/**
* Sets default proxy settings for outbound RestfulService connections
*
* @param string $proxy The URL of the proxy to use.
* @param int $port Proxy port
* @param string $user The proxy auth user name
* @param string $password The proxy auth password
* @param boolean $socks Set true to use socks5 proxy instead of http
*/
static function set_default_proxy($proxy, $port = 80, $user = "", $password = "", $socks = false) {
self::$default_proxy = array(
CURLOPT_PROXY => $proxy,
CURLOPT_PROXYUSERPWD => "{$user}:{$password}",
CURLOPT_PROXYPORT => $port,
CURLOPT_PROXYTYPE => ($socks ? CURLPROXY_SOCKS5 : CURLPROXY_HTTP)
);
}