diff --git a/CHANGELOG.md b/CHANGELOG.md
index aee5a83..70d1f53 100644
--- a/CHANGELOG.md
+++ b/CHANGELOG.md
@@ -1,5 +1,9 @@
 ## CHANGE LOG
 
+### v6.4.0
+
+- 为 put_with_put_policy() 添加 opts 参数，允许使用 :content_type 键指定上传文件的 mime type。 [https://github.com/qiniu/ruby-sdk/pull/111](https://github.com/qiniu/ruby-sdk/pull/111)
+
 ### v6.3.2
 
 - 调整上传host。 [https://github.com/qiniu/ruby-sdk/pull/103](https://github.com/qiniu/ruby-sdk/pull/103)
diff --git a/Gemfile.lock b/Gemfile.lock
index e0df932..c162822 100644
--- a/Gemfile.lock
+++ b/Gemfile.lock
@@ -1,7 +1,7 @@
 PATH
   remote: .
   specs:
-    qiniu (6.3.1)
+    qiniu (6.4.0)
       json (~> 1.7)
       mime-types (~> 1.19)
       rest-client (~> 1.6)
diff --git a/lib/qiniu/config.rb b/lib/qiniu/config.rb
index ac59b99..bd1f3d6 100755
--- a/lib/qiniu/config.rb
+++ b/lib/qiniu/config.rb
@@ -20,6 +20,7 @@ module Qiniu
           :content_type    => 'application/x-www-form-urlencoded',
           :auth_url        => "https://acc.qbox.me/oauth2/token",
           :rs_host         => "http://rs.qiniu.com",
+          :rsf_host        => "http://rsf.qbox.me",
           :up_host         => "http://upload.qiniu.com",
           :pub_host        => "http://pu.qbox.me:10200",
           :eu_host         => "http://eu.qbox.me",
diff --git a/lib/qiniu/management.rb b/lib/qiniu/management.rb
index b115817..0c07401 100755
--- a/lib/qiniu/management.rb
+++ b/lib/qiniu/management.rb
@@ -1,10 +1,48 @@
 # -*- encoding: utf-8 -*-
 # vim: sw=2 ts=2
 
+require 'qiniu/adt'
 require 'qiniu/http'
 
 module Qiniu
     module Storage
+      class ListPolicy
+        include ADT::Policy
+
+        private
+        def initialize(bucket,
+                       limit = 1000,
+                       prefix = '',
+                       delimiter = '')
+          @bucket     = bucket
+          @limit      = limit
+          @prefix     = prefix
+          @delimiter  = delimiter
+        end # initialize
+
+        public
+        PARAMS = {
+          # 字符串类型参数
+          :bucket     =>  "bucket",
+          :prefix     =>  "prefix",
+          :delimiter  =>  "delimiter",
+          :marker     =>  "marker",
+
+          # 数值类型参数
+          :limit      =>  "limit"
+        } # PARAMS
+
+        PARAMS.each_pair do |key, fld|
+          attr_accessor key
+        end
+
+        def params
+          return PARAMS
+        end # params
+
+        alias :to_s :to_query_string
+      end # class ListPolicy
+
       class << self
         include Utils
 
@@ -86,6 +124,26 @@ module Qiniu
           save_as(bucket, key, source_image_url, mogrify_params_string)
         end # image_mogrify_save_as
 
+        def list(list_policy)
+          url = Config.settings[:rsf_host] + '/list?' + list_policy.to_query_string()
+
+          resp_code, resp_body, resp_headers = HTTP.management_post(url)
+          if resp_code == 0 || resp_code > 299 then
+            has_more = false
+            return resp_code, resp_body, resp_headers, has_more, list_policy
+          end
+
+          has_more = (resp_body['marker'].is_a?(String) && resp_body['marker'] != '')
+          if has_more then
+            new_list_policy = list_policy.clone()
+            new_list_policy.marker = resp_body['marker']
+          else
+            new_list_policy = list_policy
+          end
+
+          return resp_code, resp_body, resp_headers, has_more, new_list_policy
+        end # list
+
         private
 
         def _generate_cp_or_mv_opstr(command, source_bucket, source_key, target_bucket, target_key)
@@ -102,6 +160,7 @@ module Qiniu
           url = Config.settings[:rs_host] + "/batch"
           return HTTP.management_post(url, execs.join("&"))
         end # _batch_cp_or_mv
-      end
+
+      end # class << self
     end # module Storage
 end # module Qiniu
diff --git a/lib/qiniu/upload.rb b/lib/qiniu/upload.rb
old mode 100755
new mode 100644
index 4e76eec..c103e1a
--- a/lib/qiniu/upload.rb
+++ b/lib/qiniu/upload.rb
@@ -47,15 +47,23 @@ module Qiniu
       def upload_with_token_2(uptoken,
                               local_file,
                               key = nil,
-                              x_vars = nil)
+                              x_vars = nil,
+                              opts = {})
         ### 构造URL
         url = Config.settings[:up_host]
         url[/\/*$/] = ''
         url += '/'
 
         ### 构造HTTP Body
+        file = File.new(local_file, 'rb')
+        if not opts[:content_type].nil?
+          file.define_singleton_method("content_type") do
+            opts[:content_type]
+          end
+        end
+
         post_data = {
-          :file      => File.new(local_file, 'rb'),
+          :file      => file,
           :multipart => true,
         }
         if not uptoken.nil?
@@ -84,13 +92,14 @@ module Qiniu
       def upload_with_put_policy(put_policy,
                                  local_file,
                                  key = nil,
-                                 x_vars = nil)
+                                 x_vars = nil,
+                                 opts = {})
         uptoken = Auth.generate_uptoken(put_policy)
         if key.nil? then
           key = put_policy.key
         end
 
-        return upload_with_token_2(uptoken, local_file, key, x_vars)
+        return upload_with_token_2(uptoken, local_file, key, x_vars, opts)
       end # upload_with_put_policy
 
       private
diff --git a/lib/qiniu/version.rb b/lib/qiniu/version.rb
index 3fd72d0..2aa467c 100755
--- a/lib/qiniu/version.rb
+++ b/lib/qiniu/version.rb
@@ -3,8 +3,8 @@
 module Qiniu
     module Version
       MAJOR = 6
-      MINOR = 3
-      PATCH = 2
+      MINOR = 4
+      PATCH = 0
       # Returns a version string by joining <tt>MAJOR</tt>, <tt>MINOR</tt>, and <tt>PATCH</tt> with <tt>'.'</tt>
       #
       # Example