CFLib.org – Common Function Library Project

Description:
Performs a DNS lookup. Provide a host name, it'll return an IP address. If the host name is invalid an exception will be throw, so <CFTRY>/<CFCATCH> should be used.

Return Values:
Returns an IP address.

Example:

<cfset url1 = "macromedia.com">
<cfset url2 = "microsoft.com">
<cfoutput>
Host address for #url1# is #GetHostAddress(url1)#<br>
Host address for #url2# is #GetHostAddress(url2)#<br>
</cfoutput>

Parameters:

Full UDF Source:

/**
 * Performs a DNS lookup.
 * 
 * @param host      The host name to lookup. (Required)
 * @return Returns an IP address. 
 * @author Ben Forta (ben@forta.com) 
 * @version 1, January 12, 2012 
 */
function GetHostAddress(host) {
   // Variables
   var iaclass="";
   var addr="";
   
   // Init class
   iaclass=CreateObject("java", "java.net.InetAddress");

   // Get address
   addr=iaclass.getByName(host);

   // Return the address    
   return addr.getHostAddress();
}