(AutoIt) Download GMail Message Attachment by ID

Demonstrates how to download a GMail email attachment by the attachment ID.

For more information, see https://developers.google.com/gmail/api/v1/reference/users/messages/attachments/get

Chilkat ActiveX Downloads ActiveX for 32-bit and 64-bit Windows

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

$oHttp = ObjCreate("Chilkat.Http")
Local $bSuccess

$oHttp.AuthToken = "ACCESS_TOKEN"
$oHttp.Accept = "application/json"

; See the following example:  Get GMail Message (format=full)
; It shows how to download an email by message ID, and it shows how to parse the JSON
; response which includes attachment names, ids, and other information.

; This example will assume we already have the attachment id and filename.

; This is the attachment ID for a file named "helloWorld.pdf".
Local $sAttachmentId = "ANGjdJ-oy3aCuZISJKLAhUdaEksCEklbAPyMaWzFgqOMGbPCRkgwgeu_Kttd99C17OBTHROkDZGekibTKWXGfscB5ww7fw4E65_V1dQ-jHhb2TD1Cdm58-BbNw2iDxzptco8iILPiSnLLfFn5Ps7nsRcxHaGTt3r0yqFKCuIYNnPK1vM04BXI_cfzo-HnI4I3tD6oHNHOGVQrL01MdShFQjPELPUjXM8z1qs7Kom-QyvV1iOldUN-66UuhynsmDX-CMM5TIdB-8KD_lmdhf-0DqG8JnCA20XpXyfqwS8XFkPA-t-QSjb7SdkHQFtQ4lz2PcBREFzZ2eI5j0l0Y_dQHRPYTeMwkVl1yl4MfFT4C4iso3VSF-eqaIjiFCbXKCFNyeEIW5WFsv189dhlSqU"

Local $sMessageId = "1712bc1dc22da2a2"

$oHttp.SetUrlVar("messageId",$sMessageId)
$oHttp.SetUrlVar("attachmentId",$sAttachmentId)

Local $sUrl = "https://www.googleapis.com/gmail/v1/users/userId/messages/{$messageId}/attachments/{$attachmentId}"

; When we download, the response is JSON that contains the attachment data base64url encoded, like this:
; {
;  "size": 934,
;  "data": "JVBERi0xLjM ... CiUlRU9GCg=="
; }

Local $sOutputFilePath = "qa_output/helloWorld.pdf"

; Download into a StringBuilder.
$oSbJson = ObjCreate("Chilkat.StringBuilder")
$bSuccess = $oHttp.DownloadSb($sUrl,"utf-8",$oSbJson)
If ($bSuccess = False) Then
    ConsoleWrite($oHttp.LastErrorText & @CRLF)
    Exit
EndIf

If ($oHttp.LastStatus <> 200) Then
    ; Something failed.
    ; the JSON contains an error message.
    ConsoleWrite($oSbJson.GetAsString() & @CRLF)
    Exit
EndIf

; Load into a Chilkat JSON object.
$oJson = ObjCreate("Chilkat.JsonObject")
$bSuccess = $oJson.LoadSb($oSbJson)

; Extract the base64url data into a BinData.
$oBd = ObjCreate("Chilkat.BinData")
$bSuccess = $oJson.BytesOf("data","base64url",$oBd)

; Save the data to a file.
$bSuccess = $oBd.WriteFile("qa_output/helloWorld.pdf")

ConsoleWrite("Success." & @CRLF)