diff --git a/v1/demo/head.php b/v1/demo/head.php
new file mode 100644
index 0000000..40b6ea0
--- /dev/null
+++ b/v1/demo/head.php
@@ -0,0 +1,21 @@
+<?php
+
+require_once("../ucloud/proxy.php");
+
+//存储空间名
+$bucket = "your bucket";
+//上传至存储空间后的文件名称(请不要和API公私钥混淆)
+$key    = "your key";
+
+
+list($header, $data, $err) = UCloud_Head($bucket, $key);
+if ($err) {
+	echo "error: " . $err->ErrMsg . "\n";
+	echo "code: " . $err->Code . "\n";
+	exit;
+}else{
+	echo "code: " . 200 ."\n";
+}
+
+print_r($header);
+echo "head $bucket/$key success\n";
diff --git a/v1/ucloud/http.php b/v1/ucloud/http.php
index 2763c93..c5353d6 100644
--- a/v1/ucloud/http.php
+++ b/v1/ucloud/http.php
@@ -4,8 +4,8 @@ require_once("conf.php");
 require_once("utils.php");
 require_once("digest.php");
 
+$CURL_TIMEOUT=30;
 // --------------------------------------------------------------------------------
-
 class HTTP_Request
 {
     public $URL;
@@ -129,13 +129,16 @@ function UCloud_Client_Do($req)
         CURLOPT_TIMEOUT => $req->Timeout,
         CURLOPT_CONNECTTIMEOUT => $req->Timeout
     );
-
-    if($req->EncodedQuery() !== ""){
+    if($req->METHOD =="HEAD"){
+	$options[CURLOPT_NOBODY]=true;
+    }
+     if($req->EncodedQuery() !== ""){
         $options[CURLOPT_URL] = $url['host'] . "/" . $url['path'] . "?" . $req->EncodedQuery();
     }else{
         $options[CURLOPT_URL] = $url['host'] . "/" . $url['path'];
     }
 
+
     $httpHeader = $req->Header;
     if (!empty($httpHeader))
     {
@@ -151,7 +154,9 @@ function UCloud_Client_Do($req)
     } else {
         $options[CURLOPT_POSTFIELDS] = "";
     }
+
     curl_setopt_array($ch, $options);
+
     $result = curl_exec($ch);
     $ret = curl_errno($ch);
     if ($ret !== 0) {
@@ -159,6 +164,7 @@ function UCloud_Client_Do($req)
         curl_close($ch);
         return array(null, $err);
     }
+
     $code = curl_getinfo($ch, CURLINFO_HTTP_CODE);
     $contentType = curl_getinfo($ch, CURLINFO_CONTENT_TYPE);
     curl_close($ch);
@@ -258,6 +264,7 @@ function UCloud_Client_Ret($resp)
     }else{
          $data['ETag'] = UCloud_Header_Get($resp->Header, 'Etag');
     }    
+
     if (floor($code/100) == 2) {
         return array($data, null);
     }
@@ -274,6 +281,33 @@ function UCloud_Client_Call($self, $req, $type = HEAD_FIELD_CHECK)
     return UCloud_Client_Ret($resp);
 }
 
+//@results: ($header,$data, $error)
+function UCloud_Client_Call_ReHeader($self, $req, $type = HEAD_FIELD_CHECK)
+{
+    list($resp, $err) = $self->RoundTrip($req, $type);
+    if ($err !== null) {
+        return array(null, null, $err);
+    }
+
+    $code = $resp->StatusCode;
+    $data = null;
+    if ($code >= 200 && $code <= 299) {
+        if ($resp->ContentLength !== 0 && UCloud_Header_Get($resp->Header, 'Content-Type') == 'application/json') {
+            $data = json_decode($resp->Body, true);
+            if ($data === null) {
+                $err = new UCloud_Error($code, 0, "");
+                return array($resp->Header, null, $err);
+            }
+        }
+    }
+
+    if (floor($code/100) == 2) {
+        return array($resp->Header, $data, null);
+    }
+ 
+    return array($resp->Header, $data, UCloud_ResponseError($resp));
+}
+
 //@results: $error
 function UCloud_Client_CallNoRet($self, $req, $type = HEAD_FIELD_CHECK)
 {
diff --git a/v1/ucloud/proxy.php b/v1/ucloud/proxy.php
index b0b4e2f..645d8c1 100644
--- a/v1/ucloud/proxy.php
+++ b/v1/ucloud/proxy.php
@@ -1,361 +1,382 @@
-<?php
-
-require_once("conf.php");
-require_once("http.php");
-require_once("utils.php");
-require_once("digest.php");
-
-
-//------------------------------普通上传------------------------------
-function UCloud_PutFile($bucket, $key, $file)
-{
-    $action_type = ActionType::PUTFILE;
-    $err = CheckConfig(ActionType::PUTFILE);
-    if ($err != null) {
-        return array(null, $err);
-    }
-
-    $f = @fopen($file, "r");
-    if (!$f) return array(null, new UCloud_Error(-1, -1, "open $file error"));
-
-    global $UCLOUD_PROXY_SUFFIX;
-    $host = $bucket . $UCLOUD_PROXY_SUFFIX;
-    $path = $key;
-    $content  = @fread($f, filesize($file));
-    list($mimetype, $err) = GetFileMimeType($file);
-    if ($err) {
-        fclose($f);
-        return array("", $err);
-    }
-    $req = new HTTP_Request('PUT', array('host'=>$host, 'path'=>$path), $content, $bucket, $key, $action_type);
-    $req->Header['Expect'] = '';
-    $req->Header['Content-Type'] = $mimetype;
-
-    $client = new UCloud_AuthHttpClient(null, $mimetype);
-    list($data, $err) = UCloud_Client_Call($client, $req);
-    fclose($f);
-    return array($data, $err);
-}
-
-//------------------------------表单上传------------------------------
-function UCloud_MultipartForm($bucket, $key, $file)
-{
-    $action_type = ActionType::POSTFILE;
-    $err = CheckConfig(ActionType::POSTFILE);
-    if ($err != null) {
-        return array(null, $err);
-    }
-
-    $f = @fopen($file, "r");
-    if (!$f) return array(null, new UCloud_Error(-1, -1, "open $file error"));
-
-    global $UCLOUD_PROXY_SUFFIX;
-    $host = $bucket . $UCLOUD_PROXY_SUFFIX;
-    $path = "";
-    $fsize = filesize($file);
-    $content = "";
-    if ($fsize != 0) {
-        $content = @fread($f, filesize($file));
-        if ($content == FALSE) {
-            fclose($f);
-            return array(null, new UCloud_Error(0, -1, "read file error"));
-        }
-    }
-    list($mimetype, $err) = GetFileMimeType($file);
-    if ($err) {
-        fclose($f);
-        return array("", $err);
-    }
-
-    $req = new HTTP_Request('POST', array('host'=>$host, 'path'=>$path), $content, $bucket, $key, $action_type);
-    $req->Header['Expect'] = '';
-    $token = UCloud_SignRequest(null, $req, $mimetype);
-
-    $fields = array('Authorization'=>$token, 'FileName' => $key);
-    $files  = array('files'=>array('file', $file, $content, $mimetype));
-
-    $client = new UCloud_AuthHttpClient(null, NO_AUTH_CHECK);
-    list($data, $err) = UCloud_Client_CallWithMultipartForm($client, $req, $fields, $files);
-    fclose($f);
-    return array($data, $err);
-}
-
-//------------------------------分片上传------------------------------
-function UCloud_MInit($bucket, $key)
-{
-
-    $err = CheckConfig(ActionType::MINIT);
-    if ($err != null) {
-        return array(null, $err);
-    }
-
-    global $UCLOUD_PROXY_SUFFIX;
-    $host = $bucket . $UCLOUD_PROXY_SUFFIX;
-    $path = $key;
-    $querys = array(
-        "uploads" => ""
-    );
-    $req = new HTTP_Request('POST', array('host'=>$host, 'path'=>$path, 'query'=>$querys), null, $bucket, $key);
-    $req->Header['Content-Type'] = 'application/x-www-form-urlencoded';
-
-    $client = new UCloud_AuthHttpClient(null);
-    return UCloud_Client_Call($client, $req);
-}
-
-//@results: (tagList, err)
-function UCloud_MUpload($bucket, $key, $file, $uploadId, $blkSize, $partNumber=0)
-{
-
-    $err = CheckConfig(ActionType::MUPLOAD);
-    if ($err != null) {
-        return array(null, $err);
-    }
-
-    $f = @fopen($file, "r");
-    if (!$f) return array(null, new UCloud_Error(-1, -1, "open $file error"));
-
-    global $UCLOUD_PROXY_SUFFIX;
-
-    $etagList = array();
-    list($mimetype, $err) = GetFileMimeType($file);
-    if ($err) {
-        fclose($f);
-        return array("", $err);
-    }
-    $client   = new UCloud_AuthHttpClient(null);
-    for(;;) {
-        $host = $bucket . $UCLOUD_PROXY_SUFFIX;
-        $path = $key;
-        if (@fseek($f, $blkSize*$partNumber, SEEK_SET) < 0) {
-            fclose($f);
-            return array(null, new UCloud_Error(0, -1, "fseek error"));
-        }
-        $content = @fread($f, $blkSize);
-        if ($content == FALSE) {
-            if (feof($f)) break;
-            fclose($f);
-            return array(null, new UCloud_Error(0, -1, "read file error"));
-        }
-
-        $querys = array(
-            "uploadId" => $uploadId,
-            "partNumber" => $partNumber
-        );
-        $req = new HTTP_Request('PUT', array('host'=>$host, 'path'=>$path, 'query'=>$querys), $content, $bucket, $key);
-        $req->Header['Content-Type'] = $mimetype;
-        $req->Header['Expect'] = '';
-        list($data, $err) = UCloud_Client_Call($client, $req);
-        if ($err) {
-            fclose($f);
-            return array(null, $err);
-        }
-        $etag = @$data['ETag'];
-        $part = @$data['PartNumber'];
-        if ($part != $partNumber) {
-            fclose($f);
-            return array(null, new UCloud_Error(0, -1, "unmatch partnumber"));
-        }
-        $etagList[] = $etag;
-        $partNumber += 1;
-    }
-    fclose($f);
-    return array($etagList, null);
-}
-
-function UCloud_MFinish($bucket, $key, $uploadId, $etagList, $newKey = '')
-{
-
-    $err = CheckConfig(ActionType::MFINISH);
-    if ($err != null) {
-        return array(null, $err);
-    }
-
-    global $UCLOUD_PROXY_SUFFIX;
-    $host = $bucket . $UCLOUD_PROXY_SUFFIX;
-    $path = $key;
-    $querys = array(
-        'uploadId' => $uploadId,
-        'newKey' => $newKey,
-    );
-
-    $body = @implode(',', $etagList);
-    $req = new HTTP_Request('POST', array('host'=>$host, 'path'=>$path, 'query'=>$querys), $body, $bucket, $key);
-    $req->Header['Content-Type'] = 'text/plain';
-
-    $client = new UCloud_AuthHttpClient(null);
-    return UCloud_Client_Call($client, $req);
-}
-
-function UCloud_MCancel($bucket, $key, $uploadId)
-{
-
-    $err = CheckConfig(ActionType::MCANCEL);
-    if ($err != null) {
-        return array(null, $err);
-    }
-
-    global $UCLOUD_PROXY_SUFFIX;
-    $host = $bucket . $UCLOUD_PROXY_SUFFIX;
-    $path = $key;
-    $querys = array(
-        'uploadId' => $uploadId
-    );
-
-    $req = new HTTP_Request('DELETE', array('host'=>$host, 'path'=>$path, 'query'=>$querys), null, $bucket, $key);
-    $req->Header['Content-Type'] = 'application/x-www-form-urlencoded';
-
-    $client = new UCloud_AuthHttpClient(null);
-    return UCloud_Client_Call($client, $req);
-}
-
-//------------------------------秒传------------------------------
-function UCloud_UploadHit($bucket, $key, $file)
-{
-
-    $err = CheckConfig(ActionType::UPLOADHIT);
-    if ($err != null) {
-        return array(null, $err);
-    }
-
-    $f = @fopen($file, "r");
-    if (!$f) return array(null, new UCloud_Error(-1, -1, "open $file error"));
-
-    $content = "";
-    $fileSize = filesize($file);
-    if ($fileSize != 0) {
-        $content  = @fread($f, $fileSize);
-        if ($content == FALSE) {
-            fclose($f);
-            return array(null, new UCloud_Error(0, -1, "read file error"));
-        }
-    }
-    list($fileHash, $err) = UCloud_FileHash($file);
-    if ($err) {
-        fclose($f);
-        return array(null, $err);
-    }
-    fclose($f);
-
-    global $UCLOUD_PROXY_SUFFIX;
-    $host = $bucket . $UCLOUD_PROXY_SUFFIX;
-    $path = "uploadhit";
-    $querys = array(
-        'Hash' => $fileHash,
-        'FileName' => $key,
-        'FileSize' => $fileSize
-    );
-
-    $req = new HTTP_Request('POST', array('host'=>$host, 'path'=>$path, 'query'=>$querys), null, $bucket, $key);
-    $req->Header['Content-Type'] = 'application/x-www-form-urlencoded';
-
-    $client = new UCloud_AuthHttpClient(null);
-    return UCloud_Client_Call($client, $req);
-}
-
-//------------------------------删除文件------------------------------
-function UCloud_Delete($bucket, $key)
-{
-
-    $err = CheckConfig(ActionType::DELETE);
-    if ($err != null) {
-        return array(null, $err);
-    }
-
-    global $UCLOUD_PROXY_SUFFIX;
-    $host = $bucket . $UCLOUD_PROXY_SUFFIX;
-    $path = "$key";
-
-    $req = new HTTP_Request('DELETE', array('host'=>$host, 'path'=>$path), null, $bucket, $key);
-    $req->Header['Content-Type'] = 'application/x-www-form-urlencoded';
-
-    $client = new UCloud_AuthHttpClient(null);
-    return UCloud_Client_Call($client, $req);
-}
-
-//------------------------------追加上传------------------------------
-function UCloud_AppendFile($bucket, $key, $file, $position)
-{
-    $action_type = ActionType::APPENDFILE;
-    $err = CheckConfig(ActionType::APPENDFILE);
-    if ($err != null) {
-        return array(null, $err);
-    }
-
-    $f = @fopen($file, "r");
-    if (!$f) return array(null, new UCloud_Error(-1, -1, "open $file error"));
-
-    global $UCLOUD_PROXY_SUFFIX;
-    $host = $bucket . $UCLOUD_PROXY_SUFFIX;
-    $key = $key . "?append&position=" . $position;
-    $path = $key;
-    $content  = @fread($f, filesize($file));
-    list($mimetype, $err) = GetFileMimeType($file);
-    if ($err) {
-        fclose($f);
-        return array("", $err);
-    }
-    $req = new HTTP_Request('PUT', array('host'=>$host, 'path'=>$path), $content, $bucket, $key, $action_type);
-    $req->Header['Expect'] = '';
-    $req->Header['Content-Type'] = $mimetype;
-
-    $client = new UCloud_AuthHttpClient(null, $mimetype);
-    list($data, $err) = UCloud_Client_Call($client, $req);
-    fclose($f);
-    return array($data, $err);
-}
-
-//------------------------------列表目录------------------------------
-function UCloud_ListObjects($bucket, $path_prefix, $marker, $count, $delimiter)
-{
-    $action_type = ActionType::LISTOBJECTS;
-    $err = CheckConfig(ActionType::LISTOBJECTS);
-    if ($err != null) {
-        return array(null, $err);
-    }
-
-    global $UCLOUD_PROXY_SUFFIX;
-    $host = $bucket . $UCLOUD_PROXY_SUFFIX;
-    $path = "?listobjects&prefix=" . $path_prefix ."&marker=". $marker . "&max-keys=" . $count ."&delimiter=" .$delimiter;
-
-    $req = new HTTP_Request('GET', array('host'=>$host, 'path'=>$path), null, $bucket, null, $action_type);
-    $req->Header['Content-Type'] = 'application/x-www-form-urlencoded';
-
-    $client = new UCloud_AuthHttpClient(null);
-    list($data, $err) = UCloud_Client_Call($client, $req);
-    return array($data, $err);
-}
-
-//------------------------------生成公有文件Url------------------------------
-// @results: $url
-function UCloud_MakePublicUrl($bucket, $key)
-{
-    global $UCLOUD_PROXY_SUFFIX;
-    return $bucket . $UCLOUD_PROXY_SUFFIX . "/" . rawurlencode($key);
-}
-//------------------------------生成私有文件Url------------------------------
-// @results: $url
-function UCloud_MakePrivateUrl($bucket, $key, $expires = 0)
-{
-
-    $err = CheckConfig(ActionType::GETFILE);
-    if ($err != null) {
-        return array(null, $err);
-    }
-
-    global $UCLOUD_PUBLIC_KEY;
-
-    $public_url = UCloud_MakePublicUrl($bucket, $key);
-    $req = new HTTP_Request('GET', array('path'=>$public_url), null, $bucket, $key);
-    if ($expires > 0) {
-        $req->Header['Expires'] = $expires;
-    }
-
-    $client = new UCloud_AuthHttpClient(null);
-    $temp = $client->Auth->SignRequest($req, null, QUERY_STRING_CHECK);
-    $signature = substr($temp, -28, 28);
-    $url = $public_url . "?UCloudPublicKey=" . rawurlencode($UCLOUD_PUBLIC_KEY) . "&Signature=" . rawurlencode($signature);
-    if ('' != $expires) {
-        $url .= "&Expires=" . rawurlencode($expires);
-    }
-    return $url;
-}
+<?php
+
+require_once("conf.php");
+require_once("http.php");
+require_once("utils.php");
+require_once("digest.php");
+
+
+//------------------------------普通上传------------------------------
+function UCloud_PutFile($bucket, $key, $file)
+{
+    $action_type = ActionType::PUTFILE;
+    $err = CheckConfig(ActionType::PUTFILE);
+    if ($err != null) {
+        return array(null, $err);
+    }
+
+    $f = @fopen($file, "r");
+    if (!$f) return array(null, new UCloud_Error(-1, -1, "open $file error"));
+
+    global $UCLOUD_PROXY_SUFFIX;
+    $host = $bucket . $UCLOUD_PROXY_SUFFIX;
+    $path = $key;
+    $content  = @fread($f, filesize($file));
+    list($mimetype, $err) = GetFileMimeType($file);
+    if ($err) {
+        fclose($f);
+        return array("", $err);
+    }
+    $req = new HTTP_Request('PUT', array('host'=>$host, 'path'=>$path), $content, $bucket, $key, $action_type);
+    $req->Header['Expect'] = '';
+    $req->Header['Content-Type'] = $mimetype;
+
+    $client = new UCloud_AuthHttpClient(null, $mimetype);
+    list($data, $err) = UCloud_Client_Call($client, $req);
+    fclose($f);
+    return array($data, $err);
+}
+
+//------------------------------表单上传------------------------------
+function UCloud_MultipartForm($bucket, $key, $file)
+{
+    $action_type = ActionType::POSTFILE;
+    $err = CheckConfig(ActionType::POSTFILE);
+    if ($err != null) {
+        return array(null, $err);
+    }
+
+    $f = @fopen($file, "r");
+    if (!$f) return array(null, new UCloud_Error(-1, -1, "open $file error"));
+
+    global $UCLOUD_PROXY_SUFFIX;
+    $host = $bucket . $UCLOUD_PROXY_SUFFIX;
+    $path = "";
+    $fsize = filesize($file);
+    $content = "";
+    if ($fsize != 0) {
+        $content = @fread($f, filesize($file));
+        if ($content == FALSE) {
+            fclose($f);
+            return array(null, new UCloud_Error(0, -1, "read file error"));
+        }
+    }
+    list($mimetype, $err) = GetFileMimeType($file);
+    if ($err) {
+        fclose($f);
+        return array("", $err);
+    }
+
+    $req = new HTTP_Request('POST', array('host'=>$host, 'path'=>$path), $content, $bucket, $key, $action_type);
+    $req->Header['Expect'] = '';
+    $token = UCloud_SignRequest(null, $req, $mimetype);
+
+    $fields = array('Authorization'=>$token, 'FileName' => $key);
+    $files  = array('files'=>array('file', $file, $content, $mimetype));
+
+    $client = new UCloud_AuthHttpClient(null, NO_AUTH_CHECK);
+    list($data, $err) = UCloud_Client_CallWithMultipartForm($client, $req, $fields, $files);
+    fclose($f);
+    return array($data, $err);
+}
+
+//------------------------------分片上传------------------------------
+function UCloud_MInit($bucket, $key)
+{
+
+    $err = CheckConfig(ActionType::MINIT);
+    if ($err != null) {
+        return array(null, $err);
+    }
+
+    global $UCLOUD_PROXY_SUFFIX;
+    $host = $bucket . $UCLOUD_PROXY_SUFFIX;
+    $path = $key;
+    $querys = array(
+        "uploads" => ""
+    );
+    $req = new HTTP_Request('POST', array('host'=>$host, 'path'=>$path, 'query'=>$querys), null, $bucket, $key);
+    $req->Header['Content-Type'] = 'application/x-www-form-urlencoded';
+
+    $client = new UCloud_AuthHttpClient(null);
+    return UCloud_Client_Call($client, $req);
+}
+
+//@results: (tagList, err)
+function UCloud_MUpload($bucket, $key, $file, $uploadId, $blkSize, $partNumber=0)
+{
+
+    $err = CheckConfig(ActionType::MUPLOAD);
+    if ($err != null) {
+        return array(null, $err);
+    }
+
+    $f = @fopen($file, "r");
+    if (!$f) return array(null, new UCloud_Error(-1, -1, "open $file error"));
+
+    global $UCLOUD_PROXY_SUFFIX;
+
+    $etagList = array();
+    list($mimetype, $err) = GetFileMimeType($file);
+    if ($err) {
+        fclose($f);
+        return array("", $err);
+    }
+    $client   = new UCloud_AuthHttpClient(null);
+    for(;;) {
+        $host = $bucket . $UCLOUD_PROXY_SUFFIX;
+        $path = $key;
+        if (@fseek($f, $blkSize*$partNumber, SEEK_SET) < 0) {
+            fclose($f);
+            return array(null, new UCloud_Error(0, -1, "fseek error"));
+        }
+        $content = @fread($f, $blkSize);
+        if ($content == FALSE) {
+            if (feof($f)) break;
+            fclose($f);
+            return array(null, new UCloud_Error(0, -1, "read file error"));
+        }
+
+        $querys = array(
+            "uploadId" => $uploadId,
+            "partNumber" => $partNumber
+        );
+        $req = new HTTP_Request('PUT', array('host'=>$host, 'path'=>$path, 'query'=>$querys), $content, $bucket, $key);
+        $req->Header['Content-Type'] = $mimetype;
+        $req->Header['Expect'] = '';
+        list($data, $err) = UCloud_Client_Call($client, $req);
+        if ($err) {
+            fclose($f);
+            return array(null, $err);
+        }
+        $etag = @$data['ETag'];
+        $part = @$data['PartNumber'];
+        if ($part != $partNumber) {
+            fclose($f);
+            return array(null, new UCloud_Error(0, -1, "unmatch partnumber"));
+        }
+        $etagList[] = $etag;
+        $partNumber += 1;
+    }
+    fclose($f);
+    return array($etagList, null);
+}
+
+function UCloud_MFinish($bucket, $key, $uploadId, $etagList, $newKey = '')
+{
+
+    $err = CheckConfig(ActionType::MFINISH);
+    if ($err != null) {
+        return array(null, $err);
+    }
+
+    global $UCLOUD_PROXY_SUFFIX;
+    $host = $bucket . $UCLOUD_PROXY_SUFFIX;
+    $path = $key;
+    $querys = array(
+        'uploadId' => $uploadId,
+        'newKey' => $newKey,
+    );
+
+    $body = @implode(',', $etagList);
+    $req = new HTTP_Request('POST', array('host'=>$host, 'path'=>$path, 'query'=>$querys), $body, $bucket, $key);
+    $req->Header['Content-Type'] = 'text/plain';
+
+    $client = new UCloud_AuthHttpClient(null);
+    return UCloud_Client_Call($client, $req);
+}
+
+function UCloud_MCancel($bucket, $key, $uploadId)
+{
+
+    $err = CheckConfig(ActionType::MCANCEL);
+    if ($err != null) {
+        return array(null, $err);
+    }
+
+    global $UCLOUD_PROXY_SUFFIX;
+    $host = $bucket . $UCLOUD_PROXY_SUFFIX;
+    $path = $key;
+    $querys = array(
+        'uploadId' => $uploadId
+    );
+
+    $req = new HTTP_Request('DELETE', array('host'=>$host, 'path'=>$path, 'query'=>$querys), null, $bucket, $key);
+    $req->Header['Content-Type'] = 'application/x-www-form-urlencoded';
+
+    $client = new UCloud_AuthHttpClient(null);
+    return UCloud_Client_Call($client, $req);
+}
+
+//------------------------------秒传------------------------------
+function UCloud_UploadHit($bucket, $key, $file)
+{
+
+    $err = CheckConfig(ActionType::UPLOADHIT);
+    if ($err != null) {
+        return array(null, $err);
+    }
+
+    $f = @fopen($file, "r");
+    if (!$f) return array(null, new UCloud_Error(-1, -1, "open $file error"));
+
+    $content = "";
+    $fileSize = filesize($file);
+    if ($fileSize != 0) {
+        $content  = @fread($f, $fileSize);
+        if ($content == FALSE) {
+            fclose($f);
+            return array(null, new UCloud_Error(0, -1, "read file error"));
+        }
+    }
+    list($fileHash, $err) = UCloud_FileHash($file);
+    if ($err) {
+        fclose($f);
+        return array(null, $err);
+    }
+    fclose($f);
+
+    global $UCLOUD_PROXY_SUFFIX;
+    $host = $bucket . $UCLOUD_PROXY_SUFFIX;
+    $path = "uploadhit";
+    $querys = array(
+        'Hash' => $fileHash,
+        'FileName' => $key,
+        'FileSize' => $fileSize
+    );
+
+    $req = new HTTP_Request('POST', array('host'=>$host, 'path'=>$path, 'query'=>$querys), null, $bucket, $key);
+    $req->Header['Content-Type'] = 'application/x-www-form-urlencoded';
+
+    $client = new UCloud_AuthHttpClient(null);
+    return UCloud_Client_Call($client, $req);
+}
+
+//------------------------------删除文件------------------------------
+function UCloud_Delete($bucket, $key)
+{
+
+    $err = CheckConfig(ActionType::DELETE);
+    if ($err != null) {
+        return array(null, $err);
+    }
+
+    global $UCLOUD_PROXY_SUFFIX;
+    $host = $bucket . $UCLOUD_PROXY_SUFFIX;
+    $path = "$key";
+
+    $req = new HTTP_Request('DELETE', array('host'=>$host, 'path'=>$path), null, $bucket, $key);
+    $req->Header['Content-Type'] = 'application/x-www-form-urlencoded';
+
+    $client = new UCloud_AuthHttpClient(null);
+    return UCloud_Client_Call($client, $req);
+}
+
+//------------------------------Head文件------------------------------
+function UCloud_Head($bucket, $key)
+{
+
+    $err = CheckConfig(ActionType::HEAD);
+    if ($err != null) {
+        return array(null, $err);
+    }
+
+    global $UCLOUD_PROXY_SUFFIX;
+    $host = $bucket . $UCLOUD_PROXY_SUFFIX;
+    $path = "$key";
+
+    $req = new HTTP_Request('HEAD', array('host'=>$host, 'path'=>$path), null, $bucket, $key);
+    $req->Header['Content-Type'] = 'application/x-www-form-urlencoded';
+
+    $client = new UCloud_AuthHttpClient(null);
+    return UCloud_Client_Call_ReHeader($client, $req);
+}
+
+
+//------------------------------追加上传------------------------------
+function UCloud_AppendFile($bucket, $key, $file, $position)
+{
+    $action_type = ActionType::APPENDFILE;
+    $err = CheckConfig(ActionType::APPENDFILE);
+    if ($err != null) {
+        return array(null, $err);
+    }
+
+    $f = @fopen($file, "r");
+    if (!$f) return array(null, new UCloud_Error(-1, -1, "open $file error"));
+
+    global $UCLOUD_PROXY_SUFFIX;
+    $host = $bucket . $UCLOUD_PROXY_SUFFIX;
+    $key = $key . "?append&position=" . $position;
+    $path = $key;
+    $content  = @fread($f, filesize($file));
+    list($mimetype, $err) = GetFileMimeType($file);
+    if ($err) {
+        fclose($f);
+        return array("", $err);
+    }
+    $req = new HTTP_Request('PUT', array('host'=>$host, 'path'=>$path), $content, $bucket, $key, $action_type);
+    $req->Header['Expect'] = '';
+    $req->Header['Content-Type'] = $mimetype;
+
+    $client = new UCloud_AuthHttpClient(null, $mimetype);
+    list($data, $err) = UCloud_Client_Call($client, $req);
+    fclose($f);
+    return array($data, $err);
+}
+
+//------------------------------列表目录------------------------------
+function UCloud_ListObjects($bucket, $path_prefix, $marker, $count, $delimiter)
+{
+    $action_type = ActionType::LISTOBJECTS;
+    $err = CheckConfig(ActionType::LISTOBJECTS);
+    if ($err != null) {
+        return array(null, $err);
+    }
+
+    global $UCLOUD_PROXY_SUFFIX;
+    $host = $bucket . $UCLOUD_PROXY_SUFFIX;
+    $path = "?listobjects&prefix=" . $path_prefix ."&marker=". $marker . "&max-keys=" . $count ."&delimiter=" .$delimiter;
+
+    $req = new HTTP_Request('GET', array('host'=>$host, 'path'=>$path), null, $bucket, null, $action_type);
+    $req->Header['Content-Type'] = 'application/x-www-form-urlencoded';
+
+    $client = new UCloud_AuthHttpClient(null);
+    list($data, $err) = UCloud_Client_Call($client, $req);
+    return array($data, $err);
+}
+
+//------------------------------生成公有文件Url------------------------------
+// @results: $url
+function UCloud_MakePublicUrl($bucket, $key)
+{
+    global $UCLOUD_PROXY_SUFFIX;
+    return $bucket . $UCLOUD_PROXY_SUFFIX . "/" . rawurlencode($key);
+}
+//------------------------------生成私有文件Url------------------------------
+// @results: $url
+function UCloud_MakePrivateUrl($bucket, $key, $expires = 0)
+{
+
+    $err = CheckConfig(ActionType::GETFILE);
+    if ($err != null) {
+        return array(null, $err);
+    }
+
+    global $UCLOUD_PUBLIC_KEY;
+
+    $public_url = UCloud_MakePublicUrl($bucket, $key);
+    $req = new HTTP_Request('GET', array('path'=>$public_url), null, $bucket, $key);
+    if ($expires > 0) {
+        $req->Header['Expires'] = $expires;
+    }
+
+    $client = new UCloud_AuthHttpClient(null);
+    $temp = $client->Auth->SignRequest($req, null, QUERY_STRING_CHECK);
+    $signature = substr($temp, -28, 28);
+    $url = $public_url . "?UCloudPublicKey=" . rawurlencode($UCLOUD_PUBLIC_KEY) . "&Signature=" . rawurlencode($signature);
+    if ('' != $expires) {
+        $url .= "&Expires=" . rawurlencode($expires);
+    }
+    return $url;
+}
diff --git a/v1/ucloud/utils.php b/v1/ucloud/utils.php
index a785ecf..0b7f050 100644
--- a/v1/ucloud/utils.php
+++ b/v1/ucloud/utils.php
@@ -18,6 +18,7 @@ abstract class ActionType
     const GETFILE   = 8;
     const APPENDFILE = 9;
     const LISTOBJECTS = 10;
+    const HEAD = 11;
 }
 
 class UCloud_Error
@@ -127,6 +128,7 @@ function CheckConfig($action) {
         case ActionType::DELETE:
         case ActionType::UPLOADHIT:
         case ActionType::LISTOBJECTS:
+        case ActionType::HEAD:
             if ($UCLOUD_PROXY_SUFFIX == "") {
                     return new UCloud_Error(400, -1, "no proxy suffix found in config");
             } else if ($UCLOUD_PUBLIC_KEY == "" || strstr($UCLOUD_PUBLIC_KEY, " ") != FALSE) {