| /* |
| * 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.knox.gateway.filter; |
| |
| import javax.servlet.FilterChain; |
| import javax.servlet.FilterConfig; |
| import javax.servlet.ServletException; |
| import javax.servlet.http.HttpServletRequest; |
| import javax.servlet.http.HttpServletResponse; |
| import java.io.IOException; |
| |
| public class XForwardedHeaderFilter extends AbstractGatewayFilter { |
| |
| private static final String APPEND_SERVICE_NAME_PARAM = "isAppendServiceName"; |
| /** |
| * There could be a case where a service might use double context paths |
| * e.g. "/livy/v1" instead of "livy". |
| * This parameter can be used to add such context (/livy/v1) to the |
| * X-Forward-Context header. |
| */ |
| private static final String SERVICE_CONTEXT = "serviceContext"; |
| |
| private boolean isAppendServiceName; |
| private String serviceContext; |
| |
| @Override |
| public void init( FilterConfig filterConfig ) throws ServletException { |
| super.init( filterConfig ); |
| isAppendServiceName = Boolean.parseBoolean(filterConfig.getInitParameter(APPEND_SERVICE_NAME_PARAM)); |
| serviceContext = filterConfig.getInitParameter(SERVICE_CONTEXT); |
| } |
| |
| @Override |
| protected void doFilter(HttpServletRequest request, HttpServletResponse response, FilterChain chain) throws IOException, ServletException { |
| chain.doFilter( new XForwardedHeaderRequestWrapper( request , isAppendServiceName, serviceContext), response ); |
| } |
| } |