Http协议访问DataSnap Rest 服务器

procedure TSC.DSAuthenticationManager1UserAuthenticate(Sender: TObject;
  const Protocol, Context, User, Password: string; var valid: Boolean;
  UserRoles: TStrings);
var
  sCheckCode : string;
begin
  valid := False;
  sCheckCode := CMBSrvIniSetting.SrvCnnCheckCode;
  if PassWord.Equals(sCheckCode) then
  begin
    valid := True;
  end;
end;

procedure TForm15.Button2Click(Sender: TObject);
var
  url, params, Text: string;
  code: Integer;
  http: TIDHttp;
begin
  http:= TIDHttp.Create(nil);
  http.Request.BasicAuthentication := True;
  http.request.password := ‘密码‘;
  params := Edit1.Text;

  url:= ‘http://192.168.10.182:8081/datasnap/rest/TSM/EchoString/‘;
  try
    text := http.Get(URL+TIdURI.ParamsEnCode(params));
    Edit2.Text := Text;
  except
    on E: Exception do
    begin

    end;
  end;
end;