how to prevent cached response from MSXML2.XMLHTTP, vbscript - vbscript

Question

I'm writing a wscript with vbscript in Windows 7.
The script needs to grab a file from an open ftp server, so I must use MSXML2.XMLHTTP object
The file I am grabbing is being cached in a sub folder of
C:\Users\user\AppData\Local\Microsoft\Windows\Temporary Internet Files\Content.IE5
The file that is cached has no "expires" value, and trying to set a value using setRequestHeader method doesn't seem to have any effect.
I will self-answer this in case anyone else needs this solution

Answer 1

this code snippet shows how to delete the cached files from the folder used by MSXML2.XMLHTTP, using the concept of the downloaded files will have the extension ".csv"
<job>
<script language="vbscript">
' use XMLHTTP to grab content from a URL
CMEURL = "ftp://ftp.cmegroup.com/pub/settle/nymex_future.csv"
' the downloaded files are being stored in a subfolder of this folder
filedownloadcachelocation = "C:\Users\user\AppData\Local\Microsoft\Windows\Temporary Internet Files\Content.IE5"
' delete the file before requesting a download
Dim fso
Set fso = CreateObject("Scripting.FileSystemObject")
Dim fileresults
Dim Directory
Set Directory = fso.GetFolder(filedownloadcachelocation)
Dim subfolders
Set subfolders = Directory.SubFolders
For Each Folder In subfolders
For Each FileName In Folder.Files
' only react if filename extension is csv
If InStr(FileName , ".csv") Then
fileresults = fileresults & FileName.Path & vbLf
' delete the file
If fso.FileExists(FileName.Path) Then
'WScript.Echo "deleting file " & FileName.Path
fso.DeleteFile FileName.Path
End If
End If ' csv ext
Next ' each file in folder
Next ' each folder in Content.IE5
WScript.Echo "files found that were deleted = " & VbLf & fileresults
' now continue with downloading the file using XMLHTTP