diff --git a/examples/rs_change_type.php b/examples/rs_change_type.php
index c1d7b86f..8b3201fc 100644
--- a/examples/rs_change_type.php
+++ b/examples/rs_change_type.php
@@ -21,7 +21,12 @@
 // 参考文档：https://developer.qiniu.com/kodo/api/3710/chtype
 
 $key = "qiniu.mp4";
-$fileType = 1; // 0 表示标准存储；1 表示低频存储；2 表示归档存储；3 表示深度归档存储；4 表示归档直读存储；
+// 0 表示标准存储；
+// 1 表示低频存储；
+// 2 表示归档存储；
+// 3 表示深度归档存储；
+// 4 表示归档直读存储；
+$fileType = 1;
 
 list($ret, $err) = $bucketManager->changeType($bucket, $key, $fileType);
 if ($err != null) {
diff --git a/src/Qiniu/Storage/BucketManager.php b/src/Qiniu/Storage/BucketManager.php
index 29b4a363..bfca4fc1 100644
--- a/src/Qiniu/Storage/BucketManager.php
+++ b/src/Qiniu/Storage/BucketManager.php
@@ -7,6 +7,7 @@
 use Qiniu\Http\Error;
 use Qiniu\Http\Client;
 use Qiniu\Http\Proxy;
+use Qiniu\Http\Response;
 
 /**
  * 主要涉及了空间资源管理及批量操作接口的实现，具体的接口规格可以参考
@@ -830,7 +831,12 @@ public function fetch($url, $bucket, $key = null)
      * @param string $callbackbody 回调Body
      * @param string $callbackbodytype 回调Body内容类型,默认为"application/x-www-form-urlencoded"
      * @param string $callbackhost 回调时使用的Host
-     * @param int $file_type 存储文件类型 0:标准存储(默认),1:低频存储,2:归档存储,3:深度归档存储,4:归档直读存储
+     * @param int $file_type 存储文件类型
+     *   0:标准存储(默认)
+     *   1:低频存储
+     *   2:归档存储
+     *   3:深度归档存储
+     *   4:归档直读存储
      * @param bool $ignore_same_key 如果空间中已经存在同名文件则放弃本次抓取
      * @return array
      * @link  https://developer.qiniu.com/kodo/api/4097/asynch-fetch
@@ -943,7 +949,20 @@ public function batch($operations)
             $scheme = "https://";
         }
         $params = 'op=' . implode('&op=', $operations);
-        return $this->postV2($scheme . Config::RS_HOST . '/batch', $params);
+        $errResp = new Response(0, 0);
+        if (count($operations) <= 0) {
+            $errResp->error = 'empty operations';
+            return array(null, new Error($scheme . '/batch', $errResp));
+        }
+        $bucket = '';
+        foreach ($operations as $op) {
+            $segments = explode('/', $op);
+            if (count($segments) < 3) {
+                continue;
+            }
+            list($bucket,) = \Qiniu\decodeEntry($segments[2]);
+        }
+        return $this->rsPost($bucket, '/batch', $params);
     }
 
     /**
diff --git a/src/Qiniu/functions.php b/src/Qiniu/functions.php
index 5e0402ac..cc258d7e 100644
--- a/src/Qiniu/functions.php
+++ b/src/Qiniu/functions.php
@@ -140,6 +140,16 @@ function entry($bucket, $key = null)
         return base64_urlSafeEncode($en);
     }
 
+    function decodeEntry($entry)
+    {
+        $en = base64_urlSafeDecode($entry);
+        $en = explode(':', $en);
+        if (count($en) == 1) {
+            return array($en[0], null);
+        }
+        return array($en[0], $en[1]);
+    }
+
     /**
      * array 辅助方法，无值时不set
      *
diff --git a/tests/Qiniu/Tests/EntryTest.php b/tests/Qiniu/Tests/EntryTest.php
index ebed1875..73bfac4c 100644
--- a/tests/Qiniu/Tests/EntryTest.php
+++ b/tests/Qiniu/Tests/EntryTest.php
@@ -46,4 +46,43 @@ public function testKeyNeedReplaceSlashSymbol()
         $encodeEntryURI = Qiniu\entry($bucket, $key);
         $this->assertEquals('cWluaXVwaG90b3M6MDEydHM_YQ==', $encodeEntryURI);
     }
+    public function testDecodeEntry()
+    {
+        $entry = 'cWluaXVwaG90b3M6Z29nb3BoZXIuanBn';
+        list($bucket, $key) = Qiniu\decodeEntry($entry);
+        $this->assertEquals('qiniuphotos', $bucket);
+        $this->assertEquals('gogopher.jpg', $key);
+    }
+
+    public function testDecodeEntryWithEmptyKey()
+    {
+        $entry = 'cWluaXVwaG90b3M6';
+        list($bucket, $key) = Qiniu\decodeEntry($entry);
+        $this->assertEquals('qiniuphotos', $bucket);
+        $this->assertEquals('', $key);
+    }
+
+    public function testDecodeEntryWithNullKey()
+    {
+        $entry = 'cWluaXVwaG90b3M=';
+        list($bucket, $key) = Qiniu\decodeEntry($entry);
+        $this->assertEquals('qiniuphotos', $bucket);
+        $this->assertNull($key);
+    }
+
+    public function testDecodeEntryWithPlusSymbol()
+    {
+        $entry = 'cWluaXVwaG90b3M6MDEydHM-YQ==';
+        list($bucket, $key) = Qiniu\decodeEntry($entry);
+        $this->assertEquals('qiniuphotos', $bucket);
+        $this->assertEquals('012ts>a', $key);
+    }
+
+    public function testDecodeEntryWithSlashSymbol()
+    {
+        $entry = 'cWluaXVwaG90b3M6MDEydHM_YQ==';
+        list($bucket, $key) = Qiniu\decodeEntry($entry);
+        $this->assertEquals('qiniuphotos', $bucket);
+        $this->assertEquals('012ts?a', $key);
+    }
 }