App install behind a Proxy

lib/private/installer.php

@@ -241,7 +241,7 @@ class OC_Installer{
 			if(!isset($data['href'])) {
 				throw new \Exception($l->t("No href specified when installing app from http"));
 			}
-			copy($data['href'], $path);
+			file_put_contents($path, \OC_Util::getUrlContent($data['href']));
 		}else{
 			if(!isset($data['path'])) {
 				throw new \Exception($l->t("No path specified when installing app from local file"));