(AutoIt) PayPal Generate QR Code

Generates a QR code for an invoice, by ID.

The QR code is a PNG image in Base64-encoded format that corresponds to the invoice ID.

Note: A QR code can only be generated for an invoice that has been both created and sent.

See also Generate QR Code

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.

; Load our previously obtained access token. (see PayPal OAuth2 Access Token)
$oJsonToken = ObjCreate("Chilkat.JsonObject")
$oJsonToken.LoadFile("qa_data/tokens/paypal.json")

; Build the Authorization request header field value.
$oSbAuth = ObjCreate("Chilkat.StringBuilder")
; token_type should be "Bearer"
$oSbAuth.Append($oJsonToken.StringOf("token_type"))
$oSbAuth.Append(" ")
$oSbAuth.Append($oJsonToken.StringOf("access_token"))

; 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.
$oRest = ObjCreate("Chilkat.Rest")
Local $bAutoReconnect = True
Local $bSuccess = $oRest.Connect("api.sandbox.paypal.com",443,True,$bAutoReconnect)
If ($bSuccess <> True) Then
    ConsoleWrite($oRest.LastErrorText & @CRLF)
    Exit
EndIf

; ----------------------------------------------------------------------------------------------
; The code above this comment could be placed inside a function/subroutine within the application
; because the connection does not need to be made for every request.  Once the connection is made
; the app may send many requests..
; ----------------------------------------------------------------------------------------------

; Build a path using an invoice ID.
$oSbPath = ObjCreate("Chilkat.StringBuilder")
$oSbPath.Append("/v1/invoicing/invoices/invoice_id/qr-code")
Local $iNumReplacements = $oSbPath.Replace("invoice_id","INV2-ZG2H-HKAW-PMWU-N6ZR")

$oRest.AddHeader("Authorization",$oSbAuth.GetAsString())
; A 500x500 image results in a PNG file of approx. 4K bytes in size.
$oRest.AddQueryParam("width","500")
$oRest.AddQueryParam("height","500")
$oRest.AddQueryParam("action","pay")

; Send the GET request and get the PNG image data as base64.
; A successful JSON response looks like this:
; {"image":"iVBORw0KGgoAA....AASUVORK5CYII="}
$oSbJsonResponse = ObjCreate("Chilkat.StringBuilder")
$bSuccess = $oRest.FullRequestNoBodySb("GET",$oSbPath.GetAsString(),$oSbJsonResponse)
If ($bSuccess <> True) Then
    ConsoleWrite($oRest.LastErrorText & @CRLF)
    Exit
EndIf

$oJson = ObjCreate("Chilkat.JsonObject")
$oJson.EmitCompact = False
$oJson.LoadSb($oSbJsonResponse)

ConsoleWrite("Response Status Code = " & $oRest.ResponseStatusCode & @CRLF)

; Did we get a 200 success response?
If ($oRest.ResponseStatusCode <> 200) Then
    ConsoleWrite($oJson.Emit() & @CRLF)
    ConsoleWrite("Failed." & @CRLF)
    Exit
EndIf

; If the 200 response is received, the response body contains the PNG data.
; Save the PNG to a file.
$oPngData = ObjCreate("Chilkat.BinData")
$oPngData.AppendEncoded($oJson.StringOf("image"),"base64")
$bSuccess = $oPngData.WriteFile("qa_output/paypal_qr_code.png")
If ($bSuccess = False) Then
    ConsoleWrite("Failed to save PNG file." & @CRLF)
    Exit
EndIf

ConsoleWrite("Success." & @CRLF)