Gzip/redis cache driver

src/AppConfig.php

@@ -15,7 +15,6 @@
 use craft\helpers\App;
 use craft\log\MonologTarget;
 use craft\queue\Queue as CraftQueue;
-use yii\redis\Cache;
 use yii\web\DbSession;
 
 class AppConfig

src/Cache.php

@@ -0,0 +1,52 @@
+<?php
+
+namespace craft\cloud;
+
+class Cache extends \yii\redis\Cache
+{
+    /**
+     * gzip compression level, null to disable
+     */
+    public ?int $gzipLevel = 9;
+
+    public const GZIP_PREFIX = 'gz:';
+
+    public function __construct($config = [])
+    {
+        parent::__construct($config + [
+            'serializer' => [
+                [$this, 'serializeValue'],
+                [$this, 'unserializeValue'],
+            ],
+        ]);
+    }
+
+    private function serializeValue($value): string
+    {
+        $serialized = serialize($value);
+
+        if ($this->gzipLevel === null) {
+            return $serialized;
+        }
+
+        $compressed = gzencode($serialized, $this->gzipLevel);
+
+        return self::GZIP_PREFIX . $compressed;
+    }
+
+    private function unserializeValue($value): mixed
+    {
+        if (!is_string($value)) {
+            return $value;
+        }
+
+        $prefixLength = strlen(self::GZIP_PREFIX);
+        $isCompressed = strncmp($value, self::GZIP_PREFIX, $prefixLength) === 0;
+
+        $decompressed = $isCompressed
+            ? gzdecode(substr($value, $prefixLength))
+            : $value;
+
+        return unserialize($decompressed);
+    }
+}