Pascal (Lazarus/Delphi)

MyInvois Malaysia Login as Intermediary System

See more Malaysia MyInvois Examples

Demonstrates how to get an OAuth2 access token with an intermediary that is representing a taxpayer (acting on behalf of a specific taxpayer). The OAuth2 access token can then be used to access MyInvois protected APIs. 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.Http,
  Chilkat.HttpRequest,
  Chilkat.HttpResponse,
  Chilkat.JsonObject;

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

procedure RunDemo;
var
  success: Boolean;
  http: THttp;
  req: THttpRequest;
  resp: THttpResponse;
  json: TJsonObject;
  access_token: string;
  expires_in: Integer;
  token_type: string;
  scope: string;

begin
  success := False;

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

  //  Sends the following HTTP POST to get a MyInvois OAUth2 access token using client_credentials

  //  POST /connect/token HTTP/1.1
  //  Host: preprod-api.myinvois.hasil.gov.my
  //  Accept: */*
  //  Content-Length: <<variable>>
  //  Content-Type: application/x-www-form-urlencoded
  //  onbehalfof: C25845632020
  //  
  //  client_id={YOUR_CLIENT_ID}&client_secret={YOUR_CLIENT_SECRET}&grant_type=client_credentials&scope=InvoicingAPI

  http := THttp.Create;

  req := THttpRequest.Create;

  req.AddHeader('onbehalfof','C25845632020');

  req.AddParam('grant_type','client_credentials');
  req.AddParam('client_id','YOUR_CLIENT_ID');
  req.AddParam('client_secret','YOUR_CLIENT_SECRET');
  req.AddParam('scope','InvoicingAPI');

  req.HttpVerb := 'POST';
  req.ContentType := 'application/x-www-form-urlencoded';

  resp := THttpResponse.Create;
  success := http.HttpReq('https://preprod-api.myinvois.hasil.gov.my/connect/token',req,resp);
  if (success = False) then
    begin
      WriteLn(http.LastErrorText);
      Exit;
    end;

  //  Note: The returned access token is valid for a short amount of time.  Perhaps 1 hour.
  //  The access token is used in the "Authorization: Bearer <access_token>" header in subsequent requests until it expires.
  //  Your application would then need to get a new access token, and so on..

  WriteLn('Response Status Code: ' + resp.StatusCode);
  WriteLn('Response Body:');
  WriteLn(resp.BodyStr);

  //  Here's a sample response:

  //  {
  //    "access_token": "eyJhbGciOiJSUzI1...",
  //    "expires_in": 3600,
  //    "token_type": "Bearer",
  //    "scope": "InvoicingAPI"
  //  }

  json := TJsonObject.Create;
  json.Load(resp.BodyStr);
  access_token := json.StringOf('access_token');
  expires_in := json.IntOf('expires_in');
  token_type := json.StringOf('token_type');
  scope := json.StringOf('scope');

  //  To use an access token in a MyInvois API call, see Using a MyInvois Access Token in an API Request


  http.Free;
  req.Free;
  resp.Free;
  json.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.