/*
* Copyright 2009-2010 the original author or authors.
*
* 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 org.springframework.batch.admin.web.filter;
import java.io.IOException;
import javax.servlet.FilterChain;
import javax.servlet.ServletException;
import javax.servlet.http.HttpServletRequest;
import javax.servlet.http.HttpServletResponse;
import javax.servlet.http.HttpServletResponseWrapper;
import org.springframework.util.StringUtils;
import org.springframework.web.filter.OncePerRequestFilter;
public class SessionIdFilter extends OncePerRequestFilter {
private static final String JSESSIONID_PATTERN = ";[jJ][sS][eE][sS][sS][iI][oO][nN][iI][dD]=[A-Za-z0-9]+";
@Override
protected void doFilterInternal(HttpServletRequest request, HttpServletResponse response, FilterChain filterChain)
throws ServletException, IOException {
if (!bounceRequestWithSessionIdInUrl(request, response)) {
filterChain.doFilter(request, new EnhancedResponseWrapper(response));
}
}
private boolean bounceRequestWithSessionIdInUrl(HttpServletRequest request, HttpServletResponse response)
throws IOException {
String url = request.getRequestURL().toString();
if (url.matches("(.*)" + JSESSIONID_PATTERN + "(.*)")) {
String queryString = request.getQueryString();
url = url.replaceAll(JSESSIONID_PATTERN, "") + (StringUtils.hasText(queryString) ? "?" + queryString : "");
response.sendRedirect(url);
return true;
}
return false;
}
private static class EnhancedResponseWrapper extends HttpServletResponseWrapper {
public EnhancedResponseWrapper(HttpServletResponse response) {
super(response);
}
@Override
public String encodeRedirectUrl(String url) {
return encodeRedirectURL(url);
}
@Override
public String encodeRedirectURL(String url) {
String encoded = super.encodeRedirectURL(url);
return stripSessionId(encoded);
}
@Override
public String encodeUrl(String url) {
return encodeURL(url);
}
@Override
public String encodeURL(String url) {
String encoded = super.encodeURL(url);
return stripSessionId(encoded);
}
private String stripSessionId(String encoded) {
return encoded.replaceAll(JSESSIONID_PATTERN, "");
}
}
}
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