Support Redis cache in redundant_attachments plugin

plugins/database_attachments/config.inc.php.dist

@@ -2,7 +2,7 @@
 
 // By default this plugin stores attachments in filesystem
 // and copies them into sql database.
-// You can change it to use 'memcache' or 'apc'.
+// You can change it to use 'memcache', 'redis' or 'apc'.
 // -----------------------------------------------------------
 // WARNING: Remember to set max_allowed_packet in database or
 //          config to match with expected max attachment size.

plugins/database_attachments/database_attachments.php

@@ -13,6 +13,8 @@
  * @author Ziba Scott <ziba@umich.edu>
  * @author Aleksander Machniak <alec@alec.pl>
  *
+ * Copyright (C) 2011-2018, The Roundcube Dev Team
+ *
  * This program is free software; you can redistribute it and/or modify
  * it under the terms of the GNU General Public License version 2
  * as published by the Free Software Foundation.

plugins/redundant_attachments/composer.json

@@ -3,7 +3,7 @@
     "type": "roundcube-plugin",
     "description": "This plugin provides a redundant storage for temporary uploaded attachment files. They are stored in both the database backend as well as on the local file system. It provides also memcache store as a fallback.",
     "license": "GPLv2",
-    "version": "1.1",
+    "version": "1.2",
     "authors": [
         {
             "name": "Aleksander Machniak",

plugins/redundant_attachments/config.inc.php.dist

@@ -1,14 +1,15 @@
 <?php
 
-// By default this plugin stores attachments in filesystem
-// and copies them into sql database.
-// In environments with replicated database it is possible
-// to use memcache as a fallback when write-master is unavailable.
-// ------------------------------------------------------------
-// WARNING: Remember to also set memcache_max_allowed_packet in
-//          config to match with expected max attachment size.
-// ------------------------------------------------------------
-$config['redundant_attachments_memcache'] = false;
+// By default this plugin stores attachments in filesystem and copies them into sql database.
+// In environments with replicated database it is possible to use memcache or redis
+// as a fallback when write-master is unavailable.
+// -------------------------------------------------------------------------------------
+// WARNING: Remember to also set memcache_max_allowed_packet or redis_max_allowed_packet
+//          in config to match with expected maximum attachment size.
+// -------------------------------------------------------------------------------------
+// This option can be set to 'memcache' or 'redis'.
+// Don't forget to set redis_*/memcache_* options in Roundcube config file.
+$config['redundant_attachments_fallback'] = false;
 
 // Attachment data expires after specified TTL time in seconds (max.2592000).
 // Default is 12 hours.

plugins/redundant_attachments/redundant_attachments.php

@@ -7,16 +7,16 @@
  * attachment files. They are stored in both the database backend
  * as well as on the local file system.
  *
- * It provides also memcache store as a fallback (see config file).
+ * It provides also memcache/redis store as a fallback (see config file).
  *
  * This plugin relies on the core filesystem_attachments plugin
  * and combines it with the functionality of the database_attachments plugin.
  *
  * @author Thomas Bruederli <roundcube@gmail.com>
  * @author Aleksander Machniak <machniak@kolabsys.com>
  *
- * Copyright (C) 2011, The Roundcube Dev Team
- * Copyright (C) 2011, Kolab Systems AG
+ * Copyright (C) 2011-2018, The Roundcube Dev Team
+ * Copyright (C) 2011-2018, Kolab Systems AG
  *
  * This program is free software; you can redistribute it and/or modify
  * it under the terms of the GNU General Public License version 2
@@ -46,7 +46,7 @@ class redundant_attachments extends filesystem_attachments
     // rcube_cache instance for SQL DB
     private $cache;
 
-    // rcube_cache instance for memcache
+    // rcube_cache instance for memcache/redis
     private $mem_cache;
 
     private $loaded;
@@ -66,20 +66,25 @@ private function _load_drivers()
         // load configuration
         $this->load_config();
 
-        $ttl    = 12 * 60 * 60; // 12 hours
-        $ttl    = $rcmail->config->get('redundant_attachments_cache_ttl', $ttl);
-        $prefix = self::PREFIX;
+        $ttl      = 12 * 60 * 60; // 12 hours
+        $ttl      = $rcmail->config->get('redundant_attachments_cache_ttl', $ttl);
+        $fallback = $rcmail->config->get('redundant_attachments_fallback');
+        $prefix   = self::PREFIX;
 
         if ($id = session_id()) {
             $prefix .= $id;
         }
 
+        if ($fallback === null) {
+            $fallback = $rcmail->config->get('redundant_attachments_memcache') ? 'memcache' : null; // BC
+        }
+
         // Init SQL cache (disable cache data serialization)
         $this->cache = $rcmail->get_cache($prefix, 'db', $ttl, false);
 
-        // Init memcache (fallback) cache
-        if ($rcmail->config->get('redundant_attachments_memcache')) {
-            $this->mem_cache = $rcmail->get_cache($prefix, 'memcache', $ttl, false);
+        // Init memcache/redis (fallback) cache
+        if ($fallback) {
+            $this->mem_cache = $rcmail->get_cache($prefix, $fallback, $ttl, false);
         }
 
         $this->loaded = true;