added support for automatic whois server detection

network/src/main/java/de/muehlencord/shared/network/whois/Whois.java

@@ -1,5 +1,8 @@
 package de.muehlencord.shared.network.whois;
 
+import java.util.ArrayList;
+import java.util.Iterator;
+import java.util.List;
 import java.util.Locale;
 import org.apache.commons.net.whois.WhoisClient;
 
@@ -9,13 +12,26 @@ import org.apache.commons.net.whois.WhoisClient;
  */
 public class Whois {
 
-    /** logger object */
+    /**
+     * logger object
+     */
     // private static final Logger LOGGER = LogManager.getLogger(Whois.class);
-    /** whoisClient client from commons-net package to execute commands with */
+    /**
+     * whoisClient client from commons-net package to execute commands with
+     */
     WhoisClient whoisClient;
-    /** the complete output */
+    /**
+     * the complete output
+     */
     String whoisString = null;
 
+    private static final List<String> WHOIS_SERVERS;
+
+    static {
+        WHOIS_SERVERS = new ArrayList<>();
+        WHOIS_SERVERS.add("whois.ripe.net");
+    }
+
     /**
      * creates a new instance of the whoisClient client
      */
@@ -24,8 +40,30 @@ public class Whois {
         whoisClient.setDefaultTimeout(60000);
     }
 
+    public WhoisInformation execute(String ip) throws WhoisException {
+
+        Iterator<String> it = WHOIS_SERVERS.iterator();
+        WhoisInformation info = null;
+        while (it.hasNext() && ((info == null) || (info.getNetwork() == null))) {
+            String server = it.next();
+            try {
+                info = execute(server, ip);
+            } catch (WhoisException ex) {
+                info = null;
+            }
+        }
+
+        if (info == null) {
+            throw new WhoisException("Cannot identify network");
+        } else {
+            return info;
+        }
+    }
+
     /**
-     * reads and parses the inforomation for the given ip address from the given whoisserver
+     * reads and parses the inforomation for the given ip address from the given
+     * whoisserver
+     *
      * @param whoIsServer the whoisClient server to use
      * @param ip the ip to query whoisClient data for
      * @return whoisInformation parsed from whoisClient string

network/src/test/java/de/muehlencord/shared/network/whois/WhoisTest.java

@@ -94,7 +94,7 @@ public class WhoisTest extends BaseTest {
     public void testStepWise() throws WhoisException {
         Whois whoIsClient = new Whois();      
         // whoIsClient.execute ("whois.ripe.net", "88.198.181.181");
-        WhoisInformation whoisInformation = whoIsClient.execute ("whois.ripe.net", "212.204.60.1");
+        WhoisInformation whoisInformation = whoIsClient.execute ("212.204.60.1");
         assertTrue ("network", whoisInformation.getNetwork().contains("212.204.60.0/24")); 
         // whoIsClient.execute ("whois.ripe.net", "212.204.60.0");
         // whoIsClient.execute ("whois.ripe.net", "212.0.0.0/8");