In this tutorial, we will show you how to use Java library – “Apache Commons Net” to get WHOIS data of a domain.
1. Simple Java Whois Example
For domain registered under internic.net, you can get the whois data directly.
WhoisTest.java
package com.mkyong.whois.bo;
import java.io.IOException;
import java.net.SocketException;
import org.apache.commons.net.whois.WhoisClient;
public class WhoisTest {
public static void main(String[] args) {
WhoisTest obj = new WhoisTest();
System.out.println(obj.getWhois("mkyong.com"));
System.out.println("Done");
}
public String getWhois(String domainName) {
StringBuilder result = new StringBuilder("");
WhoisClient whois = new WhoisClient();
try {
//default is internic.net
whois.connect(WhoisClient.DEFAULT_HOST);
String whoisData1 = whois.query("=" + domainName);
result.append(whoisData1);
whois.disconnect();
} catch (SocketException e) {
e.printStackTrace();
} catch (IOException e) {
e.printStackTrace();
}
return result.toString();
}
}
2. Complex Java Whois Example
For domain registered under other registrars (not internic.net), you need some extra steps to get the whois data.
Review the whois command in *nix and mac.
$ whois google.com
### It will returns many non related subdomain.google.com data
$ whois =google.com
### Add '=' sign to get the exact result.
### refer to the "Whois server" URL
### Sample data
### Domain Name: GOOGLE.COM
### Registrar: MARKMONITOR INC.
### Whois Server: whois.markmonitor.com
### Referral URL: http://www.markmonitor.com
### The google.com whois is available under whois.markmonitor.com
$ whois -h whois.markmonitor.com google.com
### done, finally, get the whois data of google.com
Let implement above steps in Java, see comments for self-explanatory.
WhoisTest.java
package com.mkyong.whois.bo;
import java.io.IOException;
import java.net.SocketException;
import java.util.regex.Matcher;
import java.util.regex.Pattern;
import org.apache.commons.net.whois.WhoisClient;
public class WhoisTest {
private static Pattern pattern;
private Matcher matcher;
// regex whois parser
private static final String WHOIS_SERVER_PATTERN = "Whois Server:\\s(.*)";
static {
pattern = Pattern.compile(WHOIS_SERVER_PATTERN);
}
public static void main(String[] args) {
WhoisTest obj = new WhoisTest();
System.out.println(obj.getWhois("google.com"));
System.out.println("Done");
}
// example google.com
public String getWhois(String domainName) {
StringBuilder result = new StringBuilder("");
WhoisClient whois = new WhoisClient();
try {
whois.connect(WhoisClient.DEFAULT_HOST);
// whois =google.com
String whoisData1 = whois.query("=" + domainName);
// append first result
result.append(whoisData1);
whois.disconnect();
// get the google.com whois server - whois.markmonitor.com
String whoisServerUrl = getWhoisServer(whoisData1);
if (!whoisServerUrl.equals("")) {
// whois -h whois.markmonitor.com google.com
String whoisData2 =
queryWithWhoisServer(domainName, whoisServerUrl);
// append 2nd result
result.append(whoisData2);
}
} catch (SocketException e) {
e.printStackTrace();
} catch (IOException e) {
e.printStackTrace();
}
return result.toString();
}
private String queryWithWhoisServer(String domainName, String whoisServer) {
String result = "";
WhoisClient whois = new WhoisClient();
try {
whois.connect(whoisServer);
result = whois.query(domainName);
whois.disconnect();
} catch (SocketException e) {
e.printStackTrace();
} catch (IOException e) {
e.printStackTrace();
}
return result;
}
private String getWhoisServer(String whois) {
String result = "";
matcher = pattern.matcher(whois);
// get last whois server
while (matcher.find()) {
result = matcher.group(1);
}
return result;
}
}
Output
Whois Server Version 2.0
Domain names in the .com and .net domains can now be registered
with many different competing registrars. Go to http://www.internic.net
for detailed information.
//......
Registrant:
Dns Admin
Google Inc.
Please contact [email protected] 1600 Amphitheatre Parkway
Mountain View CA 94043
US
[email protected] +1.6502530000 Fax: +1.6506188571
Domain Name: google.com
Registrar Name: Markmonitor.com
Registrar Whois: whois.markmonitor.com
Registrar Homepage: http://www.markmonitor.com
//......
Created on..............: 1997-09-15.
Expires on..............: 2020-09-13.
Record last updated on..: 2013-02-28.
//......
Whois parser
Above is using a regex to grab the whois server url. If you know any Java whois parser, do comment below , thanks.
Above is using a regex to grab the whois server url. If you know any Java whois parser, do comment below , thanks.
Will this work with Whoxy API – https://www.whoxy.com
how to take limited content from whois server
error code!if the domain names is to long,does it work?
Could you provide the way to process when behind a proxy? Great snippet though!
Good work!
nice yong…
Wow! Looking for something like this for some time. Thanks Man. You rock!