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Apache Solr (module: core)
/*
* Licensed to the Apache Software Foundation (ASF) under one or more
* contributor license agreements. See the NOTICE file distributed with
* this work for additional information regarding copyright ownership.
* The ASF licenses this file to You 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 org.apache.solr.servlet;
import java.io.IOException;
import javax.servlet.ServletConfig;
import javax.servlet.ServletException;
import javax.servlet.http.HttpServletRequest;
import javax.servlet.http.HttpServletResponse;
/** A Simple redirection servlet to help us deprecate old UI elements */
public class RedirectServlet extends BaseSolrServlet {
static final String CONTEXT_KEY = "${context}";
String destination;
int code = HttpServletResponse.SC_MOVED_PERMANENTLY;
@Override
public void init(ServletConfig config) throws ServletException {
super.init(config);
destination = config.getInitParameter("destination");
if (destination == null) {
throw new ServletException("RedirectServlet missing destination configuration");
}
if ("false".equals(config.getInitParameter("permanent"))) {
code = HttpServletResponse.SC_MOVED_TEMPORARILY;
}
// Replace the context key
if (destination.startsWith(CONTEXT_KEY)) {
destination =
config.getServletContext().getContextPath() + destination.substring(CONTEXT_KEY.length());
}
}
@Override
public void doGet(HttpServletRequest req, HttpServletResponse res)
throws ServletException, IOException {
res.setStatus(code);
res.setHeader("Location", destination);
}
}