Return 403 when domain is not allowed

[baamenabar]

Currently only returning 500
Even if I try to exit with error code the framework seems to be catching me first.

public function saveNewFile($sourceFile, $newFileName, $options)
    {
        $newFilePath = TMP_DIR . $newFileName;
        try {
            $tmpFile = $this->saveToTemporaryFile($sourceFile);
        } catch (Exception $e) {
            http_response_code($e->getCode());
            exit($e->getMessage());
        }
        $commandStr = $this->generateCmdString($newFilePath, $tmpFile, $options);

        exec($commandStr, $output, $code);
        if (count($output) === 0) {
            $output = $code;
        } else {
            $output = implode(PHP_EOL, $output);
        }

        if ($code !== 0) {
            throw new \Exception($output . ' Command line: ' . $commandStr);
        }
        $this->filesystem->write($newFileName, stream_get_contents(fopen($newFilePath, 'r')));
        unlink($tmpFile);
        unlink($newFilePath);
    }

and then

public function saveToTemporaryFile($fileUrl)
    {
        //check restricted_domains is enabled
        if ($this->params['restricted_domains'] &&
            is_array($this->params['whitelist_domains']) &&
            !in_array(parse_url($fileUrl, PHP_URL_HOST), $this->params['whitelist_domains'])
        ) {
            throw  new \Exception('Restricted domains enabled, the domain your fetching from is not allowed: ' . parse_url($fileUrl, PHP_URL_HOST), 403);

        }

        if (!$resource = @fopen($fileUrl, "r")) {
            throw  new \Exception('Error occured while trying to read the file Url : ' . $fileUrl, 400);
        }
        $content = "";
        while ($line = fread($resource, 1024)) {
            $content .= $line;
        }
        $tmpFile = TMP_DIR . uniqid("", true);
        file_put_contents($tmpFile, $content);
        return $tmpFile;
    }

but it doesn't work

[sadok-f]

You missing \ in front of Exception,
catch (\Exception $e) {