| // |
| // ======================================================================== |
| // Copyright (c) 1995-2017 Mort Bay Consulting Pty. Ltd. |
| // ------------------------------------------------------------------------ |
| // All rights reserved. This program and the accompanying materials |
| // are made available under the terms of the Eclipse Public License v1.0 |
| // and Apache License v2.0 which accompanies this distribution. |
| // |
| // The Eclipse Public License is available at |
| // http://www.eclipse.org/legal/epl-v10.html |
| // |
| // The Apache License v2.0 is available at |
| // http://www.opensource.org/licenses/apache2.0.php |
| // |
| // You may elect to redistribute this code under either of these licenses. |
| // ======================================================================== |
| // |
| |
| package org.eclipse.jetty.rhttp.gateway; |
| |
| 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.eclipse.jetty.rhttp.client.RHTTPRequest; |
| import org.eclipse.jetty.util.log.Log; |
| import org.eclipse.jetty.util.log.Logger; |
| |
| /** |
| * The servlet that handles external requests. |
| * |
| * @version $Revision$ $Date$ |
| */ |
| public class ExternalServlet extends HttpServlet |
| { |
| private final Logger logger = Log.getLogger(getClass().toString()); |
| private final Gateway gateway; |
| private TargetIdRetriever targetIdRetriever; |
| |
| public ExternalServlet(Gateway gateway, TargetIdRetriever targetIdRetriever) |
| { |
| this.gateway = gateway; |
| this.targetIdRetriever = targetIdRetriever; |
| } |
| |
| public TargetIdRetriever getTargetIdRetriever() |
| { |
| return targetIdRetriever; |
| } |
| |
| public void setTargetIdRetriever(TargetIdRetriever targetIdRetriever) |
| { |
| this.targetIdRetriever = targetIdRetriever; |
| } |
| |
| @Override |
| protected void service(HttpServletRequest httpRequest, HttpServletResponse httpResponse) throws ServletException, IOException |
| { |
| logger.debug("External http request: {}", httpRequest.getRequestURL()); |
| |
| String targetId = targetIdRetriever.retrieveTargetId(httpRequest); |
| if (targetId == null) |
| throw new ServletException("Invalid request to " + getClass().getSimpleName() + ": " + httpRequest.getRequestURI()); |
| |
| ClientDelegate client = gateway.getClientDelegate(targetId); |
| if (client == null) throw new ServletException("Client with targetId " + targetId + " is not connected"); |
| |
| ExternalRequest externalRequest = gateway.newExternalRequest(httpRequest, httpResponse); |
| RHTTPRequest request = externalRequest.getRequest(); |
| ExternalRequest existing = gateway.addExternalRequest(request.getId(), externalRequest); |
| assert existing == null; |
| logger.debug("External request {} for device {}", request, targetId); |
| |
| boolean delivered = client.enqueue(request); |
| if (delivered) |
| { |
| externalRequest.suspend(); |
| } |
| else |
| { |
| // TODO: improve this: we can temporarly queue this request elsewhere and wait for the client to reconnect ? |
| throw new ServletException("Could not enqueue request to client with targetId " + targetId); |
| } |
| } |
| } |