(Delphi ActiveX) 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 for Delphi Downloads Chilkat ActiveX DLL for Delphi Chilkat non-ActiveX DLL for Delphi * The examples here use the ActiveX DLL.

uses
    Winapi.Windows, Winapi.Messages, System.SysUtils, System.Variants, System.Classes, Vcl.Graphics,
    Vcl.Controls, Vcl.Forms, Vcl.Dialogs, Vcl.StdCtrls, Chilkat_TLB;

...

procedure TForm1.Button1Click(Sender: TObject);
var
http: TChilkatHttp;
success: Integer;
cert: TChilkatCert;
bdPrivKey: TChilkatBinData;
privKey: TPrivateKey;
req: TChilkatHttpRequest;
resp: IChilkatHttpResponse;
jResp: TChilkatJsonObject;
respStatusCode: Integer;

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

http := TChilkatHttp.Create(Self);

// First load the certificate and private key, and set as the HTTP object's client certificate.
cert := TChilkatCert.Create(Self);
success := cert.LoadFromFile('<nome arquivo certificado>.crt');
if (success = 0) then
  begin
    Memo1.Lines.Add(cert.LastErrorText);
    Exit;
  end;

bdPrivKey := TChilkatBinData.Create(Self);
success := bdPrivKey.LoadFile('<nome arquivo chave privada>.key');
if (success = 0) then
  begin
    Memo1.Lines.Add('Failed to load <nome');
    Exit;
  end;

privKey := TPrivateKey.Create(Self);
success := privKey.LoadAnyFormat(bdPrivKey.ControlInterface,'');
if (success = 0) then
  begin
    Memo1.Lines.Add(privKey.LastErrorText);
    Exit;
  end;

success := cert.SetPrivateKey(privKey.ControlInterface);
if (success = 0) then
  begin
    Memo1.Lines.Add(cert.LastErrorText);
    Exit;
  end;

success := http.SetSslClientCert(cert.ControlInterface);
if (success = 0) then
  begin
    Memo1.Lines.Add(http.LastErrorText);
    Exit;
  end;

req := TChilkatHttpRequest.Create(Self);
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');

resp := http.PostUrlEncoded('https://cdpj.partners.bancointer.com.br/oauth/v2/token',req.ControlInterface);
if (http.LastMethodSuccess = 0) then
  begin
    Memo1.Lines.Add(http.LastErrorText);
    Exit;
  end;

jResp := TChilkatJsonObject.Create(Self);
resp.GetBodyJson(jResp.ControlInterface);
jResp.EmitCompact := 0;

Memo1.Lines.Add('Response Body:');
Memo1.Lines.Add(jResp.Emit());

respStatusCode := resp.StatusCode;
Memo1.Lines.Add('Response Status Code = ' + IntToStr(respStatusCode));
if (respStatusCode >= 400) then
  begin
    Memo1.Lines.Add('Response Header:');
    Memo1.Lines.Add(resp.Header);
    Memo1.Lines.Add('Failed.');

    Exit;
  end;

success := jResp.WriteFile('qa_data/tokens/banco_inter_client_credentials.json');
if (success = 0) then
  begin
    Memo1.Lines.Add('Failed to save JSON access token file.');
    Exit;
  end;

Memo1.Lines.Add('Success.');
end;