.htaccess

Header unset Pragma
FileETag None
Header unset ETag

<IfModule mod_headers.c>
  <FilesMatch "\.(js|css|xml|gz)$">
    Header append Vary Accept-Encoding
  </FilesMatch>
</IfModule>

<FilesMatch "\.(gif|jpg|jpeg|png|ico)$">
    ExpiresActive On
    ExpiresDefault "access plus 1 month"
</FilesMatch>

<FilesMatch "\.(css|js|html?|xml|txt)$">
    ExpiresActive On
    ExpiresDefault "access plus 1 week"
</FilesMatch>

# compress text, html, javascript, css, xml:
AddOutputFilterByType DEFLATE text/plain
AddOutputFilterByType DEFLATE text/html
AddOutputFilterByType DEFLATE text/xml
AddOutputFilterByType DEFLATE text/css
AddOutputFilterByType DEFLATE application/xml
AddOutputFilterByType DEFLATE application/xhtml+xml
AddOutputFilterByType DEFLATE application/rss+xml
AddOutputFilterByType DEFLATE application/javascript
AddOutputFilterByType DEFLATE application/x-javascript