From f239c07cacb3d77daa3e6226ddc15547ddbf4795 Mon Sep 17 00:00:00 2001
From: Sebastiaan Andeweg <seb@seblog.nl>
Date: Mon, 20 Jan 2020 17:50:38 +0100
Subject: [PATCH] [6.x] Fix memory usage on downloading large files (#31163)

* fix memory usage on downloading large files

* Update FilesystemAdapter.php

Co-authored-by: Taylor Otwell <taylor@laravel.com>
---
 src/Illuminate/Filesystem/FilesystemAdapter.php | 6 +++++-
 1 file changed, 5 insertions(+), 1 deletion(-)

diff --git a/src/Illuminate/Filesystem/FilesystemAdapter.php b/src/Illuminate/Filesystem/FilesystemAdapter.php
index 8057b219c8ae..f5eb6bfba074 100644
--- a/src/Illuminate/Filesystem/FilesystemAdapter.php
+++ b/src/Illuminate/Filesystem/FilesystemAdapter.php
@@ -162,7 +162,11 @@ public function response($path, $name = null, array $headers = [], $disposition
 
         $response->setCallback(function () use ($path) {
             $stream = $this->readStream($path);
-            fpassthru($stream);
+
+            while (! feof($stream)) {
+                echo fread($stream, 2048);
+            }
+
             fclose($stream);
         });