Pascal (Lazarus/Delphi)

Google OAuth2 v3 userinfo (https://www.googleapis.com/oauth2/v3/userinfo)

See more Google APIs Examples

Demonstrates how to get the Google OAuth2 v3 userinfo.

Important: Make sure the OAuth2 access token included "profile" in the list of scopes.

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.StringBuilder,
  Chilkat.JsonObject;

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

procedure RunDemo;
var
  success: Boolean;
  jsonToken: TJsonObject;
  http: THttp;
  sbResponseBody: TStringBuilder;
  json: TJsonObject;

begin
  success := False;

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

  //  It is assumed we previously obtained an OAuth2 access token.
  //  This example loads the JSON access token file 
  //  originally obtained by this example: Get Google People API OAuth2 Access Token
  //  or refreshed by this example: Refresh Google People API OAuth2 Access Token

  jsonToken := TJsonObject.Create;
  success := jsonToken.LoadFile('qa_data/tokens/googlePeople.json');
  if (success <> True) then
    begin
      WriteLn('Failed to load googleContacts.json');
      Exit;
    end;

  http := THttp.Create;

  //  -------------------------------------------------------------------------------------
  //  Make sure the access token was obtained with "profile" included in the list of scopes.
  //  -------------------------------------------------------------------------------------
  http.AuthToken := jsonToken.StringOf('access_token');

  sbResponseBody := TStringBuilder.Create;
  success := http.QuickGetSb('https://www.googleapis.com/oauth2/v3/userinfo',sbResponseBody);
  if (success = False) then
    begin
      WriteLn(http.LastErrorText);
      WriteLn(sbResponseBody.GetAsString());
      Exit;
    end;

  //  Sample JSON Response

  json := TJsonObject.Create;
  json.EmitCompact := False;
  json.Load(sbResponseBody.GetAsString());
  WriteLn(json.Emit());

  //  Sample response:

  //  {
  //    "sub": "119999690625687999964",
  //    "name": "Matt",
  //    "given_name": "Matt",
  //    "picture": "https://lh3.googleusercontent.com/-b4...eg3Zjo/AAAAAAAAAAI/AAAAAAAAAAA/AMZuu....3RpdA/s96-c/photo.jpg",
  //    "locale": "en"
  //  }
  //  


  jsonToken.Free;
  http.Free;
  sbResponseBody.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.