/* * 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.commons.net.whois; import java.io.IOException; import java.io.InputStream; import org.apache.commons.net.finger.FingerClient; /*** * The WhoisClient class implements the client side of the Internet Whois * Protocol defined in RFC 954. To query a host you create a * WhoisClient instance, connect to the host, query the host, and finally * disconnect from the host. If the whois service you want to query is on * a non-standard port, connect to the host at that port. * Here's a sample use: *
* WhoisClient whois; * * whois = new WhoisClient(); * * try { * whois.connect(WhoisClient.DEFAULT_HOST); * System.out.println(whois.query("foobar")); * whois.disconnect(); * } catch(IOException e) { * System.err.println("Error I/O exception: " + e.getMessage()); * return; * } ** *
*
* @author Daniel F. Savarese
***/
public final class WhoisClient extends FingerClient
{
/***
* The default whois host to query. It is set to whois.internic.net.
***/
public static final String DEFAULT_HOST = "whois.internic.net";
/***
* The default whois port. It is set to 43 according to RFC 954.
***/
public static final int DEFAULT_PORT = 43;
/***
* The default whois constructor. Initializes the
* default port to DEFAULT_PORT
.
***/
public WhoisClient()
{
setDefaultPort(DEFAULT_PORT);
}
/***
* Queries the connected whois server for information regarding
* the given handle. It is up to the programmer to be familiar with the
* handle syntax of the whois server. You must first connect to a whois
* server before calling this method, and you should disconnect afterward.
*
* @param handle The handle to lookup. * @return The result of the whois query. * @exception IOException If an I/O error occurs during the operation. ***/ public String query(String handle) throws IOException { return query(false, handle); } /*** * Queries the connected whois server for information regarding * the given handle and returns the InputStream of the network connection. * It is up to the programmer to be familiar with the handle syntax * of the whois server. You must first connect to a finger server before * calling this method, and you should disconnect after finishing reading * the stream. *
* @param handle The handle to lookup. * @return The InputStream of the network connection of the whois query. * Can be read to obtain whois results. * @exception IOException If an I/O error occurs during the operation. ***/ public InputStream getInputStream(String handle) throws IOException { return getInputStream(false, handle); } }