1.1 --- /dev/null Thu Jan 01 00:00:00 1970 +0000
1.2 +++ b/src/main/kotlin/de/uapcore/lightpit/filter/StaticFilesFilter.kt Sun Sep 03 12:02:44 2023 +0200
1.3 @@ -0,0 +1,41 @@
1.4 +import jakarta.servlet.FilterChain
1.5 +import jakarta.servlet.annotation.WebFilter
1.6 +import jakarta.servlet.http.HttpFilter
1.7 +import jakarta.servlet.http.HttpServletRequest
1.8 +import jakarta.servlet.http.HttpServletResponse
1.9 +
1.10 +/*
1.11 + * Copyright 2023 Mike Becker. All rights reserved.
1.12 + *
1.13 + * Redistribution and use in source and binary forms, with or without
1.14 + * modification, are permitted provided that the following conditions are met:
1.15 + *
1.16 + * 1. Redistributions of source code must retain the above copyright
1.17 + * notice, this list of conditions and the following disclaimer.
1.18 + *
1.19 + * 2. Redistributions in binary form must reproduce the above copyright
1.20 + * notice, this list of conditions and the following disclaimer in the
1.21 + * documentation and/or other materials provided with the distribution.
1.22 + *
1.23 + * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS "AS IS"
1.24 + * AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
1.25 + * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE
1.26 + * DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT HOLDER OR CONTRIBUTORS BE LIABLE
1.27 + * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
1.28 + * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR
1.29 + * SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER
1.30 + * CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY,
1.31 + * OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
1.32 + * OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
1.33 + */
1.34 +
1.35 +@WebFilter(urlPatterns = ["*.ttf", "*.css", "*.js"])
1.36 +class StaticFilesFilter : HttpFilter() {
1.37 + override fun doFilter(req: HttpServletRequest, res: HttpServletResponse, chain: FilterChain) {
1.38 + // Apply a Cache-Control Header for static files to allow storing them
1.39 + // in shared cache for almost indefinitely. We will cache-bust them when we need an update.
1.40 + // RFC-2616 mandates that servers SHOULD NOT specify more than one year, though
1.41 + res.addHeader("Cache-Control", "public, max-age=31536000, immutable")
1.42 + super.doFilter(req, res, chain)
1.43 + }
1.44 +}
