wip: starting point

src/Download/Action/Handler/Exception/RealDebridBadUrlException.php

@@ -0,0 +1,16 @@
+<?php
+
+namespace App\Download\Action\Handler\Exception;
+
+class RealDebridBadUrlException extends \Exception
+{
+    public function __construct(string $type)
+    {
+        $messages = [
+            'file_downloading' => 'This file appears to be Real Debrid\'s "Torrent is downloading..." video.',
+            'file_removed' => 'This file appears to be Real Debrid\'s "File is removed..." video.',
+        ];
+
+        parent::__construct($messages[$type]);
+    }
+}

src/Download/Framework/Controller/ApiController.php

@@ -2,8 +2,10 @@
 
 namespace App\Download\Framework\Controller;
 
+use App\Download\Action\Handler\Exception\RealDebridBadUrlException;
 use App\Download\Action\Input\DownloadMediaInput;
 use App\Download\Framework\Repository\DownloadRepository;
+use Psr\Log\LoggerInterface;
 use Symfony\Bundle\FrameworkBundle\Controller\AbstractController;
 use Symfony\Component\HttpFoundation\Request;
 use Symfony\Component\HttpFoundation\Response;
@@ -18,6 +20,7 @@ class ApiController extends AbstractController
         private DownloadRepository $downloadRepository,
         private MessageBusInterface $bus,
         private readonly HubInterface $hub,
+        private readonly LoggerInterface $logger,
     ) {}
 
     #[Route('/api/download', name: 'api_download', methods: ['POST'])]
@@ -25,6 +28,12 @@ class ApiController extends AbstractController
         Request $request,
         DownloadMediaInput $input,
     ): Response {
+        try {
+            $this->validateUrl($input->url);
+        } catch (RealDebridBadUrlException $e) {
+            return $this->json(['error' => $e->getMessage()]);
+        }
+
         $download = $this->downloadRepository->insert(
             $this->getUser(),
             $input->url,
@@ -56,4 +65,22 @@ class ApiController extends AbstractController
 
         return $this->json(['status' => 200, 'message' => 'Added to Queue']);
     }
+
+    private function validateUrl(string $url): bool
+    {
+        $knownLengths = [
+            '2119075' => 'file_removed', // 'File is removed by copyright owners' Real Debrid video
+            '1184727' => 'file_downloading', // 'Torrent is Downloading' Real Debrid video
+        ];
+
+        $contentLength = get_headers($url)['Content-Length'];
+
+        if (array_key_exists($contentLength, $knownLengths)) {
+            $exception = new RealDebridBadUrlException($knownLengths[$contentLength]);
+            $this->logger->error($exception->getMessage());
+            throw $exception;
+        }
+
+        return true;
+    }
 }