add middleware for manage download file

config/autoload/middleware-pipeline.global.php

@@ -42,7 +42,7 @@
                 Helper\ServerUrlMiddleware::class,
                 App\Middleware\AuthMiddleware::class,
             ],
-            'priority' => 10000,
+            'priority' => PHP_INT_MAX,
         ],
 
         'routing' => [

config/autoload/routes.global.php

@@ -31,5 +31,11 @@
             'middleware' => App\Action\ListAction::class,
             'allowed_methods' => ['GET'],
         ],
+        [
+            'name' => 'download',
+            'path' => '/download/{file:[_0-9a-zA-z\-]+\.\w{1,}}',
+            'middleware' => App\Action\DownloadAction::class,
+            'allowed_methods' => ['GET'],
+        ],
     ],
 ];

data/.gitignore

@@ -1,3 +1,3 @@
 *
 !.gitignore
-!users.db
+!users.db

src/App/Action/DownloadAction.php

@@ -0,0 +1,23 @@
+<?php
+
+namespace App\Action;
+
+use Psr\Http\Message\ResponseInterface;
+use Psr\Http\Message\ServerRequestInterface;
+
+class DownloadAction
+{
+    public function __invoke(ServerRequestInterface $request, ResponseInterface $response, callable $next = null)
+    {
+        $file='data'.$request->getUri()->getPath();
+        if(is_readable($file)){
+            return $response
+                ->write(file_get_contents($file))
+                ->withHeader('Content-Disposition','inline; filename="' . pathinfo($file,PATHINFO_BASENAME) . '"')
+                ->withHeader('Content-type',pathinfo($file,PATHINFO_EXTENSION))
+                ->withStatus(200);
+        }else{
+            return $next($request, $response);
+        }
+    }
+}