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import java.io.*;
import java.net.*;
/**
* @author Neeraj Vora
*
* WHOIS gets domain and server information.
* Talks to Internic sever to get domain registration information.
* Talks to server to get daytime and finger-query information.
*/
public class WHOIS
{
/**
* Private method to talk to a specific host-port combination.<br>
* Uses lineSepartor to delimit the response lines in the return
* string.
*/
private String talkToHostSocket (String hostName, int portNumber,
String sendString, String lineSeparater,
String exceptionMessagePrefix)
{
StringBuffer returnStringBuffer = new StringBuffer();
String line;
try
{
Socket s = new Socket (hostName, portNumber);
PrintWriter pw = new PrintWriter (s.getOutputStream(), true);
pw.println (sendString);
BufferedReader br = new BufferedReader
(new InputStreamReader(s.getInputStream()));
while ((line=br.readLine())!=null)
{
returnStringBuffer.append (line);
returnStringBuffer.append (lineSeparater);
}
}
catch (Exception e)
{
returnStringBuffer.append (exceptionMessagePrefix);
returnStringBuffer.append (e.toString());
}
return returnStringBuffer.toString();
} // end talkToHostSocket
/**
* Talks to Internic server at port 43 to inquire about domain
* registration.
*/
public String getDomainInfo (String domainName)
{
return talkToHostSocket ("whois.internic.net", 43, domainName, "\n",
"Error Getting Domain Information:");
} // end getDomainInfo
/**
* Talks to Internic server at port 43 to inquire about domain
* registration.<br>
* Uses lineSepartor to delimit the response lines in the return
* string.<br>
* Towards the end of 1999, the Internic server only points to one
* of the several possible competing registrars, and the WHOIS server
* of the registrar actually provides the registration information.
* <br>
* The method now automatically goes to the appropriate registrar.
* It also looks up the first record in case of multi-record result.
*/
public String getDomainInfo (String domainName, String lineSeparater)
{
String str = talkToHostSocket ("whois.internic.net", 43, domainName, lineSeparater,
"Error Getting Domain Information:");
int i = str.indexOf ("Whois Server:");
if (i<0)
return str;
i = str.indexOf (":",i);
if (i<0)
return str;
int j = str.indexOf (lineSeparater, i);
if (j<=i)
return str;
String str2 = str.substring(i+1,j).trim();
StringBuffer sb = new StringBuffer(str);
sb.append (lineSeparater);
sb.append (lineSeparater);
sb.append (lineSeparater);
String str3 = talkToHostSocket (str2, 43, domainName, lineSeparater,
"Error Getting Domain Information:");
sb.append (str3);
i = str3.indexOf ("!xxx");
if (i<0)
return sb.toString();
sb.append (lineSeparater);
sb.append (lineSeparater);
sb.append (lineSeparater);
i = str3.indexOf ("-DOM");
if (i<0)
return sb.toString();
String str4 = str3.substring (0, i);
i = str4.lastIndexOf ("(");
if (i<0)
return sb.toString();
str4 = "!" + str4.substring (i+1) + "-DOM";
sb.append (talkToHostSocket (str2, 43, str4, lineSeparater,
"Error Getting Domain Information:"));
return sb.toString();
} // end getDomainInfo
/**
* Talks to the server at port 13 to get the daytime information.
*/
public String getDaytimeInfo (String hostName)
{
return talkToHostSocket (hostName, 13, "daytime", "",
"Error Getting Server Time:");
} // end getDaytimeInfo
/**
* Talks to the server at port 79 to get the finger query
* information.
*/
public String getFingerQueryInfo (String hostName, String userName)
{
return talkToHostSocket (hostName, 79, userName, "\n",
"Error Getting User Information:");
} // end getFingerQueryInfo
/**
* Talks to the server at port 79 to get the finger query
* information.<br>
* Uses lineSepartor to delimit the response lines in the return
* string.
*/
public String getFingerQueryInfo (String hostName, String userName, String lineSeparater)
{
return talkToHostSocket (hostName, 79, userName, lineSeparater,
"Error Getting User Information:");
} // end getFingerQueryInfo
} // end class WHOIS
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