Java tutorial
/** * Copyright (C) 2010 - 2014 VREM Software Development <VREMSoftwareDevelopment@gmail.com> * * 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 ca.travelagency.webservice; import java.io.IOException; import javax.servlet.ServletException; import javax.servlet.http.HttpServlet; import javax.servlet.http.HttpServletRequest; import javax.servlet.http.HttpServletResponse; import org.springframework.beans.factory.annotation.Autowired; import org.springframework.stereotype.Component; import ca.travelagency.identity.AuthenticationException; import ca.travelagency.identity.SystemUser; import ca.travelagency.identity.SystemUserService; import ca.travelagency.utils.AutowiredUtils; import ca.travelagency.utils.JsonUtils; import ca.travelagency.utils.StringUtils; @Component public class SampleWebservice extends HttpServlet { private static final long serialVersionUID = 1L; public static final String USERNAME = "USERNAME"; public static final String PASSWORD = "PASSWORD"; @Autowired private SystemUserService systemUserService; @Override public void init() throws ServletException { AutowiredUtils.autowire(getServletConfig().getServletContext(), this); } @Override protected void doGet(HttpServletRequest request, HttpServletResponse response) throws ServletException, IOException { String username = request.getParameter(USERNAME); String password = request.getParameter(PASSWORD); if (StringUtils.isBlank(username) || StringUtils.isBlank(password)) { response.setStatus(HttpServletResponse.SC_FORBIDDEN); return; } try { SystemUser systemUser = systemUserService.authorize(username, password); new JsonUtils().serialize(systemUser.getId(), response.getWriter()); } catch (AuthenticationException e) { response.setStatus(HttpServletResponse.SC_NOT_FOUND); } } void setSystemUserService(SystemUserService systemUserService) { this.systemUserService = systemUserService; } }