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vendor/nelmio/api-doc-bundle/Controller/YamlDocumentationController.php

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+<?php
+
+/*
+ * This file is part of the NelmioApiDocBundle package.
+ *
+ * (c) Nelmio
+ *
+ * For the full copyright and license information, please view the LICENSE
+ * file that was distributed with this source code.
+ */
+
+namespace Nelmio\ApiDocBundle\Controller;
+
+use InvalidArgumentException;
+use Nelmio\ApiDocBundle\Render\RenderOpenApi;
+use Symfony\Component\HttpFoundation\Request;
+use Symfony\Component\HttpFoundation\Response;
+use Symfony\Component\HttpKernel\Exception\BadRequestHttpException;
+
+final class YamlDocumentationController
+{
+    /**
+     * @var RenderOpenApi
+     */
+    private $renderOpenApi;
+
+    public function __construct(RenderOpenApi $renderOpenApi)
+    {
+        $this->renderOpenApi = $renderOpenApi;
+    }
+
+    public function __invoke(Request $request, $area = 'default')
+    {
+        try {
+            $response = new Response(
+                $this->renderOpenApi->renderFromRequest($request, RenderOpenApi::YAML, $area),
+                Response::HTTP_OK,
+                ['Content-Type' => 'text/x-yaml']
+            );
+
+            return $response->setCharset('UTF-8');
+        } catch (InvalidArgumentException $e) {
+            throw new BadRequestHttpException(sprintf('Area "%s" is not supported as it isn\'t defined in config.', $area));
+        }
+    }
+}