Merge pull request #469 from beyondcode/refactor/cors

[2.x] Per-app CORS

Author: rennokki

config/websockets.php

@@ -84,23 +84,12 @@
             'capacity' => null,
             'enable_client_messages' => false,
             'enable_statistics' => true,
+            'allowed_origins' => [
+                //
+            ],
         ],
     ],
 
-    /*
-    |--------------------------------------------------------------------------
-    | Allowed Origins
-    |--------------------------------------------------------------------------
-    |
-    | If not empty, you can whitelist certain origins that will be allowed
-    | to connect to the websocket server.
-    |
-    */
-
-    'allowed_origins' => [
-        //
-    ],
-
     /*
     |--------------------------------------------------------------------------
     | Maximum Request Size

docs/basic-usage/pusher.md

@@ -74,6 +74,7 @@ You may add additional apps in your `config/websockets.php` file.
         'capacity' => null,
         'enable_client_messages' => false,
         'enable_statistics' => true,
+        'allowed_origins' => [],
     ],
 ],
 ```

src/Apps/App.php

@@ -33,6 +33,9 @@ class App
     /** @var bool */
     public $statisticsEnabled = true;
 
+    /** @var array */
+    public $allowedOrigins = [];
+
     public static function findById($appId)
     {
         return app(AppManager::class)->findById($appId);
@@ -106,4 +109,11 @@ public function enableStatistics(bool $enabled = true)
 
         return $this;
     }
+
+    public function setAllowedOrigins(array $allowedOrigins)
+    {
+        $this->allowedOrigins = $allowedOrigins;
+
+        return $this;
+    }
 }

src/Apps/ConfigAppManager.php

@@ -78,7 +78,8 @@ protected function instantiate(?array $appAttributes): ?App
         $app
             ->enableClientMessages($appAttributes['enable_client_messages'])
             ->enableStatistics($appAttributes['enable_statistics'])
-            ->setCapacity($appAttributes['capacity'] ?? null);
+            ->setCapacity($appAttributes['capacity'] ?? null)
+            ->setAllowedOrigins($appAttributes['allowed_origins'] ?? []);
 
         return $app;
     }

src/Server/OriginCheck.php

@@ -79,11 +79,9 @@ public function createServer(): IoServer
             $socket = new SecureServer($socket, $this->loop, config('websockets.ssl'));
         }
 
-        $urlMatcher = new UrlMatcher($this->routes, new RequestContext);
-
-        $router = new Router($urlMatcher);
-
-        $app = new OriginCheck($router, config('websockets.allowed_origins', []));
+        $app = new Router(
+            new UrlMatcher($this->routes, new RequestContext)
+        );
 
         $httpServer = new HttpServer($app, config('websockets.max_request_size_in_kb') * 1024);
 

src/Server/WebSocketServerFactory.php

@@ -0,0 +1,12 @@
+<?php
+
+namespace BeyondCode\LaravelWebSockets\WebSockets\Exceptions;
+
+class OriginNotAllowed extends WebSocketException
+{
+    public function __construct(string $appKey)
+    {
+        $this->message = "The origin is not allowed for `{$appKey}`.";
+        $this->code = 4009;
+    }
+}

src/WebSockets/Exceptions/OriginNotAllowed.php

@@ -8,6 +8,7 @@
 use BeyondCode\LaravelWebSockets\QueryParameters;
 use BeyondCode\LaravelWebSockets\WebSockets\Channels\ChannelManager;
 use BeyondCode\LaravelWebSockets\WebSockets\Exceptions\ConnectionsOverCapacity;
+use BeyondCode\LaravelWebSockets\WebSockets\Exceptions\OriginNotAllowed;
 use BeyondCode\LaravelWebSockets\WebSockets\Exceptions\UnknownAppKey;
 use BeyondCode\LaravelWebSockets\WebSockets\Exceptions\WebSocketException;
 use BeyondCode\LaravelWebSockets\WebSockets\Messages\PusherMessageFactory;
@@ -30,6 +31,7 @@ public function onOpen(ConnectionInterface $connection)
     {
         $this
             ->verifyAppKey($connection)
+            ->verifyOrigin($connection)
             ->limitConcurrentConnections($connection)
             ->generateSocketId($connection)
             ->establishConnection($connection);
@@ -77,6 +79,23 @@ protected function verifyAppKey(ConnectionInterface $connection)
         return $this;
     }
 
+    protected function verifyOrigin(ConnectionInterface $connection)
+    {
+        if (! $connection->app->allowedOrigins) {
+            return $this;
+        }
+
+        $header = (string) ($connection->httpRequest->getHeader('Origin')[0] ?? null);
+
+        $origin = parse_url($header, PHP_URL_HOST) ?: $header;
+
+        if (! $header || ! in_array($origin, $connection->app->allowedOrigins)) {
+            throw new OriginNotAllowed($connection->app->key);
+        }
+
+        return $this;
+    }
+
     protected function limitConcurrentConnections(ConnectionInterface $connection)
     {
         if (! is_null($capacity = $connection->app->capacity)) {

src/WebSockets/WebSocketHandler.php

@@ -22,7 +22,7 @@ public function it_can_get_apps_from_the_config_file()
     {
         $apps = $this->appManager->all();
 
-        $this->assertCount(1, $apps);
+        $this->assertCount(2, $apps);
 
         /** @var $app */
         $app = $apps[0];

tests/ClientProviders/ConfigAppManagerTest.php

@@ -5,6 +5,7 @@
 use BeyondCode\LaravelWebSockets\Apps\App;
 use BeyondCode\LaravelWebSockets\Tests\Mocks\Message;
 use BeyondCode\LaravelWebSockets\WebSockets\Exceptions\ConnectionsOverCapacity;
+use BeyondCode\LaravelWebSockets\WebSockets\Exceptions\OriginNotAllowed;
 use BeyondCode\LaravelWebSockets\WebSockets\Exceptions\UnknownAppKey;
 
 class ConnectionTest extends TestCase
@@ -14,7 +15,7 @@ public function unknown_app_keys_can_not_connect()
     {
         $this->expectException(UnknownAppKey::class);
 
-        $this->pusherServer->onOpen($this->getWebSocketConnection('/?appKey=test'));
+        $this->pusherServer->onOpen($this->getWebSocketConnection('test'));
     }
 
     /** @test */
@@ -65,4 +66,38 @@ public function ping_returns_pong()
 
         $connection->assertSentEvent('pusher:pong');
     }
+
+    /** @test */
+    public function origin_validation_should_fail_for_no_origin()
+    {
+        $this->expectException(OriginNotAllowed::class);
+
+        $connection = $this->getWebSocketConnection('TestOrigin');
+
+        $this->pusherServer->onOpen($connection);
+
+        $connection->assertSentEvent('pusher:connection_established');
+    }
+
+    /** @test */
+    public function origin_validation_should_fail_for_wrong_origin()
+    {
+        $this->expectException(OriginNotAllowed::class);
+
+        $connection = $this->getWebSocketConnection('TestOrigin', ['Origin' => 'https://google.ro']);
+
+        $this->pusherServer->onOpen($connection);
+
+        $connection->assertSentEvent('pusher:connection_established');
+    }
+
+    /** @test */
+    public function origin_validation_should_pass_for_the_right_origin()
+    {
+        $connection = $this->getWebSocketConnection('TestOrigin', ['Origin' => 'https://test.origin.com']);
+
+        $this->pusherServer->onOpen($connection);
+
+        $connection->assertSentEvent('pusher:connection_established');
+    }
 }