Mercurial > hg > LightPIT / file revision

 import jakarta.servlet.FilterChain

 import jakarta.servlet.annotation.WebFilter

 import jakarta.servlet.http.HttpFilter

 import jakarta.servlet.http.HttpServletRequest

 import jakarta.servlet.http.HttpServletResponse

 /*

  * Copyright 2023 Mike Becker. All rights reserved.

  *

  * Redistribution and use in source and binary forms, with or without

  * modification, are permitted provided that the following conditions are met:

  *

  * 1. Redistributions of source code must retain the above copyright

  * notice, this list of conditions and the following disclaimer.

  *

  * 2. Redistributions in binary form must reproduce the above copyright

  * notice, this list of conditions and the following disclaimer in the

  * documentation and/or other materials provided with the distribution.

  *

  * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS "AS IS"

  * AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE

  * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE

  * DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT HOLDER OR CONTRIBUTORS BE LIABLE

  * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL

  * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR

  * SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER

  * CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY,

  * OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE

  * OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.

  */

 @WebFilter(urlPatterns = ["*.ttf", "*.css", "*.js"])

 class StaticFilesFilter : HttpFilter() {

     override fun doFilter(req: HttpServletRequest, res: HttpServletResponse, chain: FilterChain) {

         // Apply a Cache-Control Header for static files to allow storing them

         // in shared cache for almost indefinitely. We will cache-bust them when we need an update.

         // RFC-2616 mandates that servers SHOULD NOT specify more than one year, though

         res.addHeader("Cache-Control", "public, max-age=31536000, immutable")

         super.doFilter(req, res, chain)

     }

 }