(VBScript) Bunny Sign URL and then Download using Signed URL

See more Bunny CDN Examples

Shows how to sign a URL for BunnyCDN Token Authentication and then use it to download.

For more information, see https://support.bunny.net/hc/en-us/articles/360016055099-How-to-sign-URLs-for-BunnyCDN-Token-Authentication

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.

mySecurityKey = "e7ea8d73-8fa0-44ef-a2cc-91526f7df5ed"

url = "https://test.b-cdn.net/sample-pdf-with-images.pdf"

' Extract the URL components.
' For versions of Chilkat < 10.0.0, use CreateObject("Chilkat_9_5_0.Url")
set urlObj = CreateObject("Chilkat.Url")
success = urlObj.ParseUrl(url)

url_scheme = "https"
If (urlObj.Ssl = 0) Then
    url_scheme = "http"
End If

url_host = urlObj.Host
url_path = urlObj.Path

' Calculate an expiration time 1 hour from the current date/time.
' For versions of Chilkat < 10.0.0, use CreateObject("Chilkat_9_5_0.CkDateTime")
set expTime = CreateObject("Chilkat.CkDateTime")
success = expTime.SetFromCurrentSystemTime()
success = expTime.AddSeconds(3600)
expires = expTime.GetAsUnixTimeStr(0)

outFile.WriteLine("Expires = " & expires)

' Create the string to hash
' For versions of Chilkat < 10.0.0, use CreateObject("Chilkat_9_5_0.StringBuilder")
set sbToHash = CreateObject("Chilkat.StringBuilder")
success = sbToHash.Append(mySecurityKey)
success = sbToHash.Append(url_path)
success = sbToHash.Append(expires)

' Base64Url encoding is the same as base64, except "-" is used instead of "+",
' "_" is used instead of "/", and no "=" padding is added.
token = sbToHash.GetHash("sha256","base64Url","utf-8")

' For versions of Chilkat < 10.0.0, use CreateObject("Chilkat_9_5_0.StringBuilder")
set sbSignedUrl = CreateObject("Chilkat.StringBuilder")
success = sbSignedUrl.Append(url_scheme)
success = sbSignedUrl.Append("://")
success = sbSignedUrl.Append(url_host)
success = sbSignedUrl.Append(url_path)
success = sbSignedUrl.Append("?token=")
success = sbSignedUrl.Append(token)
success = sbSignedUrl.Append("&expires=")
success = sbSignedUrl.Append(expires)

signedUrl = sbSignedUrl.GetAsString()
outFile.WriteLine("Signed URL: " & signedUrl)

' Use the signed URL to download the file.
' For versions of Chilkat < 10.0.0, use CreateObject("Chilkat_9_5_0.Http")
set http = CreateObject("Chilkat.Http")
success = http.Download(signedUrl,"c:/aaworkarea/sample.pdf")
If (success = 0) Then
    outFile.WriteLine(http.LastErrorText)
Else
    outFile.WriteLine("Success.")
End If


outFile.Close