(Xojo Plugin) ABN AMRO OAuth2 Client Credentials Authentication

Demonstrates how to obtain an access token for an ABN AMRO online API using OAuth2 with the Client Credentials flow.

Note: This example requires Chilkat v11.0.0 or greater.

For more information, see https://developer.abnamro.com/api/payment-initiation-v1/payment-initiation-tutorial

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Dim success As Boolean
success = False

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

// This example sends the following CURL request:

// 	curl -X POST -k https://auth-sandbox.connect.abnamro.com:8443/as/token.oauth2 \
// 	-v \
// 	--cert TPPCertificate.crt \
// 	--key TPPprivateKey.key \
// 	-H 'Cache-Control: no-cache' \
// 	-H 'Content-Type: application/x-www-form-urlencoded' \
// 	-d 'grant_type=client_credentials&client_id=TPP_test&scope=psd2:payment:sepa:write psd2:payment:sepa:read'

Dim cert As New Chilkat.Cert
success = cert.LoadFromFile("qa_data/certs/TPPCertificate.cer")
If (success = False) Then
    System.DebugLog(cert.LastErrorText)
    Return
End If

Dim bdKey As New Chilkat.BinData
success = bdKey.LoadFile("qa_data/certs/TPPprivateKey.key")

Dim privKey As New Chilkat.PrivateKey
success = privKey.LoadAnyFormat(bdKey,"passwordIfNeeded")
If (success = False) Then
    System.DebugLog(privKey.LastErrorText)
    Return
End If

success = cert.SetPrivateKey(privKey)
If (success = False) Then
    System.DebugLog(cert.LastErrorText)
    Return
End If

Dim http As New Chilkat.Http

success = http.SetSslClientCert(cert)
If (success = False) Then
    System.DebugLog(http.LastErrorText)
    Return
End If

Dim req As New Chilkat.HttpRequest
req.AddParam "grant_type","client_credentials"
req.AddParam "client_id","TPP_test"
req.AddParam "scope","psd2:payment:sepa:write psd2:payment:sepa:read"

req.HttpVerb = "POST"
req.ContentType = "application/x-www-form-urlencoded"

Dim resp As New Chilkat.HttpResponse
success = http.HttpReq("https://auth-sandbox.connect.abnamro.com:8443/as/token.oauth2",req,resp)
If (success = False) Then
    System.DebugLog(http.LastErrorText)
    Return
End If

If (resp.StatusCode <> 200) Then
    System.DebugLog(resp.BodyStr)
    Return
End If

// Get the JSON result:
// {"access_token":"TIhycwl8rfrZPkXGw15mwldASAAK","token_type":"Bearer","expires_in":7200}
Dim json As New Chilkat.JsonObject
success = json.Load(resp.BodyStr)
System.DebugLog("access_token: " + json.StringOf("access_token"))
System.DebugLog("token_type: " + json.StringOf("token_type"))
System.DebugLog("expires_in: " + json.StringOf("expires_in"))