(AutoIt) MercadoLibre Refresh OAuth2 Access Token

Demonstrates how to refresh a MercadoLibre OAuth2 access token. The refresh does not require user interaction via a web browser. If an access token expires (typically with a 401 response code), a new access token can be automatically obtained by using the code in this example.

For more information, see https://developers.mercadolibre.com.ar/es_ar/autenticacion-y-autorizacion#Refresh-token

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.

; It is assumed we previously obtained an OAuth2 access token.
; This example loads the JSON access token file 
; saved by this example: Get MercadoLibre OAuth2 Access Token

$oJsonToken = ObjCreate("Chilkat.JsonObject")
Local $bSuccess = $oJsonToken.LoadFile("qa_data/tokens/mercadolibre.json")
If ($bSuccess <> True) Then
    ConsoleWrite("Failed to load mercadolibre.json" & @CRLF)
    Exit
EndIf

; The access token JSON looks like this:

; {
;   "access_token": "APP_USR-8133606632685744-060115-93e1fd8b5e767c51c238df347bd0b288-577628017",
;   "token_type": "bearer",
;   "expires_in": 21600,
;   "scope": "offline_access read write",
;   "user_id": 577625107,
;   "refresh_token": "TG-5ad522a286f1200006ac4ed1-577625007"
; }

$oOauth2 = ObjCreate("Chilkat.OAuth2")

$oOauth2.TokenEndpoint = "https://api.mercadolibre.com/oauth/token"

; Replace these with actual values.
$oOauth2.ClientId = "MY_MERCADOLIBRE_APP_ID"
$oOauth2.ClientSecret = "MY_MERCADOLIBRE_APP_SECRET"

; Get the "refresh_token"
$oOauth2.RefreshToken = $oJsonToken.StringOf("refresh_token")

; Send the HTTP POST to refresh the access token..
$bSuccess = $oOauth2.RefreshAccessToken()
If ($bSuccess <> True) Then
    ConsoleWrite($oOauth2.LastErrorText & @CRLF)
    Exit
EndIf

ConsoleWrite("New access token: " & $oOauth2.AccessToken & @CRLF)
ConsoleWrite("New refresh token: " & $oOauth2.RefreshToken & @CRLF)

; Update the JSON with the new tokens.
$oJsonToken.UpdateString("access_token",$oOauth2.AccessToken)
$oJsonToken.UpdateString("refresh_token",$oOauth2.RefreshToken)

; Save the new JSON access token response to a file.
$oSbJson = ObjCreate("Chilkat.StringBuilder")
$oJsonToken.EmitCompact = False
$oJsonToken.EmitSb($oSbJson)
$oSbJson.WriteFile("qa_data/tokens/mercadolibre.json","utf-8",False)

ConsoleWrite("OAuth2 authorization granted!" & @CRLF)
ConsoleWrite("New Access Token = " & $oOauth2.AccessToken & @CRLF)