private function write_cache_tmpfile($cfile, $files, CacheRenderHandler $rh)
{
$tmpfile = tempnam(dirname($cfile), $cfile);
$fhc = @fopen($tmpfile, 'w+');
if (!$fhc) {
trigger_error("Cannot write to temporary file: {$tmpfile}", E_USER_WARNING);
return null;
}
if ($rh->getConfig()->get('write_headers')) {
$rh->writeHeader($fhc, $files);
}
$res = true;
$merge = !!$rh->getConfig()->get('merge_tags');
if ($merge) {
$rh->startWrite();
}
foreach ($files as $file) {
try {
$rh->processFile($fhc, $file);
} catch (\Exception $e) {
trigger_error(sprintf("Exception %s while processing %s:\n\n%s", get_class($e), $file['file'], $e->getMessage()), E_USER_WARNING);
$res = false;
break;
}
}
if ($merge) {
$rh->endWrite($fhc);
}
fclose($fhc);
return $res ? $tmpfile : null;
}
private function write_cache($cfile, $files, CacheRenderHandler $rh)
{
$lockfile = $cfile . ".lock";
$fhl = @fopen($lockfile, 'w');
if (!$fhl) {
trigger_error("Cannot create cache-lockfile: {$lockfile}", E_USER_WARNING);
return false;
}
$wb = false;
if (!@flock($fhl, LOCK_EX | LOCK_NB, $wb)) {
trigger_error("Canot lock cache-lockfile: {$lockfile}", E_USER_WARNING);
return false;
}
if ($wb) {
// another process is writing the cache. Let's just return false
// the caller will leave the CSS unaltered
return false;
}
$fhc = @fopen($cfile, 'w+');
if (!$fhc) {
trigger_error("Cannot open cache file: {$cfile}", E_USER_WARNING);
fclose($fhl);
unlink($lockfile);
return false;
}
if ($rh->getConfig()->get('write_headers')) {
$rh->writeHeader($fhc, $files);
}
$res = true;
foreach ($files as $file) {
try {
$rh->processFile($fhc, $file);
} catch (\Exception $e) {
trigger_error(sprintf("Exception %s while processing %s:\n\n%s", get_class($e), $file['file'], $e->getMessage()), E_USER_WARNING);
$res = false;
break;
}
}
$ts = time();
if (function_exists('gzencode')) {
$enc = "{$cfile}.gz";
fseek($fhc, 0, SEEK_SET);
file_put_contents($enc, gzencode(stream_get_contents($fhc), 9));
touch($enc, $ts);
}
fclose($fhc);
touch($cfile, $ts);
fclose($fhl);
unlink($lockfile);
return $res;
}