(VB.NET) Banco Inter OAuth2 Client Credentials

Generate an OAuth2 access token needed to consume the Inter APIs.

For more information, see https://developers.bancointer.com.br/reference/token-3

Chilkat .NET Downloads Chilkat .NET Framework Chilkat for .NET Core

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

Dim http As New Chilkat.Http
Dim success As Boolean

' First load the certificate and private key, and set as the HTTP object's client certificate.
Dim cert As New Chilkat.Cert
success = cert.LoadFromFile("<nome arquivo certificado>.crt")
If (success = False) Then
    Debug.WriteLine(cert.LastErrorText)
    Exit Sub
End If


Dim bdPrivKey As New Chilkat.BinData
success = bdPrivKey.LoadFile("<nome arquivo chave privada>.key")
If (success = False) Then
    Debug.WriteLine("Failed to load <nome")
    Exit Sub
End If


Dim privKey As New Chilkat.PrivateKey
success = privKey.LoadAnyFormat(bdPrivKey,"")
If (success = False) Then
    Debug.WriteLine(privKey.LastErrorText)
    Exit Sub
End If


success = cert.SetPrivateKey(privKey)
If (success = False) Then
    Debug.WriteLine(cert.LastErrorText)
    Exit Sub
End If


success = http.SetSslClientCert(cert)
If (success = False) Then
    Debug.WriteLine(http.LastErrorText)
    Exit Sub
End If



Dim req As New Chilkat.HttpRequest
req.HttpVerb = "POST"
req.Path = "/oauth/v2/token"
req.ContentType = "application/x-www-form-urlencoded"
req.AddParam("grant_type","client_credentials")
' Requested scopes in OAuth2 are typically SPACE separated.
req.AddParam("scope","boleto-cobranca.read boleto-cobranca.write")
req.AddHeader("accept","application/json")

Dim resp As Chilkat.HttpResponse = http.PostUrlEncoded("https://cdpj.partners.bancointer.com.br/oauth/v2/token",req)
If (http.LastMethodSuccess = False) Then
    Debug.WriteLine(http.LastErrorText)
    Exit Sub
End If


Dim jResp As New Chilkat.JsonObject
resp.GetBodyJson(jResp)
jResp.EmitCompact = False

Debug.WriteLine("Response Body:")
Debug.WriteLine(jResp.Emit())

Dim respStatusCode As Integer = resp.StatusCode
Debug.WriteLine("Response Status Code = " & respStatusCode)
If (respStatusCode >= 400) Then
    Debug.WriteLine("Response Header:")
    Debug.WriteLine(resp.Header)
    Debug.WriteLine("Failed.")

    Exit Sub
End If



success = jResp.WriteFile("qa_data/tokens/banco_inter_client_credentials.json")
If (success = False) Then
    Debug.WriteLine("Failed to save JSON access token file.")
    Exit Sub
End If


Debug.WriteLine("Success.")