001package ca.uhn.fhir.rest.client.interceptor;
002
003/*
004 * #%L
005 * HAPI FHIR - Core Library
006 * %%
007 * Copyright (C) 2014 - 2017 University Health Network
008 * %%
009 * Licensed under the Apache License, Version 2.0 (the "License");
010 * you may not use this file except in compliance with the License.
011 * You may obtain a copy of the License at
012 * 
013 *      http://www.apache.org/licenses/LICENSE-2.0
014 * 
015 * Unless required by applicable law or agreed to in writing, software
016 * distributed under the License is distributed on an "AS IS" BASIS,
017 * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
018 * See the License for the specific language governing permissions and
019 * limitations under the License.
020 * #L%
021 */
022
023import ca.uhn.fhir.rest.client.IClientInterceptor;
024import ca.uhn.fhir.rest.client.api.IHttpRequest;
025import ca.uhn.fhir.rest.client.api.IHttpResponse;
026import ca.uhn.fhir.rest.server.exceptions.InternalErrorException;
027import org.apache.http.HttpEntity;
028import org.apache.http.HttpResponse;
029
030import java.io.IOException;
031
032/**
033 * Client interceptor which simply captures request and response objects and stores them so that they can be inspected after a client
034 * call has returned
035 */
036public class CapturingInterceptor implements IClientInterceptor {
037
038        private IHttpRequest myLastRequest;
039        private IHttpResponse myLastResponse;
040
041        /**
042         * Clear the last request and response values
043         */
044        public void clear() {
045                myLastRequest = null;
046                myLastResponse = null;
047        }
048
049        public IHttpRequest getLastRequest() {
050                return myLastRequest;
051        }
052
053        public IHttpResponse getLastResponse() {
054                return myLastResponse;
055        }
056
057        @Override
058        public void interceptRequest(IHttpRequest theRequest) {
059                myLastRequest = theRequest;
060        }
061
062        @Override
063        public void interceptResponse(IHttpResponse theResponse) {
064                //Buffer the reponse to avoid errors when content has already been read and the entity is not repeatable
065                try {
066                        if(theResponse.getResponse() instanceof HttpResponse) {
067                                HttpEntity entity = ((HttpResponse) theResponse.getResponse()).getEntity();
068                                if( entity != null && !entity.isRepeatable()){
069                                        theResponse.bufferEntity();
070                                }
071                        } else {
072                                theResponse.bufferEntity();
073                        }
074                } catch (IOException e) {
075                        throw new InternalErrorException("Unable to buffer the entity for capturing", e);
076                }
077
078
079                myLastResponse = theResponse;
080        }
081
082}