From ad5015e706e82ccc30207c2d97ad50682b816ea7 Mon Sep 17 00:00:00 2001
From: bery <bery@drupaler.cz>
Date: Thu, 5 Jan 2017 15:07:07 +0100
Subject: [PATCH] Update PurgeCache.php

Additionally to PR https://github.com/magento/magento2/pull/7650, when Varnish cache sits behind an NGINX proxy, HTTP code 499 is returned unless socket stream waits for response (which should not have much of a performance impact due to nature of PURGE request)
---
 app/code/Magento/CacheInvalidate/Model/PurgeCache.php | 2 ++
 1 file changed, 2 insertions(+)

diff --git a/app/code/Magento/CacheInvalidate/Model/PurgeCache.php b/app/code/Magento/CacheInvalidate/Model/PurgeCache.php
index 22c008097f611..779deee4c28b5 100644
--- a/app/code/Magento/CacheInvalidate/Model/PurgeCache.php
+++ b/app/code/Magento/CacheInvalidate/Model/PurgeCache.php
@@ -58,6 +58,7 @@ public function sendPurgeRequest($tagsPattern)
         $headers = [self::HEADER_X_MAGENTO_TAGS_PATTERN => $tagsPattern];
         $socketAdapter->setOptions(['timeout' => 10]);
         foreach ($servers as $server) {
+            $headers['Host'] = $server->getHost();
             try {
                 $socketAdapter->connect($server->getHost(), $server->getPort());
                 $socketAdapter->write(
@@ -66,6 +67,7 @@ public function sendPurgeRequest($tagsPattern)
                     '1.1',
                     $headers
                 );
+                $socketAdapter->read();
                 $socketAdapter->close();
             } catch (\Exception $e) {
                 $this->logger->critical($e->getMessage(), compact('server', 'tagsPattern'));