X-Git-Url: http://source.bookstackapp.com/bookstack/blobdiff_plain/59da7666b5773a9b7063185d7585ed664d351062..refs/pull/5689/head:/app/Exceptions/Handler.php

diff --git a/app/Exceptions/Handler.php b/app/Exceptions/Handler.php
index 385720643..61e126327 100644
--- a/app/Exceptions/Handler.php
+++ b/app/Exceptions/Handler.php
@@ -9,7 +9,9 @@ use Illuminate\Foundation\Exceptions\Handler as ExceptionHandler;
 use Illuminate\Http\Exceptions\PostTooLargeException;
 use Illuminate\Http\JsonResponse;
 use Illuminate\Http\Request;
+use Illuminate\Http\Response;
 use Illuminate\Validation\ValidationException;
+use Symfony\Component\ErrorHandler\Error\FatalError;
 use Symfony\Component\HttpKernel\Exception\HttpExceptionInterface;
 use Throwable;
 
@@ -36,6 +38,15 @@ class Handler extends ExceptionHandler
         'password_confirmation',
     ];
 
+    /**
+     * A function to run upon out of memory.
+     * If it returns a response, that will be provided back to the request
+     * upon an out of memory event.
+     *
+     * @var ?callable(): ?Response
+     */
+    protected $onOutOfMemory = null;
+
     /**
      * Report or log an exception.
      *
@@ -60,6 +71,13 @@ class Handler extends ExceptionHandler
      */
     public function render($request, Throwable $e)
     {
+        if ($e instanceof FatalError && str_contains($e->getMessage(), 'bytes exhausted (tried to allocate') && $this->onOutOfMemory) {
+            $response = call_user_func($this->onOutOfMemory);
+            if ($response) {
+                return $response;
+            }
+        }
+
         if ($e instanceof PostTooLargeException) {
             $e = new NotifyException(trans('errors.server_post_limit'), '/', 413);
         }
@@ -71,6 +89,24 @@ class Handler extends ExceptionHandler
         return parent::render($request, $e);
     }
 
+    /**
+     * Provide a function to be called when an out of memory event occurs.
+     * If the callable returns a response, this response will be returned
+     * to the request upon error.
+     */
+    public function prepareForOutOfMemory(callable $onOutOfMemory)
+    {
+        $this->onOutOfMemory = $onOutOfMemory;
+    }
+
+    /**
+     * Forget the current out of memory handler, if existing.
+     */
+    public function forgetOutOfMemoryHandler()
+    {
+        $this->onOutOfMemory = null;
+    }
+
     /**
      * Check if the given request is an API request.
      */