(AutoIt) PayPal -- Get an OAuth 2.0 Access Token

Demonstrates how to send a request to get a PayPal OAuth2 access token. Sends an HTTP request equivalent to the following:

curl https://api.sandbox.paypal.com/v1/oauth2/token \
  -H "Accept: application/json" \
  -H "Accept-Language: en_US" \
  -u "Client-Id:Secret" \
  -d "grant_type=client_credentials"

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

; Note: Requires Chilkat v9.5.0.64 or greater.

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

$oRest = ObjCreate("Chilkat.Rest")

; Make the initial connection.
; A single REST object, once connected, can be used for many PayPal REST API calls.
; The auto-reconnect indicates that if the already-established HTTPS connection is closed,
; then it will be automatically re-established as needed.
Local $bAutoReconnect = True
Local $bSuccess = $oRest.Connect("api.sandbox.paypal.com",443,True,$bAutoReconnect)
If ($bSuccess <> True) Then
    ConsoleWrite($oRest.LastErrorText & @CRLF)
    Exit
EndIf

; Duplicate this request:

; 	curl https://api.sandbox.paypal.com/v1/oauth2/token \
; 	  -H "Accept: application/json" \
; 	  -H "Accept-Language: en_US" \
; 	  -u "Client-Id:Secret" \
; 	  -d "grant_type=client_credentials"

$oRest.AddHeader("Accept","application/json")
$oRest.AddHeader("Accept-Language","en_US")

; For additional help on where to find  your client ID and API secret, see PayPal Client_ID and API_Secret
$oRest.SetAuthBasic("PAYPAL_REST_API_CLIENT_ID","PAYPAL_REST_API_SECRET")

$oRest.AddQueryParam("grant_type","client_credentials")

Local $sResponseStr = $oRest.FullRequestFormUrlEncoded("POST","/v1/oauth2/token")
If ($oRest.LastMethodSuccess <> True) Then
    ConsoleWrite($oRest.LastErrorText & @CRLF)
    Exit
EndIf

ConsoleWrite($oRest.LastRequestHeader & @CRLF)

; A sample response:

; 	{
; 	  "scope": "https://api.paypal.com/v1/payments/.* https://api.paypal.com/v1/vault/credit-card https://api.paypal.com/v1/vault/credit-card/.*",
; 	  "access_token": "EEwJ6tF9x5WCIZDYzyZGaz6Khbw7raYRIBV_WxVvgmsG",
; 	  "token_type": "Bearer",
; 	  "app_id": "APP-6XR95014BA15863X",
; 	  "expires_in": 28800
; 	}

$oJson = ObjCreate("Chilkat.JsonObject")
$oJson.Load($sResponseStr)
$oJson.EmitCompact = False

; Check the response status code.  A 200 indicates success..
If ($oRest.ResponseStatusCode <> 200) Then
    ConsoleWrite($oJson.Emit() & @CRLF)
    ConsoleWrite("Failed." & @CRLF)
    Exit
EndIf

; Given that the access token expires in approx 8 hours,
; let's record the date/time this token was created.
; This will allow us to know beforehand if the token
; is expired (and we can then fetch a new token).
$oDateTime = ObjCreate("Chilkat.CkDateTime")
Local $bLocalTime = False
Local $iDtNow = $oDateTime.GetAsUnixTime($bLocalTime)
$oJson.AppendInt("tokenCreateTimeUtc",$iDtNow)

; Examine the access token and save to a file.
ConsoleWrite("Access Token: " & $oJson.StringOf("access_token") & @CRLF)
ConsoleWrite("Full JSON Response:" & @CRLF)
ConsoleWrite($oJson.Emit() & @CRLF)

$oSbResponse = ObjCreate("Chilkat.StringBuilder")
$oSbResponse.Append($oJson.Emit())
Local $bEmitBom = False
$oSbResponse.WriteFile("qa_data/tokens/paypal.json","utf-8",$bEmitBom)