telnet源码例子.doc

/* * 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 * * /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. */import java.io.IOException;import java.io.InputStream;import java.io.OutputStream;import java.io.FileOutputStream;import java.util.StringTokenizer;import .telnet.TelnetClient;import .telnet.TelnetNotificationHandler;import .telnet.SimpleOptionHandler;import .telnet.EchoOptionHandler;import .telnet.TerminalTypeOptionHandler;import .telnet.SuppressGAOptionHandler;import .telnet.InvalidTelnetOptionException;/* * This is a simple example of use of TelnetClient. An external option handler * (SimpleTelnetOptionHandler) is used. Initial configuration requested by * TelnetClient will be: WILL ECHO, WILL SUPPRESS-GA, DO SUPPRESS-GA. VT100 * terminal type will be subnegotiated. * * Also, use of the sendAYT(), getLocalOptionState(), getRemoteOptionState() is * demonstrated. When connected, type AYT to send an AYT command to the server * and see the result. Type OPT to see a report of the state of the first 25 * options. * * * author Bruno DAvanzo */public class TelnetClientExample implements Runnable, TelnetNotificationHandler static TelnetClient tc = null;/* * Main for the TelnetClientExample. */public static void main(String args) throws Exception FileOutputStream fout = null;if (args.length 1) System.err.println(Usage: TelnetClientExample1 );System.exit(1);String remoteip = args0;int remoteport;if (args.length 1) remoteport = (new Integer(args1).intValue(); else remoteport = 23;try fout = new FileOutputStream(spy.log, true); catch (IOException e) System.err.println(Exception while opening the spy file: + e.getMessage();tc = new TelnetClient();TerminalTypeOptionHandler ttopt = new TerminalTypeOptionHandler(VT100, false, false, true, false);EchoOptionHandler echoopt = new EchoOptionHandler(true, false, true,false);SuppressGAOptionHandler gaopt = new SuppressGAOptionHandler(true, true,true, true);try tc.addOptionHandler(ttopt);tc.addOptionHandler(echoopt);tc.addOptionHandler(gaopt); catch (InvalidTelnetOptionException e) System.err.println(Error registering option handlers: + e.getMessage();while (true) boolean end_loop = false;try tc.connect(remoteip, remoteport);Thread reader = new Thread(new TelnetClientExample();tc.registerNotifHandler(new TelnetClientExample();System.out.println(TelnetClientExample);System.out.println(Type AYT to send an AYT telnet command);System.out.println(Type OPT to print a report of status of options (0-24);System.out.println(Type REGISTER to register a new SimpleOptionHandler);System.out.println(Type UNREGISTER to unregister an OptionHandler);System.out.println(Type SPY to register the spy (connect to port 3333 to spy);System.out.println(Type UNSPY to stop spying the connection);reader.start();OutputStream outstr = tc.getOutputStream();byte buff = new byte1024;int ret_read = 0;do try ret_read = System.in.read(buff);if (ret_read 0) if (new String(buff, 0, ret_read).startsWith(AYT) try System.out.println(Sending AYT);System.out.println(AYT response:+ tc.sendAYT(5000); catch (IOException e) System.err.println(Exception waiting AYT response: + e.getMessage(); else if (new String(buff, 0, ret_read).startsWith(OPT) System.out.println(Status of options:);for (int ii = 0; ii 0) & (end_loop = false);try tc.disconnect(); catch (IOException e) System.err.println(Exception while connecting:+ e.getMessage(); catch (IOException e) System.err.println(Exception while connecting:+ e.getMessage();System.exit(1);/* * Callback method called when TelnetClient receives an option negotiation * command. * * * param negotiation_code * - type of negotiation command received (RECEIVED_DO, * RECEIVED_DONT, RECEIVED_WILL, RECEIVED_WONT) * * param option_code * - code of the option negotiated * */ Overridepublic void receivedNegotiation(int negotiation_code, int option_code) String command = null;if (negotiation_code = TelnetNotificationHandler.RECEIVED_DO) command = DO; else if (negotiation_code = TelnetNotificationHandler.RECEIVED_DONT) command = DONT; else if (negotiation_code = TelnetNotificationHandler.RECEIVED_WILL) command = WILL; else if (negotiation_code = TelnetNotificationHandler.RECEIVED_WONT) command = WONT;System.out.println(Received + command + for option code + option_code);/* * Reader thread. Reads lines from the TelnetClient and echoes them on the * screen. */ Overridepublic void run() InputStream instr = tc.getInputStream();try byte buff = new byte1024;int ret_read = 0;do ret_read = instr.read(buff);if (r