modules/enterprise/gui/coregui/src/main/java/org/rhq/enterprise/gui/coregui/server/filter/CacheControlFilter.java
| 76 ++++++++++
modules/enterprise/gui/coregui/src/main/webapp/WEB-INF/web.xml
| 9 +
2 files changed, 85 insertions(+)
New commits:
commit c9efcac6010e5a0a6f64472d1465d8e3cd991545
Author: Ian Springer <ian.springer(a)redhat.com>
Date: Wed Mar 23 16:58:19 2011 -0400
implement "perfect caching" for GWT-compiled URLs
(
https://bugzilla.redhat.com/show_bug.cgi?id=617729)
diff --git
a/modules/enterprise/gui/coregui/src/main/java/org/rhq/enterprise/gui/coregui/server/filter/CacheControlFilter.java
b/modules/enterprise/gui/coregui/src/main/java/org/rhq/enterprise/gui/coregui/server/filter/CacheControlFilter.java
new file mode 100644
index 0000000..3f49857
--- /dev/null
+++
b/modules/enterprise/gui/coregui/src/main/java/org/rhq/enterprise/gui/coregui/server/filter/CacheControlFilter.java
@@ -0,0 +1,76 @@
+/*
+ * RHQ Management Platform
+ * Copyright (C) 2011 Red Hat, Inc.
+ * All rights reserved.
+ *
+ * This program is free software; you can redistribute it and/or modify
+ * it under the terms of the GNU General Public License as published by
+ * the Free Software Foundation version 2 of the License.
+ *
+ * This program is distributed in the hope that it will be useful,
+ * but WITHOUT ANY WARRANTY; without even the implied warranty of
+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
+ * GNU General Public License for more details.
+ *
+ * You should have received a copy of the GNU General Public License
+ * along with this program; if not, write to the Free Software
+ * Foundation, Inc., 675 Mass Ave, Cambridge, MA 02139, USA.
+ */
+package org.rhq.enterprise.gui.coregui.server.filter;
+
+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;
+import java.io.IOException;
+import java.util.Date;
+
+/**
+ * Specify the cache policy browsers should use for GWT-compiled files. See
+ *
http://code.google.com/webtoolkit/doc/latest/DevGuideCompilingAndDebuggin...
for more info.
+ *
+ * @author Ian Springer
+ */
+public class CacheControlFilter implements Filter {
+
+ private static final long SECONDS_IN_ONE_YEAR = 365 * 24 * 60 * 60L;
+ private static final long MILLISECONDS_IN_ONE_YEAR = SECONDS_IN_ONE_YEAR * 1000;
+
+ public void init(FilterConfig config) throws ServletException {
+ return;
+ }
+
+ public void doFilter(ServletRequest request, ServletResponse response, FilterChain
filterChain) throws IOException,
+ ServletException {
+ HttpServletRequest httpServletRequest = (HttpServletRequest) request;
+ String requestURI = httpServletRequest.getRequestURI();
+
+ if (requestURI.contains(".nocache.")) {
+ // Tell browser to disable caching of the content.
+ Date now = new Date();
+ HttpServletResponse httpResponse = (HttpServletResponse) response;
+ httpResponse.setDateHeader("Date", now.getTime());
+ httpResponse.setDateHeader("Expires", now.getTime() - 1);
+ httpResponse.setHeader("Pragma", "no-cache");
+ httpResponse.setHeader("Cache-Control", "public, max-age=0,
must-revalidate");
+ } else if (requestURI.contains(".cache.")) {
+ // Tell browser to cache the content for one year.
+ Date now = new Date();
+ HttpServletResponse httpResponse = (HttpServletResponse) response;
+ httpResponse.setDateHeader("Date", now.getTime());
+ httpResponse.setDateHeader("Expires", now.getTime() +
MILLISECONDS_IN_ONE_YEAR);
+ httpResponse.setHeader("Cache-Control", "max-age=" +
SECONDS_IN_ONE_YEAR);
+ }
+
+ filterChain.doFilter(request, response);
+ }
+
+ public void destroy() {
+ return;
+ }
+
+}
diff --git a/modules/enterprise/gui/coregui/src/main/webapp/WEB-INF/web.xml
b/modules/enterprise/gui/coregui/src/main/webapp/WEB-INF/web.xml
index ac247b1..d06fa58 100644
--- a/modules/enterprise/gui/coregui/src/main/webapp/WEB-INF/web.xml
+++ b/modules/enterprise/gui/coregui/src/main/webapp/WEB-INF/web.xml
@@ -7,6 +7,15 @@
<display-name>RHQ GUI</display-name>
+ <filter>
+ <filter-name>CacheControlFilter</filter-name>
+
<filter-class>org.rhq.enterprise.gui.coregui.server.filter.CacheControlFilter</filter-class>
+ </filter>
+
+ <filter-mapping>
+ <filter-name>CacheControlFilter</filter-name>
+ <url-pattern>/*</url-pattern>
+ </filter-mapping>
<servlet>
<servlet-name>org.rhq.enterprise.gui.coregui.CoreGUI
RoleGWTService</servlet-name>