001package ca.uhn.fhir.rest.client.interceptor;
002
003/*-
004 * #%L
005 * HAPI FHIR - Client Framework
006 * %%
007 * Copyright (C) 2014 - 2022 Smile CDR, Inc.
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.i18n.Msg;
024import ca.uhn.fhir.interceptor.api.Hook;
025import ca.uhn.fhir.interceptor.api.Interceptor;
026import ca.uhn.fhir.interceptor.api.Pointcut;
027import ca.uhn.fhir.rest.client.api.IHttpRequest;
028import ca.uhn.fhir.rest.client.api.IHttpResponse;
029import ca.uhn.fhir.rest.server.exceptions.InternalErrorException;
030import org.apache.http.HttpEntity;
031import org.apache.http.HttpResponse;
032
033import java.io.IOException;
034
035/**
036 * Client interceptor which simply captures request and response objects and stores them so that they can be inspected after a client
037 * call has returned
038 *
039 * @see ThreadLocalCapturingInterceptor for an interceptor that uses a ThreadLocal in order to work in multithreaded environments
040 */
041@Interceptor
042public class CapturingInterceptor {
043
044        private IHttpRequest myLastRequest;
045        private IHttpResponse myLastResponse;
046
047        /**
048         * Clear the last request and response values
049         */
050        public void clear() {
051                myLastRequest = null;
052                myLastResponse = null;
053        }
054
055        public IHttpRequest getLastRequest() {
056                return myLastRequest;
057        }
058
059        public IHttpResponse getLastResponse() {
060                return myLastResponse;
061        }
062
063        @Hook(value = Pointcut.CLIENT_REQUEST, order = InterceptorOrders.CAPTURING_INTERCEPTOR_REQUEST)
064        public void interceptRequest(IHttpRequest theRequest) {
065                myLastRequest = theRequest;
066        }
067
068        @Hook(value = Pointcut.CLIENT_RESPONSE, order = InterceptorOrders.CAPTURING_INTERCEPTOR_RESPONSE)
069        public void interceptResponse(IHttpResponse theResponse) {
070                //Buffer the reponse to avoid errors when content has already been read and the entity is not repeatable
071                bufferResponse(theResponse);
072
073                myLastResponse = theResponse;
074        }
075
076        static void bufferResponse(IHttpResponse theResponse) {
077                try {
078                        if (theResponse.getResponse() instanceof HttpResponse) {
079                                HttpEntity entity = ((HttpResponse) theResponse.getResponse()).getEntity();
080                                if (entity != null && !entity.isRepeatable()) {
081                                        theResponse.bufferEntity();
082                                }
083                        } else {
084                                theResponse.bufferEntity();
085                        }
086                } catch (IOException e) {
087                        throw new InternalErrorException(Msg.code(1404) + "Unable to buffer the entity for capturing", e);
088                }
089        }
090
091}