diff --git a/lib/qiniu/resumable_upload.rb b/lib/qiniu/resumable_upload.rb
new file mode 100755
index 0000000..290458f
--- /dev/null
+++ b/lib/qiniu/resumable_upload.rb
@@ -0,0 +1,307 @@
+# -*- encoding: utf-8 -*-
+
+require 'zlib'
+require 'yaml'
+require 'tmpdir'
+require 'fileutils'
+require 'mime/types'
+require 'digest/sha1'
+require 'qiniu/abstract'
+require 'qiniu/exceptions'
+require 'qiniu/io'
+
+module Qiniu
+    module Storage
+
+      module AbstractClass
+        class ChunkProgressNotifier
+          include Qiniu::Abstract
+          abstract_methods :notify
+          # def notify(block_index, block_put_progress); end
+        end
+
+        class BlockProgressNotifier
+          include Qiniu::Abstract
+          abstract_methods :notify
+          # def notify(block_index, checksum); end
+        end
+      end # module AbstractClass
+
+      class ChunkProgressNotifier < AbstractClass::ChunkProgressNotifier
+          def notify(index, progress)
+              logmsg = "chunk #{progress[:offset]/Config.settings[:chunk_size]} in block #{index} successfully uploaded.\n" + progress.to_s
+              Utils.debug(logmsg)
+          end
+      end # class ChunkProgressNotifier
+
+      class BlockProgressNotifier < AbstractClass::BlockProgressNotifier
+          def notify(index, checksum)
+              Utils.debug "block #{index}: {ctx: #{checksum}} successfully uploaded."
+              Utils.debug "block #{index}: {checksum: #{checksum}} successfully uploaded."
+          end
+      end # class BlockProgressNotifier
+
+      class << self
+        include Utils
+
+        def resumable_upload_with_token(uptoken,
+                              local_file,
+                              bucket,
+                              key = nil,
+                              mime_type = nil,
+                              custom_meta = nil,
+                              customer = nil,
+                              callback_params = nil,
+                              rotate = nil)
+          begin
+            ifile = File.open(local_file, 'rb')
+            fh = FileData.new(ifile)
+            fsize = fh.data_size
+            key = Digest::SHA1.hexdigest(local_file + fh.mtime.to_s) if key.nil?
+            if mime_type.nil? || mime_type.empty?
+              mime = MIME::Types.type_for local_file
+              mime_type = mime.empty? ? 'application/octet-stream' : mime[0].content_type
+            end
+            code, data = _resumable_upload(uptoken, fh, fsize, bucket, key, mime_type, custom_meta, customer, callback_params, rotate)
+            [code, data]
+          ensure
+            ifile.close unless ifile.nil?
+          end
+        end # resumable_upload_with_token
+
+        private
+
+        class FileData
+            attr_accessor :fh
+            def initialize(fh)
+                @fh = fh
+            end
+            def data_size
+                @fh.stat.size
+            end
+            def get_data(offset, length)
+                @fh.seek(offset)
+                @fh.read(length)
+            end
+            def path
+                @fh.path
+            end
+            def mtime
+                @fh.mtime
+            end
+            #delegate :path, :mtime, :to => :fh
+        end # class FileData
+
+        def _new_block_put_progress_data
+          {:ctx => nil, :offset => 0, :restsize => nil, :status_code => nil, :host => nil}
+        end # _new_block_put_progress_data
+
+        def _call_binary_with_token(uptoken, url, data, content_type = nil, retry_times = 0)
+          options = {
+              :method => :post,
+              :content_type => 'application/octet-stream',
+              :upload_signature_token => uptoken
+          }
+          options[:content_type] = content_type if !content_type.nil? && !content_type.empty?
+          code, data = http_request url, data, options
+          unless Utils.is_response_ok?(code)
+              retry_times += 1
+              if Config.settings[:auto_reconnect] && retry_times < Config.settings[:max_retry_times]
+                  return _call_binary_with_token(uptoken, url, data, options[:content_type], retry_times)
+              end
+          end
+          [code, data]
+        end # _call_binary_with_token
+
+        def _mkblock(uptoken, block_size, body)
+            url = Config.settings[:up_host] + "/mkblk/#{block_size}"
+            _call_binary_with_token(uptoken, url, body)
+        end # _mkblock
+
+        def _putblock(uphost, uptoken, ctx, offset, body)
+            url = uphost + "/bput/#{ctx}/#{offset}"
+            _call_binary_with_token(uptoken, url, body)
+        end # _putblock
+
+        def _resumable_put_block(uptoken,
+                                 fh,
+                                 block_index,
+                                 block_size,
+                                 chunk_size,
+                                 progress,
+                                 retry_times,
+                                 notifier)
+            code, data = 0, {}
+            fpath = fh.path
+
+            # this block has never been uploaded.
+            if progress[:ctx] == nil || progress[:ctx].empty?
+                progress[:offset] = 0
+                progress[:restsize] = block_size
+                # choose the smaller one
+                body_length = [block_size, chunk_size].min
+                for i in 1..retry_times
+                    seek_pos = block_index*Config.settings[:block_size]
+                    body = fh.get_data(seek_pos, body_length)
+                    result_length = body.length
+                    if result_length != body_length
+                        raise FileSeekReadError.new(fpath, block_index, seek_pos, body_length, result_length)
+                    end
+                    code, data = _mkblock(uptoken, block_size, body)
+                    body_crc32 = Zlib.crc32(body)
+                    if Utils.is_response_ok?(code) && data["crc32"] == body_crc32
+                        progress[:ctx] = data["ctx"]
+                        progress[:offset] = body_length
+                        progress[:restsize] = block_size - body_length
+                        progress[:status_code] = code
+                        progress[:host] = data["host"]
+                        if !notifier.nil? && notifier.respond_to?("notify")
+                            notifier.notify(block_index, progress)
+                        end
+                        break
+                    elsif i == retry_times && data["crc32"] != body_crc32
+                        Log.logger.error %Q(Uploading block error. Expected crc32: #{body_crc32}, but got: #{data["crc32"]})
+                    end
+                end
+            elsif progress[:offset] + progress[:restsize] != block_size
+                raise BlockSizeNotMathchError.new(fpath, block_index, progress[:offset], progress[:restsize], block_size)
+            end
+
+            # loop uploading other chunks except the first one
+            while progress[:restsize].to_i > 0 && progress[:restsize] < block_size
+                # choose the smaller one
+                body_length = [progress[:restsize], chunk_size].min
+                for i in 1..retry_times
+                    seek_pos = block_index*Config.settings[:block_size] + progress[:offset]
+                    body = fh.get_data(seek_pos, body_length)
+                    result_length = body.length
+                    if result_length != body_length
+                        raise FileSeekReadError.new(fpath, block_index, seek_pos, body_length, result_length)
+                    end
+                    code, data = _putblock(progress[:host], uptoken, progress[:ctx], progress[:offset], body)
+                    body_crc32 = Zlib.crc32(body)
+                    if Utils.is_response_ok?(code) && data["crc32"] == body_crc32
+                        progress[:ctx] = data["ctx"]
+                        progress[:offset] += body_length
+                        progress[:restsize] -= body_length
+                        progress[:status_code] = code
+                        progress[:host] = data["host"]
+                        if !notifier.nil? && notifier.respond_to?("notify")
+                            notifier.notify(block_index, progress)
+                        end
+                        break
+                    elsif i == retry_times && data["crc32"] != body_crc32
+                        Log.logger.error %Q(Uploading block error. Expected crc32: #{body_crc32}, but got: #{data["crc32"]})
+                    end
+                end
+            end
+            # return
+            return [code, data]
+        end # _resumable_put_block
+
+        def _block_count(fsize)
+            ((fsize + Config.settings[:block_size] - 1) / Config.settings[:block_size]).to_i
+        end # _block_count
+
+        def _resumable_put(uptoken,
+                           fh,
+                           checksums,
+                           progresses,
+                           block_notifier = nil,
+                           chunk_notifier = nil)
+            code, data = 0, {}
+            fsize = fh.data_size
+            block_count = _block_count(fsize)
+            checksum_count = checksums.length
+            progress_count = progresses.length
+            if checksum_count != block_count || progress_count != block_count
+                raise BlockCountNotMathchError.new(fh.path, block_count, checksum_count, progress_count)
+            end
+            0.upto(block_count-1).each do |block_index|
+                if checksums[block_index].nil? || checksums[block_index].empty?
+                    block_size = Config.settings[:block_size]
+                    if block_index == block_count - 1
+                        block_size = fsize - block_index*Config.settings[:block_size]
+                    end
+                    if progresses[block_index].nil?
+                        progresses[block_index] = _new_block_put_progress_data
+                    end
+                    #code, data = _resumable_put_block(uptoken, fh, block_index, block_size, Config.settings[:chunk_size], progresses[block_index], Config.settings[:max_retry_times], chunk_notifier)
+                    # Put the whole block as a chunk
+                    code, data = _resumable_put_block(uptoken, fh, block_index, block_size, block_size, progresses[block_index], Config.settings[:max_retry_times], chunk_notifier)
+                    if Utils.is_response_ok?(code)
+                        #checksums[block_index] = data["checksum"]
+                        checksums[block_index] = data["ctx"]
+                        if !block_notifier.nil? && block_notifier.respond_to?("notify")
+                            block_notifier.notify(block_index, checksums[block_index])
+                        end
+                    end
+                end
+            end
+            return [code, data]
+        end # _resumable_put
+
+        def _mkfile(uphost,
+                    uptoken,
+                    entry_uri,
+                    fsize,
+                    checksums,
+                    mime_type = nil,
+                    custom_meta = nil,
+                    customer = nil,
+                    callback_params = nil,
+                    rotate = nil)
+          path = '/rs-mkfile/' + Utils.urlsafe_base64_encode(entry_uri) + "/fsize/#{fsize}"
+          path += '/mimeType/' + Utils.urlsafe_base64_encode(mime_type) if !mime_type.nil? && !mime_type.empty?
+          path += '/meta/' + Utils.urlsafe_base64_encode(custom_meta) if !custom_meta.nil? && !custom_meta.empty?
+          path += '/customer/' + customer if !customer.nil? && !customer.empty?
+          callback_query_string = Utils.generate_query_string(callback_params) if !callback_params.nil? && !callback_params.empty?
+          path += '/params/' + Utils.urlsafe_base64_encode(callback_query_string) if !callback_query_string.nil? && !callback_query_string.empty?
+          path += '/rotate/' + rotate if !rotate.nil? && rotate.to_i >= 0
+          url = uphost + path
+          #body = ''
+          #checksums.each do |checksum|
+          #    body += Utils.urlsafe_base64_decode(checksum)
+          #end
+          body = checksums.join(',')
+          _call_binary_with_token(uptoken, url, body, 'text/plain')
+        end # _mkfile
+
+        def _resumable_upload(uptoken,
+                              fh,
+                              fsize,
+                              bucket,
+                              key,
+                              mime_type = nil,
+                              custom_meta = nil,
+                              customer = nil,
+                              callback_params = nil,
+                              rotate = nil)
+
+          block_count = _block_count(fsize)
+
+          chunk_notifier = ChunkProgressNotifier.new()
+          block_notifier = BlockProgressNotifier.new()
+
+          progresses = []
+          block_count.times{progresses << _new_block_put_progress_data}
+          checksums = []
+          block_count.times{checksums << ''}
+
+          code, data = _resumable_put(uptoken, fh, checksums, progresses, block_notifier, chunk_notifier)
+
+          if Utils.is_response_ok?(code)
+            uphost = data["host"]
+            entry_uri = bucket + ':' + key
+            code, data = _mkfile(uphost, uptoken, entry_uri, fsize, checksums, mime_type, custom_meta, customer, callback_params, rotate)
+          end
+
+          if Utils.is_response_ok?(code)
+            Utils.debug "File #{fh.path} {size: #{fsize}} successfully uploaded."
+          end
+
+          [code, data]
+        end # _resumable_upload
+      end # self class
+    end # module Storage
+end # module Qiniu
diff --git a/lib/qiniu/storage.rb b/lib/qiniu/storage.rb
new file mode 100755
index 0000000..c10da81
--- /dev/null
+++ b/lib/qiniu/storage.rb
@@ -0,0 +1,4 @@
+# -*- encoding: utf-8 -*-
+
+require 'qiniu/upload'
+require 'qiniu/resumable_upload'
diff --git a/lib/qiniu/upload.rb b/lib/qiniu/upload.rb
new file mode 100755
index 0000000..73f9d98
--- /dev/null
+++ b/lib/qiniu/upload.rb
@@ -0,0 +1,114 @@
+# -*- encoding: utf-8 -*-
+
+module Qiniu
+  module Storage
+    class << self
+      include Utils
+
+      def put_file(local_file,
+                   bucket,
+                   key = nil,
+                   mime_type = nil,
+                   custom_meta = nil,
+                   enable_crc32_check = false)
+        action_params = _generate_action_params(
+          local_file,
+          bucket,
+          key,
+          mime_type,
+          custom_meta,
+          enable_crc32_check
+        )
+
+        url = Config.settings[:io_host] + action_params
+        options = {:content_type => 'application/octet-stream'}
+
+        Auth.request url, ::IO.read(local_file), options
+      end # put_file
+
+      def upload_with_token(uptoken,
+                            local_file,
+                            bucket,
+                            key = nil,
+                            mime_type = nil,
+                            custom_meta = nil,
+                            callback_params = nil,
+                            enable_crc32_check = false,
+                            rotate = nil)
+        action_params = _generate_action_params(
+          local_file,
+          bucket,
+          key,
+          mime_type,
+          custom_meta,
+          enable_crc32_check,
+          rotate
+        )
+
+        if callback_params.nil?
+          callback_params = {:bucket => bucket, :key => key, :mime_type => mime_type}
+        end
+        callback_query_string = Utils.generate_query_string(callback_params)
+        url = Config.settings[:up_host] + '/upload'
+
+        Utils.upload_multipart_data(url, local_file, action_params, callback_query_string, uptoken)
+      end # upload_with_token
+
+      def upload_with_token_2(uptoken,
+                              local_file,
+                              key = nil,
+                              x_vars = nil)
+        ### 构造URL
+        url = Config.settings[:up_host]
+        url[/\/*$/] = ''
+        url += '/'
+
+        ### 构造HTTP Body
+        post_data = {
+          :file      => File.new(local_file, 'rb'),
+          :multipart => true,
+        }
+        if not uptoken.nil?
+          post_data[:token] = uptoken
+        end
+        if not key.nil?
+          post_data[:key] = key
+        end
+        if x_vars.is_a?(Hash)
+          post_data.merge!(x_vars)
+        end
+
+        ### 发送请求
+        Utils.http_request url, post_data
+      end # upload_with_token_2
+
+      private
+      def _generate_action_params(local_file,
+                                  bucket,
+                                  key = nil,
+                                  mime_type = nil,
+                                  custom_meta = nil,
+                                  enable_crc32_check = false,
+                                  rotate = nil)
+        raise NoSuchFileError, local_file unless File.exist?(local_file)
+
+        if key.nil?
+          key = Digest::SHA1.hexdigest(local_file + Time.now.to_s)
+        end
+
+        entry_uri = bucket + ':' + key
+        if mime_type.nil? || mime_type.empty?
+          mime = MIME::Types.type_for local_file
+          mime_type = mime.empty? ? 'application/octet-stream' : mime[0].content_type
+        end
+
+        action_params = '/rs-put/' + Utils.urlsafe_base64_encode(entry_uri) + '/mimeType/' + Utils.urlsafe_base64_encode(mime_type)
+        action_params += '/meta/' + Utils.urlsafe_base64_encode(custom_meta) unless custom_meta.nil?
+        action_params += '/crc32/' + Utils.crc32checksum(local_file).to_s if enable_crc32_check
+        action_params += '/rotate/' + rotate if !rotate.nil? && rotate.to_i >= 0
+        action_params
+      end # _generate_action_params
+
+    end # class << self
+  end # module Storage
+end # module Qiniu
diff --git a/spec/qiniu/storage_spec.rb b/spec/qiniu/storage_spec.rb
new file mode 100755
index 0000000..412d109
--- /dev/null
+++ b/spec/qiniu/storage_spec.rb
@@ -0,0 +1,184 @@
+# -*- encoding: utf-8 -*-
+
+require 'spec_helper'
+require 'qiniu/auth'
+require 'qiniu/storage'
+require 'digest/sha1'
+
+module Qiniu
+  module Storage
+    describe Storage do
+
+      before :all do
+        @bucket = 'RubySdkTest' + (Time.now.to_i+rand(1000)).to_s
+        @key = Digest::SHA1.hexdigest((Time.now.to_i+rand(100)).to_s)
+
+        @localfile1 = "bigfile.txt"
+        File.open(@localfile1, "w"){|f| 5242888.times{ f.write(rand(9).to_s) }}
+        @key1 = Digest::SHA1.hexdigest(@localfile1+Time.now.to_s)
+
+        @localfile2 = "bigfile2.txt"
+        File.open(@localfile2, "w"){|f| (1 << 22).times{ f.write(rand(9).to_s) }}
+        @key2 = Digest::SHA1.hexdigest(@localfile2+Time.now.to_s)
+
+        @localfile3 = "bigfile3.txt"
+        File.open(@localfile3, "w"){|f| (1 << 23).times{ f.write(rand(9).to_s) }}
+        @key3 = Digest::SHA1.hexdigest(@localfile3+Time.now.to_s)
+
+        @localfile4 = "smallfile.txt"
+        File.open(@localfile4, "w"){|f| (1 << 20).times{ f.write(rand(9).to_s) }}
+        @key4 = Digest::SHA1.hexdigest(@localfile4+Time.now.to_s)
+
+        result = Qiniu.mkbucket(@bucket)
+        puts result.inspect
+        result.should be_true
+      end
+
+      after :all do
+        File.unlink(@localfile1) if File.exists?(@localfile1)
+        File.unlink(@localfile2) if File.exists?(@localfile2)
+        File.unlink(@localfile3) if File.exists?(@localfile3)
+        File.unlink(@localfile4) if File.exists?(@localfile4)
+
+        result = Qiniu.drop(@bucket)
+        puts result.inspect
+        result.should_not be_false
+      end
+
+      context ".put_file" do
+        it "should works" do
+          code, data = Qiniu::Storage.put_file(__FILE__, @bucket, @key, 'application/x-ruby', 'customMeta', true)
+          code.should == 200
+          puts data.inspect
+        end
+      end
+
+      context ".upload_with_token" do
+        it "should works" do
+          upopts = {:scope => @bucket, :expires_in => 3600, :customer => "why404@gmail.com"}
+          uptoken = Qiniu.generate_upload_token(upopts)
+          code, data = Qiniu::Storage.upload_with_token(uptoken, __FILE__, @bucket, @key, nil, nil, nil, true)
+          code.should == 200
+          puts data.inspect
+        end
+      end
+
+      context ".upload_with_token_2" do
+        it "should works" do
+          upopts = {:scope => @bucket, :expires_in => 3600, :endUser => "why404@gmail.com"}
+          uptoken = Qiniu.generate_upload_token(upopts)
+
+          code, data = Qiniu::Storage.upload_with_token_2(uptoken, __FILE__, @key)
+
+          code.should == 200
+          puts data.inspect
+        end
+      end # .upload_with_token_2
+
+      context ".resumable_upload_with_token" do
+        it "should works" do
+          upopts = {:scope => @bucket, :expires_in => 3600, :customer => "why404@gmail.com"}
+          uptoken = Qiniu.generate_upload_token(upopts)
+          code, data = Qiniu::Storage.resumable_upload_with_token(uptoken, @localfile1, @bucket, @key1)
+          puts data.inspect
+          (code/100).should == 2
+        end
+      end
+
+      context ".stat" do
+        it "should exists" do
+          code, data = Qiniu::RS.stat(@bucket, @key1)
+          puts data.inspect
+          code.should == 200
+        end
+      end
+
+      context ".delete" do
+        it "should works" do
+          code, data = Qiniu::RS.delete(@bucket, @key1)
+          puts data.inspect
+          code.should == 200
+        end
+      end
+
+      context ".resumable_upload_with_token2" do
+        it "should works" do
+          upopts = {:scope => @bucket, :expires_in => 3600, :customer => "why404@gmail.com"}
+          uptoken = Qiniu.generate_upload_token(upopts)
+          code, data = Qiniu::Storage.resumable_upload_with_token(uptoken, @localfile2, @bucket, @key2)
+          puts data.inspect
+          (code/100).should == 2
+        end
+      end
+
+      context ".stat" do
+        it "should exists" do
+          code, data = Qiniu::RS.stat(@bucket, @key2)
+          puts data.inspect
+          code.should == 200
+        end
+      end
+
+      context ".delete" do
+        it "should works" do
+          code, data = Qiniu::RS.delete(@bucket, @key2)
+          puts data.inspect
+          code.should == 200
+        end
+      end
+
+      context ".resumable_upload_with_token3" do
+        it "should works" do
+          upopts = {:scope => @bucket, :expires_in => 3600, :customer => "why404@gmail.com"}
+          uptoken = Qiniu.generate_upload_token(upopts)
+          code, data = Qiniu::Storage.resumable_upload_with_token(uptoken, @localfile3, @bucket, @key3)
+          puts data.inspect
+          (code/100).should == 2
+        end
+      end
+
+      context ".stat" do
+        it "should exists" do
+          code, data = Qiniu::RS.stat(@bucket, @key3)
+          puts data.inspect
+          code.should == 200
+        end
+      end
+
+      context ".delete" do
+        it "should works" do
+          code, data = Qiniu::RS.delete(@bucket, @key3)
+          puts data.inspect
+          code.should == 200
+        end
+      end
+
+      context ".resumable_upload_with_token4" do
+        it "should works" do
+          upopts = {:scope => @bucket, :expires_in => 3600, :customer => "why404@gmail.com"}
+          uptoken = Qiniu.generate_upload_token(upopts)
+          code, data = Qiniu::Storage.resumable_upload_with_token(uptoken, @localfile4, @bucket, @key4)
+          puts data.inspect
+          (code/100).should == 2
+        end
+      end
+
+      context ".stat" do
+        it "should exists" do
+          code, data = Qiniu::RS.stat(@bucket, @key4)
+          puts data.inspect
+          code.should == 200
+        end
+      end
+
+      context ".delete" do
+        it "should works" do
+          code, data = Qiniu::RS.delete(@bucket, @key4)
+          puts data.inspect
+          code.should == 200
+        end
+      end
+
+    end
+  end # module Storage
+end # module Qiniu