C:/xampp/htdocs/moodle/lib/webdavlib.php

Go to the documentation of this file.

<?php

// This file is part of Moodle - http://moodle.org/
//
// Moodle 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 3 of the License, or
// (at your option) any later version.
//
// Moodle 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.
//
// You should have received a copy of the GNU General Public License
// along with Moodle.  If not, see <http://www.gnu.org/licenses/>.

class webdav_client {

    private $_debug = false;
    private $sock;
    private $_server;
    private $_protocol = 'HTTP/1.1';
    private $_port = 80;
    private $_path ='/';
    private $_auth = false;
    private $_user;
    private $_pass;

    private $_socket_timeout = 5;
    private $_errno;
    private $_errstr;
    private $_user_agent = 'Moodle WebDav Client';
    private $_crlf = "\r\n";
    private $_req;
    private $_resp_status;
    private $_parser;
    private $_xmltree;
    private $_tree;
    private $_ls = array();
    private $_ls_ref;
    private $_ls_ref_cdata;
    private $_delete = array();
    private $_delete_ref;
    private $_delete_ref_cdata;
    private $_lock = array();
    private $_lock_ref;
    private $_lock_rec_cdata;
    private $_null = NULL;
    private $_header='';
    private $_body='';
    private $_connection_closed = false;
    private $_maxheaderlenth = 1000;

    function __construct($server = '', $user = '', $pass = '', $auth = false) {
        if (!empty($server)) {
            $this->_server = $server;
        }
        if (!empty($user) && !empty($pass)) {
            $this->user = $user;
            $this->pass = $pass;
        }
        $this->_auth = $auth;
    }
    public function __set($key, $value) {
        $property = '_' . $key;
        $this->$property = $value;
    }

    function set_protocol($version) {
        if ($version == 1) {
            $this->_protocol = 'HTTP/1.1';
        } else {
            $this->_protocol = 'HTTP/1.0';
        }
    }

    function iso8601totime($iso8601) {
        /*

         date-time       = full-date "T" full-time

         full-date       = date-fullyear "-" date-month "-" date-mday
         full-time       = partial-time time-offset

         date-fullyear   = 4DIGIT
         date-month      = 2DIGIT  ; 01-12
         date-mday       = 2DIGIT  ; 01-28, 01-29, 01-30, 01-31 based on
         month/year
         time-hour       = 2DIGIT  ; 00-23
         time-minute     = 2DIGIT  ; 00-59
         time-second     = 2DIGIT  ; 00-59, 00-60 based on leap second rules
         time-secfrac    = "." 1*DIGIT
         time-numoffset  = ("+" / "-") time-hour ":" time-minute
         time-offset     = "Z" / time-numoffset

         partial-time    = time-hour ":" time-minute ":" time-second
                                            [time-secfrac]
         */

        $regs = array();
        /*         [1]        [2]        [3]        [4]        [5]        [6]  */
        if (preg_match('/^([0-9]{4})-([0-9]{2})-([0-9]{2})T([0-9]{2}):([0-9]{2}):([0-9]{2})Z$/', $iso8601, $regs)) {
            return mktime($regs[4],$regs[5], $regs[6], $regs[2], $regs[3], $regs[1]);
        }
        // to be done: regex for partial-time...apache webdav mod never returns partial-time

        return false;
    }

    function open() {
        // let's try to open a socket
        $this->_error_log('open a socket connection');
        $this->sock = fsockopen($this->_server, $this->_port, $this->_errno, $this->_errstr, $this->_socket_timeout);
        set_time_limit(30);
        if (is_resource($this->sock)) {
            socket_set_blocking($this->sock, true);
            $this->_connection_closed = false;
            $this->_error_log('socket is open: ' . $this->sock);
            return true;
        } else {
            $this->_error_log("$this->_errstr ($this->_errno)\n");
            return false;
        }
    }

    function close() {
        $this->_error_log('closing socket ' . $this->sock);
        $this->_connection_closed = true;
        fclose($this->sock);
    }

    function check_webdav() {
        $resp = $this->options();
        if (!$resp) {
            return false;
        }
        $this->_error_log($resp['header']['DAV']);
        // check schema
        if (preg_match('/1,2/', $resp['header']['DAV'])) {
            return true;
        }
        // otherwise return false
        return false;
    }


    function options() {
        $this->header_unset();
        $this->create_basic_request('OPTIONS');
        $this->send_request();
        $this->get_respond();
        $response = $this->process_respond();
        // validate the response ...
        // check http-version
        if ($response['status']['http-version'] == 'HTTP/1.1' ||
            $response['status']['http-version'] == 'HTTP/1.0') {
                return $response;
            }
        $this->_error_log('Response was not even http');
        return false;

    }

    function mkcol($path) {
        $this->_path = $this->translate_uri($path);
        $this->header_unset();
        $this->create_basic_request('MKCOL');
        $this->send_request();
        $this->get_respond();
        $response = $this->process_respond();
        // validate the response ...
        // check http-version
        $http_version = $response['status']['http-version'];
        if ($http_version == 'HTTP/1.1' || $http_version == 'HTTP/1.0') {
            return $response['status']['status-code'];
        }

    }

    function get($path, &$buffer) {
        $this->_path = $this->translate_uri($path);
        $this->header_unset();
        $this->create_basic_request('GET');
        $this->send_request();
        $this->get_respond();
        $response = $this->process_respond();

        $http_version = $response['status']['http-version'];
        // validate the response
        // check http-version
        if ($http_version == 'HTTP/1.1' || $http_version == 'HTTP/1.0') {
                // seems to be http ... proceed
                // We expect a 200 code
                if ($response['status']['status-code'] == 200 ) {
                    $this->_error_log('returning buffer with ' . strlen($response['body']) . ' bytes.');
                    $buffer = $response['body'];
                }
                return $response['status']['status-code'];
            }
        // ups: no http status was returned ?
        return false;
    }

    function put($path, $data ) {
        $this->_path = $this->translate_uri($path);
        $this->header_unset();
        $this->create_basic_request('PUT');
        // add more needed header information ...
        $this->header_add('Content-length: ' . strlen($data));
        $this->header_add('Content-type: application/octet-stream');
        // send header
        $this->send_request();
        // send the rest (data)
        fputs($this->sock, $data);
        $this->get_respond();
        $response = $this->process_respond();

        // validate the response
        // check http-version
        if ($response['status']['http-version'] == 'HTTP/1.1' ||
            $response['status']['http-version'] == 'HTTP/1.0') {
                // seems to be http ... proceed
                // We expect a 200 or 204 status code
                // see rfc 2068 - 9.6 PUT...
                // print 'http ok<br>';
                return $response['status']['status-code'];
            }
        // ups: no http status was returned ?
        return false;
    }

    function put_file($path, $filename) {
        // try to open the file ...


        $handle = @fopen ($filename, 'r');

        if ($handle) {
            // $this->sock = pfsockopen ($this->_server, $this->_port, $this->_errno, $this->_errstr, $this->_socket_timeout);
            $this->_path = $this->translate_uri($path);
            $this->header_unset();
            $this->create_basic_request('PUT');
            // add more needed header information ...
            $this->header_add('Content-length: ' . filesize($filename));
            $this->header_add('Content-type: application/octet-stream');
            // send header
            $this->send_request();
            while (!feof($handle)) {
                fputs($this->sock,fgets($handle,4096));
            }
            fclose($handle);
            $this->get_respond();
            $response = $this->process_respond();

            // validate the response
            // check http-version
            if ($response['status']['http-version'] == 'HTTP/1.1' ||
                $response['status']['http-version'] == 'HTTP/1.0') {
                    // seems to be http ... proceed
                    // We expect a 200 or 204 status code
                    // see rfc 2068 - 9.6 PUT...
                    // print 'http ok<br>';
                    return $response['status']['status-code'];
                }
            // ups: no http status was returned ?
            return false;
        } else {
            $this->_error_log('put_file: could not open ' . $filename);
            return false;
        }

    }

    function get_file($srcpath, $localpath) {

        if ($this->get($srcpath, $buffer)) {
            // convert utf-8 filename to iso-8859-1

            $localpath = $this->utf_decode_path($localpath);

            $handle = fopen ($localpath, 'w');
            if ($handle) {
                fwrite($handle, $buffer);
                fclose($handle);
                return true;
            } else {
                return false;
            }
        } else {
            return false;
        }
    }

    function copy_file($src_path, $dst_path, $overwrite) {
        $this->_path = $this->translate_uri($src_path);
        $this->header_unset();
        $this->create_basic_request('COPY');
        $this->header_add(sprintf('Destination: http://%s%s', $this->_server, $this->translate_uri($dst_path)));
        if ($overwrite) {
            $this->header_add('Overwrite: T');
        } else {
            $this->header_add('Overwrite: F');
        }
        $this->header_add('');
        $this->send_request();
        $this->get_respond();
        $response = $this->process_respond();
        // validate the response ...
        // check http-version
        if ($response['status']['http-version'] == 'HTTP/1.1' ||
            $response['status']['http-version'] == 'HTTP/1.0') {
         /* seems to be http ... proceed
             just return what server gave us (as defined in rfc 2518) :
             201 (Created) - The source resource was successfully copied. The copy operation resulted in the creation of a new resource.
             204 (No Content) - The source resource was successfully copied to a pre-existing destination resource.
             403 (Forbidden) - The source and destination URIs are the same.
             409 (Conflict) - A resource cannot be created at the destination until one or more intermediate collections have been created.
             412 (Precondition Failed) - The server was unable to maintain the liveness of the properties listed in the propertybehavior XML element
                     or the Overwrite header is "F" and the state of the destination resource is non-null.
             423 (Locked) - The destination resource was locked.
             502 (Bad Gateway) - This may occur when the destination is on another server and the destination server refuses to accept the resource.
             507 (Insufficient Storage) - The destination resource does not have sufficient space to record the state of the resource after the
                     execution of this method.
          */
                return $response['status']['status-code'];
            }
        return false;
    }

    function copy_coll($src_path, $dst_path, $overwrite) {
        $this->_path = $this->translate_uri($src_path);
        $this->header_unset();
        $this->create_basic_request('COPY');
        $this->header_add(sprintf('Destination: http://%s%s', $this->_server, $this->translate_uri($dst_path)));
        $this->header_add('Depth: Infinity');

        $xml  = "<?xml version=\"1.0\" encoding=\"utf-8\" ?>\r\n";
        $xml .= "<d:propertybehavior xmlns:d=\"DAV:\">\r\n";
        $xml .= "  <d:keepalive>*</d:keepalive>\r\n";
        $xml .= "</d:propertybehavior>\r\n";

        $this->header_add('Content-length: ' . strlen($xml));
        $this->header_add('Content-type: application/xml');
        $this->send_request();
        // send also xml
        fputs($this->sock, $xml);
        $this->get_respond();
        $response = $this->process_respond();
        // validate the response ...
        // check http-version
        if ($response['status']['http-version'] == 'HTTP/1.1' ||
            $response['status']['http-version'] == 'HTTP/1.0') {
         /* seems to be http ... proceed
             just return what server gave us (as defined in rfc 2518) :
             201 (Created) - The source resource was successfully copied. The copy operation resulted in the creation of a new resource.
             204 (No Content) - The source resource was successfully copied to a pre-existing destination resource.
             403 (Forbidden) - The source and destination URIs are the same.
             409 (Conflict) - A resource cannot be created at the destination until one or more intermediate collections have been created.
             412 (Precondition Failed) - The server was unable to maintain the liveness of the properties listed in the propertybehavior XML element
                     or the Overwrite header is "F" and the state of the destination resource is non-null.
             423 (Locked) - The destination resource was locked.
             502 (Bad Gateway) - This may occur when the destination is on another server and the destination server refuses to accept the resource.
             507 (Insufficient Storage) - The destination resource does not have sufficient space to record the state of the resource after the
                     execution of this method.
          */
                return $response['status']['status-code'];
            }
        return false;
    }

    // --------------------------------------------------------------------------
    // public method move
    // move/rename a file/collection on webdav server
    function move($src_path,$dst_path, $overwrite) {

        $this->_path = $this->translate_uri($src_path);
        $this->header_unset();

        $this->create_basic_request('MOVE');
        $this->header_add(sprintf('Destination: http://%s%s', $this->_server, $this->translate_uri($dst_path)));
        if ($overwrite) {
            $this->header_add('Overwrite: T');
        } else {
            $this->header_add('Overwrite: F');
        }
        $this->header_add('');

        $this->send_request();
        $this->get_respond();
        $response = $this->process_respond();
        // validate the response ...
        // check http-version
        if ($response['status']['http-version'] == 'HTTP/1.1' ||
            $response['status']['http-version'] == 'HTTP/1.0') {
            /* seems to be http ... proceed
                just return what server gave us (as defined in rfc 2518) :
                201 (Created) - The source resource was successfully moved, and a new resource was created at the destination.
                204 (No Content) - The source resource was successfully moved to a pre-existing destination resource.
                403 (Forbidden) - The source and destination URIs are the same.
                409 (Conflict) - A resource cannot be created at the destination until one or more intermediate collections have been created.
                412 (Precondition Failed) - The server was unable to maintain the liveness of the properties listed in the propertybehavior XML element
                         or the Overwrite header is "F" and the state of the destination resource is non-null.
                423 (Locked) - The source or the destination resource was locked.
                502 (Bad Gateway) - This may occur when the destination is on another server and the destination server refuses to accept the resource.

                201 (Created) - The collection or structured resource was created in its entirety.
                403 (Forbidden) - This indicates at least one of two conditions: 1) the server does not allow the creation of collections at the given
                                                 location in its namespace, or 2) the parent collection of the Request-URI exists but cannot accept members.
                405 (Method Not Allowed) - MKCOL can only be executed on a deleted/non-existent resource.
                409 (Conflict) - A collection cannot be made at the Request-URI until one or more intermediate collections have been created.
                415 (Unsupported Media Type)- The server does not support the request type of the body.
                507 (Insufficient Storage) - The resource does not have sufficient space to record the state of the resource after the execution of this method.
             */
                return $response['status']['status-code'];
            }
        return false;
    }

    function lock($path) {
        $this->_path = $this->translate_uri($path);
        $this->header_unset();
        $this->create_basic_request('LOCK');
        $this->header_add('Timeout: Infinite');
        $this->header_add('Content-type: text/xml');
        // create the xml request ...
        $xml =  "<?xml version=\"1.0\" encoding=\"utf-8\" ?>\r\n";
        $xml .= "<D:lockinfo xmlns:D='DAV:'\r\n>";
        $xml .= "  <D:lockscope><D:exclusive/></D:lockscope>\r\n";
        $xml .= "  <D:locktype><D:write/></D:locktype>\r\n";
        $xml .= "  <D:owner>\r\n";
        $xml .= "    <D:href>".($this->_user)."</D:href>\r\n";
        $xml .= "  </D:owner>\r\n";
        $xml .= "</D:lockinfo>\r\n";
        $this->header_add('Content-length: ' . strlen($xml));
        $this->send_request();
        // send also xml
        fputs($this->sock, $xml);
        $this->get_respond();
        $response = $this->process_respond();
        // validate the response ... (only basic validation)
        // check http-version
        if ($response['status']['http-version'] == 'HTTP/1.1' ||
            $response['status']['http-version'] == 'HTTP/1.0') {
            /* seems to be http ... proceed
            rfc 2518 says:
            200 (OK) - The lock request succeeded and the value of the lockdiscovery property is included in the body.
            412 (Precondition Failed) - The included lock token was not enforceable on this resource or the server could not satisfy the
                     request in the lockinfo XML element.
            423 (Locked) - The resource is locked, so the method has been rejected.
             */

                switch($response['status']['status-code']) {
                case 200:
                    // collection was successfully locked... see xml response to get lock token...
                    if (strcmp($response['header']['Content-Type'], 'text/xml; charset="utf-8"') == 0) {
                        // ok let's get the content of the xml stuff
                        $this->_parser = xml_parser_create_ns();
                        // forget old data...
                        unset($this->_lock[$this->_parser]);
                        unset($this->_xmltree[$this->_parser]);
                        xml_parser_set_option($this->_parser,XML_OPTION_SKIP_WHITE,0);
                        xml_parser_set_option($this->_parser,XML_OPTION_CASE_FOLDING,0);
                        xml_set_object($this->_parser, $this);
                        xml_set_element_handler($this->_parser, "_lock_startElement", "_endElement");
                        xml_set_character_data_handler($this->_parser, "_lock_cdata");

                        if (!xml_parse($this->_parser, $response['body'])) {
                            die(sprintf("XML error: %s at line %d",
                                xml_error_string(xml_get_error_code($this->_parser)),
                                xml_get_current_line_number($this->_parser)));
                        }

                        // Free resources
                        xml_parser_free($this->_parser);
                        // add status code to array
                        $this->_lock[$this->_parser]['status'] = 200;
                        return $this->_lock[$this->_parser];

                    } else {
                        print 'Missing Content-Type: text/xml header in response.<br>';
                    }
                    return false;

                default:
                    // hmm. not what we expected. Just return what we got from webdav server
                    // someone else has to handle it.
                    $this->_lock['status'] = $response['status']['status-code'];
                    return $this->_lock;
                }
            }


    }


    function unlock($path, $locktoken) {
        $this->_path = $this->translate_uri($path);
        $this->header_unset();
        $this->create_basic_request('UNLOCK');
        $this->header_add(sprintf('Lock-Token: <%s>', $locktoken));
        $this->send_request();
        $this->get_respond();
        $response = $this->process_respond();
        if ($response['status']['http-version'] == 'HTTP/1.1' ||
            $response['status']['http-version'] == 'HTTP/1.0') {
            /* seems to be http ... proceed
            rfc 2518 says:
            204 (OK) - The 204 (No Content) status code is used instead of 200 (OK) because there is no response entity body.
             */
                return $response['status']['status-code'];
            }
        return false;
    }

    function delete($path) {
        $this->_path = $this->translate_uri($path);
        $this->header_unset();
        $this->create_basic_request('DELETE');
        /* $this->header_add('Content-Length: 0'); */
        $this->header_add('');
        $this->send_request();
        $this->get_respond();
        $response = $this->process_respond();

        // validate the response ...
        // check http-version
        if ($response['status']['http-version'] == 'HTTP/1.1' ||
            $response['status']['http-version'] == 'HTTP/1.0') {
                // seems to be http ... proceed
                // We expect a 207 Multi-Status status code
                // print 'http ok<br>';

                switch ($response['status']['status-code']) {
                case 207:
                    // collection was NOT deleted... see xml response for reason...
                    // next there should be a Content-Type: text/xml; charset="utf-8" header line
                    if (strcmp($response['header']['Content-Type'], 'text/xml; charset="utf-8"') == 0) {
                        // ok let's get the content of the xml stuff
                        $this->_parser = xml_parser_create_ns();
                        // forget old data...
                        unset($this->_delete[$this->_parser]);
                        unset($this->_xmltree[$this->_parser]);
                        xml_parser_set_option($this->_parser,XML_OPTION_SKIP_WHITE,0);
                        xml_parser_set_option($this->_parser,XML_OPTION_CASE_FOLDING,0);
                        xml_set_object($this->_parser, $this);
                        xml_set_element_handler($this->_parser, "_delete_startElement", "_endElement");
                        xml_set_character_data_handler($this->_parser, "_delete_cdata");

                        if (!xml_parse($this->_parser, $response['body'])) {
                            die(sprintf("XML error: %s at line %d",
                                xml_error_string(xml_get_error_code($this->_parser)),
                                xml_get_current_line_number($this->_parser)));
                        }

                        print "<br>";

                        // Free resources
                        xml_parser_free($this->_parser);
                        $this->_delete[$this->_parser]['status'] = $response['status']['status-code'];
                        return $this->_delete[$this->_parser];

                    } else {
                        print 'Missing Content-Type: text/xml header in response.<br>';
                    }
                    return false;

                default:
                    // collection or file was successfully deleted
                    $this->_delete['status'] = $response['status']['status-code'];
                    return $this->_delete;


                }
            }

    }

    function ls($path) {

        if (trim($path) == '') {
            $this->_error_log('Missing a path in method ls');
            return false;
        }
        $this->_path = $this->translate_uri($path);

        $this->header_unset();
        $this->create_basic_request('PROPFIND');
        $this->header_add('Depth: 1');
        $this->header_add('Content-type: application/xml');
        // create profind xml request...
        $xml  = <<<EOD
<?xml version="1.0" encoding="utf-8"?>
<propfind xmlns="DAV:"><prop>
<getcontentlength xmlns="DAV:"/>
<getlastmodified xmlns="DAV:"/>
<executable xmlns="http://apache.org/dav/props/"/>
<resourcetype xmlns="DAV:"/>
<checked-in xmlns="DAV:"/>
<checked-out xmlns="DAV:"/>
</prop></propfind>
EOD;
        $this->header_add('Content-length: ' . strlen($xml));
        $this->send_request();
        $this->_error_log($xml);
        fputs($this->sock, $xml);
        $this->get_respond();
        $response = $this->process_respond();
        // validate the response ... (only basic validation)
        // check http-version
        if ($response['status']['http-version'] == 'HTTP/1.1' ||
            $response['status']['http-version'] == 'HTTP/1.0') {
                // seems to be http ... proceed
                // We expect a 207 Multi-Status status code
                // print 'http ok<br>';
                if (strcmp($response['status']['status-code'],'207') == 0 ) {
                    // ok so far
                    // next there should be a Content-Type: text/xml; charset="utf-8" header line
                    if (preg_match('#(application|text)/xml;\s?charset=[\'\"]?utf-8[\'\"]?#i', $response['header']['Content-Type'])) {
                        // ok let's get the content of the xml stuff
                        $this->_parser = xml_parser_create_ns('UTF-8');
                        // forget old data...
                        unset($this->_ls[$this->_parser]);
                        unset($this->_xmltree[$this->_parser]);
                        xml_parser_set_option($this->_parser,XML_OPTION_SKIP_WHITE,0);
                        xml_parser_set_option($this->_parser,XML_OPTION_CASE_FOLDING,0);
                        // xml_parser_set_option($this->_parser,XML_OPTION_TARGET_ENCODING,'UTF-8');
                        xml_set_object($this->_parser, $this);
                        xml_set_element_handler($this->_parser, "_propfind_startElement", "_endElement");
                        xml_set_character_data_handler($this->_parser, "_propfind_cdata");


                        if (!xml_parse($this->_parser, $response['body'])) {
                            die(sprintf("XML error: %s at line %d",
                                xml_error_string(xml_get_error_code($this->_parser)),
                                xml_get_current_line_number($this->_parser)));
                        }

                        // Free resources
                        xml_parser_free($this->_parser);
                        $arr = $this->_ls[$this->_parser];
                        return $arr;
                    } else {
                        $this->_error_log('Missing Content-Type: text/xml header in response!!');
                        return false;
                    }
                } else {
                    // return status code ...
                    return $response['status']['status-code'];
                }
            }

        // response was not http
        $this->_error_log('Ups in method ls: error in response from server');
        return false;
    }


    function gpi($path) {

        // split path by last "/"
        $path = rtrim($path, "/");
        $item = basename($path);
        $dir  = dirname($path);

        $list = $this->ls($dir);

        // be sure it is an array
        if (is_array($list)) {
            foreach($list as $e) {

                $fullpath = urldecode($e['href']);
                $filename = basename($fullpath);

                if ($filename == $item && $filename != "" and $fullpath != $dir."/") {
                    return $e;
                }
            }
        }
        return false;
    }

    function is_file($path) {

        $item = $this->gpi($path);

        if ($item === false) {
            return false;
        } else {
            return ($item['resourcetype'] != 'collection');
        }
    }

    function is_dir($path) {

        // be sure path is utf-8
        $item = $this->gpi($path);

        if ($item === false) {
            return false;
        } else {
            return ($item['resourcetype'] == 'collection');
        }
    }


    function mput($filelist) {

        $result = true;

        while (list($localpath, $destpath) = each($filelist)) {

            $localpath = rtrim($localpath, "/");
            $destpath  = rtrim($destpath, "/");

            // attempt to create target path
            if (is_dir($localpath)) {
                $pathparts = explode("/", $destpath."/ "); // add one level, last level will be created as dir
            } else {
                $pathparts = explode("/", $destpath);
            }
            $checkpath = "";
            for ($i=1; $i<sizeof($pathparts)-1; $i++) {
                $checkpath .= "/" . $pathparts[$i];
                if (!($this->is_dir($checkpath))) {

                    $result &= ($this->mkcol($checkpath) == 201 );
                }
            }

            if ($result) {
                // recurse directories
                if (is_dir($localpath)) {
                    $dp = opendir($localpath);
                    $fl = array();
                    while($filename = readdir($dp)) {
                        if ((is_file($localpath."/".$filename) || is_dir($localpath."/".$filename)) && $filename!="." && $filename != "..") {
                            $fl[$localpath."/".$filename] = $destpath."/".$filename;
                        }
                    }
                    $result &= $this->mput($fl);
                } else {
                    $result &= ($this->put_file($destpath, $localpath) == 201);
                }
            }
        }
        return $result;
    }

    function mget($filelist) {

        $result = true;

        while (list($remotepath, $localpath) = each($filelist)) {

            $localpath   = rtrim($localpath, "/");
            $remotepath  = rtrim($remotepath, "/");

            // attempt to create local path
            if ($this->is_dir($remotepath)) {
                $pathparts = explode("/", $localpath."/ "); // add one level, last level will be created as dir
            } else {
                $pathparts = explode("/", $localpath);
            }
            $checkpath = "";
            for ($i=1; $i<sizeof($pathparts)-1; $i++) {
                $checkpath .= "/" . $pathparts[$i];
                if (!is_dir($checkpath)) {

                    $result &= mkdir($checkpath);
                }
            }

            if ($result) {
                // recurse directories
                if ($this->is_dir($remotepath)) {
                    $list = $this->ls($remotepath);

                    $fl = array();
                    foreach($list as $e) {
                        $fullpath = urldecode($e['href']);
                        $filename = basename($fullpath);
                        if ($filename != '' and $fullpath != $remotepath . '/') {
                            $fl[$remotepath."/".$filename] = $localpath."/".$filename;
                        }
                    }
                    $result &= $this->mget($fl);
                } else {
                    $result &= ($this->get_file($remotepath, $localpath));
                }
            }
        }
        return $result;
    }

    // --------------------------------------------------------------------------
    // private xml callback and helper functions starting here
    // --------------------------------------------------------------------------


    private function _endElement($parser, $name) {
        // end tag was found...
        $this->_xmltree[$parser] = substr($this->_xmltree[$parser],0, strlen($this->_xmltree[$parser]) - (strlen($name) + 1));
    }

    private function _propfind_startElement($parser, $name, $attrs) {
        // lower XML Names... maybe break a RFC, don't know ...

        $propname = strtolower($name);
        if (!empty($this->_xmltree[$parser])) {
            $this->_xmltree[$parser] .= $propname . '_';
        } else {
            $this->_xmltree[$parser] = $propname . '_';
        }

        // translate xml tree to a flat array ...
        switch($this->_xmltree[$parser]) {
        case 'dav::multistatus_dav::response_':
            // new element in mu
            $this->_ls_ref =& $this->_ls[$parser][];
            break;
        case 'dav::multistatus_dav::response_dav::href_':
            $this->_ls_ref_cdata = &$this->_ls_ref['href'];
            break;
        case 'dav::multistatus_dav::response_dav::propstat_dav::prop_dav::creationdate_':
            $this->_ls_ref_cdata = &$this->_ls_ref['creationdate'];
            break;
        case 'dav::multistatus_dav::response_dav::propstat_dav::prop_dav::getlastmodified_':
            $this->_ls_ref_cdata = &$this->_ls_ref['lastmodified'];
            break;
        case 'dav::multistatus_dav::response_dav::propstat_dav::prop_dav::getcontenttype_':
            $this->_ls_ref_cdata = &$this->_ls_ref['getcontenttype'];
            break;
        case 'dav::multistatus_dav::response_dav::propstat_dav::prop_dav::getcontentlength_':
            $this->_ls_ref_cdata = &$this->_ls_ref['getcontentlength'];
            break;
        case 'dav::multistatus_dav::response_dav::propstat_dav::prop_dav::lockdiscovery_dav::activelock_dav::depth_':
            $this->_ls_ref_cdata = &$this->_ls_ref['activelock_depth'];
            break;
        case 'dav::multistatus_dav::response_dav::propstat_dav::prop_dav::lockdiscovery_dav::activelock_dav::owner_dav::href_':
            $this->_ls_ref_cdata = &$this->_ls_ref['activelock_owner'];
            break;
        case 'dav::multistatus_dav::response_dav::propstat_dav::prop_dav::lockdiscovery_dav::activelock_dav::owner_':
            $this->_ls_ref_cdata = &$this->_ls_ref['activelock_owner'];
            break;
        case 'dav::multistatus_dav::response_dav::propstat_dav::prop_dav::lockdiscovery_dav::activelock_dav::timeout_':
            $this->_ls_ref_cdata = &$this->_ls_ref['activelock_timeout'];
            break;
        case 'dav::multistatus_dav::response_dav::propstat_dav::prop_dav::lockdiscovery_dav::activelock_dav::locktoken_dav::href_':
            $this->_ls_ref_cdata = &$this->_ls_ref['activelock_token'];
            break;
        case 'dav::multistatus_dav::response_dav::propstat_dav::prop_dav::lockdiscovery_dav::activelock_dav::locktype_dav::write_':
            $this->_ls_ref_cdata = &$this->_ls_ref['activelock_type'];
            $this->_ls_ref_cdata = 'write';
            $this->_ls_ref_cdata = &$this->_null;
            break;
        case 'dav::multistatus_dav::response_dav::propstat_dav::prop_dav::resourcetype_dav::collection_':
            $this->_ls_ref_cdata = &$this->_ls_ref['resourcetype'];
            $this->_ls_ref_cdata = 'collection';
            $this->_ls_ref_cdata = &$this->_null;
            break;
        case 'dav::multistatus_dav::response_dav::propstat_dav::status_':
            $this->_ls_ref_cdata = &$this->_ls_ref['status'];
            break;

        default:
            // handle unknown xml elements...
            $this->_ls_ref_cdata = &$this->_ls_ref[$this->_xmltree[$parser]];
        }
    }

    private function _propfind_cData($parser, $cdata) {
        if (trim($cdata) <> '') {
            // cdata must be appended, because sometimes the php xml parser makes multiple calls
            // to _propfind_cData before the xml end tag was reached...
            $this->_ls_ref_cdata .= $cdata;
        } else {
            // do nothing
        }
    }

    private function _delete_startElement($parser, $name, $attrs) {
        // lower XML Names... maybe break a RFC, don't know ...
        $propname = strtolower($name);
        $this->_xmltree[$parser] .= $propname . '_';

        // translate xml tree to a flat array ...
        switch($this->_xmltree[$parser]) {
        case 'dav::multistatus_dav::response_':
            // new element in mu
            $this->_delete_ref =& $this->_delete[$parser][];
            break;
        case 'dav::multistatus_dav::response_dav::href_':
            $this->_delete_ref_cdata = &$this->_ls_ref['href'];
            break;

        default:
            // handle unknown xml elements...
            $this->_delete_cdata = &$this->_delete_ref[$this->_xmltree[$parser]];
        }
    }


    private function _delete_cData($parser, $cdata) {
        if (trim($cdata) <> '') {
            $this->_delete_ref_cdata .= $cdata;
        } else {
            // do nothing
        }
    }


    private function _lock_startElement($parser, $name, $attrs) {
        // lower XML Names... maybe break a RFC, don't know ...
        $propname = strtolower($name);
        $this->_xmltree[$parser] .= $propname . '_';

        // translate xml tree to a flat array ...
        /*
        dav::prop_dav::lockdiscovery_dav::activelock_dav::depth_=
        dav::prop_dav::lockdiscovery_dav::activelock_dav::owner_dav::href_=
        dav::prop_dav::lockdiscovery_dav::activelock_dav::timeout_=
        dav::prop_dav::lockdiscovery_dav::activelock_dav::locktoken_dav::href_=
         */
        switch($this->_xmltree[$parser]) {
        case 'dav::prop_dav::lockdiscovery_dav::activelock_':
            // new element
            $this->_lock_ref =& $this->_lock[$parser][];
            break;
        case 'dav::prop_dav::lockdiscovery_dav::activelock_dav::locktype_dav::write_':
            $this->_lock_ref_cdata = &$this->_lock_ref['locktype'];
            $this->_lock_cdata = 'write';
            $this->_lock_cdata = &$this->_null;
            break;
        case 'dav::prop_dav::lockdiscovery_dav::activelock_dav::lockscope_dav::exclusive_':
            $this->_lock_ref_cdata = &$this->_lock_ref['lockscope'];
            $this->_lock_ref_cdata = 'exclusive';
            $this->_lock_ref_cdata = &$this->_null;
            break;
        case 'dav::prop_dav::lockdiscovery_dav::activelock_dav::depth_':
            $this->_lock_ref_cdata = &$this->_lock_ref['depth'];
            break;
        case 'dav::prop_dav::lockdiscovery_dav::activelock_dav::owner_dav::href_':
            $this->_lock_ref_cdata = &$this->_lock_ref['owner'];
            break;
        case 'dav::prop_dav::lockdiscovery_dav::activelock_dav::timeout_':
            $this->_lock_ref_cdata = &$this->_lock_ref['timeout'];
            break;
        case 'dav::prop_dav::lockdiscovery_dav::activelock_dav::locktoken_dav::href_':
            $this->_lock_ref_cdata = &$this->_lock_ref['locktoken'];
            break;
        default:
            // handle unknown xml elements...
            $this->_lock_cdata = &$this->_lock_ref[$this->_xmltree[$parser]];

        }
    }

    private function _lock_cData($parser, $cdata) {
        if (trim($cdata) <> '') {
            // $this->_error_log(($this->_xmltree[$parser]) . '='. htmlentities($cdata));
            $this->_lock_ref_cdata .= $cdata;
        } else {
            // do nothing
        }
    }


    private function header_add($string) {
        $this->_req[] = $string;
    }

    private function header_unset() {
        unset($this->_req);
    }

    private function create_basic_request($method) {
        $request = '';
        $this->header_add(sprintf('%s %s %s', $method, $this->_path, $this->_protocol));
        $this->header_add(sprintf('Host: %s:%s', $this->_server, $this->_port));
        //$request .= sprintf('Connection: Keep-Alive');
        $this->header_add(sprintf('User-Agent: %s', $this->_user_agent));
        $this->header_add('Connection: TE');
        $this->header_add('TE: Trailers');
        if ($this->_auth == 'basic') {
            $this->header_add(sprintf('Authorization: Basic %s', base64_encode("$this->_user:$this->_pass")));
        }
    }

    private function send_request() {
        // check if stream is declared to be open
        // only logical check we are not sure if socket is really still open ...
        if ($this->_connection_closed) {
            // reopen it
            // be sure to close the open socket.
            $this->close();
            $this->reopen();
        }

        // convert array to string
        $buffer = implode("\r\n", $this->_req);
        $buffer .= "\r\n\r\n";
        $this->_error_log($buffer);
        fputs($this->sock, $buffer);
    }

    private function get_respond() {
        $this->_error_log('get_respond()');
        // init vars (good coding style ;-)
        $buffer = '';
        $header = '';
        // attention: do not make max_chunk_size to big....
        $max_chunk_size = 8192;
        // be sure we got a open ressource
        if (! $this->sock) {
            $this->_error_log('socket is not open. Can not process response');
            return false;
        }

        // following code maybe helps to improve socket behaviour ... more testing needed
        // disabled at the moment ...
        // socket_set_timeout($this->sock,1 );
        // $socket_state = socket_get_status($this->sock);

        // read stream one byte by another until http header ends
        $i = 0;
        $matches = array();
        do {
            $header.=fread($this->sock, 1);
            $i++;
        } while (!preg_match('/\\r\\n\\r\\n$/',$header, $matches) && $i < $this->_maxheaderlenth);

        $this->_error_log($header);

        if (preg_match('/Connection: close\\r\\n/', $header)) {
            // This says that the server will close connection at the end of this stream.
            // Therefore we need to reopen the socket, before are sending the next request...
            $this->_error_log('Connection: close found');
            $this->_connection_closed = true;
        }
        // check how to get the data on socket stream
        // chunked or content-length (HTTP/1.1) or
        // one block until feof is received (HTTP/1.0)
        switch(true) {
        case (preg_match('/Transfer\\-Encoding:\\s+chunked\\r\\n/',$header)):
            $this->_error_log('Getting HTTP/1.1 chunked data...');
            do {
                $byte = '';
                $chunk_size='';
                do {
                    $chunk_size.=$byte;
                    $byte=fread($this->sock,1);
                    // check what happens while reading, because I do not really understand how php reads the socketstream...
                    // but so far - it seems to work here - tested with php v4.3.1 on apache 1.3.27 and Debian Linux 3.0 ...
                    if (strlen($byte) == 0) {
                        $this->_error_log('get_respond: warning --> read zero bytes');
                    }
                } while ($byte!="\r" and strlen($byte)>0);      // till we match the Carriage Return
                fread($this->sock, 1);                           // also drop off the Line Feed
                $chunk_size=hexdec($chunk_size);                // convert to a number in decimal system
                if ($chunk_size > 0) {
                    $buffer .= fread($this->sock,$chunk_size);
                }
                fread($this->sock, 2);                            // ditch the CRLF that trails the chunk
            } while ($chunk_size);                            // till we reach the 0 length chunk (end marker)
            break;

            // check for a specified content-length
        case preg_match('/Content\\-Length:\\s+([0-9]*)\\r\\n/',$header,$matches):
            $this->_error_log('Getting data using Content-Length '. $matches[1]);

            // check if we the content data size is small enough to get it as one block
            if ($matches[1] <= $max_chunk_size ) {
                // only read something if Content-Length is bigger than 0
                if ($matches[1] > 0 ) {
                    $buffer = fread($this->sock, $matches[1]);
                    $loadsize = strlen($buffer);
                    //did we realy get the full length?
                    if ($loadsize < $matches[1]) {
                        $max_chunk_size = $loadsize;
                        do {
                            $mod = $max_chunk_size % ($matches[1] - strlen($buffer));
                            $chunk_size = ($mod == $max_chunk_size ? $max_chunk_size : $matches[1] - strlen($buffer));
                            $buffer .= fread($this->sock, $chunk_size);
                            $this->_error_log('mod: ' . $mod . ' chunk: ' . $chunk_size . ' total: ' . strlen($buffer));
                        } while ($mod == $max_chunk_size);
                        break;
                    } else {
                        break;
                    }
                } else {
                    $buffer = '';
                    break;
                }
            }

            // data is to big to handle it as one. Get it chunk per chunk...
            //trying to get the full length of max_chunk_size
            $buffer = fread($this->sock, $max_chunk_size);
            $loadsize = strlen($buffer);
            if ($loadsize < $max_chunk_size) {
                $max_chunk_size = $loadsize;
            }
            do {
                $mod = $max_chunk_size % ($matches[1] - strlen($buffer));
                $chunk_size = ($mod == $max_chunk_size ? $max_chunk_size : $matches[1] - strlen($buffer));
                $buffer .= fread($this->sock, $chunk_size);
                $this->_error_log('mod: ' . $mod . ' chunk: ' . $chunk_size . ' total: ' . strlen($buffer));
            } while ($mod == $max_chunk_size);
            $loadsize = strlen($buffer);
            if ($loadsize < $matches[1]) {
                $buffer .= fread($this->sock, $matches[1] - $loadsize);
            }
            break;

            // check for 204 No Content
            // 204 responds have no body.
            // Therefore we do not need to read any data from socket stream.
        case preg_match('/HTTP\/1\.1\ 204/',$header):
            // nothing to do, just proceed
            $this->_error_log('204 No Content found. No further data to read..');
            break;
        default:
            // just get the data until foef appears...
            $this->_error_log('reading until feof...' . $header);
            socket_set_timeout($this->sock, 0, 0);
            while (!feof($this->sock)) {
                $buffer .= fread($this->sock, 4096);
            }
            // renew the socket timeout...does it do something ???? Is it needed. More debugging needed...
            socket_set_timeout($this->sock, $this->_socket_timeout, 0);
        }

        $this->_header = $header;
        $this->_body = $buffer;
        // $this->_buffer = $header . "\r\n\r\n" . $buffer;
        $this->_error_log($this->_header);
        $this->_error_log($this->_body);
    }


    private function process_respond() {
        $lines = explode("\r\n", $this->_header);
        $header_done = false;
        // $this->_error_log($this->_buffer);
        // First line should be a HTTP status line (see http://www.w3.org/Protocols/rfc2616/rfc2616-sec6.html#sec6)
        // Format is: HTTP-Version SP Status-Code SP Reason-Phrase CRLF
        list($ret_struct['status']['http-version'],
            $ret_struct['status']['status-code'],
            $ret_struct['status']['reason-phrase']) = explode(' ', $lines[0],3);

        // print "HTTP Version: '$http_version' Status-Code: '$status_code' Reason Phrase: '$reason_phrase'<br>";
        // get the response header fields
        // See http://www.w3.org/Protocols/rfc2616/rfc2616-sec6.html#sec6
        for($i=1; $i<count($lines); $i++) {
            if (rtrim($lines[$i]) == '' && !$header_done) {
                $header_done = true;
                // print "--- response header end ---<br>";

            }
            if (!$header_done ) {
                // store all found headers in array ...
                list($fieldname, $fieldvalue) = explode(':', $lines[$i]);
                // check if this header was allready set (apache 2.0 webdav module does this....).
                // If so we add the the value to the end the fieldvalue, separated by comma...
                if (empty($ret_struct['header'])) {
                    $ret_struct['header'] = array();
                }
                if (empty($ret_struct['header'][$fieldname])) {
                    $ret_struct['header'][$fieldname] = trim($fieldvalue);
                } else {
                    $ret_struct['header'][$fieldname] .= ',' . trim($fieldvalue);
                }
            }
        }
        // print 'string len of response_body:'. strlen($response_body);
        // print '[' . htmlentities($response_body) . ']';
        $ret_struct['body'] = $this->_body;
        $this->_error_log('process_respond: ' . var_export($ret_struct,true));
        return $ret_struct;

    }

    private function reopen() {
        // let's try to reopen a socket
        $this->_error_log('reopen a socket connection');
        return $this->open();
    }


    private function translate_uri($uri) {
        // remove all html entities...
        $native_path = html_entity_decode($uri);
        $parts = explode('/', $native_path);
        for ($i = 0; $i < count($parts); $i++) {
            // check if part is allready utf8
            if (iconv('UTF-8', 'UTF-8', $parts[$i]) == $parts[$i]) {
                $parts[$i] = rawurlencode($parts[$i]);
            } else {
                $parts[$i] = rawurlencode(utf8_encode($parts[$i]));
            }
        }
        return implode('/', $parts);
    }

    private function utf_decode_path($path) {
        $fullpath = $path;
        if (iconv('UTF-8', 'UTF-8', $fullpath) == $fullpath) {
            $this->_error_log("filename is utf-8. Needs conversion...");
            $fullpath = utf8_decode($fullpath);
        }
        return $fullpath;
    }

    private function _error_log($err_string) {
        if ($this->_debug) {
            error_log($err_string);
        }
    }
}