# Possible gzip\_vary bug? (v1.5.1) **URL:** \ **Category:** NGINX\ **Created:** [June 19, 2013, 2:52pm UTC](https://www.ruby-forum.com/t/possible-gzip-vary-bug-v1-5-1/245574 "2013-06-19T14:52:48Z")\ **Posts on this page:** 3\ **Page:** 1
**Author:** ![Sadaf\_N](https://www.ruby-forum.com/letter_avatar_proxy/v4/letter/s/858c86/32.png) [@Sadaf\_N](https://www.ruby-forum.com/u/Sadaf_N)\ **Post date:** [June 19, 2013, 2:52pm UTC](https://www.ruby-forum.com/t/possible-gzip-vary-bug-v1-5-1/245574/1 "2013-06-19T14:52:48Z")
I’m running the latest development version of nginx and gzipping is working. But no Vary Accept-Encoding header is added to any gzip response. The gzip\_http\_version isn’t affecting the behavior, no matter if I set it to 1.0 or 1.1 no header is sent. Even if I add the header myself via the add\_header directive, nothing. If I use PHP to add the header it’s there. Any ideas what the problem could be? My configure options: [https://github.com/MovLib/www/blob/master/conf/install-scripts/nginx.sh](https://github.com/MovLib/www/blob/master/conf/install-scripts/nginx.sh) My configuration: [https://github.com/MovLib/www/tree/master/conf/nginx](https://github.com/MovLib/www/tree/master/conf/nginx) Specifically the gzip configuration: [https://github.com/MovLib/www/blob/master/conf/nginx/conf/gzip.conf](https://github.com/MovLib/www/blob/master/conf/nginx/conf/gzip.conf) Posted at Nginx Forum: > **[Possible gzip\_vary bug? (v1.5.1)](https://forum.nginx.org/read.php?2,240214,240214#msg-240214)** > > I'm running the latest development version of nginx and gzipping is working. But no Vary Accept-Encoding header is added to any gzip response. The gzip\_http\_version isn't affecting the behavior, no matter if I set it to 1.0 or 1.1 no header is sent.... ---
**Author:** ![Fleshgrinder](https://www.ruby-forum.com/letter_avatar_proxy/v4/letter/f/e480ec/32.png) [@Fleshgrinder](https://www.ruby-forum.com/u/Fleshgrinder)\ **Post date:** [June 19, 2013, 3:48pm UTC](https://www.ruby-forum.com/t/possible-gzip-vary-bug-v1-5-1/245574/2 "2013-06-19T15:48:53Z")
Hello! On Wed, Jun 19, 2013 at 08:52:14AM -0400, Fleshgrinder wrote: > [https://github.com/MovLib/www/blob/master/conf/install-scripts/nginx.sh](https://github.com/MovLib/www/blob/master/conf/install-scripts/nginx.sh) > My configuration: [www/conf/nginx at master · MovLib/www · GitHub](https://github.com/MovLib/www/tree/master/conf/nginx) > Specifically the gzip configuration: > [https://github.com/MovLib/www/blob/master/conf/nginx/conf/gzip.conf](https://github.com/MovLib/www/blob/master/conf/nginx/conf/gzip.conf) Works fine here: : GET / HTTP/1.1 : Host: foo : Accept-Encoding: gzip : : HTTP/1.1 200 OK : Server: nginx/1.5.2 : Date: Wed, 19 Jun 2013 13:23:39 GMT : Content-Type: text/html : Last-Modified: Mon, 27 Apr 2009 14:40:49 GMT : Transfer-Encoding: chunked : Connection: keep-alive : Vary: Accept-Encoding : Content-Encoding: gzip Best guess that in your case gzipping happens not in nginx (in php?), and add\_header doesn’t work for you due to other add\_header directives used on more specific levels. Alternatively, you might be testing with spdy, where gzip\_vary does nothing as all clients are required to support gzip. If you still think there is a bug, you may want to provide a simple configuration to reproduce the problem. – Maxim D. > **[nginx: donation](http://nginx.org/en/donation.html)** ---
**Author:** ![Fleshgrinder](https://www.ruby-forum.com/letter_avatar_proxy/v4/letter/f/e480ec/32.png) [@Fleshgrinder](https://www.ruby-forum.com/u/Fleshgrinder)\ **Post date:** [June 19, 2013, 7:53pm UTC](https://www.ruby-forum.com/t/possible-gzip-vary-bug-v1-5-1/245574/3 "2013-06-19T19:53:42Z")
Many thanks Maxim, sometimes the solution is so easy. I was using SPDY and only checked with latest Firefox and Chrome. And one shouldn’t trust Page Speed, it keeps telling me about the vary headers, although it’s using SPDY. Again, many thanks. Posted at Nginx Forum: > **[Re: Possible gzip\_vary bug? (v1.5.1)](https://forum.nginx.org/read.php?2,240214,240223#msg-240223)** > > I'm running the latest development version of nginx and gzipping is working. But no Vary Accept-Encoding header is added to any gzip response. The gzip\_http\_version isn't affecting the behavior, no matter if I set it to 1.0 or 1.1 no header is sent....