From 45c6e888ebda16e446d36d27d47df974e3152190 Mon Sep 17 00:00:00 2001
From: Sebastian Kostka <derkostka@users.noreply.github.com>
Date: Mon, 12 Jun 2017 09:44:50 +0200
Subject: [PATCH] Work around 4GB file size limit at 32 Bit systems (#74)

Closes #77
---
 lib/Sapi.php | 10 +++++++++-
 1 file changed, 9 insertions(+), 1 deletion(-)

diff --git a/lib/Sapi.php b/lib/Sapi.php
index dd49913..a93ea1e 100644
--- a/lib/Sapi.php
+++ b/lib/Sapi.php
@@ -88,7 +88,15 @@ static function sendResponse(ResponseInterface $response) {
         if ($contentLength !== null) {
             $output = fopen('php://output', 'wb');
             if (is_resource($body) && get_resource_type($body) == 'stream') {
-                stream_copy_to_stream($body, $output, (int)$contentLength);
+                if (PHP_INT_SIZE !== 4){
+                    // use the dedicated function on 64 Bit systems
+                    stream_copy_to_stream($body, $output, $contentLength);  
+                } else {
+                    // workaround for 32 Bit systems to avoid stream_copy_to_stream
+                    while (!feof($body)) {
+                        fwrite($output, fread($body, 8192));    
+                    }   
+                }
             } else {
                 fwrite($output, $body, (int)$contentLength);
             }