Java tutorial
/* * Copyright: (c) 2004-2011 Mayo Foundation for Medical Education and * Research (MFMER). All rights reserved. MAYO, MAYO CLINIC, and the * triple-shield Mayo logo are trademarks and service marks of MFMER. * * Except as contained in the copyright notice above, or as used to identify * MFMER as the author of this software, the trade names, trademarks, service * marks, or product names of the copyright holder shall not be used in * advertising, promotion or otherwise in connection with this software without * prior written authorization of the copyright holder. * * 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 edu.mayo.cts2.framework.plugin.namespace.ui.osgi; import java.io.IOException; import java.io.InputStream; import javax.annotation.Resource; import javax.servlet.GenericServlet; import javax.servlet.ServletException; import javax.servlet.ServletRequest; import javax.servlet.ServletResponse; import javax.servlet.http.HttpServletRequest; import javax.servlet.http.HttpServletResponse; import org.apache.commons.io.IOUtils; import org.osgi.service.http.HttpService; import org.springframework.beans.factory.InitializingBean; /** * A simple Servlet for serving up static content. * * @author <a href="mailto:kevin.peterson@mayo.edu">Kevin Peterson</a> */ public class StaticHttpService extends GenericServlet implements InitializingBean { private static final long serialVersionUID = -420835724412643550L; @Resource private HttpService httpService; @Override public void afterPropertiesSet() throws Exception { this.httpService.registerServlet("/namespaces", this, null, null); this.httpService.registerResources("/namespaces/resources", "/web/resources", null); } /* (non-Javadoc) * @see javax.servlet.GenericServlet#service(javax.servlet.ServletRequest, javax.servlet.ServletResponse) */ public void service(final ServletRequest req, final ServletResponse res) throws ServletException, IOException { // don't really expect to be called within a non-HTTP environment service((HttpServletRequest) req, (HttpServletResponse) res); // ensure response has been sent back and response is committed // (we are authorative for our URL space and no other servlet should // interfere) res.flushBuffer(); } /** * Service the request. The only path recognized by this servlet is * \/editor/console - all others will be delegated to OSGi resource handling. * * @param request the request * @param response the response * @throws ServletException the servlet exception * @throws IOException Signals that an I/O exception has occurred. */ private void service(HttpServletRequest request, HttpServletResponse response) throws ServletException, IOException { // check whether we are not at .../{webManagerRoot} final String pathInfo = request.getPathInfo(); if (pathInfo.equals("/console")) { InputStream in = this.getClass().getResourceAsStream("/web/index.html"); response.setContentType("text/html"); IOUtils.copy(in, response.getWriter()); } } }