Airship\Engine\Continuum\AutoUpdater::downloadUpdateFile PHP 메소드

    public function downloadUpdateFile(UpdateInfo $update, string $apiEndpoint = 'download') : UpdateFile
    {
        if ($this->localUpdateFile instanceof UpdateFile) {
            $this->log('Local update file used', LogLevel::DEBUG);
            return $this->localUpdateFile;
        }
        try {
            $version = $update->getVersion();
            $body = $this->hail->postReturnBody($update->getChannel() . API::get($apiEndpoint), ['type' => \get_class($this), 'supplier' => $update->getSupplierName(), 'package' => $update->getPackageName(), 'version' => $version]);
            $outFile = \Airship\tempnam('airship-', $this->ext);
            $saved = \file_put_contents($outFile, $body);
            if ($saved !== false) {
                // To prevent TOCTOU issues down the line
                $hash = Util::hash($body);
                $body = null;
                \clearstatcache();
                return new UpdateFile(['path' => $outFile, 'version' => $version, 'hash' => $hash, 'size' => \filesize($outFile)]);
            }
            // If we're still here...
            throw new TransferException();
        } catch (TransferException $ex) {
            $this->log('Automatic update failure.', LogLevel::WARNING, ['exception' => \Airship\throwableToArray($ex), 'channel' => $update->getChannel()]);
            // Rethrow it to prevent errors on return type
            throw $ex;
        }
    }