ca.uhn.fhir.rest.server.servlet.ServletRestfulResponse.java Source code

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Here is the source code for ca.uhn.fhir.rest.server.servlet.ServletRestfulResponse.java

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package ca.uhn.fhir.rest.server.servlet;

import static org.apache.commons.lang3.StringUtils.isNotBlank;

/*
 * #%L
 * HAPI FHIR - Core Library
 * %%
 * Copyright (C) 2014 - 2016 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.io.IOException;
import java.io.OutputStreamWriter;
import java.io.UnsupportedEncodingException;
import java.io.Writer;
import java.util.Map.Entry;
import java.util.zip.GZIPOutputStream;

import javax.servlet.ServletOutputStream;
import javax.servlet.http.HttpServletResponse;

import org.hl7.fhir.instance.model.api.IBaseBinary;

import ca.uhn.fhir.rest.api.MethodOutcome;
import ca.uhn.fhir.rest.method.ParseAction;
import ca.uhn.fhir.rest.server.Constants;
import ca.uhn.fhir.rest.server.RestfulResponse;

public class ServletRestfulResponse extends RestfulResponse<ServletRequestDetails> {

    public ServletRestfulResponse(ServletRequestDetails servletRequestDetails) {
        super(servletRequestDetails);
    }

    @Override
    public Object sendAttachmentResponse(IBaseBinary bin, int stausCode, String contentType) throws IOException {
        addHeaders();
        HttpServletResponse theHttpResponse = getRequestDetails().getServletResponse();
        theHttpResponse.setStatus(stausCode);
        theHttpResponse.setContentType(contentType);
        if (bin.getContent() == null || bin.getContent().length == 0) {
            return null;
        } else {
            theHttpResponse.setContentLength(bin.getContent().length);
            ServletOutputStream oos = theHttpResponse.getOutputStream();
            oos.write(bin.getContent());
            oos.close();
            return null;
        }
    }

    @Override
    public Writer getResponseWriter(int theStatusCode, String theStatusMessage, String theContentType,
            String theCharset, boolean theRespondGzip) throws UnsupportedEncodingException, IOException {
        addHeaders();
        HttpServletResponse theHttpResponse = getRequestDetails().getServletResponse();
        theHttpResponse.setCharacterEncoding(theCharset);
        theHttpResponse.setStatus(theStatusCode);
        theHttpResponse.setContentType(theContentType);
        if (theRespondGzip) {
            theHttpResponse.addHeader(Constants.HEADER_CONTENT_ENCODING, Constants.ENCODING_GZIP);
            return new OutputStreamWriter(new GZIPOutputStream(theHttpResponse.getOutputStream()),
                    Constants.CHARSET_NAME_UTF8);
        } else {
            return theHttpResponse.getWriter();
        }
    }

    private void addHeaders() {
        HttpServletResponse theHttpResponse = getRequestDetails().getServletResponse();
        getRequestDetails().getServer().addHeadersToResponse(theHttpResponse);
        for (Entry<String, String> header : getHeaders().entrySet()) {
            theHttpResponse.setHeader(header.getKey(), header.getValue());
        }
    }

    @Override
    public final Object sendWriterResponse(int status, String contentType, String charset, Writer writer)
            throws IOException {
        writer.close();
        return null;
    }

    @Override
    public Object returnResponse(ParseAction<?> outcome, int operationStatus, boolean allowPrefer,
            MethodOutcome response, String resourceName) throws IOException {
        addHeaders();
        return getRequestDetails().getServer().returnResponse(getRequestDetails(), outcome, operationStatus,
                allowPrefer, response, resourceName);
    }
}