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Commons Net example source code file (finger.java)
The Commons Net finger.java source code/* * 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 examples.unix; import java.io.IOException; import java.net.InetAddress; import java.net.UnknownHostException; import org.apache.commons.net.finger.FingerClient; /*** * This is an example of how you would implement the finger command * in Java using NetComponents. The Java version is much shorter. * But keep in mind that the Unix finger command reads all sorts of * local files to output local finger information. This program only * queries the finger daemon. * <p> * The -l flag is used to request long output from the server. * <p> ***/ public final class finger { public static final void main(String[] args) { boolean longOutput = false; int arg = 0, index; String handle, host; FingerClient finger; InetAddress address = null; // Get flags. If an invalid flag is present, exit with usage message. while (arg < args.length && args[arg].startsWith("-")) { if (args[arg].equals("-l")) longOutput = true; else { System.err.println("usage: finger [-l] [[[handle][@<server>]] ...]"); System.exit(1); } ++arg; } finger = new FingerClient(); // We want to timeout if a response takes longer than 60 seconds finger.setDefaultTimeout(60000); if (arg >= args.length) { // Finger local host try { address = InetAddress.getLocalHost(); } catch (UnknownHostException e) { System.err.println("Error unknown host: " + e.getMessage()); System.exit(1); } try { finger.connect(address); System.out.print(finger.query(longOutput)); finger.disconnect(); } catch (IOException e) { System.err.println("Error I/O exception: " + e.getMessage()); System.exit(1); } return ; } // Finger each argument while (arg < args.length) { index = args[arg].lastIndexOf("@"); if (index == -1) { handle = args[arg]; try { address = InetAddress.getLocalHost(); } catch (UnknownHostException e) { System.err.println("Error unknown host: " + e.getMessage()); System.exit(1); } } else { handle = args[arg].substring(0, index); host = args[arg].substring(index + 1); try { address = InetAddress.getByName(host); System.out.println("[" + address.getHostName() + "]"); } catch (UnknownHostException e) { System.err.println("Error unknown host: " + e.getMessage()); System.exit(1); } } try { finger.connect(address); System.out.print(finger.query(longOutput, handle)); finger.disconnect(); } catch (IOException e) { System.err.println("Error I/O exception: " + e.getMessage()); System.exit(1); } ++arg; if (arg != args.length) System.out.print("\n"); } } } Other Commons Net examples (source code examples)Here is a short list of links related to this Commons Net finger.java source code file: |
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