From 09992f44dd542729e698763cc07c05c42c8e2ee4 Mon Sep 17 00:00:00 2001
From: buczekp <buczekp>
Date: Tue, 20 Apr 2010 07:39:44 +0000
Subject: [PATCH] [LMS-1492] configured caching
SVN: 15523
---
openbis/resource/server/web.xml | 9 +++
.../openbis/generic/server/CacheFilter.java | 78 +++++++++++++++++++
2 files changed, 87 insertions(+)
create mode 100644 openbis/source/java/ch/systemsx/cisd/openbis/generic/server/CacheFilter.java
diff --git a/openbis/resource/server/web.xml b/openbis/resource/server/web.xml
index 2700ba66b8b..75a1fce8d2f 100644
--- a/openbis/resource/server/web.xml
+++ b/openbis/resource/server/web.xml
@@ -36,6 +36,15 @@
ch.systemsx.cisd.openbis.generic.server.GenericHttpSessionListener
</listener-class>
</listener>
+
+ <filter>
+ <filter-name>CacheFilter</filter-name>
+ <filter-class>ch.systemsx.cisd.openbis.generic.server.CacheFilter</filter-class>
+ </filter>
+ <filter-mapping>
+ <filter-name>CacheFilter</filter-name>
+ <url-pattern>/*</url-pattern>
+ </filter-mapping>
<!-- Trying kind of extension (i.e., '*.do') here as 'url-pattern' does not work. -->
<servlet-mapping>
diff --git a/openbis/source/java/ch/systemsx/cisd/openbis/generic/server/CacheFilter.java b/openbis/source/java/ch/systemsx/cisd/openbis/generic/server/CacheFilter.java
new file mode 100644
index 00000000000..2221aec0a04
--- /dev/null
+++ b/openbis/source/java/ch/systemsx/cisd/openbis/generic/server/CacheFilter.java
@@ -0,0 +1,78 @@
+/*
+ * Copyright 2008 ETH Zuerich, CISD
+ *
+ * Licensed under the Apache License, Version 2.0 (the "License");
+ * you may not use this file except in compliance with the License.
+ * You may obtain a copy of the License at
+ *
+ * http://www.apache.org/licenses/LICENSE-2.0
+ *
+ * Unless required by applicable law or agreed to in writing, software
+ * distributed under the License is distributed on an "AS IS" BASIS,
+ * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ * See the License for the specific language governing permissions and
+ * limitations under the License.
+ */
+
+package ch.systemsx.cisd.openbis.generic.server;
+
+import java.io.IOException;
+
+import javax.servlet.Filter;
+import javax.servlet.FilterChain;
+import javax.servlet.FilterConfig;
+import javax.servlet.ServletException;
+import javax.servlet.ServletRequest;
+import javax.servlet.ServletResponse;
+import javax.servlet.http.HttpServletRequest;
+import javax.servlet.http.HttpServletResponse;
+
+/**
+ * Implements {@link Filter} and sets the cache to store data for resources that don't have
+ * '.nocache.' in their name. Static resources such as images should stay in cache for a long time.
+ *
+ * @author Piotr Buczek
+ */
+public class CacheFilter implements Filter
+{
+ @SuppressWarnings("unused")
+ private FilterConfig filterConfig;
+
+ private static final int DAY_IN_SECONDS = 24 * 60 * 60;
+
+ private static final int YEAR_IN_SECONDS = 365 * DAY_IN_SECONDS;
+
+ private static final int SPRINT_IN_SECONDS = 14 * DAY_IN_SECONDS;
+
+ public void doFilter(ServletRequest request, ServletResponse response, FilterChain filterChain)
+ throws IOException, ServletException
+ {
+
+ HttpServletRequest httpRequest = (HttpServletRequest) request;
+
+ String requestURI = httpRequest.getRequestURI();
+ if (requestURI.contains(".nocache.") == false)
+ {
+ HttpServletResponse httpResponse = (HttpServletResponse) response;
+ httpResponse.addHeader("Cache-Control", "max-age="
+ + (isPicture(requestURI) ? YEAR_IN_SECONDS : SPRINT_IN_SECONDS));
+ }
+ filterChain.doFilter(request, response);
+
+ }
+
+ private boolean isPicture(String requestURI)
+ {
+ return requestURI.endsWith(".gif") || requestURI.endsWith(".png");
+ }
+
+ public void init(FilterConfig config) throws ServletException
+ {
+ this.filterConfig = config;
+ }
+
+ public void destroy()
+ {
+ this.filterConfig = null;
+ }
+}
--
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