(PowerBuilder) 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

integer li_rc
integer li_Success
string ls_MySecurityKey
string ls_Url
oleobject loo_UrlObj
string ls_Url_scheme
string ls_Url_host
string ls_Url_path
oleobject loo_ExpTime
string ls_Expires
oleobject loo_SbToHash
string ls_Token
oleobject loo_SbSignedUrl
string ls_SignedUrl
oleobject loo_Http

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

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

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

// Extract the URL components.
loo_UrlObj = create oleobject
// Use "Chilkat_9_5_0.Url" for versions of Chilkat < 10.0.0
li_rc = loo_UrlObj.ConnectToNewObject("Chilkat.Url")
if li_rc < 0 then
    destroy loo_UrlObj
    MessageBox("Error","Connecting to COM object failed")
    return
end if
loo_UrlObj.ParseUrl(ls_Url)

ls_Url_scheme = "https"
if loo_UrlObj.Ssl = 0 then
    ls_Url_scheme = "http"
end if

ls_Url_host = loo_UrlObj.Host
ls_Url_path = loo_UrlObj.Path

// Calculate an expiration time 1 hour from the current date/time.
loo_ExpTime = create oleobject
// Use "Chilkat_9_5_0.CkDateTime" for versions of Chilkat < 10.0.0
li_rc = loo_ExpTime.ConnectToNewObject("Chilkat.CkDateTime")

loo_ExpTime.SetFromCurrentSystemTime()
loo_ExpTime.AddSeconds(3600)
ls_Expires = loo_ExpTime.GetAsUnixTimeStr(0)

Write-Debug "Expires = " + ls_Expires

// Create the string to hash
loo_SbToHash = create oleobject
// Use "Chilkat_9_5_0.StringBuilder" for versions of Chilkat < 10.0.0
li_rc = loo_SbToHash.ConnectToNewObject("Chilkat.StringBuilder")

loo_SbToHash.Append(ls_MySecurityKey)
loo_SbToHash.Append(ls_Url_path)
loo_SbToHash.Append(ls_Expires)

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

loo_SbSignedUrl = create oleobject
// Use "Chilkat_9_5_0.StringBuilder" for versions of Chilkat < 10.0.0
li_rc = loo_SbSignedUrl.ConnectToNewObject("Chilkat.StringBuilder")

loo_SbSignedUrl.Append(ls_Url_scheme)
loo_SbSignedUrl.Append("://")
loo_SbSignedUrl.Append(ls_Url_host)
loo_SbSignedUrl.Append(ls_Url_path)
loo_SbSignedUrl.Append("?token=")
loo_SbSignedUrl.Append(ls_Token)
loo_SbSignedUrl.Append("&expires=")
loo_SbSignedUrl.Append(ls_Expires)

ls_SignedUrl = loo_SbSignedUrl.GetAsString()
Write-Debug "Signed URL: " + ls_SignedUrl

// Use the signed URL to download the file.
loo_Http = create oleobject
// Use "Chilkat_9_5_0.Http" for versions of Chilkat < 10.0.0
li_rc = loo_Http.ConnectToNewObject("Chilkat.Http")

li_Success = loo_Http.Download(ls_SignedUrl,"c:/aaworkarea/sample.pdf")
if li_Success = 0 then
    Write-Debug loo_Http.LastErrorText
else
    Write-Debug "Success."
end if



destroy loo_UrlObj
destroy loo_ExpTime
destroy loo_SbToHash
destroy loo_SbSignedUrl
destroy loo_Http