Pascal (Lazarus/Delphi)

Refresh eBay Application Access Token

See more eBay Examples

This example shows how to get a new eBay REST API access token when the original is close to expiration. 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.JsonObject,
  Chilkat.OAuth2;

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

procedure RunDemo;
var
  success: Boolean;
  json: TJsonObject;
  oauth2: TOAuth2;

begin
  success := False;

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

  //  The previously fetched eBay access token looks like this:

  //  {
  //    "access_token": "v^1.1#i^1# ... HwSAAA=",
  //    "expires_in": 7200,
  //    "refresh_token": "v^1.1#i^1# ... FXjEyODQ=",
  //    "refresh_token_expires_in": 47304000,
  //    "token_type": "User Access Token"
  //  }

  json := TJsonObject.Create;
  success := json.LoadFile('qa_data/tokens/ebay-access-token.json');
  if (success = False) then
    begin
      WriteLn('Failed to load the existing ebay access token JSON.');
      Exit;
    end;

  oauth2 := TOAuth2.Create;

  oauth2.TokenEndpoint := 'https://api.sandbox.ebay.com/identity/v1/oauth2/token';

  //  Replace these with actual values.
  oauth2.ClientId := 'EBAY_CLIENT_ID';
  oauth2.ClientSecret := 'EBAY_CLIENT_SECRET';

  //  Get the "refresh_token"
  oauth2.RefreshToken := json.StringOf('refresh_token');

  //  Send the HTTP POST to refresh the access token..
  success := oauth2.RefreshAccessToken();
  if (success = False) then
    begin
      WriteLn(oauth2.LastErrorText);
      Exit;
    end;

  //  Load the access token response into the JSON object 
  json.Load(oauth2.AccessTokenResponse);

  //  Save the new JSON access token response to a file.
  //  The access + refresh tokens contained in this JSON will be needed for the next refresh.
  json.EmitCompact := False;
  json.WriteFile('qa_data/tokens/ebay-access-token.json');

  WriteLn('OAuth2 authorization granted!');
  WriteLn('New Access Token = ' + oauth2.AccessToken);


  json.Free;
  oauth2.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.