Pascal (Lazarus/Delphi)

UPS OAuth2 Client Credentials

See more UPS Examples

Get an OAuth2 access token for the UPS REST API using the client credentials flow (no interactivity with a web browser required). 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.StringBuilder,
  Chilkat.JsonObject;

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

procedure RunDemo;
var
  success: Boolean;
  http: THttp;
  req: THttpRequest;
  resp: THttpResponse;
  sbResponseBody: TStringBuilder;
  jResp: TJsonObject;
  respStatusCode: Integer;
  token_type: string;
  issued_at: string;
  client_id: string;
  access_token: string;
  expires_in: string;
  status: string;

begin
  success := False;

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

  http := THttp.Create;

  //  Implements the following CURL command:

  //  curl -i -X POST \
  //    -u 2498righ8wr6aihe98rt8rhowirtyw9er6twe80rtywrehrt:nerf254578uh8rgt7y3h57358ouyth387h8h53h6yyh80hh578per9y7u5ruyuy4 \
  //    https://wwwcie.ups.com/security/v1/oauth/token \
  //    -H 'Content-Type: application/x-www-form-urlencoded' \
  //    -H 'x-merchant-id: 7B3027' \
  //    -d grant_type=client_credentials

  //  Use the following online tool to generate HTTP code from a CURL command
  //  Convert a cURL Command to HTTP Source Code

  http.BasicAuth := True;
  http.Login := '2498righ8wr6aihe98rt8rhowirtyw9er6twe80rtywrehrt';
  http.Password := 'nerf254578uh8rgt7y3h57358ouyth387h8h53h6yyh80hh578per9y7u5ruyuy4';

  req := THttpRequest.Create;
  req.AddParam('grant_type','client_credentials');

  req.AddHeader('x-merchant-id','7B3027');

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

  resp := THttpResponse.Create;
  success := http.HttpReq('https://wwwcie.ups.com/security/v1/oauth/token',req,resp);
  if (success = False) then
    begin
      WriteLn(http.LastErrorText);
      Exit;
    end;

  sbResponseBody := TStringBuilder.Create;
  resp.GetBodySb(sbResponseBody);

  jResp := TJsonObject.Create;
  jResp.LoadSb(sbResponseBody);
  jResp.EmitCompact := False;

  WriteLn('Response Body:');
  WriteLn(jResp.Emit());

  respStatusCode := resp.StatusCode;
  WriteLn('Response Status Code = ' + respStatusCode);
  if (respStatusCode >= 400) then
    begin
      WriteLn('Response Header:');
      WriteLn(resp.Header);
      WriteLn('Failed.');
      Exit;
    end;

  //  Save the OAuth2 access token for other examples to use.
  jResp.WriteFile('qa_data/tokens/ups_oauth2_token.json');

  //  If successful, the OAuth2 access token JSON looks like this:

  //  {
  //    "token_type": "Bearer",
  //    "issued_at": "1686911985606",
  //    "client_id": "2498righ8wr6aihe98rt8rhowirtyw9er6twe80rtywrehrt",
  //    "access_token": "eyJraW......R2sbqrY",
  //    "expires_in": "14399",
  //    "status": "approved"
  //  }

  token_type := jResp.StringOf('token_type');
  issued_at := jResp.StringOf('issued_at');
  client_id := jResp.StringOf('client_id');
  access_token := jResp.StringOf('access_token');
  expires_in := jResp.StringOf('expires_in');
  status := jResp.StringOf('status');


  http.Free;
  req.Free;
  resp.Free;
  sbResponseBody.Free;
  jResp.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.