Class 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;
 }
 
  • Field Details

  • Constructor Details

    • WhoisClient

      public WhoisClient()
      The default whois constructor. Initializes the default port to DEFAULT_PORT.
  • Method Details

    • getInputStream

      public InputStream getInputStream(String handle) throws IOException
      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.
      Parameters:
      handle - The handle to lookup.
      Returns:
      The InputStream of the network connection of the whois query. Can be read to obtain whois results.
      Throws:
      IOException - If an I/O error occurs during the operation.
    • query

      public String query(String handle) throws IOException
      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.
      Parameters:
      handle - The handle to lookup.
      Returns:
      The result of the whois query.
      Throws:
      IOException - If an I/O error occurs during the operation.