diff --git a/.tests/phpunit.xml b/.tests/phpunit.xml
index acdbf15..81a05b1 100644
--- a/.tests/phpunit.xml
+++ b/.tests/phpunit.xml
@@ -17,4 +17,7 @@
     <logging>
       <log type="coverage-text" target="php://stdout" showUncoveredFiles="false"/>
     </logging>
+    <php>
+        <server name='HTTP_HOST' value='http://127.0.0.1' />
+    </php>
 </phpunit>
diff --git a/.tests/tests/UtilsTest.php b/.tests/tests/UtilsTest.php
new file mode 100644
index 0000000..38eefd8
--- /dev/null
+++ b/.tests/tests/UtilsTest.php
@@ -0,0 +1,103 @@
+<?php
+use PHPUnit\Framework\TestCase;
+
+require_once(__DIR__ . "/../../helpers/utils.php");
+
+class UtilsTest extends TestCase {
+
+  public function testGetUploadMaxSize() {
+    $iniGetBytes = new ReflectionMethod('uUtils', 'iniGetBytes');
+    $iniGetBytes->setAccessible(true);
+
+    ini_set("memory_limit", "1G");
+    $result = $iniGetBytes->invoke(null, "memory_limit");
+    $this->assertEquals(1024 * 1024 * 1024, $result);
+
+    ini_set("memory_limit", 100 . "M");
+    $result = $iniGetBytes->invoke(null, "memory_limit");
+    $this->assertEquals(100 * 1024 * 1024, $result);
+
+    ini_set("memory_limit", 100 * 1024 . "K");
+    $result = $iniGetBytes->invoke(null, "memory_limit");
+    $this->assertEquals(100 * 1024 * 1024, $result);
+
+    ini_set("memory_limit", 100 * 1024 * 1024);
+    $result = $iniGetBytes->invoke(null, "memory_limit");
+    $this->assertEquals(100 * 1024 * 1024, $result);
+
+  }
+
+  public function testGetBaseUrlMain() {
+    if (!defined("ROOT_DIR")) {
+      define("ROOT_DIR", "/var/www/html/ulogger");
+    }
+
+    $_SERVER["HTTPS"] = "";
+    $_SERVER["HTTP_HOST"] = "www.example.com";
+    $_SERVER["SCRIPT_FILENAME"] = ROOT_DIR . "/index.php";
+    $_SERVER["PHP_SELF"] = "/index.php";
+    $result = uUtils::getBaseUrl();
+    $expected = "http://www.example.com/";
+    $this->assertEquals($expected, $result);
+  }
+
+  public function testGetBaseUrlScript() {
+    if (!defined("ROOT_DIR")) {
+      define("ROOT_DIR", "/var/www/html");
+    }
+
+    $_SERVER["HTTPS"] = "";
+    $_SERVER["HTTP_HOST"] = "www.example.com";
+    $_SERVER["SCRIPT_FILENAME"] = ROOT_DIR . "/utils/test.php";
+    $_SERVER["PHP_SELF"] = "/utils/test.php";
+    $result = uUtils::getBaseUrl();
+    $expected = "http://www.example.com/";
+    $this->assertEquals($expected, $result);
+  }
+
+  public function testGetBaseUrlSubfolder() {
+    if (!defined("ROOT_DIR")) {
+      define("ROOT_DIR", "/var/www/html");
+    }
+
+    $_SERVER["HTTPS"] = "";
+    $_SERVER["HTTP_HOST"] = "www.example.com";
+    $_SERVER["SCRIPT_FILENAME"] = ROOT_DIR . "/index.php";
+    $_SERVER["PHP_SELF"] = "/ulogger/index.php";
+    $result = uUtils::getBaseUrl();
+    $expected = "http://www.example.com/ulogger/";
+    $this->assertEquals($expected, $result);
+  }
+
+  public function testGetBaseUrlHttps() {
+    if (!defined("ROOT_DIR")) {
+      define("ROOT_DIR", "/var/www/html");
+    }
+
+    $_SERVER["HTTPS"] = "on";
+    $_SERVER["HTTP_HOST"] = "www.example.com";
+    $_SERVER["SCRIPT_FILENAME"] = ROOT_DIR . "/index.php";
+    $_SERVER["PHP_SELF"] = "/index.php";
+    $result = uUtils::getBaseUrl();
+    $expected = "https://www.example.com/";
+    $this->assertEquals($expected, $result);
+  }
+
+  public function testGetBaseUrlHttp() {
+    if (!defined("ROOT_DIR")) {
+      define("ROOT_DIR", "/var/www/html");
+    }
+
+    $_SERVER["HTTPS"] = "off";
+    $_SERVER["HTTP_HOST"] = "www.example.com";
+    $_SERVER["SCRIPT_FILENAME"] = ROOT_DIR . "/index.php";
+    $_SERVER["PHP_SELF"] = "/index.php";
+    $result = uUtils::getBaseUrl();
+    $expected = "http://www.example.com/";
+    $this->assertEquals($expected, $result);
+
+    unset($_SERVER["HTTPS"]);
+    $this->assertEquals($expected, $result);
+  }
+}
+?>
diff --git a/helpers/auth.php b/helpers/auth.php
index e8b49c5..2f6aea8 100644
--- a/helpers/auth.php
+++ b/helpers/auth.php
@@ -17,8 +17,10 @@
  * along with this program; if not, see <http://www.gnu.org/licenses/>.
  */
 
-  define('ROOT_DIR', dirname(__DIR__));
+  if (!defined('ROOT_DIR')) { define('ROOT_DIR', dirname(__DIR__)); }
   require_once(ROOT_DIR . "/helpers/user.php");
+  require_once(ROOT_DIR . "/helpers/utils.php");
+  if (!defined('BASE_URL')) { define('BASE_URL', uUtils::getBaseUrl()); }
 
  /**
   * Authentication
@@ -143,7 +145,7 @@
      * @param string $path URL path
      * @return void
      */
-    public function logOutWithRedirect($path = NULL) {
+    public function logOutWithRedirect($path = "") {
       $this->sessionEnd();
       $this->exitWithRedirect($path);
     }
@@ -174,14 +176,8 @@
      * @param string $path Redirect URL path
      * @return void
      */
-    public function exitWithRedirect($path = NULL) {
-      $ssl = (!isset($_SERVER['HTTPS']) || $_SERVER['HTTPS'] == "" || $_SERVER['HTTPS'] == "off") ? "http" : "https";
-      $url = $_SERVER['HTTP_HOST'];
-      if (is_null($path)) {
-        $path = dirname($_SERVER['SCRIPT_NAME']) . "/";
-      }
-      $url = str_replace("//", "/", $url . $path);
-      header("Location: $ssl://$url");
+    public function exitWithRedirect($path = "") {
+      header("Location: " . BASE_URL . $path);
       exit();
     }
   }
\ No newline at end of file
diff --git a/helpers/utils.php b/helpers/utils.php
index 3b28cec..82aabb4 100644
--- a/helpers/utils.php
+++ b/helpers/utils.php
@@ -108,6 +108,21 @@
       exit;
     }
 
+    public static function getBaseUrl() {
+      $proto = (!isset($_SERVER["HTTPS"]) || $_SERVER["HTTPS"] == "" || $_SERVER["HTTPS"] == "off") ? "http://" : "https://";
+      $host = isset($_SERVER["HTTP_HOST"]) ? $_SERVER["HTTP_HOST"] : "";
+      if (realpath($_SERVER["SCRIPT_FILENAME"])) {
+        $scriptPath = substr(dirname(realpath($_SERVER["SCRIPT_FILENAME"])), strlen(ROOT_DIR));
+      } else {
+        // for phpunit
+        $scriptPath = substr(dirname($_SERVER["SCRIPT_FILENAME"]), strlen(ROOT_DIR));
+      }
+      $self = dirname($_SERVER["PHP_SELF"]);
+      $path = str_replace("\\", "/", substr($self, 0, strlen($self) - strlen($scriptPath)));
+
+      return $proto . str_replace("//", "/", $host . $path . "/");
+    }
+
   }
 
 ?>
\ No newline at end of file
diff --git a/login.php b/login.php
index b56faca..6f2156a 100644
--- a/login.php
+++ b/login.php
@@ -39,7 +39,7 @@
     <div id="login">
       <div id="title"><?=  $lang["title"] ?></div>
       <div id="subtitle"><?=  $lang["private"] ?></div>
-      <form action="/" method="post">
+      <form action="<?= BASE_URL ?>" method="post">
       <?= $lang["username"] ?>:<br>
       <input type="text" name="user"><br>
       <?=  $lang["password"] ?>:<br>
@@ -48,7 +48,7 @@
       <input type="submit" value="<?= $lang["login"] ?>">
       <input type="hidden" name="action" value="auth">
       <?php if (!uConfig::$require_authentication): ?>
-        <div id="cancel"><a href="/"><?= $lang["cancel"] ?></a></div>
+        <div id="cancel"><a href="<?= BASE_URL ?>"><?= $lang["cancel"] ?></a></div>
       <?php endif; ?>
       </form>
       <div id="error"><?= (($auth_error) ? $lang["authfail"] : "") ?></div>
diff --git a/utils/logout.php b/utils/logout.php
index 534fdc9..c758fc3 100755
--- a/utils/logout.php
+++ b/utils/logout.php
@@ -20,6 +20,6 @@
 include_once(dirname(__DIR__) . "/helpers/auth.php");
 
 $auth = new uAuth();
-$auth->logOutWithRedirect(dirname(dirname($_SERVER['SCRIPT_NAME'])) . "/");
+$auth->logOutWithRedirect();
 
 ?>
\ No newline at end of file