package ca.uhn.fhir.rest.client.apache;
/*-
* #%L
* HAPI FHIR - Core Library
* %%
* 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 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.*;
import ca.uhn.fhir.rest.server.*;
public abstract class BaseHttpClient implements IHttpClient {
private final List<Header> myHeaders;
private final Map<String, List<String>> myIfNoneExistParams;
private final String myIfNoneExistString;
protected final RequestTypeEnum myRequestType;
protected final StringBuilder myUrl;
/**
* Constructor
*/
public BaseHttpClient(StringBuilder theUrl, Map<String, List<String>> theIfNoneExistParams, String theIfNoneExistString, RequestTypeEnum theRequestType, List<Header> theHeaders) {
this.myUrl = theUrl;
this.myIfNoneExistParams = theIfNoneExistParams;
this.myIfNoneExistString = theIfNoneExistString;
this.myRequestType = theRequestType;
this.myHeaders = theHeaders;
}
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());
}
}
public void addHeadersToRequest(IHttpRequest 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, "apache"));
theHttpRequest.addHeader("Accept-Charset", "utf-8");
theHttpRequest.addHeader("Accept-Encoding", "gzip");
addHeaderIfNoneExist(theHttpRequest);
RestfulServerUtils.addAcceptHeaderToRequest(theEncoding, theHttpRequest, theContext);
}
@Override
public IHttpRequest createBinaryRequest(FhirContext theContext, IBaseBinary theBinary) {
byte[] content = theBinary.getContent();
IHttpRequest retVal = createHttpRequest(content);
addHeadersToRequest(retVal, null, theContext);
retVal.addHeader(Constants.HEADER_CONTENT_TYPE, theBinary.getContentType());
return retVal;
}
@Override
public IHttpRequest createByteRequest(FhirContext theContext, String theContents, String theContentType, EncodingEnum theEncoding) {
IHttpRequest retVal = createHttpRequest(theContents);
addHeadersToRequest(retVal, theEncoding, theContext);
retVal.addHeader(Constants.HEADER_CONTENT_TYPE, theContentType + Constants.HEADER_SUFFIX_CT_UTF_8);
return retVal;
}
@Override
public IHttpRequest createGetRequest(FhirContext theContext, EncodingEnum theEncoding) {
IHttpRequest retVal = createHttpRequest();
addHeadersToRequest(retVal, theEncoding, theContext);
return retVal;
}
protected abstract IHttpRequest createHttpRequest();
protected abstract IHttpRequest createHttpRequest(byte[] theContent);
protected abstract IHttpRequest createHttpRequest(Map<String, List<String>> theParams);
protected abstract IHttpRequest createHttpRequest(String theContents);
@Override
public IHttpRequest createParamRequest(FhirContext theContext, Map<String, List<String>> theParams, EncodingEnum theEncoding) {
IHttpRequest retVal = createHttpRequest(theParams);
addHeadersToRequest(retVal, theEncoding, theContext);
return retVal;
}
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;
}
}