(Delphi ActiveX) Okta: Use the Resource Owner Password Flow

Demonstrates how to get an access token using the Resource Owner Password Flow.

For more information, see https://developer.okta.com/docs/guides/implement-password/use-flow/

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;
req: TChilkatHttpRequest;
resp: IChilkatHttpResponse;
sbResponseBody: TChilkatStringBuilder;
jResp: TChilkatJsonObject;
respStatusCode: Integer;
access_token: WideString;
token_type: WideString;
expires_in: Integer;
scope: WideString;
id_token: WideString;

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

http := TChilkatHttp.Create(Self);

// Implements the following CURL command:

// curl --request POST \
//   --url https://{yourOktaDomain}/oauth2/default/v1/token \
//   --header 'accept: application/json' \
//   --user "client_id:client_secret" \
//   --header 'content-type: application/x-www-form-urlencoded' \
//   --data 'grant_type=password&username=myUserEmail&password=myPassword&scope=openid'

http.Login := 'client_id';
http.Password := 'client_secret';

req := TChilkatHttpRequest.Create(Self);
req.HttpVerb := 'POST';
req.Path := '/oauth2/default/v1/token';
req.ContentType := 'application/x-www-form-urlencoded';
req.AddParam('grant_type','password');
req.AddParam('username','myUserEmail');
req.AddParam('password','myPassword');
req.AddParam('scope','openid');

req.AddHeader('accept','application/json');

resp := http.PostUrlEncoded('https://{yourOktaDomain}/oauth2/default/v1/token',req.ControlInterface);
if (http.LastMethodSuccess = 0) then
  begin
    Memo1.Lines.Add(http.LastErrorText);
    Exit;
  end;

sbResponseBody := TChilkatStringBuilder.Create(Self);
resp.GetBodySb(sbResponseBody.ControlInterface);
jResp := TChilkatJsonObject.Create(Self);
jResp.LoadSb(sbResponseBody.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;

// Sample JSON response:
// (Sample code for parsing the JSON response is shown below)

// {
//   "access_token": "eyJraWQiOi ... jmiHD7wY9_gQ",
//   "token_type": "Bearer",
//   "expires_in": 3600,
//   "scope": "openid",
//   "id_token": "eyJraWQiOiJ ... W7KkWiPJnUSMoGw"
// }

// Sample code for parsing the JSON response...
// Use the following online tool to generate parsing code from sample JSON:
// Generate Parsing Code from JSON

access_token := jResp.StringOf('access_token');
token_type := jResp.StringOf('token_type');
expires_in := jResp.IntOf('expires_in');
scope := jResp.StringOf('scope');
id_token := jResp.StringOf('id_token');
end;