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<?php
require_once "init.php";
require_once BASE . "/lib/mysql.php";
require_once BASE . "/lib/http.php";
$cutoff = 24*60*60;
if (array_key_exists('HTTPS',$_SERVER) && ($_SERVER['HTTPS']=='on'))
$protocol = 'https';
else
$protocol = 'http';
$ipv_filter = '';
if (filter_var($_SERVER['SERVER_ADDR'], FILTER_VALIDATE_IP, FILTER_FLAG_IPV4))
$ipv_filter .= ' AND `mirror_statuses`.`ipv4`';
if (filter_var($_SERVER['SERVER_ADDR'], FILTER_VALIDATE_IP, FILTER_FLAG_IPV6))
$ipv_filter .= ' AND `mirror_statuses`.`ipv6`';
$result = mysql_run_query(
'SELECT `mirror_statuses`.`url` FROM `mirror_statuses`' .
' WHERE `mirror_statuses`.`active`' .
' AND `mirror_statuses`.`last_sync` > UNIX_TIMESTAMP(NOW())-' . $cutoff .
' AND `mirror_statuses`.`start` > UNIX_TIMESTAMP(NOW())-' . $cutoff .
' AND `mirror_statuses`.`protocol` = "' . $protocol . '"' .
' AND `mirror_statuses`.`url` NOT LIKE "%.oss/%"' .
$ipv_filter .
' GROUP BY `mirror_statuses`.`url`' .
' ORDER BY SHA2(' .
'CONCAT(' .
'`mirror_statuses`.`url`,' .
'NOW(),' .
'"' . base64_encode(
$_SERVER['REMOTE_PORT'] . ' ' .
$_SERVER['REMOTE_ADDR']
) . '"' .
'),' .
'256' .
')' .
' LIMIT 1'
);
$mirror = $result -> fetch_assoc();
if (! array_key_exists('url',$mirror))
die_500('no mirror reachable');
$request_uri = $_SERVER['REQUEST_URI'];
if (substr($request_uri, 0, 1) == '/')
$request_uri = substr($request_uri, 1);
redirect_temporarily($mirror['url'] . $request_uri);
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