001/*
002 * #%L
003 * HAPI FHIR - Client Framework
004 * %%
005 * Copyright (C) 2014 - 2024 Smile CDR, Inc.
006 * %%
007 * Licensed under the Apache License, Version 2.0 (the "License");
008 * you may not use this file except in compliance with the License.
009 * You may obtain a copy of the License at
010 *
011 *      http://www.apache.org/licenses/LICENSE-2.0
012 *
013 * Unless required by applicable law or agreed to in writing, software
014 * distributed under the License is distributed on an "AS IS" BASIS,
015 * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
016 * See the License for the specific language governing permissions and
017 * limitations under the License.
018 * #L%
019 */
020package ca.uhn.fhir.rest.client.method;
021
022import ca.uhn.fhir.context.FhirContext;
023import ca.uhn.fhir.rest.api.EncodingEnum;
024import ca.uhn.fhir.rest.api.RequestTypeEnum;
025import ca.uhn.fhir.rest.client.api.IHttpRequest;
026import ca.uhn.fhir.rest.client.api.UrlSourceEnum;
027import ca.uhn.fhir.rest.client.impl.BaseHttpClientInvocation;
028import ca.uhn.fhir.util.UrlUtil;
029import org.apache.commons.lang3.StringUtils;
030
031import java.util.HashMap;
032import java.util.List;
033import java.util.Map;
034import java.util.Map.Entry;
035
036/**
037 * @author James Agnew
038 * @author Doug Martin (Regenstrief Center for Biomedical Informatics)
039 */
040public class HttpGetClientInvocation extends BaseHttpClientInvocation {
041
042        private final Map<String, List<String>> myParameters;
043        private final String myUrlPath;
044        private final UrlSourceEnum myUrlSource;
045
046        public HttpGetClientInvocation(
047                        FhirContext theContext, Map<String, List<String>> theParameters, String... theUrlFragments) {
048                this(theContext, theParameters, UrlSourceEnum.GENERATED, theUrlFragments);
049        }
050
051        public HttpGetClientInvocation(
052                        FhirContext theContext,
053                        Map<String, List<String>> theParameters,
054                        UrlSourceEnum theUrlSource,
055                        String... theUrlFragments) {
056                super(theContext);
057                myParameters = theParameters;
058                myUrlPath = StringUtils.join(theUrlFragments, '/');
059                myUrlSource = theUrlSource;
060        }
061
062        public HttpGetClientInvocation(FhirContext theContext, String theUrlPath) {
063                super(theContext);
064                myParameters = new HashMap<>();
065                myUrlPath = theUrlPath;
066                myUrlSource = UrlSourceEnum.GENERATED;
067        }
068
069        private boolean addQueryParameter(StringBuilder b, boolean first, String nextKey, String nextValue) {
070                boolean retVal = first;
071                if (retVal) {
072                        b.append('?');
073                        retVal = false;
074                } else {
075                        b.append('&');
076                }
077                b.append(UrlUtil.escapeUrlParam(nextKey));
078                b.append('=');
079                b.append(UrlUtil.escapeUrlParam(nextValue));
080
081                return retVal;
082        }
083
084        @Override
085        public IHttpRequest asHttpRequest(
086                        String theUrlBase,
087                        Map<String, List<String>> theExtraParams,
088                        EncodingEnum theEncoding,
089                        Boolean thePrettyPrint) {
090                StringBuilder b = new StringBuilder();
091
092                if (!myUrlPath.contains("://")) {
093                        b.append(theUrlBase);
094                        if (!theUrlBase.endsWith("/") && !myUrlPath.startsWith("/")) {
095                                b.append('/');
096                        }
097                }
098                b.append(myUrlPath);
099
100                boolean first = b.indexOf("?") == -1;
101                for (Entry<String, List<String>> next : myParameters.entrySet()) {
102                        if (next.getValue() == null || next.getValue().isEmpty()) {
103                                continue;
104                        }
105                        String nextKey = next.getKey();
106                        for (String nextValue : next.getValue()) {
107                                first = addQueryParameter(b, first, nextKey, nextValue);
108                        }
109                }
110
111                appendExtraParamsWithQuestionMark(theExtraParams, b, first);
112
113                IHttpRequest retVal = super.createHttpRequest(b.toString(), theEncoding, RequestTypeEnum.GET);
114                retVal.setUrlSource(myUrlSource);
115
116                return retVal;
117        }
118
119        public Map<String, List<String>> getParameters() {
120                return myParameters;
121        }
122
123        public String getUrlPath() {
124                return myUrlPath;
125        }
126}