Friendica Communications Platform (please note that this is a clone of the repository at github, issues are handled there) https://friendi.ca
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<?php
require_once('include/items.php');
require_once('include/auth.php');
function dfrn_poll_init(&$a) {
$dfrn_id = '';
if(x($_GET,'dfrn_id'))
$dfrn_id = $a->config['dfrn_poll_dfrn_id'] = $_GET['dfrn_id'];
if(x($_GET,'type'))
$type = $a->config['dfrn_poll_type'] = $_GET['type'];
if(x($_GET,'last_update'))
$last_update = $a->config['dfrn_poll_last_update'] = $_GET['last_update'];
if(($dfrn_id == '') && (! x($_POST,'dfrn_id')) && ($a->argc > 1)) {
$o = get_feed_for($a,'*', $a->argv[1],$last_update);
echo $o;
killme();
}
if((x($type)) && ($type == 'profile')) {
$r = q("SELECT `contact`.*, `user`.`nickname`
FROM `contact` LEFT JOIN `user` ON `contact`.`uid` = `user`.`uid`
WHERE `issued-id` = '%s' LIMIT 1",
dbesc($dfrn_id));
if(count($r)) {
$s = fetch_url($r[0]['poll'] . '?dfrn_id=' . $dfrn_id . '&type=profile-check');
if(strlen($s)) {
$xml = simplexml_load_string($s);
if((int) $xml->status == 1) {
$_SESSION['authenticated'] = 1;
$_SESSION['visitor_id'] = $r[0]['id'];
$_SESSION['sysmsg'] .= "Hi {$r[0]['name']}" . EOL;
// Visitors get 1 day session.
$session_id = session_id();
$expire = time() + 86400;
q("UPDATE `session` SET `expire` = '%s' WHERE `sid` = '%s' LIMIT 1",
dbesc($expire),
dbesc($session_id));
}
}
$profile = ((strlen($r[0]['nickname'])) ? $r[0]['nickname'] : $r[0]['uid']);
goaway($a->get_baseurl() . "/profile/$profile/visit");
}
goaway($a->get_baseurl());
}
if((x($type)) && ($type == 'profile-check')) {
q("DELETE FROM `profile_check` WHERE `expire` < " . intval(time()));
$r = q("SELECT * FROM `profile_check` WHERE `dfrn_id` = '%s' ORDER BY `expire` DESC",
dbesc($dfrn_id));
if(count($r))
xml_status(1);
xml_status(0);
return; // NOTREACHED
}
}
function dfrn_poll_post(&$a) {
$dfrn_id = notags(trim($_POST['dfrn_id']));
$challenge = notags(trim($_POST['challenge']));
$url = $_POST['url'];
$r = q("SELECT * FROM `challenge` WHERE `dfrn-id` = '%s' AND `challenge` = '%s' LIMIT 1",
dbesc($dfrn_id),
dbesc($challenge)
);
if(! count($r))
killme();
$type = $r[0]['type'];
$last_update = $r[0]['last_update'];
$r = q("DELETE FROM `challenge` WHERE `dfrn-id` = '%s' AND `challenge` = '%s' LIMIT 1",
dbesc($dfrn_id),
dbesc($challenge)
);
$r = q("SELECT * FROM `contact` WHERE `issued-id` = '%s' LIMIT 1",
dbesc($dfrn_id)
);
if(! count($r))
killme();
$owner_uid = $r[0]['uid'];
$contact_id = $r[0]['id'];
if($type == 'reputation' && strlen($url)) {
$r = q("SELECT * FROM `contact` WHERE `url` = '%s' AND `uid` = %d LIMIT 1",
dbesc($url),
intval($owner_uid)
);
$reputation = 0;
$text = '';
if(count($r)) {
$reputation = $r[0]['rating'];
$text = $r[0]['reason'];
if($r[0]['id'] == $contact_id) { // inquiring about own reputation not allowed
$reputation = 0;
$text = '';
}
}
echo "<?xml version=\"1.0\" encoding=\"UTF-8\"?>
<reputation>
<url>$url</url>
<rating>$reputation</rating>
<description>$text</description>
</reputation>
";
killme();
return; // NOTREACHED
}
else {
$o = get_feed_for($a,$dfrn_id, $a->argv[1], $last_update);
echo $o;
killme();
}
}
function dfrn_poll_content(&$a) {
$dfrn_id = '';
$type = 'data';
if(x($_GET,'dfrn_id'))
$dfrn_id = $a->config['dfrn_poll_dfrn_id'] = $_GET['dfrn_id'];
if(x($_GET,'type'))
$type = $a->config['dfrn_poll_type'] = $_GET['type'];
if(x($_GET,'last_update'))
$last_update = $a->config['dfrn_poll_last_update'] = $_GET['last_update'];
if($dfrn_id != '') {
// initial communication from external contact
$hash = random_string();
$status = 0;
$r = q("DELETE FROM `challenge` WHERE `expire` < " . intval(time()));
$r = q("INSERT INTO `challenge` ( `challenge`, `dfrn-id`, `expire` , `type`, `last_update` )
VALUES( '%s', '%s', '%s', '%s', '%s' ) ",
dbesc($hash),
dbesc(notags(trim($_GET['dfrn_id']))),
intval(time() + 60 ),
dbesc($type),
dbesc($last_update)
);
$r = q("SELECT * FROM `contact` WHERE `issued-id` = '%s' AND `blocked` = 0 AND `pending` = 0 LIMIT 1",
dbesc($_GET['dfrn_id']));
if((! count($r)) || (! strlen($r[0]['prvkey'])))
$status = 1;
$challenge = '';
openssl_private_encrypt($hash,$challenge,$r[0]['prvkey']);
$challenge = bin2hex($challenge);
$encrypted_id = '';
$id_str = $_GET['dfrn_id'] . '.' . mt_rand(1000,9999);
openssl_private_encrypt($id_str,$encrypted_id,$r[0]['prvkey']);
$encrypted_id = bin2hex($encrypted_id);
echo '<?xml version="1.0" encoding="UTF-8"?><dfrn_poll><status>' .$status . '</status><dfrn_id>' . $encrypted_id . '</dfrn_id>'
. '<challenge>' . $challenge . '</challenge></dfrn_poll>' . "\r\n" ;
session_write_close();
exit;
}
}