src/main/java/org/efaps/ui/servlet/CheckoutServlet.java
@Override
    protected void doGet(final HttpServletRequest _req,
                         final HttpServletResponse _res)
        throws ServletException
    {
        final String oid = _req.getParameter(CheckoutServlet.PARAM_OID);

        try {
            final Instance instance = Instance.get(oid);
            if (instance.isValid()) {
                final Checkout checkout = new Checkout(instance);
                final InputStream input = checkout.execute();
                _res.setContentType(this.getServletContext().getMimeType(
                                checkout.getFileName()));
                _res.setContentLength((int) checkout.getFileLength());
                _res.addHeader("Content-Disposition", "inline; filename=\""
                                + checkout.getFileName() + "\"");
                IOUtils.copy(input, _res.getOutputStream());
            }
        } catch (final IOException e) {
            throw new ServletException(e);
        } catch (final EFapsException e) {
            throw new ServletException(e);
        }
    }
@Override
    protected void doGet(final HttpServletRequest _req,
                         final HttpServletResponse _res)
        throws ServletException
    {
        final String oid = _req.getParameter(CheckoutServlet.PARAM_OID);

        try {
            final Instance instance = Instance.get(oid);
            if (instance.isValid()) {
                final Checkout checkout = new Checkout(instance);
                final InputStream input = checkout.execute();
                _res.setContentType(this.getServletContext().getMimeType(
                                checkout.getFileName()));
                _res.setContentLength((int) checkout.getFileLength());
                _res.addHeader("Content-Disposition", "inline; filename=\""
                                + checkout.getFileName() + "\"");
                IOUtils.copy(input, _res.getOutputStream());
            }
        } catch (final IOException e) {
            throw new ServletException(e);
        } catch (final EFapsException e) {
            throw new ServletException(e);
        }
    }
The method checks the file from the object out and returns them
in a output stream to the web client. The object
id must be given with paramter {@link #PARAM_OID}.<br/>

@param _req request variable
@param _res response variable
@throws ServletException on error