(VBScript) Get the Last-Modified Date Before HTTP Download

Demonstrates how to send a HEAD request to get the last-modified date of a file on a web server (without downloading the file).

Chilkat ActiveX Downloads ActiveX for 32-bit and 64-bit Windows

Dim fso, outFile
Set fso = CreateObject("Scripting.FileSystemObject")
'Create a Unicode (utf-16) output text file.
Set outFile = fso.CreateTextFile("output.txt", True, True)

' This example assumes the Chilkat API to have been previously unlocked.
' See Global Unlock Sample for sample code.

' For versions of Chilkat < 10.0.0, use CreateObject("Chilkat_9_5_0.Http")
set http = CreateObject("Chilkat.Http")

' resp is a Chilkat.HttpResponse
Set resp = http.GetHead("https://www.chilkatsoft.com/hamlet.xml")
If (http.LastMethodSuccess = 0) Then
    outFile.WriteLine(http.LastErrorText)
    WScript.Quit
End If

' Examine the response header.
outFile.WriteLine(resp.Header)

' Here is a sample response header:

' 	Content-Length: 279658
' 	Content-Type: text/xml
' 	Last-Modified: Thu, 12 May 2016 15:14:08 GMT
' 	Accept-Ranges: bytes
' 	ETag: "c1cd8bee60acd11:0"
' 	Server: Microsoft-IIS/8.5
' 	X-Powered-By: ASP.NET
' 	X-Powered-By-Plesk: PleskWin
' 	Date: Thu, 25 Jul 2019 16:40:54 GMT

' Get the Last-Modified header.
lastModStr = resp.GetHeaderField("Last-Modified")
' If the header exists...
If (resp.LastMethodSuccess = 1) Then
    ' Parse the RFC822 format date/time string
    ' For versions of Chilkat < 10.0.0, use CreateObject("Chilkat_9_5_0.CkDateTime")
    set ckdt = CreateObject("Chilkat.CkDateTime")
    success = ckdt.SetFromRfc822(lastModStr)

    ' If we want to access individual date/time parts (in the local timezone)
    ' dt is a Chilkat.DtObj
    Set dt = ckdt.GetDtObj(1)
    outFile.WriteLine("day/month/year = " & dt.Day & "/" & dt.Month & "/" & dt.Year)

End If


outFile.Close