Remove Connection: keep-alive

Unacceptable performance.

Author: oleibman

CHANGELOG.md

@@ -21,11 +21,11 @@ and this project adheres to [Semantic Versioning](https://semver.org).
 
 ### Deprecated
 
-- Nothing yet.
+- Drawing::setIsUrl is unneeded. The property is set when setPath determines whether path is a url.
 
 ### Fixed
 
-- Nothing yet.
+-  More context options may be needed for http(s) image. [Php issue 17121](https://github.com/php/php-src/issues/17121) [PR #4276](https://github.com/PHPOffice/PhpSpreadsheet/pull/4276)
 
 ## 2024-12-08 - 3.6.0
 

src/PhpSpreadsheet/Worksheet/Drawing.php

@@ -117,7 +117,7 @@ public function setPath(string $path, bool $verifyFile = true, ?ZipArchive $zip
                     'http' => [
                         'user_agent' => 'Mozilla/5.0 (Macintosh; Intel Mac OS X 10_15_7) AppleWebKit/537.36 (KHTML, like Gecko) Chrome/131.0.0.0 Safari/537.36',
                         'header' => [
-                            'Connection: keep-alive',
+                            //'Connection: keep-alive', // unacceptable performance
                             // accept header used by chrome without image/webp
                             'Accept: text/html,application/xhtml+xml,application/xml;q=0.9,image/avif,image/apng,*/*;q=0.8,application/signed-exchange;v=b3;q=0.7',
                         ],