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<?php
/**
* Interface to the external rpc.
*/
class RPC
{
/**
* UDP socket used for communication with the rpc
* @var resource
*/
private static $sock = false;
private static function init()
{
if (self::$sock !== false)
return;
self::$sock = socket_create(AF_INET, SOCK_DGRAM, SOL_UDP);
socket_set_option(self::$sock, SOL_SOCKET, SO_RCVTIMEO, array('sec' => 0, 'usec' => 300000));
socket_set_option(self::$sock, SOL_SOCKET, SO_SNDTIMEO, array('sec' => 1, 'usec' => 0));
socket_connect(self::$sock, '127.0.0.1', 1333);
}
public static function submit($data)
{
self::init();
if (empty($data)) {
$data = '{}';
} else {
$data = json_encode($data);
}
$sent = socket_send(self::$sock, $data, strlen($data), 0);
if ($sent != strlen($data)) {
return 'RPC send error';
}
$reply = self::readReply();
if ($reply === false) {
return 'RPC receive error';
}
return $reply;
}
/**
* Read reply from socket.
*
* @return mixed read reply as astring, or error message
*/
private static function readReply()
{
for ($i = 0; $i < 3; ++$i) {
$bytes = socket_recvfrom(self::$sock, $buf, 90000, 0, $bla1, $bla2);
if ($bytes !== false)
return $buf;
}
return false;
}
}
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