Fix URL building when cas_url setting have leading space

Fixes #1

CHANGELOG.md

@@ -4,6 +4,12 @@ All notable changes to this project will be documented in this file.
 The format is based on [Keep a Changelog](https://keepachangelog.com/en/1.0.0/),
 and this project adheres to [Semantic Versioning](https://semver.org/spec/v2.0.0.html).
 
+## Unreleased
+
+### Fixed
+
+- Fixed URL building when `cas_url` setting have leading space (#1)
+
 ## [0.4.1] - 2022-05-09
 
 ### Fixed

src/Controller/LoginController.php

@@ -52,7 +52,7 @@ public function loginAction ()
             $session->offsetSet('redirect_url', $redirectUrl);
         }
 
-        $casUrl = UriFactory::factory(sprintf('%s/login', $this->settings()->get('cas_url')));
+        $casUrl = UriFactory::factory(sprintf('%s/login', $this->getCasUrlSetting()));
         $query = [
             'service' => $this->getServiceUrl(),
         ];
@@ -115,7 +115,7 @@ public function validateAction()
 
     protected function serviceValidate($ticket)
     {
-        $serviceValidateUrl = $this->settings()->get('cas_url') . '/serviceValidate';
+        $serviceValidateUrl = $this->getCasUrlSetting() . '/serviceValidate';
         $httpClient = $this->httpClient;
         $httpClient->reset();
         $httpClient->setUri($serviceValidateUrl);
@@ -210,4 +210,9 @@ protected function getServiceUrl()
     {
         return $this->url()->fromRoute('cas/validate', [], ['force_canonical' => true]);
     }
+
+    protected function getCasUrlSetting()
+    {
+        return trim($this->settings()->get('cas_url'));
+    }
 }