gnu-social/plugins/Realtime/actions/keepalivechannel.php

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<?php
/**
* StatusNet - the distributed open-source microblogging tool
* Copyright (C) 2011, StatusNet, Inc.
*
* action periodically pinged by a page to keep a channel alive
*
* PHP version 5
*
* This program is free software: you can redistribute it and/or modify
* it under the terms of the GNU Affero General Public License as published by
* the Free Software Foundation, either version 3 of the License, or
* (at your option) any later version.
*
* This program 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 Affero General Public License for more details.
*
* You should have received a copy of the GNU Affero General Public License
* along with this program. If not, see <http://www.gnu.org/licenses/>.
*
* @category Realtime
* @package StatusNet
* @author Evan Prodromou <evan@status.net>
* @copyright 2011 StatusNet, Inc.
* @license http://www.fsf.org/licensing/licenses/agpl-3.0.html AGPL 3.0
* @link http://status.net/
*/
if (!defined('STATUSNET')) {
// This check helps protect against security problems;
// your code file can't be executed directly from the web.
exit(1);
}
/**
* Action periodically pinged by a page to keep a channel alive
*
* @category Realtime
* @package StatusNet
* @author Evan Prodromou <evan@status.net>
* @copyright 2011 StatusNet, Inc.
* @license http://www.fsf.org/licensing/licenses/agpl-3.0.html AGPL 3.0
* @link http://status.net/
*/
class KeepalivechannelAction extends Action
{
protected $channelKey = null;
protected $channel = null;
/**
* For initializing members of the class.
*
* @param array $argarray misc. arguments
*
* @return boolean true
*/
function prepare($argarray)
{
parent::prepare($argarray);
if (!$this->isPost()) {
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// TRANS: Client exception. Do not translate POST.
throw new ClientException(_m('You have to POST it.'));
}
$this->channelKey = $this->trimmed('channelkey');
if (empty($this->channelKey)) {
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// TRANS: Client exception thrown when the channel key argument is missing.
throw new ClientException(_m('No channel key argument.'));
}
$this->channel = Realtime_channel::getKV('channel_key', $this->channelKey);
if (empty($this->channel)) {
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// TRANS: Client exception thrown when referring to a non-existing channel.
throw new ClientException(_m('No such channel.'));
}
return true;
}
/**
* Handler method
*
* @param array $argarray is ignored since it's now passed in in prepare()
*
* @return void
*/
function handle($argarray=null)
{
$this->channel->touch();
header('HTTP/1.1 204 No Content');
return;
}
/**
* Return true if read only.
*
* MAY override
*
* @param array $args other arguments
*
* @return boolean is read only action?
*/
function isReadOnly($args)
{
return false;
}
}