Support TLS redis scheme via configuration

CHANGELOG.md

@@ -5,6 +5,7 @@ Yii Framework 2 redis extension Change Log
 ------------------------
 
 - Bug #247: `Cache::getValue()` now returns `false` in case of missing key (rhertogh)
+- Enh #249 Added support to set the redis scheme to tls. Add to configuration: `'scheme' => 'tls'` (tychovbh)
 
 
 2.0.17 January 11, 2022

README.md

@@ -85,3 +85,18 @@ return [
     ],
 ];
 ```
+
+**Configuring The Connection Scheme**
+
+By default, Redis will use the tcp scheme when connecting to your Redis server; however, you may use TLS / SSL encryption by specifying a scheme configuration option in your application configuration:
+```php
+return [
+    //....
+    'components' => [
+        'redis' => [
+            //....
+            'scheme' => 'tls'
+        ]
+    ]
+];
+```

composer.json

@@ -41,5 +41,10 @@
             "type": "composer",
             "url": "https://asset-packagist.org"
         }
-    ]
+    ],
+    "config": {
+        "allow-plugins": {
+            "yiisoft/yii2-composer": true
+        }
+    }
 }

src/Connection.php

@@ -259,6 +259,11 @@ class Connection extends Component
      * If [[unixSocket]] is specified, hostname and [[port]] will be ignored.
      */
     public $hostname = 'localhost';
+    /**
+     * @var string the connection scheme used for connecting to the redis server. Defaults to 'tcp'.
+     * @since 2.0.18
+     */
+    public $scheme = 'tcp';
     /**
      * @var string if the query gets redirected, use this as the temporary new hostname
      * @since 2.0.11
@@ -593,7 +598,7 @@ public function getConnectionString()
             return 'unix://' . $this->unixSocket;
         }
 
-        return 'tcp://' . ($this->redirectConnectionString ?: "$this->hostname:$this->port");
+        return $this->scheme . '://' . ($this->redirectConnectionString ?: "$this->hostname:$this->port");
     }
 
     /**