diff --git a/demo/download_token.php b/demo/download_token.php
deleted file mode 100644
index f282a247..00000000
--- a/demo/download_token.php
+++ /dev/null
@@ -1,27 +0,0 @@
-<?php
-require_once('../qiniu/utils.php');
-require_once('../qiniu/auth_digest.php');
-
-function dnToken($url, $expires = 3600)
-{
-
-    $e = 'e=' . (time() + $expires);
-
-    $qry = parse_url($url, PHP_URL_QUERY);
-    if ($qry) {
-        $url .= '&' . $e;
-    } else {
-        $url .= '?' . $e;
-    }
-
-    $sign = Qiniu_Sign(null, $url);
-
-    return $url . '&token=' . $sign;
-}
-
-$url = 'http://sslayer.qiniudn.com/dive-into-golang.pptx';
-echo dnToken($url);
-
-echo "\n";
-$url = 'http://sslayer.qiniudn.com/dive-into-golang.pptx?odconv/pdf';
-echo dnToken($url);
diff --git a/demo/get_policy.php b/demo/get_policy.php
new file mode 100644
index 00000000..2e9af434
--- /dev/null
+++ b/demo/get_policy.php
@@ -0,0 +1,16 @@
+<?php
+require_once('../qiniu/rs.php');
+require_once('../qiniu/auth_digest.php');
+
+$gpy = new Qiniu_RS_GetPolicy();
+
+$url = 'http://sslayer.qiniudn.com/dive-into-golang.pptx';
+echo $gpy->MakeRequest($url, null);
+
+echo "\n";
+$url = 'http://sslayer.qiniudn.com/dive-into-golang.pptx?odconv/pdf';
+echo $gpy->MakeRequest($url, null);
+
+echo "\n";
+$url = 'http://sslayer.qiniug.com/2.m3u8';
+echo $gpy->MakeRequest($url, null);
diff --git a/demo/up.php b/demo/up.php
index 3f52e257..1b7b2fab 100644
--- a/demo/up.php
+++ b/demo/up.php
@@ -5,7 +5,7 @@
 
 $bucket = 'rwxf';
 $key = 'up.php';
-$file = __FILE__;  //path to local file
+$file = <path_to_local_file>;
 
 
 $client = new Qiniu_MacHttpClient(null);
diff --git a/qiniu/io.php b/qiniu/io.php
index d77a03bf..d150938a 100644
--- a/qiniu/io.php
+++ b/qiniu/io.php
@@ -70,10 +70,7 @@ function Qiniu_PutFile($upToken, $key, $localFile, $putExtra) // => ($putRet, $e
 	}
 
 	$fields = array('token' => $upToken, 'file' => createFile($localFile, $putExtra->MimeType));
-	if ($key === null) {
-		$fname = '?';
-	} else {
-		$fname = $key;
+	if ($key !== null) {
 		$fields['key'] = $key;
 	}
 	if ($putExtra->CheckCrc) {