| /* |
| * Licensed to the Apache Software Foundation (ASF) under one |
| * or more contributor license agreements. See the NOTICE file |
| * distributed with this work for additional information |
| * regarding copyright ownership. The ASF licenses this file |
| * to you 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.apache.tuscany.sca.binding.http.provider; |
| |
| import java.io.IOException; |
| import java.io.InputStream; |
| import java.io.OutputStream; |
| import java.net.URLDecoder; |
| |
| import javax.servlet.ServletException; |
| import javax.servlet.http.HttpServlet; |
| import javax.servlet.http.HttpServletRequest; |
| import javax.servlet.http.HttpServletResponse; |
| |
| import org.apache.tuscany.sca.invocation.Invoker; |
| import org.apache.tuscany.sca.invocation.Message; |
| import org.apache.tuscany.sca.invocation.MessageFactory; |
| |
| /** |
| * Servlet responsible for dispatching HTTP GET requests to the |
| * target component implementation. |
| * |
| * @version $Rev$ $Date$ |
| */ |
| public class HTTPGetListenerServlet extends HttpServlet { |
| private static final long serialVersionUID = 2865466417329430610L; |
| |
| private MessageFactory messageFactory; |
| private Invoker getInvoker; |
| |
| /** |
| * Constructs a new HTTPServiceListenerServlet. |
| */ |
| public HTTPGetListenerServlet(Invoker getInvoker, MessageFactory messageFactory) { |
| this.getInvoker = getInvoker; |
| this.messageFactory = messageFactory; |
| } |
| |
| @Override |
| protected void doGet(HttpServletRequest request, HttpServletResponse response) throws ServletException, IOException { |
| |
| // Get the request path |
| String path = URLDecoder.decode(request.getRequestURI().substring(request.getServletPath().length()), "UTF-8"); |
| if (path.length() ==0) { |
| |
| // Redirect to a URL ending with / to make relative hrefs work |
| // relative to the served resource. |
| response.sendRedirect(request.getRequestURL().append('/').toString()); |
| return; |
| } |
| |
| // Invoke the get operation on the service implementation |
| Message requestMessage = messageFactory.createMessage(); |
| String id = path.substring(1); |
| requestMessage.setBody(new Object[] {id}); |
| Message responseMessage = getInvoker.invoke(requestMessage); |
| if (responseMessage.isFault()) { |
| throw new ServletException((Throwable)responseMessage.getBody()); |
| } |
| |
| // Write the response from the service implementation to the response |
| // output stream |
| InputStream is = (InputStream)responseMessage.getBody(); |
| OutputStream os = response.getOutputStream(); |
| byte[] buffer = new byte[2048]; |
| for (;;) { |
| int n = is.read(buffer); |
| if (n <= 0) |
| break; |
| os.write(buffer, 0, n); |
| } |
| os.flush(); |
| os.close(); |
| |
| } |
| |
| } |