| /* |
| * 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.dispatch; |
| |
| import org.apache.http.Header; |
| import org.apache.http.HttpEntity; |
| import org.apache.http.HttpResponse; |
| import org.apache.http.client.methods.HttpUriRequest; |
| |
| import javax.servlet.http.HttpServletRequest; |
| import javax.servlet.http.HttpServletResponse; |
| import java.io.IOException; |
| import java.io.InputStream; |
| import java.util.Locale; |
| import java.util.Set; |
| |
| public class NiFiDispatch extends DefaultDispatch { |
| |
| @Override |
| protected void executeRequest(HttpUriRequest outboundRequest, HttpServletRequest inboundRequest, HttpServletResponse outboundResponse) throws IOException { |
| outboundRequest = NiFiRequestUtil.modifyOutboundRequest(outboundRequest, inboundRequest); |
| HttpResponse inboundResponse = executeOutboundRequest(outboundRequest); |
| writeOutboundResponse(outboundRequest, inboundRequest, outboundResponse, inboundResponse); |
| } |
| |
| /** |
| * Overridden to provide a spot to modify the outbound response before its stream is closed. |
| */ |
| @Override |
| protected void writeOutboundResponse(HttpUriRequest outboundRequest, HttpServletRequest inboundRequest, HttpServletResponse outboundResponse, HttpResponse inboundResponse) throws IOException { |
| // Copy the client respond header to the server respond. |
| outboundResponse.setStatus(inboundResponse.getStatusLine().getStatusCode()); |
| Header[] headers = inboundResponse.getAllHeaders(); |
| Set<String> excludeHeaders = getOutboundResponseExcludeHeaders(); |
| boolean hasExcludeHeaders = false; |
| if ((excludeHeaders != null) && !(excludeHeaders.isEmpty())) { |
| hasExcludeHeaders = true; |
| } |
| for ( Header header : headers ) { |
| String name = header.getName(); |
| if (hasExcludeHeaders && excludeHeaders.contains(name.toUpperCase(Locale.ROOT))) { |
| continue; |
| } |
| String value = header.getValue(); |
| outboundResponse.addHeader(name, value); |
| } |
| |
| HttpEntity entity = inboundResponse.getEntity(); |
| if( entity != null ) { |
| outboundResponse.setContentType( getInboundResponseContentType( entity ) ); |
| InputStream stream = entity.getContent(); |
| try { |
| NiFiResponseUtil.modifyOutboundResponse(inboundRequest, outboundResponse, inboundResponse); |
| writeResponse( inboundRequest, outboundResponse, stream ); |
| } finally { |
| closeInboundResponse( inboundResponse, stream ); |
| } |
| } |
| } |
| } |