Mercurial > hg > LightPIT / file diff

--- /dev/null	Thu Jan 01 00:00:00 1970 +0000
+++ b/src/main/kotlin/de/uapcore/lightpit/filter/StaticFilesFilter.kt	Sun Sep 03 12:02:44 2023 +0200
@@ -0,0 +1,41 @@
+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)
+    }
+}