hash = StringUtil.EMPTY;
        }

        if (!isFileSystemPath(targetUrl)) {
            return HtmlResponse.fromRedirectPathAsIs(DocumentUtil.encodeUrl(targetUrl + hash));
        }
        if (!fessConfig.isSearchFileProxyEnabled()) {
            return HtmlResponse.fromRedirectPathAsIs(targetUrl + hash);
        }
        final ViewHelper viewHelper = ComponentUtil.getViewHelper();
        try {

        fessLoginAssist.logout();
        userInfoHelper.deleteUserCodeFromCookie(request);
        if (StringUtil.isNotBlank(redirectUrl)) {
            return HtmlResponse.fromRedirectPathAsIs(redirectUrl);
        }
        return redirect(LoginAction.class);
    }

                    }
                    return null;
                }
            }

            return new ActionResponseCredential(() -> HtmlResponse.fromRedirectPathAsIs(getAuthUrl(request)));
        }).orElse(null);
    }

    protected String getAuthUrl(final HttpServletRequest request) {
        final String state = UuidUtil.create();

                request.getSession().setAttribute(SAML_STATE, UuidUtil.create());
                return new ActionResponseCredential(() -> HtmlResponse.fromRedirectPathAsIs(loginUrl));
            } catch (final Exception e) {
                throw new SsoLoginException("Invalid SAML redirect URL.", e);
            }

        }).orElseGet(() -> null);
    }

                    }
                }
                return null;
            }

            return new ActionResponseCredential(() -> HtmlResponse.fromRedirectPathAsIs(getAuthUrl(request)));
        }).orElse(null);
    }

    protected String getAuthUrl(final HttpServletRequest request) {
        final String state = UuidUtil.create();