Basic attachment download function.

app/Http/Controllers/AttachmentController.php

@@ -0,0 +1,47 @@
+<?php
+
+namespace FireflyIII\Http\Controllers;
+
+
+use FireflyIII\Helpers\Attachments\AttachmentHelperInterface;
+use FireflyIII\Models\Attachment;
+use Crypt;
+/**
+ * Class AttachmentController
+ *
+ * @package FireflyIII\Http\Controllers
+ */
+class AttachmentController extends Controller
+{
+
+    /**
+     * @param Attachment $attachment
+     */
+    public function download(Attachment $attachment, AttachmentHelperInterface $helper)
+    {
+
+        $file = $helper->getAttachmentLocation($attachment);
+        if (file_exists($file)) {
+
+            $quoted = sprintf('"%s"', addcslashes(basename($attachment->filename), '"\\'));
+
+            header('Content-Description: File Transfer');
+            header('Content-Type: application/octet-stream');
+            header('Content-Disposition: attachment; filename=' . $quoted);
+            header('Content-Transfer-Encoding: binary');
+            header('Connection: Keep-Alive');
+            header('Expires: 0');
+            header('Cache-Control: must-revalidate, post-check=0, pre-check=0');
+            header('Pragma: public');
+            header('Content-Length: ' . $attachment->size);
+
+            echo Crypt::decrypt(file_get_contents($file));
+
+        } else {
+            abort(404);
+        }
+
+
+    }
+
+}