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<?php
require_once('XMLDocument.php');
class CalendarInfo {
public $url;
public $displayname;
public $getctag;
function __construct( $url, $displayname = null, $getctag = null ) {
$this->url = $url;
$this->displayname = $displayname;
$this->getctag = $getctag;
}
function __toString() {
return( '(URL: '.$this->url.' Ctag: '.$this->getctag.' Displayname: '.$this->displayname .')'. "\n" );
}
}
if(!defined("_FSOCK_TIMEOUT")){
define("_FSOCK_TIMEOUT", 10);
}
class CalDAVClient {
protected $base_url, $user, $pass, $entry, $protocol, $server, $port;
protected $principal_url;
protected $calendar_url;
protected $calendar_home_set;
protected $calendar_urls;
public $user_agent = 'DAViCalClient';
protected $headers = array();
protected $body = "";
protected $requestMethod = "GET";
protected $httpRequest = "";
protected $xmlRequest = "";
protected $xmlResponse = "";
protected $httpResponseCode = 0;
protected $httpResponseHeaders = "";
protected $httpParsedHeaders;
protected $httpResponseBody = "";
protected $parser;
private $debug = false;
function __construct( $base_url, $user, $pass ) {
$this->user = $user;
$this->pass = $pass;
$this->headers = array();
if ( preg_match( '#^(https?)://([a-z0-9.-]+)(:([0-9]+))?(/.*)$#', $base_url, $matches ) ) {
$this->server = $matches[2];
$this->base_url = $matches[5];
if ( $matches[1] == 'https' ) {
$this->protocol = 'ssl';
$this->port = 443;
}
else {
$this->protocol = 'tcp';
$this->port = 80;
}
if ( $matches[4] != '' ) {
$this->port = intval($matches[4]);
}
}
else {
trigger_error("Invalid URL: '".$base_url."'", E_USER_ERROR);
}
}
function SetDebug( $new_value ) {
$old_value = $this->debug;
if ( $new_value )
$this->debug = true;
else
$this->debug = false;
return $old_value;
}
function SetMatch( $match, $etag = '*' ) {
$this->headers['match'] = sprintf( "%s-Match: \"%s\"", ($match ? "If" : "If-None"), trim($etag,'"'));
}
function SetDepth( $depth = '0' ) {
$this->headers['depth'] = 'Depth: '. ($depth == '1' ? "1" : ($depth == 'infinity' ? $depth : "0") );
}
function SetUserAgent( $user_agent = null ) {
if ( !isset($user_agent) ) $user_agent = $this->user_agent;
$this->user_agent = $user_agent;
}
function SetContentType( $type ) {
$this->headers['content-type'] = "Content-type: $type";
}
function SetCalendar( $url ) {
$this->calendar_url = $url;
}
function ParseResponse( $response ) {
$pos = strpos($response, '<?xml');
if ($pos !== false) {
$this->xmlResponse = trim(substr($response, $pos));
$this->xmlResponse = preg_replace('{>[^>]*$}s', '>',$this->xmlResponse );
$parser = xml_parser_create_ns('UTF-8');
xml_parser_set_option ( $parser, XML_OPTION_SKIP_WHITE, 1 );
xml_parser_set_option ( $parser, XML_OPTION_CASE_FOLDING, 0 );
if ( xml_parse_into_struct( $parser, $this->xmlResponse, $this->xmlnodes, $this->xmltags ) === 0 ) {
printf( "XML parsing error: %s - %s\n", xml_get_error_code($parser), xml_error_string(xml_get_error_code($parser)) );
printf( "\nXML Reponse:\n%s\n", $this->xmlResponse );
}
xml_parser_free($parser);
}
}
function ParseResponseHeaders() {
if ( empty($this->httpResponseHeaders) ) return array();
if ( !isset($this->httpParsedHeaders) ) {
$this->httpParsedHeaders = array();
$headers = str_replace("\r\n", "\n", $this->httpResponseHeaders);
$ar_headers = explode("\n", $headers);
$last_header = '';
foreach ($ar_headers as $cur_headers) {
if( preg_match( '{^\s*\S}', $cur_headers) ) $header_name = $last_header;
else if ( preg_match( '{^(\S*):', $cur_headers, $matches) ) {
$header_name = $matches[1];
$last_header = $header_name;
if ( empty($this->httpParsedHeaders[$header_name]) ) $this->httpParsedHeaders[$header_name] = array();
}
$this->httpParsedHeaders[$header_name][] = $cur_headers;
}
}
return $this->httpParsedHeaders;
}
function GetHttpRequest() {
return $this->httpRequest;
}
function GetResponseHeaders() {
return $this->httpResponseHeaders;
}
function GetResponseBody() {
return $this->httpResponseBody;
}
function GetXmlRequest() {
return $this->xmlRequest;
}
function GetXmlResponse() {
return $this->xmlResponse;
}
function DoRequest( $url = null ) {
$headers = array();
if ( !isset($url) ) $url = $this->base_url;
$this->request_url = $url;
$url = preg_replace('{^https?://[^/]+}', '', $url);
if ( preg_match( '{[^%?&=+,.-_/a-z0-9]}', $url ) ) {
$url = str_replace(rawurlencode('/'),'/',rawurlencode($url));
$url = str_replace(rawurlencode('?'),'?',$url);
$url = str_replace(rawurlencode('&'),'&',$url);
$url = str_replace(rawurlencode('='),'=',$url);
$url = str_replace(rawurlencode('+'),'+',$url);
$url = str_replace(rawurlencode(','),',',$url);
}
$headers[] = $this->requestMethod." ". $url . " HTTP/1.1";
$headers[] = "Authorization: Basic ".base64_encode($this->user .":". $this->pass );
$headers[] = "Host: ".$this->server .":".$this->port;
if ( !isset($this->headers['content-type']) ) $this->headers['content-type'] = "Content-type: text/plain";
foreach( $this->headers as $ii => $head ) {
$headers[] = $head;
}
$headers[] = "Content-Length: " . strlen($this->body);
$headers[] = "User-Agent: " . $this->user_agent;
$headers[] = 'Connection: close';
$this->httpRequest = join("\r\n",$headers);
$this->xmlRequest = $this->body;
$this->xmlResponse = '';
$fip = fsockopen( $this->protocol . '://' . $this->server, $this->port, $errno, $errstr, _FSOCK_TIMEOUT);
if ( !(get_resource_type($fip) == 'stream') ) return false;
if ( !fwrite($fip, $this->httpRequest."\r\n\r\n".$this->body) ) { fclose($fip); return false; }
$response = "";
while( !feof($fip) ) { $response .= fgets($fip,8192); }
fclose($fip);
list( $this->httpResponseHeaders, $this->httpResponseBody ) = preg_split( '{\r?\n\r?\n}s', $response, 2 );
if ( preg_match( '{Transfer-Encoding: chunked}i', $this->httpResponseHeaders ) ) $this->Unchunk();
if ( preg_match('/HTTP\/\d\.\d (\d{3})/', $this->httpResponseHeaders, $status) )
$this->httpResponseCode = intval($status[1]);
else
$this->httpResponseCode = 0;
$this->headers = array();
$this->ParseResponse($this->httpResponseBody);
return $response;
}
function Unchunk() {
$content = '';
$chunks = $this->httpResponseBody;
do {
$bytes = 0;
if ( preg_match('{^((\r\n)?\s*([ 0-9a-fA-F]+)(;[^\n]*)?\r?\n)}', $chunks, $matches ) ) {
$octets = $matches[3];
$bytes = hexdec($octets);
$pos = strlen($matches[1]);
if ( $bytes > 0 ) {
$content .= substr($chunks,$pos,$bytes);
$chunks = substr($chunks,$pos + $bytes + 2);
}
}
else {
$content .= $chunks;
}
}
while( $bytes > 0 );
$this->httpResponseBody = $content;
}
function DoOptionsRequest( $url = null ) {
$this->requestMethod = "OPTIONS";
$this->body = "";
$this->DoRequest($url);
$this->ParseResponseHeaders();
$allowed = '';
foreach( $this->httpParsedHeaders['Allow'] as $allow_header ) {
$allowed .= preg_replace( '/^(Allow:)?\s+([a-z, ]+)\r?\n.*/is', '$1,', $allow_header );
}
$options = array_flip( preg_split( '/[, ]+/', trim($allowed, ', ') ));
return $options;
}
function DoXMLRequest( $request_method, $xml, $url = null ) {
$this->body = $xml;
$this->requestMethod = $request_method;
$this->SetContentType("text/xml");
return $this->DoRequest($url);
}
function DoGETRequest( $url ) {
$this->body = "";
$this->requestMethod = "GET";
return $this->DoRequest( $url );
}
function DoHEADRequest( $url ) {
$this->body = "";
$this->requestMethod = "HEAD";
return $this->DoRequest( $url );
}
function DoPUTRequest( $url, $icalendar, $etag = null ) {
$this->body = $icalendar;
$this->requestMethod = "PUT";
if ( $etag != null ) {
$this->SetMatch( ($etag != '*'), $etag );
}
$this->SetContentType('text/calendar; charset="utf-8"');
$this->DoRequest($url);
$etag = null;
if ( preg_match( '{^ETag:\s+"([^"]*)"\s*$}im', $this->httpResponseHeaders, $matches ) ) $etag = $matches[1];
if ( !isset($etag) || $etag == '' ) {
if ( $this->debug ) printf( "No etag in:\n%s\n", $this->httpResponseHeaders );
$save_request = $this->httpRequest;
$save_response_headers = $this->httpResponseHeaders;
$this->DoHEADRequest( $url );
if ( preg_match( '{^Etag:\s+"([^"]*)"\s*$}im', $this->httpResponseHeaders, $matches ) ) $etag = $matches[1];
if ( !isset($etag) || $etag == '' ) {
if ( $this->debug ) printf( "Still No etag in:\n%s\n", $this->httpResponseHeaders );
}
$this->httpRequest = $save_request;
$this->httpResponseHeaders = $save_response_headers;
}
return $etag;
}
function DoDELETERequest( $url, $etag = null ) {
$this->body = "";
$this->requestMethod = "DELETE";
if ( $etag != null ) {
$this->SetMatch( true, $etag );
}
$this->DoRequest($url);
return $this->httpResponseCode;
}
function DoPROPFINDRequest( $url, $props, $depth = 0 ) {
$this->SetDepth($depth);
$xml = new XMLDocument( array( 'DAV:' => '', 'urn:ietf:params:xml:ns:caldav' => 'C' ) );
$prop = new XMLElement('prop');
foreach( $props AS $v ) {
$xml->NSElement($prop,$v);
}
$this->body = $xml->Render('propfind',$prop );
$this->requestMethod = "PROPFIND";
$this->SetContentType("text/xml");
$this->DoRequest($url);
return $this->GetXmlResponse();
}
function PrincipalURL( $url = null ) {
if ( isset($url) ) {
$this->principal_url = $url;
}
return $this->principal_url;
}
function CalendarHomeSet( $urls = null ) {
if ( isset($urls) ) {
if ( ! is_array($urls) ) $urls = array($urls);
$this->calendar_home_set = $urls;
}
return $this->calendar_home_set;
}
function CalendarUrls( $urls = null ) {
if ( isset($urls) ) {
if ( ! is_array($urls) ) $urls = array($urls);
$this->calendar_urls = $urls;
}
return $this->calendar_urls;
}
function HrefValueInside( $tagname ) {
foreach( $this->xmltags[$tagname] AS $k => $v ) {
$j = $v + 1;
if ( $this->xmlnodes[$j]['tag'] == 'DAV::href' ) {
return rawurldecode($this->xmlnodes[$j]['value']);
}
}
return null;
}
function HrefForProp( $tagname, $i = 0 ) {
if ( isset($this->xmltags[$tagname]) && isset($this->xmltags[$tagname][$i]) ) {
$j = $this->xmltags[$tagname][$i];
while( $j-- > 0 && $this->xmlnodes[$j]['tag'] != 'DAV::href' ) {
if ( $this->xmlnodes[$j]['tag'] == 'DAV::status' && $this->xmlnodes[$j]['value'] != 'HTTP/1.1 200 OK' ) return null;
}
if ( $j > 0 && isset($this->xmlnodes[$j]['value']) ) {
return rawurldecode($this->xmlnodes[$j]['value']);
}
}
else {
if ( $this->debug ) printf( "xmltags[$tagname] or xmltags[$tagname][$i] is not set\n");
}
return null;
}
function HrefForResourcetype( $tagname, $i = 0 ) {
if ( isset($this->xmltags[$tagname]) && isset($this->xmltags[$tagname][$i]) ) {
$j = $this->xmltags[$tagname][$i];
while( $j-- > 0 && $this->xmlnodes[$j]['tag'] != 'DAV::resourcetype' );
if ( $j > 0 ) {
while( $j-- > 0 && $this->xmlnodes[$j]['tag'] != 'DAV::href' );
if ( $j > 0 && isset($this->xmlnodes[$j]['value']) ) {
return rawurldecode($this->xmlnodes[$j]['value']);
}
}
}
return null;
}
function GetOKProps( $nodenum ) {
$props = null;
$level = $this->xmlnodes[$nodenum]['level'];
$status = '';
while ( $this->xmlnodes[++$nodenum]['level'] >= $level ) {
if ( $this->xmlnodes[$nodenum]['tag'] == 'DAV::propstat' ) {
if ( $this->xmlnodes[$nodenum]['type'] == 'open' ) {
$props = array();
$status = '';
}
else {
if ( $status == 'HTTP/1.1 200 OK' ) break;
}
}
elseif ( !isset($this->xmlnodes[$nodenum]) || !is_array($this->xmlnodes[$nodenum]) ) {
break;
}
elseif ( $this->xmlnodes[$nodenum]['tag'] == 'DAV::status' ) {
$status = $this->xmlnodes[$nodenum]['value'];
}
else {
$props[] = $this->xmlnodes[$nodenum];
}
}
return $props;
}
function FindPrincipal( $url=null ) {
$xml = $this->DoPROPFINDRequest( $url, array('resourcetype', 'current-user-principal', 'owner', 'principal-URL',
'urn:ietf:params:xml:ns:caldav:calendar-home-set'), 1);
$principal_url = $this->HrefForProp('DAV::principal');
if ( !isset($principal_url) ) {
foreach( array('DAV::current-user-principal', 'DAV::principal-URL', 'DAV::owner') AS $href ) {
if ( !isset($principal_url) ) {
$principal_url = $this->HrefValueInside($href);
}
}
}
return $this->PrincipalURL($principal_url);
}
function FindCalendarHome( $recursed=false ) {
if ( !isset($this->principal_url) ) {
$this->FindPrincipal();
}
if ( $recursed ) {
$this->DoPROPFINDRequest( $this->principal_url, array('urn:ietf:params:xml:ns:caldav:calendar-home-set'), 0);
}
$calendar_home = array();
foreach( $this->xmltags['urn:ietf:params:xml:ns:caldav:calendar-home-set'] AS $k => $v ) {
if ( $this->xmlnodes[$v]['type'] != 'open' ) continue;
while( $this->xmlnodes[++$v]['type'] != 'close' && $this->xmlnodes[$v]['tag'] != 'urn:ietf:params:xml:ns:caldav:calendar-home-set' ) {
if ( $this->xmlnodes[$v]['tag'] == 'DAV::href' && isset($this->xmlnodes[$v]['value']) )
$calendar_home[] = rawurldecode($this->xmlnodes[$v]['value']);
}
}
if ( !$recursed && count($calendar_home) < 1 ) {
$calendar_home = $this->FindCalendarHome(true);
}
return $this->CalendarHomeSet($calendar_home);
}
function FindCalendars( $recursed=false ) {
if ( !isset($this->calendar_home_set[0]) ) {
$this->FindCalendarHome();
}
$this->DoPROPFINDRequest( $this->calendar_home_set[0], array('resourcetype','displayname','http://calendarserver.org/ns/:getctag'), 1);
$calendars = array();
if ( isset($this->xmltags['urn:ietf:params:xml:ns:caldav:calendar']) ) {
$calendar_urls = array();
foreach( $this->xmltags['urn:ietf:params:xml:ns:caldav:calendar'] AS $k => $v ) {
$calendar_urls[$this->HrefForProp('urn:ietf:params:xml:ns:caldav:calendar', $k)] = 1;
}
foreach( $this->xmltags['DAV::href'] AS $i => $hnode ) {
$href = rawurldecode($this->xmlnodes[$hnode]['value']);
if ( !isset($calendar_urls[$href]) ) continue;
$calendar = new CalendarInfo($href);
$ok_props = $this->GetOKProps($hnode);
foreach( $ok_props AS $v ) {
switch( $v['tag'] ) {
case 'http://calendarserver.org/ns/:getctag':
$calendar->getctag = $v['value'];
break;
case 'DAV::displayname':
$calendar->displayname = $v['value'];
break;
}
}
$calendars[] = $calendar;
}
}
return $this->CalendarUrls($calendars);
}
function GetCalendarDetails( $url = null ) {
if ( isset($url) ) $this->SetCalendar($url);
$calendar_properties = array( 'resourcetype', 'displayname', 'http://calendarserver.org/ns/:getctag', 'urn:ietf:params:xml:ns:caldav:calendar-timezone', 'supported-report-set' );
$this->DoPROPFINDRequest( $this->calendar_url, $calendar_properties, 0);
$hnode = $this->xmltags['DAV::href'][0];
$href = rawurldecode($this->xmlnodes[$hnode]['value']);
$calendar = new CalendarInfo($href);
$ok_props = $this->GetOKProps($hnode);
foreach( $ok_props AS $k => $v ) {
$name = preg_replace( '{^.*:}', '', $v['tag'] );
if ( isset($v['value'] ) ) {
$calendar->{$name} = $v['value'];
}
}
return $calendar;
}
function GetCollectionETags( $url = null ) {
if ( isset($url) ) $this->SetCalendar($url);
$this->DoPROPFINDRequest( $this->calendar_url, array('getetag'), 1);
$etags = array();
if ( isset($this->xmltags['DAV::getetag']) ) {
foreach( $this->xmltags['DAV::getetag'] AS $k => $v ) {
$href = $this->HrefForProp('DAV::getetag', $k);
if ( isset($href) && isset($this->xmlnodes[$v]['value']) ) $etags[$href] = $this->xmlnodes[$v]['value'];
}
}
return $etags;
}
function CalendarMultiget( $event_hrefs, $url = null ) {
if ( isset($url) ) $this->SetCalendar($url);
$hrefs = '';
foreach( $event_hrefs AS $k => $href ) {
$href = str_replace( rawurlencode('/'),'/',rawurlencode($href));
$hrefs .= '<href>'.$href.'</href>';
}
$this->body = <<<EOXML
<?xml version="1.0" encoding="utf-8" ?>
<C:calendar-multiget xmlns="DAV:" xmlns:C="urn:ietf:params:xml:ns:caldav">
<prop><getetag/><C:calendar-data/></prop>
$hrefs
</C:calendar-multiget>
EOXML;
$this->requestMethod = "REPORT";
$this->SetContentType("text/xml");
$this->DoRequest( $this->calendar_url );
$events = array();
if ( isset($this->xmltags['urn:ietf:params:xml:ns:caldav:calendar-data']) ) {
foreach( $this->xmltags['urn:ietf:params:xml:ns:caldav:calendar-data'] AS $k => $v ) {
$href = $this->HrefForProp('urn:ietf:params:xml:ns:caldav:calendar-data', $k);
$events[$href] = $this->xmlnodes[$v]['value'];
}
}
else {
foreach( $event_hrefs AS $k => $href ) {
$this->DoGETRequest($href);
$events[$href] = $this->httpResponseBody;
}
}
return $events;
}
function DoCalendarQuery( $filter, $url = '' ) {
if ( !empty($url) ) $this->SetCalendar($url);
$this->body = <<<EOXML
<?xml version="1.0" encoding="utf-8" ?>
<C:calendar-query xmlns:D="DAV:" xmlns:C="urn:ietf:params:xml:ns:caldav">
<D:prop>
<C:calendar-data/>
<D:getetag/>
</D:prop>$filter
</C:calendar-query>
EOXML;
$this->requestMethod = "REPORT";
$this->SetContentType("text/xml");
$this->DoRequest( $this->calendar_url );
$report = array();
foreach( $this->xmlnodes as $k => $v ) {
switch( $v['tag'] ) {
case 'DAV::response':
if ( $v['type'] == 'open' ) {
$response = array();
}
elseif ( $v['type'] == 'close' ) {
$report[] = $response;
}
break;
case 'DAV::href':
$response['href'] = basename( rawurldecode($v['value']) );
break;
case 'DAV::getetag':
$response['etag'] = preg_replace('/^"?([^"]+)"?/', '$1', $v['value']);
break;
case 'urn:ietf:params:xml:ns:caldav:calendar-data':
$response['data'] = $v['value'];
break;
}
}
return $report;
}
function GetEvents( $start = null, $finish = null, $relative_url = '' ) {
$filter = "";
if ( isset($start) && isset($finish) )
$range = "<C:time-range start=\"$start\" end=\"$finish\"/>";
else
$range = '';
$filter = <<<EOFILTER
<C:filter>
<C:comp-filter name="VCALENDAR">
<C:comp-filter name="VEVENT">
$range
</C:comp-filter>
</C:comp-filter>
</C:filter>
EOFILTER;
return $this->DoCalendarQuery($filter, $relative_url);
}
function GetTodos( $start, $finish, $completed = false, $cancelled = false, $relative_url = "" ) {
if ( $start && $finish ) {
$time_range = <<<EOTIME
<C:time-range start="$start" end="$finish"/>
EOTIME;
}
$neg_cancelled = ( $cancelled === true ? "no" : "yes" );
$neg_completed = ( $cancelled === true ? "no" : "yes" );
$filter = <<<EOFILTER
<C:filter>
<C:comp-filter name="VCALENDAR">
<C:comp-filter name="VTODO">
<C:prop-filter name="STATUS">
<C:text-match negate-condition="$neg_completed">COMPLETED</C:text-match>
</C:prop-filter>
<C:prop-filter name="STATUS">
<C:text-match negate-condition="$neg_cancelled">CANCELLED</C:text-match>
</C:prop-filter>$time_range
</C:comp-filter>
</C:comp-filter>
</C:filter>
EOFILTER;
return $this->DoCalendarQuery($filter, $relative_url);
}
function GetEntryByUid( $uid, $relative_url = '', $component_type = 'VEVENT' ) {
$filter = "";
if ( $uid ) {
$filter = <<<EOFILTER
<C:filter>
<C:comp-filter name="VCALENDAR">
<C:comp-filter name="$component_type">
<C:prop-filter name="UID">
<C:text-match icollation="i;octet">$uid</C:text-match>
</C:prop-filter>
</C:comp-filter>
</C:comp-filter>
</C:filter>
EOFILTER;
}
return $this->DoCalendarQuery($filter, $relative_url);
}
function GetEntryByHref( $href ) {
$href = str_replace( rawurlencode('/'),'/',rawurlencode($href));
return $this->DoGETRequest( $href );
}
}