AutoIt

Generate an AWS (S3) Pre-Signed URL to Download File

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Demonstrates how to generate a pre-signed URL to download a file from the Amazon S3 service. AutoIt

Local $bSuccess = False

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

$oHttp = ObjCreate("Chilkat.Http")

$oHttp.AwsAccessKey = "AWS_ACCESS_KEY"
$oHttp.AwsSecretKey = "AWS_SECRET_KEY"

; Make sure to set your AWS region correctly
$oHttp.AwsRegion = "us-east-1"

Local $sBucketName = "chilkat100"
Local $sObjectName = "starfish/starfish.jpg"
Local $sLocalFilePath = "qa_output/starfish.jpg"
Local $sAwsService = "s3"

; The signed URL will be valid for this number of seconds:
Local $iNumSecondsValid = 86400

; Choose between a URL beginning with "http://" or "https://"...
Local $bUseHttps = False

; Generate the pre-signed URL
Local $sPreSignedUrl = $oHttp.S3_GenPresignedUrl("GET",$bUseHttps,$sBucketName,$sObjectName,$iNumSecondsValid,$sAwsService)
If ($oHttp.LastMethodSuccess = False) Then
    ConsoleWrite($oHttp.LastErrorText & @CRLF)
    Exit
EndIf

; The following URL can be copy-and-pasted into a browser..
ConsoleWrite("Pre-Signed AWS S3 URL: " & $sPreSignedUrl & @CRLF)

; Here's an example of a pre-signed URL. 
; This URL will only work within 1 day (86400 seconds) after the time this example was published.
; 
;     http://chilkat100.s3.amazonaws.com/starfish/starfish.jpg?X-Amz-Algorithm=AWS4-HMAC-SHA256&X-Amz-Credential=16QXXDGY83AJJR6RVQ02%2F20170111%2Fus-west-2%2Fs3%2Faws4_request&X-Amz-Date=20170111T161959Z&X-Amz-Expires=86400&X-Amz-SignedHeaders=host&X-Amz-Signature=72bf4fd9a15d7bbcdd313a3318d937a778905f62a3fbff9b789d8dc28acd9232

; Now try to do an HTTP Download using the signed URL.
$bSuccess = $oHttp.Download($sPreSignedUrl,"c:/temp/qa_output/starfish.jpg")
If ($bSuccess = False) Then
    ConsoleWrite($oHttp.LastErrorText & @CRLF)
    Exit
EndIf

ConsoleWrite("Success." & @CRLF)