gzip on;
gzip_min_length 1k;
# gzip_disable "msie6";
gzip_comp_level 4;
gzip_buffers 4 16k;  
gzip_http_version 1.1;
gzip_types text/plain text/css application/json application/javascript text/xml application/xml application/xml+rss text/javascript;
gzip_vary on;
# gzip_proxied any;