Metacat

    /** Handle "PUT" method requests from HTTP clients */

    @Override

    protected void doHead(HttpServletRequest request,

            HttpServletResponse response) throws ServletException, IOException {

        System.out.println("HTTP Verb: HEAD");

        handler = new ResourceHandler(getServletContext(), request, response);

        handler.handle(ResourceHandler.HEAD);

    }

    /**HTTP Verb HEAD*/

    public static final byte HEAD = 5;

            		} else if (httpVerb == HEAD) {

            		    describeObject(objectId);

            		    status = true;

            	        status = true;

     * MN_crud.describe()

     * http://mule1.dataone.org/ArchitectureDocs/mn_api_crud.html#MN_crud.describe

     * @param guid

     */

    private void describeObject(String guid)

    {

        Logger logMetacat = Logger.getLogger(ResourceHandler.class);

        OutputStream out = null;

        try

        {

            out = response.getOutputStream();

        }

        catch(Exception e)

        {

            logMetacat.error("Error getting output stream in ResourceHandler.describeObject: " + e.getMessage());

            return;

        }

        response.setStatus(200);

        response.setContentType("text/xml");

        AuthToken token = new AuthToken(sessionId);

        CrudService cs = CrudService.getInstance();

        Identifier id = new Identifier();

        id.setValue(guid);

        try

        {

            DescribeResponse dr = cs.describe(token, id);

            DateFormat dateFormat = new SimpleDateFormat("yyyy-MM-dd'T'hh:mm:ss.SZ");

            response.addHeader("guid", guid);

            response.addHeader("checksum", dr.getDataONE_Checksum().getValue());

            response.addHeader("content_length", dr.getContent_Length() + "");

            response.addHeader("last_modified", dateFormat.format(dr.getLast_Modified()));

            response.addHeader("format", dr.getDataONE_ObjectFormat().toString());

        }

        catch(InvalidRequest ir)

        {

            serializeException(ir, out);

        }

        catch(NotImplemented ni)

        {

            serializeException(ni, out);

        }

        catch(NotAuthorized na)

        {

            serializeException(na, out);

        }

        catch(ServiceFailure sf)

        {

            serializeException(sf, out);

        }

        catch(NotFound nf)

        {

            serializeException(nf, out);

        }

        catch(InvalidToken it)

        {

            serializeException(it, out);

        }

    }

    /**