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| org.apache.commons.net.WhoisClient |
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| 1 | /* |
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| 2 | * Copyright 2001-2005 The Apache Software Foundation |
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| 3 | * |
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| 4 | * Licensed under the Apache License, Version 2.0 (the "License"); |
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| 5 | * you may not use this file except in compliance with the License. |
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| 6 | * You may obtain a copy of the License at |
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| 7 | * |
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| 8 | * http://www.apache.org/licenses/LICENSE-2.0 |
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| 9 | * |
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| 10 | * Unless required by applicable law or agreed to in writing, software |
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| 11 | * distributed under the License is distributed on an "AS IS" BASIS, |
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| 12 | * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. |
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| 13 | * See the License for the specific language governing permissions and |
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| 14 | * limitations under the License. |
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| 15 | */ |
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| 16 | package org.apache.commons.net; |
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| 17 | ||
| 18 | import java.io.IOException; |
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| 19 | import java.io.InputStream; |
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| 20 | ||
| 21 | /*** |
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| 22 | * The WhoisClient class implements the client side of the Internet Whois |
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| 23 | * Protocol defined in RFC 954. To query a host you create a |
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| 24 | * WhoisClient instance, connect to the host, query the host, and finally |
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| 25 | * disconnect from the host. If the whois service you want to query is on |
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| 26 | * a non-standard port, connect to the host at that port. |
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| 27 | * Here's a sample use: |
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| 28 | * <pre> |
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| 29 | * WhoisClient whois; |
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| 30 | * |
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| 31 | * whois = new WhoisClient(); |
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| 32 | * |
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| 33 | * try { |
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| 34 | * whois.connect(WhoisClient.DEFAULT_HOST); |
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| 35 | * System.out.println(whois.query("foobar")); |
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| 36 | * whois.disconnect(); |
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| 37 | * } catch(IOException e) { |
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| 38 | * System.err.println("Error I/O exception: " + e.getMessage()); |
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| 39 | * return; |
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| 40 | * } |
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| 41 | * </pre> |
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| 42 | * |
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| 43 | * <p> |
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| 44 | * <p> |
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| 45 | * @author Daniel F. Savarese |
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| 46 | ***/ |
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| 47 | ||
| 48 | public final class WhoisClient extends FingerClient |
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| 49 | { |
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| 50 | /*** |
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| 51 | * The default whois host to query. It is set to whois.internic.net. |
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| 52 | ***/ |
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| 53 | public static final String DEFAULT_HOST = "whois.internic.net"; |
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| 54 | ||
| 55 | /*** |
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| 56 | * The default whois port. It is set to 43 according to RFC 954. |
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| 57 | ***/ |
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| 58 | public static final int DEFAULT_PORT = 43; |
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| 59 | ||
| 60 | ||
| 61 | /*** |
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| 62 | * The default whois constructor. Initializes the |
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| 63 | * default port to <code> DEFAULT_PORT </code>. |
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| 64 | ***/ |
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| 65 | public WhoisClient() |
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| 66 | 0 | { |
| 67 | 0 | setDefaultPort(DEFAULT_PORT); |
| 68 | 0 | } |
| 69 | ||
| 70 | /*** |
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| 71 | * Queries the connected whois server for information regarding |
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| 72 | * the given handle. It is up to the programmer to be familiar with the |
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| 73 | * handle syntax of the whois server. You must first connect to a whois |
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| 74 | * server before calling this method, and you should disconnect afterward. |
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| 75 | * <p> |
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| 76 | * @param handle The handle to lookup. |
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| 77 | * @return The result of the whois query. |
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| 78 | * @exception IOException If an I/O error occurs during the operation. |
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| 79 | ***/ |
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| 80 | public String query(String handle) throws IOException |
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| 81 | { |
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| 82 | 0 | return query(false, handle); |
| 83 | } |
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| 84 | ||
| 85 | ||
| 86 | /*** |
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| 87 | * Queries the connected whois server for information regarding |
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| 88 | * the given handle and returns the InputStream of the network connection. |
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| 89 | * It is up to the programmer to be familiar with the handle syntax |
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| 90 | * of the whois server. You must first connect to a finger server before |
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| 91 | * calling this method, and you should disconnect after finishing reading |
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| 92 | * the stream. |
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| 93 | * <p> |
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| 94 | * @param handle The handle to lookup. |
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| 95 | * @return The InputStream of the network connection of the whois query. |
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| 96 | * Can be read to obtain whois results. |
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| 97 | * @exception IOException If an I/O error occurs during the operation. |
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| 98 | ***/ |
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| 99 | public InputStream getInputStream(String handle) throws IOException |
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| 100 | { |
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| 101 | 0 | return getInputStream(false, handle); |
| 102 | } |
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| 103 | ||
| 104 | } |
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| 105 |
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