CFLib.org – GetHostAddress

GetHostAddress(host)

Last updated November 11, 2002

author

Version: 1 | Requires: ColdFusion 5 | Library: NetLib

Rated 1 time(s). Average Rating: 5.0

Description:
Reverse 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:

Name	Description	Required
host	The host name to lookup.	Yes

Full UDF Source:

	
	<cfscript>
/**
 * Performs a reverse DNS lookup.
 * 
 * @param host      The host name to lookup. (Required)
 * @return Returns an IP address. 
 * @author Ben Forta (ben@forta.com) 
 * @version 1, November 11, 2002 
 */
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();
}
</cfscript>