gistfile1.cfm

<!---
Does a URL exist? Checks that host exists and for
404 status code.
http://www.forta.com/blog/index.cfm?mode=day&day=2&month=1&year=2006
--->
<cffunction name="urlExists" output="no" returntype="boolean">
    <!--- Accepts a URL --->
	<cfargument name="u" type="string" required="yes">
	
	<!--- Attempt to retrieve the URL --->
	<cftry>
		<cfhttp method="head" url="#ARGUMENTS.u#" resolveurl="no" throwonerror="no" timeout="2" />
		<cfreturn not ( NOT IsDefined("cfhttp.responseheader.status_code") OR cfhttp.responseheader.status_code EQ "404" ) >
		<cfcatch type="any">
			<cfreturn false /><!--- failed to test file location --->
		</cfcatch>
	</cftry>
</cffunction>

<cfset checkMe = IIF( urlExists( loremUrl ), DE( valA ), DE( valB ) ) />