public static function determine_protocol($server_global, $wp_is_ssl)
{
$forwarded_proto = UBUtil::array_fetch($server_global, 'HTTP_X_FORWARDED_PROTO');
$request_scheme = UBUtil::array_fetch($server_global, 'REQUEST_SCHEME');
$script_uri = UBUtil::array_fetch($server_global, 'SCRIPT_URI');
$script_uri_scheme = parse_url($script_uri, PHP_URL_SCHEME);
$https = UBUtil::array_fetch($server_global, 'HTTPS', 'off');
// X-Forwarded-Proto should be respected first, as it is what the end
// user will see (if Wordpress is behind a load balancer).
if (UBHTTP::is_valid_protocol($forwarded_proto)) {
return $forwarded_proto . '://';
} elseif (UBHTTP::is_valid_protocol($request_scheme)) {
return $request_scheme . '://';
} elseif (UBHTTP::is_valid_protocol($script_uri_scheme)) {
return $script_uri_scheme . '://';
} elseif ($wp_is_ssl || !is_null($https) && $https !== 'off') {
return 'https://';
} else {
return 'http://';
}
}
