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// $Id$
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/**
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* Copyright (C) 2007 EDIT
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* European Distributed Institute of Taxonomy
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* http://www.e-taxonomy.eu
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*
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* The contents of this file are subject to the Mozilla Public License Version 1.1
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* See LICENSE.TXT at the top of this package for the full license terms.
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*/
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package eu.etaxonomy.cdm.remote.service;
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import io.swagger.annotations.Api;
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import java.io.IOException;
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import java.io.InputStream;
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import java.io.OutputStream;
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import javax.servlet.http.HttpServletResponse;
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import org.springframework.beans.factory.annotation.Autowired;
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import org.springframework.stereotype.Controller;
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import org.springframework.web.bind.WebDataBinder;
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import org.springframework.web.bind.annotation.InitBinder;
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import org.springframework.web.bind.annotation.RequestMapping;
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import org.springframework.web.bind.annotation.RequestMethod;
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import org.springframework.web.bind.annotation.RequestParam;
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import org.springframework.web.servlet.ModelAndView;
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import com.ibm.lsid.LSIDException;
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import com.ibm.lsid.server.LSIDServerException;
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import eu.etaxonomy.cdm.api.service.lsid.LSIDDataService;
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import eu.etaxonomy.cdm.model.common.LSID;
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import eu.etaxonomy.cdm.remote.editor.LSIDPropertyEditor;
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/**
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* Controller which accepts requests for the data representation of an object
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* with a given lsid. The response is written directly into the request, rather
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* than being passed as part of the ModelAndView since data is supposed to be
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* byte-identical and thus cannot be transformed by the view layer.
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*
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* @author ben
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* @author Ben Szekely (<a href="mailto:bhszekel@us.ibm.com">bhszekel@us.ibm.com</a>)
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* @see com.ibm.lsid.server.servlet.DataServlet
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*/
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@Controller
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@Api(value="lsid_authority_data",
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description="Controller which accepts incoming requests to the LSIDDataService.")
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public class DataController {
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private LSIDDataService lsidDataService;
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@Autowired
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public void setLsidDataService(LSIDDataService lsidDataService) {
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this.lsidDataService = lsidDataService;
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}
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@InitBinder
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public void initBinder(WebDataBinder binder) {
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binder.registerCustomEditor(LSID.class, new LSIDPropertyEditor());
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}
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/**
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* Handle requests for the data representation of an object with a given lsid. Can return only part of the
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* data if the length and offset are specified in the request as per the specification.
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*
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* @param LSID lsid the lsid to retrieve data for
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* @param Integer start the offset in bytes to read from
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* @param Integer length the number of bytes to return
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* @return ModelAndView (null)
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* @throws LSIDServerException
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* @throws IOException
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*/
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@RequestMapping(value = "/authority/data.do",params = {"lsid","start","length"}, method = RequestMethod.GET)
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public ModelAndView getData(@RequestParam("lsid") LSID lsid,
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@RequestParam("start") Integer start,
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@RequestParam("length") Integer length,
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HttpServletResponse response) throws LSIDServerException, IOException {
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//FIXME #3811 fix null pointer access of "out" reference
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// OutputStream out = null;
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// InputStream data = null;
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// try {
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// data = lsidDataService.getDataByRange(lsid,start,length);
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// if(data != null) {
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// response.setContentType("application/octet-stream");
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// byte[] bytes = new byte[1024];
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// int numbytes = data.read(bytes);
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// while (numbytes != -1) {
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// out.write(bytes,0,numbytes);
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// numbytes = data.read(bytes);
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// }
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// out.flush();
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// }
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// } finally {
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// if (out != null) {
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// out.close();
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// }
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//
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// if (data != null) {
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// data.close();
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// }
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// }
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return null;
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}
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/**
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* Handle requests for the data representation of an object with a given lsid.
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*
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* @param LSID lsid the lsid to retrieve data for
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* @return ModelAndView (null)
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* @throws LSIDServerException
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* @throws IOException
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*/
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@RequestMapping(value = "/authority/data.do",params = {"lsid"}, method = RequestMethod.GET)
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public ModelAndView getData(@RequestParam("lsid")LSID lsid,
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HttpServletResponse response) throws LSIDServerException, IOException {
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OutputStream out = null;
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InputStream data = null;
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try {
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data = lsidDataService.getData(lsid);
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if(data != null) {
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response.setContentType("application/octet-stream");
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out = response.getOutputStream();
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byte[] bytes = new byte[1024];
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int numbytes = data.read(bytes);
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while (numbytes != -1) {
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out.write(bytes,0,numbytes);
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numbytes = data.read(bytes);
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}
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out.flush();
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}
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} finally {
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if (out != null) {
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out.close();
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}
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if (data != null) {
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data.close();
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}
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}
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return null;
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}
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/**
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* Handle requests for the data representation of an object without an lsid.
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*
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* @throws LSIDServerException
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*/
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@RequestMapping(value = "/authority/data.do", method = RequestMethod.GET)
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public ModelAndView getData() throws LSIDException {
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throw new LSIDException(LSIDException.INVALID_METHOD_CALL, "Must specify HTTP Parameter 'lsid'");
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}
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}
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