From dda7c9142f61e0d54e2575eafef9c923e450e338 Mon Sep 17 00:00:00 2001
From: Ruakij <ruakij@ruekov.eu>
Date: Sat, 22 Jul 2023 12:31:39 +0200
Subject: [PATCH] Cancel and return failure when user aborted connection

---
 src/ZipStreamer.php | 10 ++++++++++
 1 file changed, 10 insertions(+)

diff --git a/src/ZipStreamer.php b/src/ZipStreamer.php
index 03ac56b..aaf6c0f 100644
--- a/src/ZipStreamer.php
+++ b/src/ZipStreamer.php
@@ -211,6 +211,10 @@ public function addFileFromStream($stream, $filePath, $options = NULL) {
 
     list($gpFlags, $lfhLength) = $this->beginFile($filePath, False, $options['comment'], $options['timestamp'], $gpFlags, $options['compress']);
     list($dataLength, $gzLength, $dataCRC32) = $this->streamFileData($stream, $options['compress'], $options['level']);
+    if($dataLength === 0) {
+      // Handle invalid result
+      return false;
+    }
 
     $ddLength = $this->addDataDescriptor($dataLength, $gzLength, $dataCRC32);
 
@@ -366,6 +370,12 @@ private function streamFileData($stream, $compress, $level) {
       $this->write($data);
 
       $this->flush();
+
+      // Before potentially reading the next chunk, check if user aborted the connection.
+      // Ignored (not aborted), when ignore_user_abort is set.
+      if (connection_aborted() === 1 && ignore_user_abort() === 0) {
+        return array(0, 0, 0);
+      }
     }
     if (COMPR::DEFLATE === $compress) {
       $data = $compStream->finish();