Embedding Foreign Characters In Your Content-Disposition Filename Header

high-ascii-filename.cfm

<!---
	Query for the files in the directory.
	--
	NOTE: I am doing this so I don't have to embed high-ascii characters
	in the code - I don't think my blog has the proper support for UTF-8
	encoding? Not sure.
--->
<cfset files = directoryList( expandPath( "./" ), false, "name", "Data*" ) />

<!--- Isolate the file with foreign characters. --->
<cfset fileName = files[ 1 ] />
<cfset filePath = expandPath( fileName ) />

<!---
	By default, the filename portion of the Content-Disposition header
	only allows for US-ASCII values. In order to account for foreign /
	exnteded ASCII values, we have to jump through some funky notation.

	In this case, we are attempting to provide fallbacks. The first
	instance of "filename" is for browsers that do not support the RFC
	5987 encoding (they ignore the filename*= after the filename).
	Then, for browsers that DO support the encoding, they will pick
	up the UTF-8 encoding.

	Notice that the UTF-encoded value doesn't need to be quoted since
	the embeded spaces are url-encoded.
--->
<cfheader
	name="content-disposition"
	value="attachment; filename=""#fileName#""; filename*=UTF-8''#urlEncodedFormat( fileName )#"
	/>

<cfcontent
	type="text/plain; charset=utf-8"
	file="#filePath#"
	/>