Url regex

To start with, I am assuming there's been a typo, and you mean http. Then you can solve the problem the old-fashioned way.

Treat the URL as a string of the form:

http://xxx?yyy

where xxx is the part you want. You can consider the symbol ? as a delimiter of a list that consists of the 2 elements, http://xxx and yyy. All that is left is for you to strip off http://

<cfset urlString="http://www.amazon.com?type=books&sessionid=1234">
<cfset domain = listGetAt(urlString,1,"?")>
<cfset www = replaceNoCase(domain, "http://", "")>
<cfoutput>#www#</cfoutput>

Yep.

Have a look at rereplace():

http://livedocs.adobe.com/coldfusion/8/htmldocs/functions_m-r_35.html#135742

And how regular expressions work:

http://livedocs.adobe.com/coldfusion/8/htmldocs/regexp_01.html#1100400

Or a slightly obtuse way would be to treat the URL like a slash-delimited list, and the domain name would be the second element.

--

Adam