Cache Filter
/*
************************************************************************************
* Copyright (C) 2001-2006 Openbravo S.L.
* Licensed under the Apache Software License version 2.0
* 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.
************************************************************************************
*/
import java.io.IOException;
import java.util.ArrayList;
import java.util.Enumeration;
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.HttpServletResponse;
public class CacheFilter implements Filter {
private String[][] replyHeaders = { {} };
public void init(FilterConfig config) {
Enumeration<?> names = config.getInitParameterNames();
ArrayList<String[]> tmp = new ArrayList<String[]>();
while (names.hasMoreElements()) {
String name = (String) names.nextElement();
String value = config.getInitParameter(name);
String[] pair = { name, value };
tmp.add(pair);
}
replyHeaders = new String[tmp.size()][2];
tmp.toArray(replyHeaders);
}
public void doFilter(ServletRequest request, ServletResponse response, FilterChain chain)
throws IOException, ServletException {
HttpServletResponse httpResponse = (HttpServletResponse) response;
for (int n = 0; n < replyHeaders.length; n++) {
String name = replyHeaders[n][0];
String value = replyHeaders[n][1];
httpResponse.addHeader(name, value);
}
chain.doFilter(request, response);
}
public void destroy() {
}
}
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