allow tls as scheme in DSN string for predis library

Author: jeff1985

RedisConnectionFactory.php

@@ -116,8 +116,10 @@ private function createRedis()
      */
     private function parseDsn($dsn)
     {
-        if (false === strpos($dsn, 'redis:')) {
-            throw new \LogicException(sprintf('The given DSN "%s" is not supported. Must start with "redis:".', $dsn));
+        $unsupportedError = 'The given DSN "%s" is not supported. Must start with "redis:".';
+
+        if ((false === strpos($dsn, 'redis:')) and (false === strpos($dsn, 'tls:'))) {
+            throw new \LogicException(sprintf($unsupportedError, $dsn));
         }
 
         if (false === $config = parse_url($dsn)) {
@@ -131,7 +133,12 @@ private function parseDsn($dsn)
             $config = array_replace($queryConfig, $config);
         }
 
-        unset($config['query'], $config['scheme']);
+        //predis additionaly supports tls as scheme, but it must remain in the $config array
+        if ($config['vendor']!='predis') {
+            if ($config['scheme']!='redis') throw new \LogicException(sprintf($unsupportedError, $dsn));
+            unset($config['scheme']);
+        }
+        unset($config['query']);
 
         $config['lazy'] = empty($config['lazy']) ? false : true;
         $config['persisted'] = empty($config['persisted']) ? false : true;