(Visual FoxPro) 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

LOCAL lnSuccess
LOCAL lcMySecurityKey
LOCAL lcUrl
LOCAL loUrlObj
LOCAL lcUrl_scheme
LOCAL lcUrl_host
LOCAL lcUrl_path
LOCAL loExpTime
LOCAL lcExpires
LOCAL loSbToHash
LOCAL lcToken
LOCAL loSbSignedUrl
LOCAL lcSignedUrl
LOCAL loHttp

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

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

lcUrl = "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')
loUrlObj = CreateObject('Chilkat.Url')
loUrlObj.ParseUrl(lcUrl)

lcUrl_scheme = "https"
IF (loUrlObj.Ssl = 0) THEN
    lcUrl_scheme = "http"
ENDIF

lcUrl_host = loUrlObj.Host
lcUrl_path = loUrlObj.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')
loExpTime = CreateObject('Chilkat.CkDateTime')
loExpTime.SetFromCurrentSystemTime()
loExpTime.AddSeconds(3600)
lcExpires = loExpTime.GetAsUnixTimeStr(0)

? "Expires = " + lcExpires

* Create the string to hash
* For versions of Chilkat < 10.0.0, use CreateObject('Chilkat_9_5_0.StringBuilder')
loSbToHash = CreateObject('Chilkat.StringBuilder')
loSbToHash.Append(lcMySecurityKey)
loSbToHash.Append(lcUrl_path)
loSbToHash.Append(lcExpires)

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

* For versions of Chilkat < 10.0.0, use CreateObject('Chilkat_9_5_0.StringBuilder')
loSbSignedUrl = CreateObject('Chilkat.StringBuilder')
loSbSignedUrl.Append(lcUrl_scheme)
loSbSignedUrl.Append("://")
loSbSignedUrl.Append(lcUrl_host)
loSbSignedUrl.Append(lcUrl_path)
loSbSignedUrl.Append("?token=")
loSbSignedUrl.Append(lcToken)
loSbSignedUrl.Append("&expires=")
loSbSignedUrl.Append(lcExpires)

lcSignedUrl = loSbSignedUrl.GetAsString()
? "Signed URL: " + lcSignedUrl

* Use the signed URL to download the file.
* For versions of Chilkat < 10.0.0, use CreateObject('Chilkat_9_5_0.Http')
loHttp = CreateObject('Chilkat.Http')
lnSuccess = loHttp.Download(lcSignedUrl,"c:/aaworkarea/sample.pdf")
IF (lnSuccess = 0) THEN
    ? loHttp.LastErrorText
ELSE
    ? "Success."
ENDIF

RELEASE loUrlObj
RELEASE loExpTime
RELEASE loSbToHash
RELEASE loSbSignedUrl
RELEASE loHttp