| /* |
| * 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.ha.dispatch; |
| |
| import org.apache.http.Header; |
| 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.util.Collections; |
| import java.util.Set; |
| |
| public class AtlasHaDispatch extends DefaultHaDispatch { |
| private static final Set<String> REQUEST_EXCLUDE_HEADERS = Collections.singleton("Content-Length"); |
| |
| public AtlasHaDispatch() { |
| setServiceRole("ATLAS"); |
| } |
| |
| @Override |
| public Set<String> getOutboundResponseExcludeHeaders() { |
| return Collections.emptySet(); |
| } |
| |
| @Override |
| public Set<String> getOutboundRequestExcludeHeaders() { |
| return REQUEST_EXCLUDE_HEADERS; |
| } |
| |
| @Override |
| protected void executeRequest(HttpUriRequest outboundRequest, |
| HttpServletRequest inboundRequest, |
| HttpServletResponse outboundResponse) throws IOException { |
| HttpResponse inboundResponse = null; |
| try { |
| inboundResponse = executeOutboundRequest(outboundRequest); |
| |
| int sc = inboundResponse.getStatusLine().getStatusCode(); |
| if(sc == HttpServletResponse.SC_MOVED_TEMPORARILY || sc == HttpServletResponse.SC_TEMPORARY_REDIRECT) { |
| if(!isLoginRedirect(inboundResponse.getFirstHeader("Location"))) { |
| inboundResponse.removeHeaders("Location"); |
| failoverRequest(outboundRequest, |
| inboundRequest, |
| outboundResponse, |
| inboundResponse, |
| new Exception("Atlas HA redirection")); |
| } |
| } |
| |
| writeOutboundResponse(outboundRequest, inboundRequest, outboundResponse, inboundResponse); |
| |
| } catch (IOException e) { |
| LOG.errorConnectingToServer(outboundRequest.getURI().toString(), e); |
| failoverRequest(outboundRequest, inboundRequest, outboundResponse, inboundResponse, e); |
| } |
| } |
| |
| private boolean isLoginRedirect(Header locationHeader) { |
| boolean result = false; |
| if (locationHeader != null) { |
| String value = locationHeader.getValue(); |
| result = (value.endsWith("login.jsp") || value.contains("originalUrl")); |
| } |
| return result; |
| } |
| |
| } |