info['file'] = $fileref;
        }
        $reg = '';
        if (preg_match('/(.*)\.([^\.]*$)/', $info['file'], $reg)) {
            $info['filebody'] = $reg[1];
            $info['fileext'] = strtolower($reg[2]);
            $info['realFileext'] = $reg[2];
        } else {
            $info['filebody'] = $info['file'];
            $info['fileext'] = '';
        }
        return $info;
    }


    /**
     * Returns an array with file or url-information
     *
     * @param   string      $path: url to check
     * @return  array       information about the path / URL
     */
    public function extParseUrl($path) {
        $res = parse_url($path);
        preg_match('/(.*\/)([^\/]*)$/', $res['path'], $reg);
        $res['filepath'] = $reg[1];
        $res['filename'] = $reg[2];
        return $res;
    }


    /**
     * Creates a regular expression out of a list of tags
     *
     * @param   mixed       $tagArray: the list of tags (either as array or string if it is one tag)
     * @return  string      the regular expression
     */
    public function tag_regex($tags) {
        $tags = (!is_array($tags) ? array($tags) : $tags);
        $regexp = '/';
        $c = count($tags);
        foreach ($tags as $tag) {
            $c--;
            $regexp .= '<' . $tag . '[[:space:]]' . (($c) ? '|' : '');
        }
        return $regexp . '/i';
    }


    /**
     * This function analyzes a HTML tag
     * If an attribute is empty (like OPTION) the value of that key is just empty. Check it with is_set();
     *
     * @param   string      $tag: is either like this "<TAG OPTION ATTRIB=VALUE>" or
     *               this " OPTION ATTRIB=VALUE>" which means you can omit the tag-name
     * @return  array       array with attributes as keys in lower-case
     */
    public function get_tag_attributes($tag) {
        $attributes = array();
        $tag = ltrim(preg_replace('/^<[^ ]*/', '', trim($tag)));
        $tagLen = strlen($tag);
        $safetyCounter = 100;
            // Find attribute
        while ($tag) {
            $value = '';
            $reg = preg_split('/[[:space:]=>]/', $tag, 2);
            $attrib = $reg[0];

            $tag = ltrim(substr($tag, strlen($attrib), $tagLen));
            if (substr($tag, 0, 1) == '=') {
                $tag = ltrim(substr($tag, 1, $tagLen));
                if (substr($tag, 0, 1) == '"') {
                        // Quotes around the value
                    $reg = explode('"', substr($tag, 1, $tagLen), 2);
                    $tag = ltrim($reg[1]);
                    $value = $reg[0];
                } else {
                        // No quotes around value
                    preg_match('/^([^[:space:]>]*)(.*)/', $tag, $reg);
                    $value = trim($reg[1]);
                    $tag = ltrim($reg[2]);
                    if (substr($tag, 0, 1) == '>') {
                        $tag = '';
                    }
                }
            }
            $attributes[strtolower($attrib)] = $value;
            $safetyCounter--;
            if ($safetyCounter < 0) {
                break;
            }
        }
        return $attributes;
    }
}

if (defined('TYPO3_MODE') && isset($GLOBALS['TYPO3_CONF_VARS'][TYPO3_MODE]['XCLASS']['t3lib/class.t3lib_htmlmail.php'])) {
    include_once($GLOBALS['TYPO3_CONF_VARS'][TYPO3_MODE]['XCLASS']['t3lib/class.t3lib_htmlmail.php']);
}

?>