Here's the 404 redirector code that I developed for a couple of my sites:
<!---
404 Redirector
Query redirects table //for all active values, put in server scope.
//Uses QoQ to get values,
- if value is in the database, do an HTTP 301 (Moved Permanently)
redirect.
- if value is not in the database, do an HTTP 307 (Temporary Redirect)
//- if value is not in the database, insert it
//- if value is in the database but doesn't have a goodurl set,
increment the count
+ Requires datasource "redirects"
--->
<cfscript>
attemptedURL = "http://"; & CGI.server_name & CGI.script_name;
generatedURL = getToken(CGI.query_string, 2, ";");
if (len(trim(generatedURL)) EQ 0) {
generatedURL = attemptedURL;
}
if (findNoCase(":80", generatedurl) NEQ 0) {
generatedurl = replacenocase(generatedurl, ":80", "");
}
</cfscript>
<cfquery name="qryRedirect" datasource="redirects">
SELECT R.goodURL
FROM tblRedirects R
WHERE R.badURL = '#generatedURL#' AND
((R.goodurl IS NOT NULL) OR
(R.goodurl != ''))
</cfquery>
<cfif qryRedirect.recordcount GT 0>
<cfheader name="Location" value="#qryRedirect.goodurl#">
<cfheader statuscode="301" statustext="Moved Permanently">
<cfabort>
<cfelse>
<cfheader name="Location" value="/resources/sitemap.cfm">
<cfheader statuscode="307" statustext="Temporary Redirect">
<cfabort>
</cfif>
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