/** * 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.zookeeper.client; import org.apache.log4j.Logger; import java.io.BufferedReader; import java.io.IOException; import java.io.InputStreamReader; import java.io.OutputStream; import java.net.Socket; public class FourLetterWordMain { protected static final Logger LOG = Logger.getLogger(FourLetterWordMain.class); /** * Send the 4letterword * @param host the destination host * @param port the destination port * @param cmd the 4letterword * @return server response * @throws java.io.IOException */ public static String send4LetterWord(String host, int port, String cmd) throws IOException { LOG.info("connecting to " + host + " " + port); Socket sock = new Socket(host, port); BufferedReader reader = null; try { OutputStream outstream = sock.getOutputStream(); outstream.write(cmd.getBytes()); outstream.flush(); // this replicates NC - close the output stream before reading sock.shutdownOutput(); reader = new BufferedReader( new InputStreamReader(sock.getInputStream())); StringBuilder sb = new StringBuilder(); String line; while((line = reader.readLine()) != null) { sb.append(line + "\n"); } return sb.toString(); } finally { sock.close(); if (reader != null) { reader.close(); } } } public static void main(String[] args) throws IOException { if (args.length != 3) { System.out.println("Usage: FourLetterWordMain <host> <port> <cmd>"); } else { System.out.println(send4LetterWord(args[0], Integer.parseInt(args[1]), args[2])); } } }