| /* |
| * 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.guacamole.tunnel.websocket; |
| |
| import com.google.inject.Provider; |
| import com.google.inject.servlet.ServletModule; |
| import java.util.Arrays; |
| import javax.websocket.DeploymentException; |
| import javax.websocket.server.ServerContainer; |
| import javax.websocket.server.ServerEndpointConfig; |
| import org.apache.guacamole.tunnel.TunnelLoader; |
| import org.apache.guacamole.tunnel.TunnelRequestService; |
| import org.slf4j.Logger; |
| import org.slf4j.LoggerFactory; |
| |
| /** |
| * Loads the JSR-356 WebSocket tunnel implementation. |
| */ |
| public class WebSocketTunnelModule extends ServletModule implements TunnelLoader { |
| |
| /** |
| * Logger for this class. |
| */ |
| private final Logger logger = LoggerFactory.getLogger(WebSocketTunnelModule.class); |
| |
| @Override |
| public boolean isSupported() { |
| |
| try { |
| |
| // Attempt to find WebSocket servlet |
| Class.forName("javax.websocket.Endpoint"); |
| |
| // Support found |
| return true; |
| |
| } |
| |
| // If no such servlet class, this particular WebSocket support |
| // is not present |
| catch (ClassNotFoundException e) {} |
| catch (NoClassDefFoundError e) {} |
| |
| // Support not found |
| return false; |
| |
| } |
| |
| @Override |
| public void configureServlets() { |
| |
| logger.info("Loading JSR-356 WebSocket support..."); |
| |
| // Get container |
| ServerContainer container = (ServerContainer) getServletContext().getAttribute("javax.websocket.server.ServerContainer"); |
| if (container == null) { |
| logger.warn("ServerContainer attribute required by JSR-356 is missing. Cannot load JSR-356 WebSocket support."); |
| return; |
| } |
| |
| Provider<TunnelRequestService> tunnelRequestServiceProvider = getProvider(TunnelRequestService.class); |
| |
| // Build configuration for WebSocket tunnel |
| ServerEndpointConfig config = |
| ServerEndpointConfig.Builder.create(RestrictedGuacamoleWebSocketTunnelEndpoint.class, "/websocket-tunnel") |
| .configurator(new RestrictedGuacamoleWebSocketTunnelEndpoint.Configurator(tunnelRequestServiceProvider)) |
| .subprotocols(Arrays.asList(new String[]{"guacamole"})) |
| .build(); |
| |
| try { |
| |
| // Add configuration to container |
| container.addEndpoint(config); |
| |
| } |
| catch (DeploymentException e) { |
| logger.error("Unable to deploy WebSocket tunnel.", e); |
| } |
| |
| } |
| |
| } |