#345 - Rename downloader to filedownloader and add support for

cache query parameter

The cache query parameter allows to define the max-age in
seconds.

code/site/components/com_pages/event/subscriber/filedownloader.php

@@ -0,0 +1,76 @@
+<?php
+/**
+ * Joomlatools Pages
+ *
+ * @copyright   Copyright (C) 2018 Johan Janssens and Timble CVBA. (http://www.timble.net)
+ * @license     GNU GPLv3 <http://www.gnu.org/licenses/gpl.html>
+ * @link        https://github.com/joomlatools/joomlatools-pages for the canonical source repository
+ */
+
+class ComPagesEventSubscriberFiledownloader extends ComPagesEventSubscriberAbstract
+{
+    protected function _initialize(KObjectConfig $config)
+    {
+        $config->append(array(
+            'priority' => KEvent::PRIORITY_HIGH,
+        ));
+
+        parent::_initialize($config);
+    }
+
+    public function onAfterApplicationRoute(KEventInterface $event)
+    {
+        $request = $this->getObject('request');
+        $router  = $this->getObject('com://site/pages.dispatcher.router.file', ['request' => $request]);
+
+        if(false !== $route = $router->resolve())
+        {
+            //Set the location header
+            $dispatcher = $this->getObject('com://site/pages.dispatcher.http');
+            $response = $dispatcher->getResponse();
+
+            //Force download the file
+            if(isset($route->query['force-download']))
+            {
+                $request->query->set('force-download', true);
+                unset($route->query['force-download']);
+            }
+
+            //Attach a different transport [stream or sendfile]
+            if(isset($route->query['transport']))
+            {
+                $transport = $route->query['transport'];
+
+                //Enable using the header
+                if($transport == 'sendfile') {
+                    $response->getHeaders()->set('X-Sendfile', 1);
+                }
+
+                $response->attachTransport($transport);
+
+                unset($route->query['transport']);
+            }
+
+            //Set the cache time
+            if(isset($route->query['cache']) && ctype_alnum($route->query['cache']))
+            {
+                $response->setMaxAge($route->query['cache']);
+                unset($route->query['cache']);
+            }
+
+            //Qualify the route
+            $route = $router->qualify($route);
+
+            //Get the file path
+            $path = $route->getPath();
+
+            try {
+                $response->setContent($path, @mime_content_type($path) ??  'application/octet-stream');
+            } catch (InvalidArgumentException $e) {
+                throw new KControllerExceptionResourceNotFound('File not found');
+            }
+
+            $dispatcher->send();
+        }
+    }
+}

code/site/components/com_pages/resources/config/bootstrapper.php

@@ -64,7 +64,7 @@
             'subscribers' => [
                 'com://site/pages.event.subscriber.bootstrapper',
                 'com://site/pages.event.subscriber.redirector',
-                'com://site/pages.event.subscriber.downloader',
+                'com://site/pages.event.subscriber.filedownloader',
                 'com://site/pages.event.subscriber.dispatcher',
                 'com://site/pages.event.subscriber.pagedecorator',
                 'com://site/pages.event.subscriber.errorhandler',