缓存添加 PostgreSQL 支持

Plugin.php

@@ -105,7 +105,8 @@ public static function config(Typecho_Widget_Helper_Form $form)
             'redis' => _t('Redis'),
             'memcached' => _t('Memcached'),
             'mysql' => _t('MySQL'),
-            'sqlite' => _t('SQLite')
+            'sqlite' => _t('SQLite'),
+            'postgres' => _t('PostgreSQL')
         );
         $t = new Typecho_Widget_Helper_Form_Element_Radio(
             'cachetype',
@@ -128,7 +129,7 @@ public static function config(Typecho_Widget_Helper_Form $form)
             null,
             '6379',
             _t('缓存服务端口'),
-            _t('默认端口 memcache: 11211, Redis: 6379, Mysql: 3306')
+            _t('默认端口 memcache: 11211, Redis: 6379, Mysql: 3306, PostgreSQL: 5432')
         );
         $form->addInput($t);
 

driver/postgres.class.php

@@ -0,0 +1,52 @@
+<?php
+class MetingCache implements MetingCacheI
+{
+    private $db = null;
+    public function __construct($option)
+    {
+        $this->db = Typecho_Db::get();
+        $dbname = $this->db->getPrefix() . 'metingcache';
+        $this->install();
+        $this->db->query($this->db->delete('table.metingcache')->where('time <= ?', time()));
+    }
+    public function install()
+    {
+        $sql = '
+CREATE TABLE IF NOT EXISTS "' . $this->db->getPrefix() . 'metingcache' . '" (
+  "key" varchar(32) NOT NULL PRIMARY KEY,
+  "data" text,
+  "time" NUMERIC(20) DEFAULT NULL
+);';
+        $this->db->query($sql);
+    }
+    public function set($key, $value, $expire = 86400)
+    {
+        $this->db->query($this->db->insert('table.metingcache')->rows(array(
+            'key' => md5($key),
+            'data' => $value,
+            'time' => time() + $expire
+        )));
+    }
+    public function get($key)
+    {
+        $rs = $this->db->fetchRow($this->db->select('data')->from('table.metingcache')->where('key = ?', md5($key)));
+        if (count($rs) == 0) {
+            return false;
+        } else {
+            return $rs['data'];
+        }
+    }
+    public function flush()
+    {
+        return $this->db->query($this->db->delete('table.metingcache'));
+    }
+    public function check()
+    {
+        $number = uniqid();
+        $this->set('check', $number, 60);
+        $cache = $this->get('check');
+        if ($number != $cache) {
+            throw new Exception('Cache Test Fall!');
+        }
+    }
+}