Fixes issue #457: incorrect HTTPS detection.

framework/yii/db/Connection.php

@@ -251,7 +251,7 @@ class Connection extends Component
 	 */
 	private $_schema;
 
-	
+
 	/**
 	 * Returns a value indicating whether the DB connection is established.
 	 * @return boolean whether the DB connection is established

framework/yii/web/Request.php

@@ -533,8 +533,8 @@ class Request extends \yii\base\Request
 	 */
 	public function getIsSecureConnection()
 	{
-		return isset($_SERVER['HTTPS']) && strcasecmp($_SERVER['HTTPS'], 'off')
+		return isset($_SERVER['HTTPS']) && ($_SERVER['HTTPS'] === 'on' || $_SERVER['HTTPS'] == 1)
-			|| isset($_SERVER['HTTP_X_FORWARDED_PROTO']) && $_SERVER['HTTP_X_FORWARDED_PROTO']==='https';
+			|| isset($_SERVER['HTTP_X_FORWARDED_PROTO']) && $_SERVER['HTTP_X_FORWARDED_PROTO'] === 'https';
 	}
 
 	/**