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vendor/symfony/error-handler/ErrorRenderer/CliErrorRenderer.php

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+<?php
+
+/*
+ * This file is part of the Symfony package.
+ *
+ * (c) Fabien Potencier <fabien@symfony.com>
+ *
+ * For the full copyright and license information, please view the LICENSE
+ * file that was distributed with this source code.
+ */
+
+namespace Symfony\Component\ErrorHandler\ErrorRenderer;
+
+use Symfony\Component\ErrorHandler\Exception\FlattenException;
+use Symfony\Component\VarDumper\Cloner\VarCloner;
+use Symfony\Component\VarDumper\Dumper\CliDumper;
+
+// Help opcache.preload discover always-needed symbols
+class_exists(CliDumper::class);
+
+/**
+ * @author Nicolas Grekas <p@tchwork.com>
+ */
+class CliErrorRenderer implements ErrorRendererInterface
+{
+    /**
+     * {@inheritdoc}
+     */
+    public function render(\Throwable $exception): FlattenException
+    {
+        $cloner = new VarCloner();
+        $dumper = new class() extends CliDumper {
+            protected function supportsColors(): bool
+            {
+                $outputStream = $this->outputStream;
+                $this->outputStream = fopen('php://stdout', 'w');
+
+                try {
+                    return parent::supportsColors();
+                } finally {
+                    $this->outputStream = $outputStream;
+                }
+            }
+        };
+
+        return FlattenException::createFromThrowable($exception)
+            ->setAsString($dumper->dump($cloner->cloneVar($exception), true));
+    }
+}

vendor/symfony/error-handler/ErrorRenderer/ErrorRendererInterface.php

@@ -0,0 +1,27 @@
+<?php
+
+/*
+ * This file is part of the Symfony package.
+ *
+ * (c) Fabien Potencier <fabien@symfony.com>
+ *
+ * For the full copyright and license information, please view the LICENSE
+ * file that was distributed with this source code.
+ */
+
+namespace Symfony\Component\ErrorHandler\ErrorRenderer;
+
+use Symfony\Component\ErrorHandler\Exception\FlattenException;
+
+/**
+ * Formats an exception to be used as response content.
+ *
+ * @author Yonel Ceruto <yonelceruto@gmail.com>
+ */
+interface ErrorRendererInterface
+{
+    /**
+     * Renders a Throwable as a FlattenException.
+     */
+    public function render(\Throwable $exception): FlattenException;
+}

vendor/symfony/error-handler/ErrorRenderer/SerializerErrorRenderer.php

@@ -0,0 +1,92 @@
+<?php
+
+/*
+ * This file is part of the Symfony package.
+ *
+ * (c) Fabien Potencier <fabien@symfony.com>
+ *
+ * For the full copyright and license information, please view the LICENSE
+ * file that was distributed with this source code.
+ */
+
+namespace Symfony\Component\ErrorHandler\ErrorRenderer;
+
+use Symfony\Component\ErrorHandler\Exception\FlattenException;
+use Symfony\Component\HttpFoundation\Request;
+use Symfony\Component\HttpFoundation\RequestStack;
+use Symfony\Component\Serializer\Exception\NotEncodableValueException;
+use Symfony\Component\Serializer\SerializerInterface;
+
+/**
+ * Formats an exception using Serializer for rendering.
+ *
+ * @author Nicolas Grekas <p@tchwork.com>
+ */
+class SerializerErrorRenderer implements ErrorRendererInterface
+{
+    private $serializer;
+    private $format;
+    private $fallbackErrorRenderer;
+    private $debug;
+
+    /**
+     * @param string|callable(FlattenException) $format The format as a string or a callable that should return it
+     *                                                  formats not supported by Request::getMimeTypes() should be given as mime types
+     * @param bool|callable                     $debug  The debugging mode as a boolean or a callable that should return it
+     */
+    public function __construct(SerializerInterface $serializer, $format, ?ErrorRendererInterface $fallbackErrorRenderer = null, $debug = false)
+    {
+        if (!\is_string($format) && !\is_callable($format)) {
+            throw new \TypeError(sprintf('Argument 2 passed to "%s()" must be a string or a callable, "%s" given.', __METHOD__, \gettype($format)));
+        }
+
+        if (!\is_bool($debug) && !\is_callable($debug)) {
+            throw new \TypeError(sprintf('Argument 4 passed to "%s()" must be a boolean or a callable, "%s" given.', __METHOD__, \gettype($debug)));
+        }
+
+        $this->serializer = $serializer;
+        $this->format = $format;
+        $this->fallbackErrorRenderer = $fallbackErrorRenderer ?? new HtmlErrorRenderer();
+        $this->debug = $debug;
+    }
+
+    /**
+     * {@inheritdoc}
+     */
+    public function render(\Throwable $exception): FlattenException
+    {
+        $headers = ['Vary' => 'Accept'];
+        $debug = \is_bool($this->debug) ? $this->debug : ($this->debug)($exception);
+        if ($debug) {
+            $headers['X-Debug-Exception'] = rawurlencode(substr($exception->getMessage(), 0, 2000));
+            $headers['X-Debug-Exception-File'] = rawurlencode($exception->getFile()).':'.$exception->getLine();
+        }
+
+        $flattenException = FlattenException::createFromThrowable($exception, null, $headers);
+
+        try {
+            $format = \is_string($this->format) ? $this->format : ($this->format)($flattenException);
+            $headers['Content-Type'] = Request::getMimeTypes($format)[0] ?? $format;
+
+            $flattenException->setAsString($this->serializer->serialize($flattenException, $format, [
+                'exception' => $exception,
+                'debug' => $debug,
+            ]));
+        } catch (NotEncodableValueException $e) {
+            $flattenException = $this->fallbackErrorRenderer->render($exception);
+        }
+
+        return $flattenException->setHeaders($flattenException->getHeaders() + $headers);
+    }
+
+    public static function getPreferredFormat(RequestStack $requestStack): \Closure
+    {
+        return static function () use ($requestStack) {
+            if (!$request = $requestStack->getCurrentRequest()) {
+                throw new NotEncodableValueException();
+            }
+
+            return $request->getPreferredFormat();
+        };
+    }
+}