001package ca.uhn.fhir.rest.server.util;
002
003/*-
004 * #%L
005 * HAPI FHIR - Server 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.rest.api.RequestTypeEnum;
024import ca.uhn.fhir.rest.server.servlet.ServletRequestDetails;
025import ca.uhn.fhir.rest.server.servlet.ServletSubRequestDetails;
026import ca.uhn.fhir.util.UrlUtil;
027import com.google.common.collect.ArrayListMultimap;
028import org.apache.http.NameValuePair;
029
030import java.util.Collection;
031import java.util.HashMap;
032import java.util.List;
033import java.util.Map;
034
035public class ServletRequestUtil {
036        public static ServletSubRequestDetails getServletSubRequestDetails(ServletRequestDetails theRequestDetails, String url, ArrayListMultimap<String, String> theParamValues) {
037                ServletSubRequestDetails requestDetails = new ServletSubRequestDetails(theRequestDetails);
038                requestDetails.setServletRequest(theRequestDetails.getServletRequest());
039                requestDetails.setRequestType(RequestTypeEnum.GET);
040                requestDetails.setServer(theRequestDetails.getServer());
041
042                int qIndex = url.indexOf('?');
043                requestDetails.setParameters(new HashMap<>());
044                if (qIndex != -1) {
045                        String params = url.substring(qIndex);
046                        List<NameValuePair> parameters = UrlUtil.translateMatchUrl(params);
047                        for (NameValuePair next : parameters) {
048                                theParamValues.put(next.getName(), next.getValue());
049                        }
050                        for (Map.Entry<String, Collection<String>> nextParamEntry : theParamValues.asMap().entrySet()) {
051                                String[] nextValue = nextParamEntry.getValue().toArray(new String[nextParamEntry.getValue().size()]);
052                                requestDetails.addParameter(nextParamEntry.getKey(), nextValue);
053                        }
054                        url = url.substring(0, qIndex);
055                }
056
057                if (url.length() > 0 && url.charAt(0) == '/') {
058                        url = url.substring(1);
059                }
060
061                requestDetails.setRequestPath(url);
062                requestDetails.setFhirServerBase(theRequestDetails.getFhirServerBase());
063
064                theRequestDetails.getServer().populateRequestDetailsFromRequestPath(requestDetails, url);
065                return requestDetails;
066        }
067
068        public static String extractUrl(ServletRequestDetails theRequestDetails) {
069                StringBuilder b = new StringBuilder();
070                for (Map.Entry<String, String[]> next : theRequestDetails.getParameters().entrySet()) {
071                        for (String nextValue : next.getValue()) {
072                                if (b.length() == 0) {
073                                        b.append('?');
074                                } else {
075                                        b.append('&');
076                                }
077                                b.append(UrlUtil.escapeUrlParam(next.getKey()));
078                                b.append('=');
079                                b.append(UrlUtil.escapeUrlParam(nextValue));
080                        }
081                }
082                return theRequestDetails.getRequestPath() + b.toString();
083        }
084}