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<?php
/**
* StatusNet - the distributed open-source microblogging tool
* Copyright (C) 2010, StatusNet, Inc.
*
* A sample module to show best practices for StatusNet plugins
*
* 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/>.
*
* @package StatusNet
* @author James Walker <james@status.net>
* @copyright 2010 StatusNet, Inc.
* @license http://www.fsf.org/licensing/licenses/agpl-3.0.html AGPL 3.0
* @link http://status.net/
*/
class Salmon
{
const NS_REPLIES = "http://salmon-protocol.org/ns/salmon-replies";
const NS_MENTIONS = "http://salmon-protocol.org/ns/salmon-mention";
/**
* Sign and post the given Atom entry as a Salmon message.
*
* @fixme pass through the actor for signing?
*
* @param string $endpoint_uri
* @param string $xml
* @return boolean success
*/
public function post($endpoint_uri, $xml, $actor)
{
if (empty($endpoint_uri)) {
return false;
}
try {
$xml = $this->createMagicEnv($xml, $actor);
} catch (Exception $e) {
common_log(LOG_ERR, "Salmon unable to sign: " . $e->getMessage());
return false;
}
$headers = array('Content-Type: application/magic-envelope+xml');
try {
$client = new HTTPClient();
$client->setBody($xml);
$response = $client->post($endpoint_uri, $headers);
} catch (HTTP_Request2_Exception $e) {
common_log(LOG_ERR, "Salmon post to $endpoint_uri failed: " . $e->getMessage());
return false;
}
if ($response->getStatus() != 200) {
common_log(LOG_ERR, "Salmon at $endpoint_uri returned status " .
$response->getStatus() . ': ' . $response->getBody());
return false;
}
return true;
}
public function createMagicEnv($text, $actor)
{
$magic_env = new MagicEnvelope();
$user = User::staticGet('id', $actor->id);
if ($user->id) {
// Use local key
$magickey = Magicsig::staticGet('user_id', $user->id);
if (!$magickey) {
// No keypair yet, let's generate one.
$magickey = new Magicsig();
$magickey->generate($user->id);
}
} else {
throw new Exception("Salmon invalid actor for signing");
}
try {
$env = $magic_env->signMessage($text, 'application/atom+xml', $magickey->toString());
} catch (Exception $e) {
return $text;
}
return $magic_env->toXML($env);
}
public function verifyMagicEnv($text)
{
$magic_env = new MagicEnvelope();
$env = $magic_env->parse($text);
return $magic_env->verify($env);
}
}
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