// Filters an iCalendar feed, removing events over a certain duration.
// Written specifically because I was tired of multi-day Facebook events
// crowding out other events on my iCal.
// Install the script on a web server that supports PHP with the cURL extension.
// To filter a Facebook feed, add the 'uid' and 'key' parameters to the URL
// (e.g., icalproxy.php?uid=X&key=Y). To filter another feed, specifiy an 'url'
// parameter instead (e.g., icalproxy.php?url=http:%2f%2fexample.com%2fical).
// By default, all events longer than 12 hours are removed from the calendar.
// If you'd like, you can change this number with the 'maxhrs' parameter.
// Copyright (c) 2009 Benjamin Ragheb
// Permission is hereby granted, free of charge, to any person obtaining a copy
// of this software and associated documentation files (the "Software"), to deal
// in the Software without restriction, including without limitation the rights
// to use, copy, modify, merge, publish, distribute, sublicense, and/or sell
// copies of the Software, and to permit persons to whom the Software is
// furnished to do so, subject to the following conditions:
//
// The above copyright notice and this permission notice shall be included in
// all copies or substantial portions of the Software.
//
// THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
// IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
// FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE
// AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
// LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
// OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN
// THE SOFTWARE.
define('SCRIPT_VERSION', '1.0');
define('DEFAULT_MAX_HOURS', 12);
// Allow the script to serve a download of itself.
if (isset($_REQUEST['getsrc'])) {
header('Content-type: text/plain');
readfile(__FILE__);
exit;
}
// Figure out the iCalendar URL.
if (isset($_REQUEST['url'])) {
$iCalendarURL = $_REQUEST['url'];
} elseif (isset($_REQUEST['uid']) && isset($_REQUEST['key'])) {
$uid = $_REQUEST['uid'];
$key = $_REQUEST['key'];
$iCalendarURL = 'http://www.facebook.com/ical/u.php?uid=' . $uid . '&key=' . $key;
}
// The maximum allowed event duration in hours, 12 by default.
if (is_numeric($_REQUEST['maxhrs'])) {
$eventMaxHours = $_REQUEST['maxhrs'];
} else {
$eventMaxHours = DEFAULT_MAX_HOURS;
}
if (preg_match('_^http(s?)://_', $iCalendarURL)) {
$ch = curl_init($iCalendarURL);
curl_setopt($ch, CURLOPT_RETURNTRANSFER, true);
$inputRaw = curl_exec($ch);
curl_close($ch);
} else {
header('Content-type: text/html');
?>
icalproxy
A script, in PHP, to remove events from an iCalendar if they exceed a specified duration.
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written by Benjamin Ragheb