(Visual Basic 6.0) 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 ActiveX Downloads ActiveX for 32-bit and 64-bit Windows

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

Dim http As New ChilkatHttp
Dim success As Long

' First load the certificate and private key, and set as the HTTP object's client certificate.
Dim cert As New ChilkatCert
success = cert.LoadFromFile("<nome arquivo certificado>.crt")
If (success = 0) Then
    Debug.Print cert.LastErrorText
    Exit Sub
End If

Dim bdPrivKey As New ChilkatBinData
success = bdPrivKey.LoadFile("<nome arquivo chave privada>.key")
If (success = 0) Then
    Debug.Print "Failed to load <nome"
    Exit Sub
End If

Dim privKey As New PrivateKey
success = privKey.LoadAnyFormat(bdPrivKey,"")
If (success = 0) Then
    Debug.Print privKey.LastErrorText
    Exit Sub
End If

success = cert.SetPrivateKey(privKey)
If (success = 0) Then
    Debug.Print cert.LastErrorText
    Exit Sub
End If

success = http.SetSslClientCert(cert)
If (success = 0) Then
    Debug.Print http.LastErrorText
    Exit Sub
End If

Dim req As New ChilkatHttpRequest
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 ChilkatHttpResponse
Set resp = http.PostUrlEncoded("https://cdpj.partners.bancointer.com.br/oauth/v2/token",req)
If (http.LastMethodSuccess = 0) Then
    Debug.Print http.LastErrorText
    Exit Sub
End If

Dim jResp As New ChilkatJsonObject
success = resp.GetBodyJson(jResp)
jResp.EmitCompact = 0

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

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

    Exit Sub
End If

success = jResp.WriteFile("qa_data/tokens/banco_inter_client_credentials.json")
If (success = 0) Then
    Debug.Print "Failed to save JSON access token file."
    Exit Sub
End If

Debug.Print "Success."