package ca.uhn.fhir.jaxrs.client;
/*
* #%L
* HAPI FHIR JAX-RS Server
* %%
* Copyright (C) 2014 - 2017 University Health Network
* %%
* Licensed 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.
* #L%
*/
import java.util.List;
import java.util.Map;
import javax.ws.rs.client.Client;
import javax.ws.rs.client.Entity;
import javax.ws.rs.client.Invocation.Builder;
import javax.ws.rs.core.Form;
import javax.ws.rs.core.MultivaluedHashMap;
import javax.ws.rs.core.MultivaluedMap;
import org.hl7.fhir.instance.model.api.IBaseBinary;
import ca.uhn.fhir.context.FhirContext;
import ca.uhn.fhir.rest.api.RequestTypeEnum;
import ca.uhn.fhir.rest.client.BaseHttpClientInvocation;
import ca.uhn.fhir.rest.client.api.Header;
import ca.uhn.fhir.rest.client.api.HttpClientUtil;
import ca.uhn.fhir.rest.client.api.IHttpClient;
import ca.uhn.fhir.rest.client.api.IHttpRequest;
import ca.uhn.fhir.rest.server.Constants;
import ca.uhn.fhir.rest.server.EncodingEnum;
import ca.uhn.fhir.rest.server.RestfulServerUtils;
/**
* A Http Request based on JaxRs. This is an adapter around the class
* {@link javax.ws.rs.client.Client Client}
*
* @author Peter Van Houte | peter.vanhoute@agfa.com | Agfa Healthcare
*/
public class JaxRsHttpClient implements IHttpClient {
private Client myClient;
private List<Header> myHeaders;
private StringBuilder myUrl;
private Map<String, List<String>> myIfNoneExistParams;
private String myIfNoneExistString;
private RequestTypeEnum myRequestType;
public JaxRsHttpClient(Client theClient, StringBuilder theUrl, Map<String, List<String>> theIfNoneExistParams, String theIfNoneExistString,
RequestTypeEnum theRequestType, List<Header> theHeaders) {
this.myClient = theClient;
this.myUrl = theUrl;
this.myIfNoneExistParams = theIfNoneExistParams;
this.myIfNoneExistString = theIfNoneExistString;
this.myRequestType = theRequestType;
this.myHeaders = theHeaders;
}
@Override
public IHttpRequest createByteRequest(FhirContext theContext, String theContents, String theContentType, EncodingEnum theEncoding) {
Entity<String> entity = Entity.entity(theContents, theContentType + Constants.HEADER_SUFFIX_CT_UTF_8);
JaxRsHttpRequest retVal = createHttpRequest(entity);
addHeadersToRequest(retVal, theEncoding, theContext);
retVal.addHeader(Constants.HEADER_CONTENT_TYPE, theContentType + Constants.HEADER_SUFFIX_CT_UTF_8);
return retVal;
}
@Override
public IHttpRequest createParamRequest(FhirContext theContext, Map<String, List<String>> theParams, EncodingEnum theEncoding) {
MultivaluedMap<String, String> map = new MultivaluedHashMap<String, String>();
for (Map.Entry<String, List<String>> nextParam : theParams.entrySet()) {
List<String> value = nextParam.getValue();
for (String s : value) {
map.add(nextParam.getKey(), s);
}
}
Entity<Form> entity = Entity.form(map);
JaxRsHttpRequest retVal = createHttpRequest(entity);
addHeadersToRequest(retVal, theEncoding, theContext);
return retVal;
}
@Override
public IHttpRequest createBinaryRequest(FhirContext theContext, IBaseBinary theBinary) {
Entity<String> entity = Entity.entity(theBinary.getContentAsBase64(), theBinary.getContentType());
JaxRsHttpRequest retVal = createHttpRequest(entity);
addHeadersToRequest(retVal, null, theContext);
return retVal;
}
@Override
public IHttpRequest createGetRequest(FhirContext theContext, EncodingEnum theEncoding) {
JaxRsHttpRequest result = createHttpRequest(null);
addHeadersToRequest(result, theEncoding, theContext);
return result;
}
public void addHeadersToRequest(JaxRsHttpRequest theHttpRequest, EncodingEnum theEncoding, FhirContext theContext) {
if (myHeaders != null) {
for (Header next : myHeaders) {
theHttpRequest.addHeader(next.getName(), next.getValue());
}
}
theHttpRequest.addHeader("User-Agent", HttpClientUtil.createUserAgentString(theContext, "jax-rs"));
theHttpRequest.addHeader("Accept-Charset", "utf-8");
Builder request = theHttpRequest.getRequest();
request.acceptEncoding("gzip");
RestfulServerUtils.addAcceptHeaderToRequest(theEncoding, theHttpRequest, theContext);
}
private JaxRsHttpRequest createHttpRequest(Entity<?> entity) {
Builder request = myClient.target(myUrl.toString()).request();
JaxRsHttpRequest result = new JaxRsHttpRequest(request, myRequestType, entity);
addHeaderIfNoneExist(result);
return result;
}
private void addHeaderIfNoneExist(IHttpRequest result) {
if (myIfNoneExistParams != null) {
StringBuilder b = newHeaderBuilder(myUrl);
BaseHttpClientInvocation.appendExtraParamsWithQuestionMark(myIfNoneExistParams, b, b.indexOf("?") == -1);
result.addHeader(Constants.HEADER_IF_NONE_EXIST, b.toString());
}
if (myIfNoneExistString != null) {
StringBuilder b = newHeaderBuilder(myUrl);
b.append(b.indexOf("?") == -1 ? '?' : '&');
b.append(myIfNoneExistString.substring(myIfNoneExistString.indexOf('?') + 1));
result.addHeader(Constants.HEADER_IF_NONE_EXIST, b.toString());
}
}
private StringBuilder newHeaderBuilder(StringBuilder theUrlBase) {
StringBuilder b = new StringBuilder();
b.append(theUrlBase);
if (theUrlBase.length() > 0 && theUrlBase.charAt(theUrlBase.length() - 1) == '/') {
b.deleteCharAt(b.length() - 1);
}
return b;
}
}