public function getContent($file)
    {
        $this->fileInfo = GeneralUtility::makeInstance(Fileinfo::class);
        $this->fileInfo->setFile($file);

        // get PDF informations
        if (!$pdfInfo = $this->getPdfInfo($file)) {
            return false;
        }

        // proceed only of there are any pages found
        if ((int)$pdfInfo['pages'] && $this->isAppArraySet) {
            // create the tempfile which will contain the content
            $tempFileName = GeneralUtility::tempnam('pdf_files-Indexer');

            // Delete if exists, just to be safe.
            @unlink($tempFileName);

            // generate and execute the pdftotext commandline tool
            $fileEscaped = CommandUtility::escapeShellArgument($file);
            $cmd = "{$this->app['pdftotext']} -enc UTF-8 -q $fileEscaped $tempFileName";

            CommandUtility::exec($cmd);

            // check if the tempFile was successfully created
            if (@is_file($tempFileName)) {
                $content = GeneralUtility::getUrl($tempFileName);
                unlink($tempFileName);
            } else {
                $errorMessage = 'Content for file ' . $file . ' could not be extracted. Maybe it is encrypted?';
                $this->pObj->logger->warning($errorMessage);
                $this->addError($errorMessage);

                // return empty string if no content was found
                $content = '';
            }

            return $this->removeEndJunk($content);
        } else {
            return false;
        }
    }