Java tutorial
/** * Copyright (C) 2015 Born Informatik AG (www.born.ch) * * 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. */ package org.wte4j.examples.showcase.server.services; import java.io.File; import java.io.IOException; import java.util.List; import javax.servlet.ServletException; import javax.servlet.http.HttpServletRequest; import javax.servlet.http.HttpServletResponse; import org.apache.commons.lang3.StringUtils; import org.springframework.beans.factory.annotation.Autowired; import org.springframework.web.context.support.SpringBeanAutowiringSupport; import org.wte4j.examples.showcase.shared.OrderDataDto; import org.wte4j.examples.showcase.shared.service.OrderService; import com.google.common.io.Files; import com.google.gwt.user.server.rpc.RemoteServiceServlet; public class GwtOrderServiceServlet extends RemoteServiceServlet implements OrderService { private static final long serialVersionUID = 1L; private static final String DOCUMENT_CONTENT_TYPE = "application/vnd.openxmlformats-officedocument.wordprocessingml.document"; @Autowired OrderService orderService; public void init() { SpringBeanAutowiringSupport.processInjectionBasedOnCurrentContext(this); } @Override public List<OrderDataDto> listOrderData() { return orderService.listOrderData(); } public List<String> listOrderTemplates() { return orderService.listOrderTemplates(); } public List<String> listDataModel() { return orderService.listDataModel(); } @Override public String createDocument(OrderDataDto order, String documentName) { return orderService.createDocument(order, documentName); } private void sendDocument(File file, HttpServletResponse resp) throws IOException { resp.setContentType(DOCUMENT_CONTENT_TYPE); resp.setHeader("Content-Disposition", "attachment; filename=\"" + file.getName()); Files.copy(file, resp.getOutputStream()); } @Override protected void doGet(HttpServletRequest req, HttpServletResponse resp) throws ServletException, IOException { String fileParameter = req.getParameter("file"); if (StringUtils.isNotEmpty(fileParameter)) { File file = new File(fileParameter); sendDocument(file, resp); file.delete(); } else resp.sendError(HttpServletResponse.SC_BAD_REQUEST); } }