id	summary	reporter	owner	description	type	status	priority	milestone	component	version	resolution	keywords	cc	uname	nginx_version
1159	gzip doesn't work for HTTP status 202	wkornewald@…		"Whenever our backend returns a non-200 status code the response, nginx doesn't gzip the response. In order to track this down to nginx I've setup a simple localhost proxy like this:

{{{

worker_processes auto;

events {
  use epoll;
  multi_accept on;
  worker_connections 2048;
}

error_log /var/log/nginx/error.log warn;
pid /run/nginx.pid;

daemon off;

http {
  include /etc/nginx/mime.types;
  default_type application/octet-stream;
  proxy_headers_hash_max_size 1024;
  proxy_headers_hash_bucket_size 128;

  server_tokens off;

  log_format main '$remote_addr - $remote_user [$time_local] $http_host '
                  '$server_port $status ""$request"" '
                  '$body_bytes_sent $request_time $upstream_addr '
                  '$upstream_response_time ""$http_referer"" '
                  '""$http_user_agent""';

  access_log /var/log/nginx/access.log main;

  sendfile on;
  tcp_nopush on;
  tcp_nodelay on;
  keepalive_timeout 65;
  keepalive_requests 100000;
  types_hash_max_size 2048;
  reset_timedout_connection on;
  send_timeout 4;

  gzip on;
  gzip_min_length 256;
  gzip_types text/plain text/css application/json application/x-javascript text/xml application/xml application/xml+rss text/javascript application/javascript text/x-js;
  gzip_comp_level 6;

  server {
    listen [::]:80 so_keepalive=on reuseport deferred;
    listen 80 so_keepalive=on reuseport deferred;
    server_name """";

    location / {
      return 444;
    }

    location /raw/200 {
      return 200 gaga;
    }

    location /raw/202 {
      return 202 lulu;
    }

    location /comp {
      proxy_set_header Host $host;
      proxy_set_header X-Forwarded-Proto $scheme;
      proxy_set_header X-Real-IP $remote_addr;
      proxy_set_header X-Forwarded-For $proxy_add_x_forwarded_for;
      proxy_redirect off;
      proxy_buffering off;
      proxy_pass http://127.0.0.1/raw;
      gzip on;
      gzip_min_length 1;
      gzip_types *;
      gzip_proxied any;
    }
  }
}

}}}

The result with response 200:

{{{
# curl -v --compressed localhost/comp/200
*   Trying 127.0.0.1...
* TCP_NODELAY set
* Connected to localhost (127.0.0.1) port 80 (#0)
> GET /comp/200 HTTP/1.1
> Host: localhost
> User-Agent: curl/7.50.2
> Accept: */*
> Accept-Encoding: deflate, gzip
>
< HTTP/1.1 200 OK
< Server: nginx
< Date: Wed, 14 Dec 2016 10:51:26 GMT
< Content-Type: application/octet-stream
< Transfer-Encoding: chunked
< Connection: keep-alive
< Content-Encoding: gzip
<
* Curl_http_done: called premature == 0
* Connection #0 to host localhost left intact
gaga
}}}

The result with response 202:

{{{
# curl -v --compressed localhost/comp/202
*   Trying 127.0.0.1...
* TCP_NODELAY set
* Connected to localhost (127.0.0.1) port 80 (#0)
> GET /comp/202 HTTP/1.1
> Host: localhost
> User-Agent: curl/7.50.2
> Accept: */*
> Accept-Encoding: deflate, gzip
>
< HTTP/1.1 202 Accepted
< Server: nginx
< Date: Wed, 14 Dec 2016 10:52:11 GMT
< Content-Type: application/octet-stream
< Content-Length: 4
< Connection: keep-alive
<
* Curl_http_done: called premature == 0
* Connection #0 to host localhost left intact
lulu
}}}"	defect	closed	minor		other	1.11.x	wontfix			Linux myserver 4.7.3-coreos-r3 #1 SMP Wed Dec 7 09:29:55 UTC 2016 x86_64 GNU/Linux	"nginx version: nginx/1.11.7
built by gcc 4.9.2 (Debian 4.9.2-10)
built with OpenSSL 1.0.1t  3 May 2016
TLS SNI support enabled
configure arguments: --prefix=/etc/nginx --sbin-path=/usr/sbin/nginx --modules-path=/usr/lib/nginx/modules --conf-path=/etc/nginx/nginx.conf --error-log-path=/var/log/nginx/error.log --http-log-path=/var/log/nginx/access.log --pid-path=/var/run/nginx.pid --lock-path=/var/run/nginx.lock --http-client-body-temp-path=/var/cache/nginx/client_temp --http-proxy-temp-path=/var/cache/nginx/proxy_temp --http-fastcgi-temp-path=/var/cache/nginx/fastcgi_temp --http-uwsgi-temp-path=/var/cache/nginx/uwsgi_temp --http-scgi-temp-path=/var/cache/nginx/scgi_temp --user=nginx --group=nginx --with-compat --with-file-aio --with-threads --with-http_addition_module --with-http_auth_request_module --with-http_dav_module --with-http_flv_module --with-http_gunzip_module --with-http_gzip_static_module --with-http_mp4_module --with-http_random_index_module --with-http_realip_module --with-http_secure_link_module --with-http_slice_module --with-http_ssl_module --with-http_stub_status_module --with-http_sub_module --with-http_v2_module --with-mail --with-mail_ssl_module --with-stream --with-stream_realip_module --with-stream_ssl_module --with-stream_ssl_preread_module --with-cc-opt='-g -O2 -fstack-protector-strong -Wformat -Werror=format-security -Wp,-D_FORTIFY_SOURCE=2' --with-ld-opt='-Wl,-z,relro -Wl,-z,now -Wl,--as-needed'"