/*
* Copyright 2012 Eric F. Savage, code@efsavage.com
*
* 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 com.ajah.servlet.filter;
import java.io.IOException;
import javax.servlet.FilterChain;
import javax.servlet.ServletException;
import javax.servlet.ServletRequest;
import javax.servlet.ServletResponse;
import javax.servlet.http.HttpServletRequest;
import lombok.Data;
import lombok.EqualsAndHashCode;
import lombok.extern.java.Log;
import com.ajah.http.Browser;
import com.ajah.servlet.util.RequestUtils;
import com.ajah.util.config.Config;
/**
* Checks to see if the browser is {@link Browser#CHROME} and if not, forwards a
* configurable error url. Default url is "chrome-only", can be overriden via
* config property "ajah.chrome-filter.failure".
*
* @author <a href="http://efsavage.com">Eric F. Savage</a>, <a
* href="mailto:code@efsavage.com">code@efsavage.com</a>.
*/
@Data
@EqualsAndHashCode(callSuper = true)
@Log
public class ChromeFilter extends BaseFilter {
private String failureUrl = Config.i.get("ajah.chrome-filter.failure", "chrome-only");
@Override
public void doFilter(final ServletRequest request, final ServletResponse response, final FilterChain chain) throws IOException, ServletException {
final Browser browser = RequestUtils.getUserAgent((HttpServletRequest) request).getBrowser();
if (browser != Browser.CHROME) {
log.finest("Browser " + browser.getName() + " blocked");
((HttpServletRequest) request).getRequestDispatcher(this.failureUrl).forward(request, response);
return;
}
log.finest("Browser " + browser.getName() + " allowed");
super.doFilter(request, response, chain);
}
}