AutoIt

REST Stream Response to File (Streaming Download) (Amazon S3)

See more Amazon S3 (new) Examples

Demonstrates how to stream the response body directly to a file. (The example shows how to stream a JPG from the Amazon S3 service.) AutoIt

Local $bSuccess = False

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

$oRest = ObjCreate("Chilkat.Rest")

; Connect to the Amazon AWS REST server.
Local $bTls = True
Local $iPort = 443
Local $bAutoReconnect = True
$bSuccess = $oRest.Connect("s3.amazonaws.com",$iPort,$bTls,$bAutoReconnect)

; ----------------------------------------------------------------------------
; Important: For buckets created in regions outside us-east-1,
; there are three important changes that need to be made.
; See Working with S3 Buckets in Non-us-east-1 Regions for the details.
; ----------------------------------------------------------------------------

; Provide AWS credentials for the REST call.
$oAuthAws = ObjCreate("Chilkat.AuthAws")
$oAuthAws.AccessKey = "AWS_ACCESS_KEY"
$oAuthAws.SecretKey = "AWS_SECRET_KEY"
$oAuthAws.ServiceName = "s3"
$bSuccess = $oRest.SetAuthAws($oAuthAws)

; Set the bucket name via the HOST header.
; In this case, the bucket name is "chilkat100".
$oRest.Host = "chilkat100.s3.amazonaws.com"

; Send the request to download the JPG.
$bSuccess = $oRest.SendReqNoBody("GET","/starfish.jpg")
If ($bSuccess <> True) Then
    ConsoleWrite($oRest.LastErrorText & @CRLF)
    Exit
EndIf

; Read the response header.
Local $iResponseStatusCode = $oRest.ReadResponseHeader()
If ($iResponseStatusCode < 0) Then
    ConsoleWrite($oRest.LastErrorText & @CRLF)
    Exit
EndIf

ConsoleWrite("Response status code = " & $iResponseStatusCode & @CRLF)

; We expect a 200 response status if the JPG data is coming.
; Otherwise, we'll get a string response body with an error message(or no response body).
If ($iResponseStatusCode = 200) Then

    $oBodyStream = ObjCreate("Chilkat.Stream")

    ; The stream's sink will be a file.
    $oBodyStream.SinkFile = "qa_output/starfish.jpg"

    ; Read the response body to the stream.  Given that we've
    ; set the stream's sink to a file, it will stream directly
    ; to the file.
    $bSuccess = $oRest.ReadRespBodyStream($oBodyStream,True)
    If ($bSuccess <> True) Then
        ConsoleWrite($oRest.LastErrorText & @CRLF)
        Exit
    EndIf

    ConsoleWrite("Successfully received the JPG file." & @CRLF)

Else
Local $sErrResponse = $oRest.ReadRespBodyString()
    If ($oRest.LastMethodSuccess <> True) Then
        ConsoleWrite($oRest.LastErrorText & @CRLF)
    Else
        ConsoleWrite($sErrResponse & @CRLF)
    EndIf

EndIf