first commit

public/typo3conf/ext/off/Classes/Download/PdfEinreichung.php

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+<?php
+
+namespace HermannTelser\Zuladungsliste\Download;
+
+use TYPO3\CMS\Core\Database\ConnectionPool;
+use TYPO3\CMS\Core\Utility\GeneralUtility;
+use TYPO3\CMS\Core\Core\Environment;
+
+class PdfEinreichung
+{
+    /**
+     * @return array
+     */
+    public static function download()
+    {
+
+        $pdfname = GeneralUtility::_GP("pdf");
+        $userid = GeneralUtility::_GP("userid");
+        $file = Environment::getPublicPath() . "/uploads/tx_zuladungsliste/" . $userid . "/" . $pdfname;
+
+        echo $file;
+
+        if(file_exists($file)) {
+            header('Content-Description: File Transfer');
+            header('Content-Type: application/octet-stream');
+            header('Content-Disposition: attachment; filename='.basename($file));
+            header('Content-Transfer-Encoding: binary');
+            header('Expires: 0');
+            header('Cache-Control: must-revalidate, post-check=0, pre-check=0');
+            header('Pragma: public');
+            header('Content-Length: ' . filesize($file));
+            ob_clean();
+            flush();
+            readfile($file);
+        }
+        exit;
+    }
+}