(CkPython) 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 Python Downloads install with pip pip3 install chilkat or download... Python Module for Windows, MacOS, Linux, Alpine Linux, Solaris

import chilkat

# 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.
urlObj = chilkat.CkUrl()
urlObj.ParseUrl(url)

url_scheme = "https"
if (urlObj.get_Ssl() == False):
    url_scheme = "http"

url_host = urlObj.host()
url_path = urlObj.path()

# Calculate an expiration time 1 hour from the current date/time.
expTime = chilkat.CkDateTime()
expTime.SetFromCurrentSystemTime()
expTime.AddSeconds(3600)
expires = expTime.getAsUnixTimeStr(False)

print("Expires = " + expires)

# Create the string to hash
sbToHash = chilkat.CkStringBuilder()
sbToHash.Append(mySecurityKey)
sbToHash.Append(url_path)
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")

sbSignedUrl = chilkat.CkStringBuilder()
sbSignedUrl.Append(url_scheme)
sbSignedUrl.Append("://")
sbSignedUrl.Append(url_host)
sbSignedUrl.Append(url_path)
sbSignedUrl.Append("?token=")
sbSignedUrl.Append(token)
sbSignedUrl.Append("&expires=")
sbSignedUrl.Append(expires)

signedUrl = sbSignedUrl.getAsString()
print("Signed URL: " + signedUrl)

# Use the signed URL to download the file.
http = chilkat.CkHttp()
success = http.Download(signedUrl,"c:/aaworkarea/sample.pdf")
if (success == False):
    print(http.lastErrorText())
else:
    print("Success.")