このチュートリアルでは、ドメインのWHOISデータを取得するためのJavaライブラリ「Apache Commons Net」の使用方法を説明します。
1.単純なJavaのWhoisの例
internic.netに登録されているドメインの場合は、whoisデータを直接取得できます。
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.複雑なJava Whoisの例
他のレジストラ（internic.netではなく）に登録されているドメインの場合は、whoisデータを取得するためにいくつかの追加手順が必要です。
$ 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
上記の手順をJavaで実装してみましょう。コメントは自明です。
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;
}
}
出力
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 contact-admin@google.com 1600 Amphitheatre Parkway
Mountain View CA 94043
US
dns-admin@google.com +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 ** 上では正規表現を使ってwhoisサーバのURLを取得しています。もしあなたがJavaのwhoisパーサを知っているなら、下記にコメントしてください。ありがとう。
