Vary accept encoding header html

Исправляем заголовок Vary: Accept-Encoding!

В данной статье мы расскажем, что необходимо сделать, если на сервере со связкой apache+nginx Вы получили низкую оценку «Vary: Accept-Encoding».

Заголовок Vary Accept-Encoding информирует проксирующий сервер, что необходимо сжать ресурс: как сжатую так и не сжатую версию сайта. Это способствует обхождению разного рода проблем при работе с прокси-серверами. Некоторые из них не принимают присутствие заголовка Content-Encoding.

Нам необходимо включить сжатие с помощью gzip. Для этого нам необходимо зайти в конфиг nginx /etc/nginx/nginx.conf и прописать след. значение:

 gzip on; # Активируем кэширование с помощью gzip. gzip_comp_level 5; # Устанавливаем степень сжатия, в нашем случаем это 5. gzip_vary on; # Оставляем выдачу ответа "Vary: Accept-Encoding". gzip_static off; # Не разрешаем прочитать сжатый файл. gzip_types text/css text/plain application/json application/x-javascript text/xml application/xml application/xml+rss text/javascript application/javascript text/x-js; # Указываем расширения файлов, которые будут подвергаться кэшированию. gzip_proxied any; # Разрешаем сжатие для всех проксированных запросов.

  Header append Vary: Accept-Encoding  

Данный файл (.htaccess) находится в корневой папке Вашего сайта.

После этих действий перезагружаем apache и nginx, проверяем результат.

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Исправляем предупреждение «Specify a Vary: Accept-Encoding Header»

Используя сервисы определения скорости сайта: Pingdom, GTmetrix или Google Pagespeed Insights вы можете увидите не совсем понятное предупреждение «Specify a Vary: Accept-Encoding Header«. Vary: Accept-Encoding — это HTTP заголовок, который который удостоверяется, что ваши ресурсы, сжатые gzip, будут приняты клиентом. Именно с отсутствием этого заголовка связанно предупреждение.

Исправляем «Specify a Vary: Accept-Encoding Header»

Заголовок Vary: Accept-Encoding в Apache

Чтобы добавить этого заголовок в Apache, добавьте следующий код в файл .htaccess через FTP или онлайн-файловый менеджер. Этот файл можно найти в корневой папке сервера.

Важно! Редактирование .htaccess может сломать ваш сайт. Если вы делаете это впервые, то рекомендую для начала почитать подробнее про этот файл или связаться со службой поддержки хостинга.

  Header append Vary: Accept-Encoding 

Заголовок Vary: Accept-Encoding в NGINX

Чтобы добавить заголовок в NGINX, добавьте следующий код в файл конфигурации. Все конфигурационные файлы NGINX находятся в каталоге /etc/nginx/. Основным конфигурационным файлом является /etc/nginx/nginx.conf.

sudo nano /etc/nginx/nginx.conf

В открывшемся файле ищем рубрику Compressin. Я предполагаю что у вас уже настроено и включено gzip сжатие. В этом случаи добавьте такую строку:

Затем проверьте правильность конфигураций и перезагрузите NGINX:

sudo service nginx configtest sudo service nginx restart

Если у вас нет доступа к серверу, то обратитесь в службу поддержки хостинга. На этом у меня все, оставляйте свои комментарии.

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How to Fix “Specify a Vary: Accept-Encoding” Header

Before we go about this problem’s problem-solution, let’s examine what this error is and where we can see a vary: accept-encoding header warning. This error is often a problem encountered with special web servers such as Apache and Nginx.

What is the Source of the “Specify a Vary: Accept-Encoding Header” Problem?

The accept-encoding header functions as the HTTP header with responses included on all source servers. This process’s main task is to understand by browsers that the website is using compressed versions.

When CDN or private servers do not use this header, they are likely to see the “Vary: Accept-Encoding” error. This will mean that websites on both systems are using uncompressed versions. While this process is not urgent or essential, it is useful for visitors’ speed performance to your site.

Where Can I Find This Problem?

The easiest way for website owners to find out if they have this error; They can access performance analysis using tools such as GTmetrix or Pingdom. Using such tools, you can see errors in your performance. If you have this title error, do not worry, we will tell you how the problem was solved in detail in our titles below.

Fixing “Specify a Vary: Accept-Encoding” Header

To add this header to Apache, add the following code to your .htaccess file via FTP or online file manager. This file can be found in the server root folder.

Important! Editing .htaccess can break your site. If you are doing this for the first time, you must first read more about this file or contact the hosting support service.

  Header append Vary: Accept-Encoding 

“Vary Header: Accept-Encoding” in NGINX

Here are the steps you need to take in Nginx

1. Add header. To add a header to NGINX, add the following code to your config file. All NGINX configuration files are discovered in the / etc / nginx / directory. The principal configuration file is /etc/nginx/nginx.conf. sudo nano /etc/nginx/nginx.conf
2. Find the compression heading. In the file that opens, try to find the compression heading. We will assume that you already have gzip compression configured and enabled. In this case, add a line like this: gzip_vary on
3. Check if your configurations are correct. Then check if your configurations are correct and restart NGINX: sudo service nginx configtest … sudo service nginx restart.

How to Fix “Specify a Vary: Accept-Encoding” Header in Short

One of the most critical issues for site owners and visitors is site performance. Therefore, you should eliminate the problems that affect your site performance. We have explained the solution of the “Specify a Vary: Accept-Encoding Header ” problem, which is one of these problems.

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When you apply the items we mentioned in our topic carefully, you can quickly solve Nginx or Apache servers’ errors. The most important thing is that when you use these codes on your server, add them carefully because an incorrect action could damage your server. Now that you know what this header means, you can head over to Google PageSpeed insights and start using it without having any difficulties.

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How to Fix “Specify a Vary: Accept-Encoding Header” Warning

Are you seeing the “Specify a Vary: Accept-Encoding Header” warning in Pingdom, GTmetrix, or Google PageSpeed Insights on your WordPress site? This is an HTTP header and should be included on every origin server response , as it tells the browser whether or not the client can handle compressed versions of the content. For example, let’s say you have an old browser without gzip compression and a modern browser with it. If you don’t utilize the Vary: Accept-Encoding header your web server or CDN could cache the uncompressed version and deliver that to the modern browser by mistake, which in turn hurts the performance of your WordPress site. By using the Vary: Accept-Encoding header you can ensure that your web server and or CDN delivers the appropriate version. Depending upon the tool or software reporting it, the warning might appear in a couple different ways:

• “Specify a Vary: Accept-Encoding Header”
• The following publicly cacheable, compressible resources should have a “vary: accept-encoding” header

Follow the steps below on how to fix the “Specify a Vary: Accept-Encoding Header” warning.

Fix “Specify a Vary: Accept-Encoding Header” Warning

The first thing that is important to note about this warning is that you can only fix this for requests that are on your server . If you have 3rd party requests you are seeing this on, there is nothing you can do as you don’t have control over their web servers. Although feel free to share this article with them. The Vary: Accept-Encoding header is added by default on all Kinsta servers (as seen below), so if you are a Kinsta customer you won’t see ever see this warning and don’t have to worry about.

The header applies both to your WordPress assets and your original server request. For your assets, if you are using a CDN, many already apply the Vary: Accept-Encoding by default. KeyCDN, Cloudflare, and CloudFront all utilize this. A lot of WordPress caching plugins also add this.

If you are still needing to fix this, you will need to add some code to your server.

edit your .htaccess file with the Yoast SEO plugin if your permissions are set correctly.

Important! Editing your .htaccess file could break your site if not done correctly. If you are not comfortable doing this, please check with your web host first.

  Header append Vary: Accept-Encoding 

Fix “Specify a Vary: Accept-Encoding Header” in NGINX

To fix this in NGINX, add the following code to your config file. All NGINX configuration files are located in the /etc/nginx/ directory. The primary configuration file is /etc/nginx/nginx.conf .

Using the Vary: Accept-Encoding header can in fact help speed up your WordPress site as it will ensure you are using gzip compression. And if all goes well, and you don’t have any 3rd party requests that aren’t correctly using the header, you should see an improvement on your score with website speed test tools such as Pingdom (as seen below).

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