simplesamlphp throwing error after integrating with an APP - php

Question

Anyone can help with this issue:
I have simplesamlphp instaled and tested successfully with my IdP and SP.
when I integrated the APP following the doc (step 6) https://simplesamlphp.org/docs/1.5/simplesamlphp-sp I started getting errors I will post bellow.
Here is my autoload.php:
require __DIR__.'/../vendor/autoload.php';
require_once('/var/simplesamlphp/lib/_autoload.php');
$as = new SimpleSAML_Auth_Simple ( 'default-sp' );
if ($as->isAuthenticated ()) {
//die ( 'ok' );
} else {
$param = array (
'ReturnTo' => 'http://10.128.240.181/'
);
$as->requireAuth ( $param );
}
$attributes = $as->getAttributes();
print_r($attributes);
$session = SimpleSAML_Session::getSessionFromRequest();
$session->cleanup();
Error output:
Feb 07 16:52:32 simplesamlphp WARNING [CL0a04f709] The class or interface 'SimpleSAML_Auth_Simple' is now using namespaces, please use 'SimpleSAML\Auth\Simple'.
PHP Notice: Undefined index: REQUEST_URI in /var/simplesamlphp/lib/SimpleSAML/Utils/HTTP.php on line 810
PHP Stack trace:
PHP 1. {main}() /var/www/Cachet/bootstrap/autoload.php:0
PHP 2. SimpleSAML\Auth\Simple->requireAuth() /var/www/Cachet/bootstrap/autoload.php:58
PHP 3. SimpleSAML\Auth\Simple->login() /var/simplesamlphp/lib/SimpleSAML/Auth/Simple.php:103
PHP 4. sspmod_saml_Auth_Source_SP->initLogin() /var/simplesamlphp/lib/SimpleSAML/Auth/Simple.php:161
PHP 5. sspmod_saml_Auth_Source_SP->authenticate() /var/simplesamlphp/lib/SimpleSAML/Auth/Source.php:193
PHP 6. sspmod_saml_Auth_Source_SP->startSSO() /var/simplesamlphp/modules/saml/lib/Auth/Source/SP.php:431
PHP 7. sspmod_saml_Auth_Source_SP->startSSO2() /var/simplesamlphp/modules/saml/lib/Auth/Source/SP.php:336
PHP 8. sspmod_saml_Auth_Source_SP->sendSAML2AuthnRequest() /var/simplesamlphp/modules/saml/lib/Auth/Source/SP.php:298
PHP 9. SAML2\HTTPRedirect->send() /var/simplesamlphp/modules/saml/lib/Auth/Source/SP.php:314
PHP 10. SAML2\Compat\Ssp\Container->redirect() /var/simplesamlphp/vendor/simplesamlphp/saml2/src/SAML2/HTTPRedirect.php:83
PHP 11. SimpleSAML_Utilities::redirectTrustedURL() /var/simplesamlphp/vendor/simplesamlphp/saml2/src/SAML2/Compat/Ssp/Container.php:52
PHP 12. SimpleSAML\Utils\HTTP::redirectTrustedURL() /var/simplesamlphp/lib/SimpleSAML/Utilities.php:276
PHP 13. SimpleSAML\Utils\HTTP::normalizeURL() /var/simplesamlphp/lib/SimpleSAML/Utils/HTTP.php:968
PHP 14. SimpleSAML\Utils\HTTP::getSelfURL() /var/simplesamlphp/lib/SimpleSAML/Utils/HTTP.php:889
****PHP Fatal error: Uncaught SimpleSAML_Error_UnserializableException: Unable to parse base url: http://localhost in /var/simplesamlphp/lib/SimpleSAML/Auth/Source.php:197****
Stack trace:
#0 /var/simplesamlphp/lib/SimpleSAML/Auth/Simple.php(161): SimpleSAML_Auth_Source->initLogin('http://10.128.2...', NULL, Array)
#1 /var/simplesamlphp/lib/SimpleSAML/Auth/Simple.php(103): SimpleSAML\Auth\Simple->login(Array)
#2 /var/www/Cachet/bootstrap/autoload.php(58): SimpleSAML\Auth\Simple->requireAuth(Array)
#3 {main}
thrown in /var/simplesamlphp/lib/SimpleSAML/Auth/Source.php on line 197
Anyone has an idea what could be the cause of this error ? I am a newbie in php and SAML,

Answer 1

I think there are two issues. The first one is:
Feb 07 16:52:32 simplesamlphp WARNING [CL0a04f709] The class or interface 'SimpleSAML_Auth_Simple' is now using namespaces, please use 'SimpleSAML\Auth\Simple'.
It seems you are following an old documentation and using a recent version of SimpleSAMLphp. You will have to use $as = new \SimpleSAML\Auth\Simple('default-sp'); instead of $as = new SimpleSAML_Auth_Simple ( 'default-sp' );
If you are using the latest stable version of SimpleSAMLphp, please follow https://simplesamlphp.org/docs/stable/simplesamlphp-sp
The second issue is
****PHP Fatal error: Uncaught SimpleSAML_Error_UnserializableException: Unable to parse base url: http://localhost in /var/simplesamlphp/lib/SimpleSAML/Auth/Source.php:197****
This is more related to the configuration (This is a wild guess). Can you provide more info on your web server (IIS/Apache/nginx)? I think IIS has some known issues: https://github.com/simplesamlphp/simplesamlphp/issues/540