org.apache.commons.net

Class WhoisClient

java.lang.Object
|
+--org.apache.commons.net.SocketClient
   |
   +--org.apache.commons.net.FingerClient
      |
      +--org.apache.commons.net.WhoisClient

public final class WhoisClient
extends 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

Field Summary

static String

The default whois host to query.

static int

The default whois port.

Constructor Summary

The default whois constructor.

Method Summary

InputStream

getInputStream(String handle)

Queries the connected whois server for information regarding the given handle and returns the InputStream of the network connection.

String

query(String handle)

Queries the connected whois server for information regarding the given handle.

Field Details

DEFAULT_HOST

public static final String DEFAULT_HOST

The default whois host to query. It is set to whois.internic.net.

DEFAULT_PORT

public static final int DEFAULT_PORT

The default whois port. It is set to 43 according to RFC 954.

Constructor Details

WhoisClient

public WhoisClient()

The default whois constructor. Initializes the default port to DEFAULT_PORT .

Method Details

getInputStream

public InputStream getInputStream(String 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.

handle - The handle to lookup.

The InputStream of the network connection of the whois query. Can be read to obtain whois results.

- If an I/O error occurs during the operation.

query

public String query(String handle)

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.

handle - The handle to lookup.

The result of the whois query.

- If an I/O error occurs during the operation.