Java tutorial
/** * Copyright 2013 Sean Kavanagh - sean.p.kavanagh6@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 com.ec2box.manage.socket; import com.ec2box.manage.db.UserDB; import com.google.gson.Gson; import com.ec2box.common.util.AppConfig; import com.ec2box.common.util.AuthUtil; import com.ec2box.manage.action.SecureShellAction; import com.ec2box.manage.model.SchSession; import com.ec2box.manage.model.UserSchSessions; import com.ec2box.manage.task.SentOutputTask; import com.ec2box.manage.util.SessionOutputUtil; import org.apache.commons.lang3.StringUtils; import org.slf4j.Logger; import org.slf4j.LoggerFactory; import javax.servlet.http.HttpSession; import javax.websocket.*; import javax.websocket.server.ServerEndpoint; import java.io.IOException; import java.util.ArrayList; import java.util.HashMap; import java.util.Map; /** * class to run commands and start thread to send web socket terminal output */ @ServerEndpoint(value = "/admin/terms.ws", configurator = GetHttpSessionConfigurator.class) @SuppressWarnings("unchecked") public class SecureShellWS { private static Logger log = LoggerFactory.getLogger(SecureShellWS.class); private HttpSession httpSession; private Session session; private Long sessionId = null; @OnOpen public void onOpen(Session session, EndpointConfig config) { //set websocket timeout if (StringUtils.isNotEmpty(AppConfig.getProperty("websocketTimeout"))) { session.setMaxIdleTimeout(Long.parseLong(AppConfig.getProperty("websocketTimeout")) * 60000); } else { session.setMaxIdleTimeout(0); } this.httpSession = (HttpSession) config.getUserProperties().get(HttpSession.class.getName()); this.sessionId = AuthUtil.getSessionId(httpSession); this.session = session; Runnable run = new SentOutputTask(sessionId, session, UserDB.getUser(AuthUtil.getUserId(httpSession))); Thread thread = new Thread(run); thread.start(); } @OnMessage public void onMessage(String message) { if (session.isOpen() && StringUtils.isNotEmpty(message)) { Map jsonRoot = new Gson().fromJson(message, Map.class); String command = (String) jsonRoot.get("command"); Integer keyCode = null; Double keyCodeDbl = (Double) jsonRoot.get("keyCode"); if (keyCodeDbl != null) { keyCode = keyCodeDbl.intValue(); } for (String idStr : (ArrayList<String>) jsonRoot.get("id")) { Integer id = Integer.parseInt(idStr); //get servletRequest.getSession() for user UserSchSessions userSchSessions = SecureShellAction.getUserSchSessionMap().get(sessionId); if (userSchSessions != null) { SchSession schSession = userSchSessions.getSchSessionMap().get(id); if (keyCode != null) { if (keyMap.containsKey(keyCode)) { try { schSession.getCommander().write(keyMap.get(keyCode)); } catch (IOException ex) { log.error(ex.toString(), ex); } } } else { schSession.getCommander().print(command); } } } //update timeout AuthUtil.setTimeout(httpSession); } } @OnClose public void onClose() { if (SecureShellAction.getUserSchSessionMap() != null) { UserSchSessions userSchSessions = SecureShellAction.getUserSchSessionMap().get(sessionId); if (userSchSessions != null) { Map<Integer, SchSession> schSessionMap = userSchSessions.getSchSessionMap(); for (Map.Entry<Integer, SchSession> entry : schSessionMap.entrySet()) { Integer sessionKey = entry.getKey(); SchSession schSession = entry.getValue(); //disconnect ssh session schSession.getChannel().disconnect(); schSession.getSession().disconnect(); schSession.setChannel(null); schSession.setSession(null); schSession.setInputToChannel(null); schSession.setCommander(null); schSession.setOutFromChannel(null); //remove from map schSessionMap.remove(sessionKey); } //clear and remove session map for user schSessionMap.clear(); SecureShellAction.getUserSchSessionMap().remove(sessionId); SessionOutputUtil.removeUserSession(sessionId); } } } /** * Maps key press events to the ascii values */ static Map<Integer, byte[]> keyMap = new HashMap<>(); static { //ESC keyMap.put(27, new byte[] { (byte) 0x1b }); //ENTER keyMap.put(13, new byte[] { (byte) 0x0d }); //LEFT keyMap.put(37, new byte[] { (byte) 0x1b, (byte) 0x4f, (byte) 0x44 }); //UP keyMap.put(38, new byte[] { (byte) 0x1b, (byte) 0x4f, (byte) 0x41 }); //RIGHT keyMap.put(39, new byte[] { (byte) 0x1b, (byte) 0x4f, (byte) 0x43 }); //DOWN keyMap.put(40, new byte[] { (byte) 0x1b, (byte) 0x4f, (byte) 0x42 }); //BS keyMap.put(8, new byte[] { (byte) 0x7f }); //TAB keyMap.put(9, new byte[] { (byte) 0x09 }); //CTR keyMap.put(17, new byte[] {}); //DEL keyMap.put(46, "\033[3~".getBytes()); //CTR-A keyMap.put(65, new byte[] { (byte) 0x01 }); //CTR-B keyMap.put(66, new byte[] { (byte) 0x02 }); //CTR-C keyMap.put(67, new byte[] { (byte) 0x03 }); //CTR-D keyMap.put(68, new byte[] { (byte) 0x04 }); //CTR-E keyMap.put(69, new byte[] { (byte) 0x05 }); //CTR-F keyMap.put(70, new byte[] { (byte) 0x06 }); //CTR-G keyMap.put(71, new byte[] { (byte) 0x07 }); //CTR-H keyMap.put(72, new byte[] { (byte) 0x08 }); //CTR-I keyMap.put(73, new byte[] { (byte) 0x09 }); //CTR-J keyMap.put(74, new byte[] { (byte) 0x0A }); //CTR-K keyMap.put(75, new byte[] { (byte) 0x0B }); //CTR-L keyMap.put(76, new byte[] { (byte) 0x0C }); //CTR-M keyMap.put(77, new byte[] { (byte) 0x0D }); //CTR-N keyMap.put(78, new byte[] { (byte) 0x0E }); //CTR-O keyMap.put(79, new byte[] { (byte) 0x0F }); //CTR-P keyMap.put(80, new byte[] { (byte) 0x10 }); //CTR-Q keyMap.put(81, new byte[] { (byte) 0x11 }); //CTR-R keyMap.put(82, new byte[] { (byte) 0x12 }); //CTR-S keyMap.put(83, new byte[] { (byte) 0x13 }); //CTR-T keyMap.put(84, new byte[] { (byte) 0x14 }); //CTR-U keyMap.put(85, new byte[] { (byte) 0x15 }); //CTR-V keyMap.put(86, new byte[] { (byte) 0x16 }); //CTR-W keyMap.put(87, new byte[] { (byte) 0x17 }); //CTR-X keyMap.put(88, new byte[] { (byte) 0x18 }); //CTR-Y keyMap.put(89, new byte[] { (byte) 0x19 }); //CTR-Z keyMap.put(90, new byte[] { (byte) 0x1A }); //CTR-[ keyMap.put(219, new byte[] { (byte) 0x1B }); //CTR-] keyMap.put(221, new byte[] { (byte) 0x1D }); //INSERT keyMap.put(45, "\033[2~".getBytes()); //PG UP keyMap.put(33, "\033[5~".getBytes()); //PG DOWN keyMap.put(34, "\033[6~".getBytes()); //END keyMap.put(35, "\033[4~".getBytes()); //HOME keyMap.put(36, "\033[1~".getBytes()); } }