Add default exception handler

src/App.php

@@ -576,6 +576,21 @@ public function execute(Route $route, Request $request): self
                 }
             }
         } catch (\Throwable $e) {
+            if (empty(self::$errors['*'])) { // If no error handler is set then add a default one.
+                self::$errors['*'][] = [
+                    'callback' => function (\Throwable $error, Response $response) {
+                        $response->setStatusCode(500);
+                        $response->json([
+                            'message' => $error->getMessage(),
+                            'stacktrace' => $error->getTrace()
+                        ]);
+                        \fwrite(STDERR, "\033[31mException: " . $error->getMessage() . "\033[0m\n");
+                        \fwrite(STDERR, "Stacktrace: \n" . $error->getTraceAsString() . "\n");
+                    },
+                    'resources' => ['error', 'response']
+                ];
+            }
+
             foreach ($groups as $group) {
                 foreach (self::$errors as $error) { // Group error hooks
                     /** @var Hook $error */

tests/e2e/Client.php

@@ -83,10 +83,6 @@ public function call(string $method, string $path = '', array $headers = [], arr
 
         $responseHeaders['status-code'] = $responseStatus;
 
-        if ($responseStatus === 500) {
-            echo 'Server error('.$method.': '.$path.'. Params: '.json_encode($params).'): '.json_encode($responseBody)."\n";
-        }
-
         return [
             'headers' => $responseHeaders,
             'body' => $responseBody

tests/e2e/ResponseTest.php

@@ -39,4 +39,16 @@ public function testRedirect()
         $response = $this->client->call(Client::METHOD_GET, '/redirect');
         $this->assertEquals('Hello World!', $response['body']);
     }
+
+    public function testException()
+    {
+        $response = $this->client->call(Client::METHOD_GET, '/exception');
+        $this->assertEquals(500, $response['headers']['status-code']);
+    }
+
+    public function testHandledException()
+    {
+        $response = $this->client->call(Client::METHOD_GET, '/handledException');
+        $this->assertEquals('Handled Exception.', $response['body']);
+    }
 }

tests/e2e/server.php

@@ -34,6 +34,26 @@
         $response->redirect('/');
     });
 
+App::get('/exception')
+    ->inject('response')
+    ->action(function($response) {
+        /** @var Utopia/Response $response */
+        throw new Exception('Exception!');
+    });
+
+App::get('/handledException')
+    ->inject('response')
+    ->action(function($response) {
+        /** @var Utopia/Response $response */
+
+        App::error(function ($error, $response) {
+            /** @var Utopia/Response $response */
+            $response->send('Handled Exception.');
+        }, ['error', 'response']);
+
+        throw new Exception('Exception!');
+    });
+
 $request    = new Request();
 $response   = new Response();