CFLib.org – Common Function Library Project

urlExists(u)

Last updated January 3, 2006

author

Ben Forta

Version: 1 | Requires: CF6 | Library: NetLib

Description:
Checks to see if a particular URL actually exists.

Return Values:
Returns a boolean.

Example:

<cfset list = "http://www.cflib.org,http://www.dfkdhsfjksdfh.com,http://www.cflib.org/fooman.jsp">
<cfloop index="u" list="#list#">
	<cfoutput>Does #u# exist? #urlExists(u)#<br /></cfoutput>
</cfloop>

Parameters:

Name Description Required
u The URL to check. Yes

Full UDF Source:

<!---
 Checks to see if a particular URL actually exists.
 Gus made some changes to handle a unresolving domain.
 
 @param u 	 The URL to check. (Required)
 @return Returns a boolean. 
 @author Ben Forta (ben@forta.com) 
 @version 1, January 3, 2006 
--->
<cffunction name="urlExists" output="no" returntype="boolean">
	<!--- Accepts a URL --->
	<cfargument name="u" type="string" required="yes">

	<!--- Initialize result --->
	<cfset var result=true>

	<!--- Attempt to retrieve the URL --->
	<cfhttp url="#arguments.u#" resolveurl="no" throwonerror="no" />

	<!--- Check That a Status Code is Returned --->
	<cfif isDefined("cfhttp.responseheader.status_code")>
		<cfif cfhttp.responseheader.status_code EQ "404">
			<!--- If 404, return FALSE --->
			<cfset result=false>
		</cfif>
	<cfelse>
		<!--- No Status Code Returned --->
		<cfset result=false>
	</cfif>
	<cfreturn result>
</cffunction>
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