Htaccess File

letsdoitworld/drupalsite/master/sites/default/advagg_files/default/advagg_css/.htaccess

<FilesMatch "^css_[0-9a-f]{32}_.+.css(.gz)?">
  # No mod_headers
  <IfModule !mod_headers.c>
    # No mod_expires
    <IfModule !mod_expires.c>
      # Use ETags.
      FileETag MTime Size
    </IfModule>

    # Use Expires Directive.
    <IfModule mod_expires.c>
      # Do not use ETags.
      FileETag None
      # Enable expirations.
      ExpiresActive On
      # Cache all aggregated css files for 480 weeks after access (A).
      ExpiresDefault A290304000
    </IfModule>
  </IfModule>

  <IfModule mod_headers.c>
    # Set a far future Cache-Control header to 480 weeks.
    Header set Cache-Control "max-age=290304000, no-transform, public"
    # Set a far future Expires header.
    Header set Expires "Tue, 20 Jan 2037 04:20:42 GMT"
    # Pretend the file was last modified a long time ago in the past.
    Header set Last-Modified "Wed, 20 Jan 1988 04:20:42 GMT"
    # Do not use etags for cache validation.
    Header unset ETag
  </IfModule>
</FilesMatch>
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