mirror of
https://github.com/EGroupware/egroupware.git
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558 lines
18 KiB
PHP
558 lines
18 KiB
PHP
<?php
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/* WARNING: EXPERIMENTAL CODE DO NOT USE FOR PRODUCTION */
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/**
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* @file
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* IcalsrvNG: Export and Import Egw events and task as ICalendar over http using
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* Virtual Calendars
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*
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* Possible clients include Mozilla Calendar/Sunbird, Korganizer, Apple Ical
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* and Evolution.
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* @note <b> THIS IS STILL EXPERIMENTAL CODE </b> do not use in production.
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* @note this script is supposed to be at: egw-root/icalsrv.php
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*
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* @version 0.9.37-ng-a2 added a todo plan for v0.9.40
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* @date 20060510
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* @since 0.9.37-ng-a1 removed fixed default domain authentication
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* @since 0.9.36-ng-a1 first version for NAPI-3.1 (write in non owner rscs)
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* @author Jan van Lieshout <jvl (at) xs4all.nl> Rewrite and extension for egw 1.2.
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* (see: @url http://www.egroupware.org )
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* $Id$
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* Based on some code from:
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* @author RalfBecker@outdoor-training.de (some original code base)
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*
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* <b>license:</b><br>
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* This program is free software; you can redistribute it and/or modify it
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* under the terms of the GNU General Public License as published by the
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* Free Software Foundation; either version 2 of the License, or (at your
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* option) any later version.
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*
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* @todo make this 'ical-service' enabled/disabled from the egw
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* admin interface
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* @todo make the definition of virtual calendars possible from a 'ical-service' web
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* user interface user
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* @todo (for 0.9.40 versions) move much parsing of the vc to class.vcsrv.inc.php
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* and add the $vcpath var where pathinfo is parsed to communicate to vc_X class
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* @bug if you dont have enough privilages to access a personal calendar of someone
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* icalsrv will not give you an access denied error, but will just return no events
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* from this calendar. (Needed otherwise you cannot collect events from multiple resources
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* into a single virtual calendar.
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*
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* @todo make code robust against xss attacke etc.
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*/
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//-------- basic operation configuration variables ----------
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$logdir = False; // set to false for no logging
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#$logdir = '/tmp'; // set to a valid (writable) directory to get log file generation
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// set to true for debug logging to errorlog
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//$isdebug = True;
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$isdebug = False;
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/** Disallow users to import in non owned calendars and infologs
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* @var boolean $disable_nonowner_import
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*/
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$disable_nonowner_import = false;
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// icalsrv variant with session setup modeled after xmlrpc.php
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//die(print_r($_COOKIE, true));
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$icalsrv = array();
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$GLOBALS['egw_info'] = array();
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$GLOBALS['egw_info']['flags'] = array(
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'currentapp' => 'login',
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'noheader' => True,
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'nonavbar' => True,
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'disable_Template_class' => True
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);
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include('header.inc.php');
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$ical_login = split('\@',$_SERVER['PHP_AUTH_USER']);
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if($ical_login[1])
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{
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$ical_user = $ical_login[0];
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$domain = $ical_login[1];
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unset($ical_login);
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}
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else
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{
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$ical_user = $_SERVER['PHP_AUTH_USER'];
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$domain = get_var('domain',array('COOKIE','GET'));
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}
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$sessionid = get_var('sessionid',array('COOKIE','GET'));
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$kp3 = get_var('kp3',array('COOKIE','GET'));
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$domain = $domain ? $domain : $GLOBALS['egw_info']['server']['default_domain'];
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$icalsrv['session_ok'] = $GLOBALS['egw']->session->verify($sessionid,$kp3);
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if($icalsrv['session_ok'])
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{
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$icalsrv['authed'] = True;
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}
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if(!$icalsrv['session_ok'] && isset($_SERVER['PHP_AUTH_USER']) && isset($_SERVER['PHP_AUTH_PW']))
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{
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$icalsrv['authed'] = $GLOBALS['egw']->session->create($ical_user . '@' . $domain, $_SERVER['PHP_AUTH_PW'], 'text');
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}
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if($icalsrv['authed'])
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{
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$icalsrv['session_ok'] = True;
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// This may not even be necessary:
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$GLOBALS['egw_info']['flags']['currentapp'] = 'icalsrv';
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}
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// bad session or bad authentication so please re-authenticate..
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if(!($icalsrv['session_ok'] && $icalsrv['authed']))
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{
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if($isdebug)
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{
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error_log('line ' . __LINE__ . ': Session: '. $icalsrv['session_ok'] . ', Authed: ' . $icalsrv['authed']);
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}
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header('WWW-Authenticate: Basic realm="ICal Server"');
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header('HTTP/1.1 401 Unauthorized');
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exit;
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}
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/* Moved after the auth header send. It is normal to save this check until now, similar to how simple eGroupWare access control works for a browser login. (Milosch) */
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if(!@isset($GLOBALS['egw_info']['user']['apps']['icalsrv']))
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{
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fail_exit('IcalSRV not enabled','403');
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}
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// Ok! We have a session and access to icalsrv!
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// now set the variables that will control the working mode of icalvircal
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// the defines are in the icalsrv_resourcehandler sourcefile
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require_once EGW_SERVER_ROOT. '/icalsrv/inc/class.icalsrv_resourcehandler.inc.php' ;
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/** uid mapping export configuration switch
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* @var int
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* Parameter that determines, a the time of export from Egw (aka dowload by client), how
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* ical elements (like VEVENT's) get their uid fields filled, from data in
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* the related Egroupware element.
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* See further in @ref secuidmapping in the icalsrv_resourcehandler documentation.
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*/
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$uid_export_mode = UMM_ID2UID;
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/** uid mapping import configuration switch
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* @var int
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* Parameter that determines, at the time of import into Egw (aka publish by client), how
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* ical elements (like VEVENT's) will find, based on their uid fields, related egw
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* elements, that are then updated with the ical info.
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* See further in @ref secuidmapping in the icalsrv_resourcehandler documentation.
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*/
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$uid_import_mode = UMM_UID2ID;
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/**
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* @section secisuidmapping Basic Possible settings of UID to ID mapping.
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*
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* @warning the default setting in icalsrv.php is one of the 3 basic uid mapping modes:
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* #The standard mode that allows a published client calendar to add new events and todos
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* to the egw calendar, and allows to update already before published (to egw) and
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* at least once downloaded (from egw) events and todos.
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* .
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* setting: <PRE>$uid_export_mode = UMM_ID2UID; $uid_import_mode = UMM_UID2ID; </PRE> (default)
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* #The fool proof mode that will prevent accidental change or deletion of existing
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* egw events or todos. Note that the price to pay is <i>duplication</i> on republishing or
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* re-download!
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* .
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* setting: <PRE>$uid_export_mode = UMM_NEWUID; $uid_import_mode = UMM_NEWID; </PRE> (discouraged)
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* #The flaky sync mode that in principle would make each event and todo recognizable by
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* both the client and egw at each moment. In this mode a once given uid field is both used
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* in the client and in egw. Unfortunately there are quite some problems with this, making it
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* very unreliable to use!
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* .
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* setting: <PRE>$uid_export_mode = UMM_UID2UID; $uid_import_mode = UMM_UID2UID; </PRE> (discouraged!)
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*/
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/** allow elements gone(deleted) in egw to be imported again from client
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* @var boolean $reimport_missing_elements
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*/
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$reimport_missing_elements = true;
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//-------- end of basic operation configuration variables ----------
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#error_log('_SERVER:' . print_r($_SERVER, true));
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// go parse our request uri
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$requri = $_SERVER['REQUEST_URI'];
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$reqpath= $_SERVER['PATH_INFO'];
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$reqagent = $_SERVER['HTTP_USER_AGENT'];
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# maybe later also do something with content_type?
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# if(!empty($_SERVER['CONTENT_TYPE'])) {
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# if(strpos($_SERVER['CONTENT_TYPE'], 'application/vnd....+xml') !== false) {
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# ical/ics ???
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// ex1: $requri='egroupware/icalsrv.php/demouser/todos.ics'
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// then $reqpath='/demouser/todos.ics'
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// $rvc_owner='demouser'
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// $rvc_basename='/todos.ics'
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// ex2:or $recuri ='egroupware/icalsrv.php/uk/holidays.ics'
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// then $reqpath='/uk/holidays.ics'
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// $rvc_owner = null; // unset
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// $rvc_basename=null; // unset
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// ex3: $requri='egroupware/icalsrv.php/demouser/todos?pw=mypw01'
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// then $reqpath='/demouser/todos.ics'
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// $rvc_owner='demouser'
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// $rvc_basename='/todos.ics'
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// $_GET['pw'] = 'mypw01'
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// S-- parse the $reqpath to get $reqvircal names
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unset($reqvircal_owner);
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unset($reqvircal_owner_id);
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unset($reqvircal_basename);
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if(empty($_SERVER['PATH_INFO']))
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{
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// no specific calendar requested, so do default.ics
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$reqvircal_pathname = '/default.ics';
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// try owner + base for a personal vircal request
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}
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elseif(preg_match('#^/([\w]+)(/[^<^>^?]+)$#', $_SERVER['PATH_INFO'], $matches))
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{
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$reqvircal_pathname = $matches[0];
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$reqvircal_owner = $matches[1];
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$reqvircal_basename = $matches[2];
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if(!$reqvircal_owner_id = $GLOBALS['egw']->accounts->name2id($reqvircal_owner))
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{
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// owner is unknown, so forget about personal calendar
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unset($reqvircal_owner);
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unset($reqvircal_basename);
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}
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// check for decent non personal path
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}
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elseif(preg_match('#^(/[^<^>]+)$#', $_SERVER['PATH_INFO'], $matches))
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{
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$reqvircal_pathname = $matches[0];
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// just default to standard path
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}
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else
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{
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$reqvircal_pathname = 'default.ics';
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}
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if($isdebug)
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{
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error_log('http-user-agent:' . $reqagent
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. ',pathinfo:' . $reqpath . ',rvc_pathname:' . $reqvircal_pathname
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. ',rvc_owner:' . $reqvircal_owner . ',rvc_owner_id:' . $reqvircal_owner_id
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. ',rvc_basename:' . $reqvircal_basename);
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}
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// S1A search for the requested calendar in the vircal_ardb's
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if(is_numeric($reqvircal_owner_id))
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{
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// check if the requested personal calender is provided by the owner..
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/**
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* @todo 1. create somehow the list of available personal vircal arstores
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* note: this should be done via preferences and read repository, but how....
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* I have to find out and write it...
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*/
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// find personal database of (array stored) virtual calendars
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$cnmsg = 'calendar [' . $reqvircal_basename . '] for user [' . $reqvircal_owner . ']';
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$vo_personal_vircal_ardb =& CreateObject('icalsrv.personal_vircal_ardb', $reqvircal_owner_id);
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if(!(is_object($vo_personal_vircal_ardb)))
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{
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error_log('icalsrv.php: couldnot create personal vircal_ardb for user:' . $reqvircal_owner);
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fail_exit('could not access' . $cnmsg, '403');
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}
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// check if a /<username>/list.html is requested
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if($reqvircal_basename == '/list.html')
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{
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echo $vo_personal_vircal_ardb->listing(1);
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$GLOBALS['egw']->common->egw_exit();
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}
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error_log('vo_personal_vircal_ardb:' . print_r($vo_personal_vircal_ardb->calendars, true));
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// search our calendar in personal vircal database
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if(!($vircal_arstore = $vo_personal_vircal_ardb->calendars[$reqvircal_basename]))
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{
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error_log('icalsrv.php: ' . $cnmsg . ' not found.');
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fail_exit($cnmsg . ' not found.' , '404');
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}
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// oke we have a valid personal vircal in array_storage format!
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}
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else
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{
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// check if the requested system calender is provided by system
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$cnmsg = 'system calendar [' . $reqvircal_pathname . ']';
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/**
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* @todo 1. create somehow the list of available system vircal
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* arstores note: this should be done via preferences and read
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* repository, but how.... I have to find out
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*/
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// find system database of (array stored) virtual calendars
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$system_vircal_ardb = CreateObject('icalsrv.system_vircal_ardb');
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if(!(is_object($system_vircal_ardb)))
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{
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error_log('icalsrv.php: couldnot create system vircal_ardb');
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fail_exit('couldnot access ' . $cnmsg, '403');
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}
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// check if a /list.html is requested
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if($reqvircal_pathname == '/list.html')
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{
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echo $system_vircal_ardb->listing(1);
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$GLOBALS['egw']->common->egw_exit();
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}
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// search our calendar in system vircal database
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if(!($vircal_arstore = $system_vircal_ardb->calendars[$reqvircal_pathname]))
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{
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fail_exit($cnmsg . ' not found', '404');
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}
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// oke we have a valid system vircal in array_storage format!
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}
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//die(print_r($_COOKIE,true). " in ". __FILE__.", line ".__LINE__);
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if($isdebug)
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{
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error_log('vircal_arstore:' . print_r($vircal_arstore, true));
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}
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// build a virtual calendar with ical facilities from the found vircal
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// array_storage data
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$icalvc =& CreateObject('icalsrv.icalvircal');
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if(!$icalvc->fromArray($vircal_arstore))
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{
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error_log('icalsrv.php: ' . $cnmsg . ' couldnot restore from repository.' );
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fail_exit($cnmsg . ' internal problem ' , '403');
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}
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// YES: $icalvc created ok! acces rights needs to be checked though!
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// HACK: ATM basic auth is always needed!! (JVL) ,so we force icalvc into it
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$icalvc->auth = ':basic';
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// check if the virtual calendar demands authentication
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if(strpos($icalvc->auth,'none') !== false)
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{
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// no authentication demanded so continue
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}
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elseif(strpos($icalvc->auth,'basic') !== false)
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{
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//basic http authentication demanded
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//so exit on non authenticated http request
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//-- As we atm only allow authenticated users the
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// actions in the next lines are already done at the begining
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// of this file --
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// if((!isset($_SERVER['PHP_AUTH_USER'])) ||
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// (!$GLOBALS['egw']->auth->authenticate($_SERVER['PHP_AUTH_USER'],
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// $_SERVER['PHP_AUTH_PW']))) {
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// if($isdebug)
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// error_log('SESSION IS SETUP, BUT AUTHENTICATE FAILED'.$_SERVER['PHP_AUTH_USER'] );
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// header('WWW-Authenticate: Basic realm="ICal Server"');
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// header('HTTP/1.1 401 Unauthorized');
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// exit;
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// }
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// // else, use the active basic authentication to set preferences
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// $user_id = $GLOBALS['egw']->accounts->name2id($_SERVER['PHP_AUTH_USER']);
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// $GLOBALS['egw_info']['user']['account_id'] = $user_id;
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// error_log(' ACCOUNT SETUP FOR'
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// . $GLOBALS['egw_info']['user']['account_id']);
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}
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elseif(strpos($icalvc->auth,'ssl') !== false)
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{
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// ssl demanded, check if we are in https authenticated connection
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// if not redirect to https
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error_log('icalsrv.php:' . $cnmsg . ' demands secure connection');
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fail_exit($cnmsg . ' demands secure connection: please use https', '403');
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}
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else
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{
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error_log('*** icalsrv.php:' . $cnmsg . ' requires unknown authentication method:'
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. $icalcv->auth);
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fail_exit($cnmsg . ' demands unavailable authentication method:'
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. $icalcv->auth, '403');
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}
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/**
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* @todo this extra password checkin should, at least for logged-in users,
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* better be incorporated in the ACL checkings. At some time...
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*/
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// check if an extra password is needed too
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if(strpos($icalvc->auth,'passw') !== false)
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{
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//extra parameter password authentication demanded
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//so exit if pw parameter is not valid
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if((!isset($_GET['password'])) ||
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(!$icalvc->pw !== $_GET['password']))
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{
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error_log('icalsrv.php:' . $cnmsg . ' demands extra password parameter');
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fail_exit($cnmsg . ' demands extra password parameter', '403');
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}
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}
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// now we are authenticated enough
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// go setup import and export mode in our ical virtual calendar
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$icalvc->uid_mapping_export = $uid_export_mode;
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$icalvc->uid_mapping_import = $uid_import_mode;
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$icalvc->reimport_missing_elements = $reimport_missing_elements;
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$logmsg = "";
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// oke now process the actual import or export to/from icalvc..
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if($_SERVER['REQUEST_METHOD'] == 'PUT')
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{
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// *** PUT Request so do an Import *************
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if($isdebug)
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{
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error_log('icalsrv.php: importing, by user:' .$GLOBALS['egw_info']['user']['account_id']
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. ' for virtual calendar of: ' . $reqvircal_owner_id);
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}
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// check if importing in not owned calendars is disabled
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if($reqvircal_owner_id
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&& ($GLOBALS['egw_info']['user']['account_id'] !== $reqvircal_owner_id))
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{
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if($disable_nonowner_import)
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{
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error_log('icalsrv.php: importing in non owner calendars currently disabled');
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fail_exit('importing in non owner calendars currently disabled', '403');
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}
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}
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if(isset($reqvircal_owner_id) && ($reqvircal_owner_id < 0))
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{
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error_log('icalsrv.php: importing in group calendars not allowed');
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fail_exit('importing in groupcalendars is not allowed', '403');
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}
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// I0 read the payload
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$logmsg = 'IMPORTING in '. $importMode . ' mode';
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$fpput = fopen("php://input", "r");
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$vcalstr = "";
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while($data = fread($fpput, 1024))
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{
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$vcalstr .= $data;
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}
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fclose($fpput);
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// import the icaldata into the virtual calendar
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// note: ProductType is auto derived from $vcalstr
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$import_table =& $icalvc->import_vcal($vcalstr);
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// count the successes..
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if($import_table === false)
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{
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$msg = 'icalsrv.php: importing '. $cnmsg . ' ERRORS';
|
|
fail_exit($msg,'403');
|
|
}
|
|
else
|
|
{
|
|
$logmsg .= "\n imported " . $cnmsg . ' : ';
|
|
foreach($import_table as $rsc_class => $vids)
|
|
{
|
|
$logmsg .= "\n resource: " . $rsc_class . ' : ' . count($vids) .' elements OK';
|
|
}
|
|
}
|
|
// DONE importing
|
|
if($logdir)
|
|
{
|
|
log_ical($logmsg,"import",$vcalstr);
|
|
}
|
|
|
|
// handle response ...
|
|
$GLOBALS['egw']->common->egw_exit();
|
|
}
|
|
else
|
|
{
|
|
// *** GET (or POST?) Request so do an export
|
|
$logmsg = 'EXPORTING';
|
|
// derive a ProductType from our http Agent and set it in icalvc
|
|
$icalvc->deviceType = icalsrv_resourcehandler::httpUserAgent2deviceType($reqagent);
|
|
|
|
// export the data from the virtual calendar
|
|
$vcalstr = $icalvc->export_vcal();
|
|
|
|
// handle response
|
|
if($vcalstr === false)
|
|
{
|
|
$msg = 'icalsrv.php: exporting '. $cnmsg . ' ERRORS';
|
|
fail_exit($msg,'403');
|
|
}
|
|
else
|
|
{
|
|
$logmsg .= "\n exported " . $cnmsg ." : OK ";
|
|
}
|
|
// DONE exporting
|
|
|
|
if($logdir) log_ical($logmsg,"export",$vcalstr);
|
|
// handle response ...
|
|
$content_type = icalsrv_resourcehandler::deviceType2contentType($icalvc->deviceType);
|
|
if($content_type)
|
|
{
|
|
header($content_type);
|
|
}
|
|
echo $vcalstr;
|
|
$GLOBALS['egw']->common->egw_exit();
|
|
}
|
|
|
|
// // --- SOME UTILITY FUNCTIONS -------
|
|
|
|
/**
|
|
* Exit with an error message in html
|
|
* @param $msg string
|
|
* message that gets return as html error description
|
|
*/
|
|
function fail_exit($msg, $errno = '403')
|
|
{
|
|
// log the error in the http server error logging files
|
|
error_log('resp: ' . $errno . ' ' . $msg);
|
|
// return http error $errno can this be done this way?
|
|
header('HTTP/1.1 '. $errno . ' ' . $msg);
|
|
# header('HTTP/1.1 403 ' . $msg);
|
|
ob_flush();
|
|
flush();
|
|
$GLOBALS['egw']->common->egw_exit();
|
|
}
|
|
|
|
/*
|
|
* Log info and data to logfiles if logging is set
|
|
*
|
|
* @param $msg string with loginfo
|
|
* @param $data data to be logged
|
|
* @param $icalmethod $string value can be import or export
|
|
* @global $logdir string/boolean log directory. Set to false to disab logging
|
|
*/
|
|
function log_ical($msg,$icalmethod="data",$data)
|
|
{
|
|
global $logdir;
|
|
if(!$logdir) return; // loggin seems off
|
|
|
|
// some info used for logging
|
|
$logstamp = date("U");
|
|
$loguser = $_SERVER['PHP_AUTH_USER'];
|
|
$logdate = date("Ymd:His");
|
|
// filename for log info, only used when logging is on
|
|
$fnloginfo = "$logdir/ical.log";
|
|
|
|
// log info
|
|
$fnlogdata = $logdir . "/ical." . $icalmethod . '.' . $logstamp . ".ics";
|
|
$fp = fopen("$fnloginfo",'a+');
|
|
fwrite($fp,"\n\n$loguser on $logdate : $msg, \n data in $fnlogdata ");
|
|
fclose($fp);
|
|
// log data
|
|
$fp = fopen("$fnlogdata", "w");
|
|
fputs($fp, $data);
|
|
fclose($fp);
|
|
}
|
|
?>
|