Pascal (Lazarus/Delphi)

Rabobank OAuth2 Access Token

See more OAuth2 Examples

Demonstrates how to get an OAuth 2.0 access token to access Rabobank API's

Important: This example is for desktop apps only. (It is not for web-based applications.)

Your app defined in the Rabobank portal should look something like this. (Our test app is named "chilkat". You should name your app something else.)

Pascal (Lazarus/Delphi)

program ChilkatDemo;

// Demonstrates using the Chilkat Pascal wrapper via the C bridge DLL.
// Builds as a console application under Lazarus (FPC) or Delphi.

{$IFDEF FPC}
  {$MODE DELPHI}
{$ENDIF}
{$APPTYPE CONSOLE}

uses
  {$IFDEF UNIX}
  cthreads,
  {$ENDIF}
  SysUtils,
  CkDllLoader,
  Chilkat.FileAccess,
  Chilkat.OAuth2,
  Chilkat.JsonObject;

// ---------------------------------------------------------------------------

procedure RunDemo;
var
  success: Boolean;
  oauth2: TOAuth2;
  url: string;
  numMsWaited: Integer;
  json: TJsonObject;
  fac: TFileAccess;

begin
  success := False;

  //  For more information about the OAuth2, see OAuth 2.0 Authorization Flow

  oauth2 := TOAuth2.Create;

  //  This should be the port in the localhost callback URL for your app.  
  //  The callback URL would look like "http://localhost:3017/" if the port number is 3017.
  oauth2.ListenPort := 3017;

  //  IMPORTANT: Don't forget to subscribe your Rabobank application to the OAuth 2.0 services in the Rabobank Online Developer Portal.
  //  IMPORTANT: Don't forget to subscribe your Rabobank application to the OAuth 2.0 services in the Rabobank Online Developer Portal.
  //  IMPORTANT: Don't forget to subscribe your Rabobank application to the OAuth 2.0 services in the Rabobank Online Developer Portal.
  //  IMPORTANT: Don't forget to subscribe your Rabobank application to the OAuth 2.0 services in the Rabobank Online Developer Portal.

  //  See also https://developer.rabobank.nl/faq

  oauth2.AuthorizationEndpoint := 'https://api-sandbox.rabobank.nl/openapi/sandbox/oauth2/authorize';
  oauth2.TokenEndpoint := 'https://api-sandbox.rabobank.nl/openapi/sandbox/oauth2/token';

  //  Replace these with actual values.
  oauth2.ClientId := 'YOUR_APP_CLIENT_ID';
  //  This is your app password:
  oauth2.ClientSecret := 'YOUR_APP_CLIENT_SECRET';

  oauth2.CodeChallenge := False;
  //  Provide a SPACE separated list of scopes, as defined in the Rabobank API documentation, 
  //  such as at https://developer-sandbox.rabobank.nl/reference/accounts-ais-sb/3-0-8

  //  Important: To get a refresh token in the final response, you have to ask for "offline_access" scope
  oauth2.Scope := 'ais.balances.read ais.transactions.read-90days ais.transactions.read-history';

  //  Begin the OAuth2 Authorization code flow.  This returns a URL that should be loaded in a browser.
  url := oauth2.StartAuth();
  if (oauth2.LastMethodSuccess <> True) then
    begin
      WriteLn(oauth2.LastErrorText);
      Exit;
    end;

  WriteLn('url = ' + url);

  //  Launch the default browser on the system and navigate to the url.
  //  The LaunchBrowser method was added in Chilkat v10.1.2.
  success := oauth2.LaunchBrowser(url);
  if (success = False) then
    begin
      WriteLn(oauth2.LastErrorText);
      Exit;
    end;

  //  Wait for the user to approve or deny authorization in the browser.
  numMsWaited := 0;
  while (numMsWaited < 90000) and (oauth2.AuthFlowState < 3) do
    begin
      oauth2.SleepMs(100);
      numMsWaited := numMsWaited + 100;
    end;

  //  If the browser does not respond within the specified time, AuthFlowState will be:
  //  
  //  1: Waiting for Redirect - The OAuth2 background thread is waiting for the browser's redirect request.
  //  2: Waiting for Final Response - The thread is awaiting the final access token response.
  //  In either case, cancel the background task initiated by StartAuth.

  if (oauth2.AuthFlowState < 3) then
    begin
      oauth2.Cancel();
      WriteLn('No response from the browser!');
      Exit;
    end;

  //  Check AuthFlowState to determine if authorization was granted, denied, or failed:
  //  
  //  3: Success - OAuth2 flow completed, the background thread exited, and the successful response is in AccessTokenResponse.
  //  4: Access Denied - OAuth2 flow completed, the background thread exited, and the error response is in AccessTokenResponse.
  //  5: Failure - OAuth2 flow failed before completion, the background thread exited, and error details are in FailureInfo.

  if (oauth2.AuthFlowState = 5) then
    begin
      WriteLn('OAuth2 failed to complete.');
      WriteLn(oauth2.FailureInfo);
      Exit;
    end;

  if (oauth2.AuthFlowState = 4) then
    begin
      WriteLn('OAuth2 authorization was denied.');
      WriteLn(oauth2.AccessTokenResponse);
      Exit;
    end;

  if (oauth2.AuthFlowState <> 3) then
    begin
      WriteLn('Unexpected AuthFlowState:' + oauth2.AuthFlowState);
      Exit;
    end;
  WriteLn('OAuth2 authorization granted!');
  WriteLn('Access Token = ' + oauth2.AccessToken);

  //  Get the full JSON response:
  json := TJsonObject.Create;
  json.Load(oauth2.AccessTokenResponse);
  json.EmitCompact := False;

  //  The JSON response looks like this:

  //  {
  //    "token_type": "Bearer",
  //    "access_token": "AAIkYTU0ZWM ... sxE0KL0HHWw",
  //    "expires_in": 3600,
  //    "consented_on": 1584641121,
  //    "scope": "ais.balances.read ais.transactions.read-90days ais.transactions.read-history",
  //    "refresh_token": "AAJXXSdN ... Uiblz9ILkxNBlytRGA",
  //    "refresh_token_expires_in": 157784760,
  //    "expires_on": "1584644722"
  //  }

  WriteLn(json.Emit());

  //  Save the JSON to a file to be used in future requests.
  fac := TFileAccess.Create;
  fac.WriteEntireTextFile('qa_data/tokens/rabobank.json',json.Emit(),'utf-8',False);


  oauth2.Free;
  json.Free;
  fac.Free;

end;

// ---------------------------------------------------------------------------

begin

  try
    RunDemo;
  except
    on E: Exception do
      WriteLn('Unhandled exception: ', E.ClassName, ': ', E.Message);
  end;

  WriteLn;
  {$IFDEF MSWINDOWS}
  WriteLn('Press Enter to exit...');
  ReadLn;
  {$ENDIF}
end.