htdocs/freebusy.php

   1 <?php
   2 require_once("./always.php");
   3 dbg_error_log( "freebusy", " User agent: %s", ((isset($_SERVER['HTTP_USER_AGENT']) ? $_SERVER['HTTP_USER_AGENT'] : "Unfortunately Mulberry and Chandler don't send a 'User-agent' header with their requests :-(")) );
   4 dbg_log_array( "headers", '_SERVER', $_SERVER, true );
   5 if ( isset($c->public_freebusy_url) && $c->public_freebusy_url ) {
   6   require_once("PublicSession.php");
   7   $session = new PublicSession();
   8 }
   9 else {
  10   require_once("HTTPAuthSession.php");
  11   $session = new HTTPAuthSession();
  12 }
  13
  14
  15 /**
  16 * Submission parameters recommended by calconnect, plus some generous alternatives
  17 */
  18 param_to_global('fb_start', '#^[a-z0-9/:.,+-]+$#i', 'start', 'from');
  19 param_to_global('fb_end', '#^[a-z0-9/:.,+-]+$#i', 'end', 'until', 'finish', 'to');
  20 param_to_global('fb_period', '#^[+-]?P?(\d+[WD]?)(T(\d+H)?(\d+M)?(\d+S)?)?+$#', 'period');
  21 param_to_global('fb_format', '#^\S+/\S+$#', 'format');
  22 param_to_global('fb_user', '#^.*$#', 'user', 'userid', 'user_no', 'email');
  23 param_to_global('fb_token', '#^[a-z0-9+/-]+$#i', 'token');
  24
  25 if ( isset($fb_period) ) $fb_period = strtoupper($fb_period);
  26
  27 if ( !isset($fb_start) || $fb_start == '' )  $fb_start  = date('Y-m-d\TH:i:s', time() - 86400 ); // no recommended default.  -1 day
  28 if ( (!isset($fb_period) && !isset($fb_end)) || ($fb_period == '' && $fb_end == '') )
  29   $fb_period = 'P44D'; // 44 days - 2 days more than recommended default
  30
  31
  32 /**
  33 * If fb_user (user, userid, user_no or email parameter) then we adjust
  34 * the path of the request to suit.
  35 */
  36 if ( isset($fb_user) ) $_SERVER['PATH_INFO'] = '/'.$fb_user.'/';
  37
  38 /**
  39 * We also allow URLs like .../freebusy.php/user@example.com to work, so long as
  40 * the e-mail matches a single user whose calendar we have rights to.
  41 * @NOTE: It is OK for there to *be* duplicate e-mail addresses, just so long as we
  42 * only have read permission (or more) for only one of them.
  43 */
  44 require_once("CalDAVRequest.php");
  45 $request = new CalDAVRequest(array("allow_by_email" => 1));
  46 $path_match = '^'.$request->path;
  47 if ( preg_match( '{^/(\S+@[a-z0-9][a-z0-9-]*[.][a-z0-9.-]+)/?$}i', $request->path, $matches ) ) {
  48   $principal = new Principal('email',$matches[1]);
  49   $path_match = '^'.$principal->dav_name();
  50 }
  51
  52 if ( isset($fb_format) && $fb_format != 'text/calendar' ) {
  53   $request->DoResponse( 406, translate('This server only supports the text/calendar format for freebusy URLs') );
  54 }
  55
  56 if ( ! $request->HavePrivilegeTo('read-free-busy') ) $request->DoResponse( 404 );
  57
  58 require_once("freebusy-functions.php");
  59
  60 switch ( $_SERVER['REQUEST_METHOD'] ) {
  61   case 'GET':
  62     $range_start = new RepeatRuleDateTime($fb_start);
  63     if ( !isset($fb_end) ) {
  64       $range_end = clone($range_start);
  65       $range_end->modify($fb_period);
  66     }
  67     else {
  68       $range_end = new RepeatRuleDateTime($fb_end);
  69     }
  70     $freebusy = get_freebusy( $path_match, $range_start, $range_end );
  71
  72     $result = new iCalComponent();
  73     $result->VCalendar();
  74     $result->AddComponent($freebusy);
  75
  76     $request->DoResponse( 200, $result->Render(), 'text/calendar' );
  77     break;
  78
  79   default:
  80     dbg_error_log( "freebusy", "Unhandled request method >>%s<<", $_SERVER['REQUEST_METHOD'] );
  81     dbg_log_array( "freebusy", 'HEADERS', $raw_headers );
  82     dbg_log_array( "freebusy", '_SERVER', $_SERVER, true );
  83     @dbg_error_log( "freebusy", "RAW: %s", str_replace("\n", "",str_replace("\r", "", $request->raw_post)) );
  84 }
  85