cfspreadsheet save as .csv, Excel says "The file format and extension of FILE.csv don't match." - coldfusion

Question

I've created a cold fusion page to output a client list from MYSQL into a CSV file for easy uploading to SalesForce.com
I can generate the file with all the correct information. However, when I try to open it with excel I get the error:
"The file format and extension of 'SalesForceDailyLeads-20160613125138.csv' don't match. The file could be corrupted or unsafe. Unless you trust its source, don't open it. Do you want to open it anyway?" I can open it(excel for MAC), but it appears to me that CFSpreadsheet is not creating a legit .csv file and is instead making a xlsx.
<cfset FileCSV = "SalesForceDailyLeads-#dateformat(getBatch.BATCH,"yyyymmdd")##timeformat(getBatch.BATCH,"HHmmss")#.csv" >
<cfset filename = "/SF/#fileCSV#">
<cfset s = spreadsheetNew() >
<cfset spreadsheetAddRow(s, "FIRST, LAST, MIDDLE, STREET, CITY, ZIP, STATE")>
<cfinclude template="SFgetList.cfm">
<cfset spreadsheetAddRows(s, getList)>
<cfspreadsheet
action="write"
overwrite = "true"
format ="csv"
name ="s"
filename ="#filename#"
>
If I make an XLS file I have no issues like I do with CSVs. Is this a problem with the code, CFSpreadsheet, or excel(for mac)? Can I fix it?

Answer 1

Use cffile, not cfspreadsheet to create the files. Per the documentation:
The cfspreadsheet tag writes only XLS[X] format files. To write a CSV
file, put your data in a CSV formatted string variable and use the
cffile tag to write the variable contents in a file.

Answer 2

Thanks! Of course, right after I posted this I found the docs and saw that I was using it incorrectly and I used CFFILE instead. I used a script/function I found to do this. It took a little work however, to convert the query into CSV- luckily someone else already did it. In case anyone care to see it:
I got the querytoCSV script here:
https://gist.github.com/CreativeNotice/2775372
<cfscript>
/**
* queryToCsv
* Allows us to pass in a query object and returns that data as a CSV.
* This is a refactor of Ben Nadel's method, http://www.bennadel.com/blog/1239-Updated-Converting-A-ColdFusion-Query-To-CSV-Using-QueryToCSV-.htm
* #param {Query} q {required} The cf query object to convert. E.g. pass in: qry.execute().getResult();
* #param {Boolean} hr {required} True if we should include a header row in our CSV, defaults to TRUE
* #param {String} d {required} Delimiter to use in CSV, defaults to a comma (,)
* #return {String} CSV content
*/
public string function queryToCsv(required query q, required boolean hr = true, required string d = ","){
var colNames = listToArray( lCase(arguments.q.columnlist) );
var newLine = (chr(13) & chr(10));
var buffer = CreateObject('java','java.lang.StringBuffer').Init();
// Check if we should include a header row
if(arguments.hr){
// append our header row
buffer.append(
ArrayToList(colNames,arguments.d) & newLine
);
}
// Loop over query and build csv rows
for(var i=1; i <= arguments.q.recordcount; i=i+1){
// this individual row
var thisRow = [];
// loop over column list
for(var j=1; j <= arrayLen(colNames); j=j+1){
// create our row
thisRow[j] = replace( replace( arguments.q[colNames[j]][i],',','','all'),'""','""""','all' );
}
// Append new row to csv output
buffer.append(
JavaCast( 'string', ( ArrayToList( thisRow, arguments.d ) & iif(i < arguments.q.recordcount, "newLine","") ) )
);
}
return buffer.toString();
};
</cfscript>
<cfinclude template="getDups.cfm">
<cfinclude template="SFgetList.cfm">
<cfset FileCSV = "SalesForceDailyLeads-#dateformat(getBatch.BATCH,"yyyymmdd")##timeformat(getBatch.BATCH,"HHmmss")#.CSV" >
<cfset filename = "/mnt/nas-share/data/feed/SF/#fileCSV#">
<cfset qc = #queryToCsv(getList, false, ",")# >
<cfoutput>#qc#</cfoutput>
<cfset heads= "FIRST, LAST, MIDDLE, STREET, CITY, ZIP, STATE">
>
<cffile
action = "write"
file = #filename#
output = #heads#
addNewLine = "yes"
fixnewline = "no">
<cffile
action = "append"
file = #filename#
output = #qc#
addNewLine = "yes"
fixnewline = "no">