diff --git a/Gemfile.lock b/Gemfile.lock
index 90998b9..9c014f2 100644
--- a/Gemfile.lock
+++ b/Gemfile.lock
@@ -1,7 +1,7 @@
 PATH
   remote: .
   specs:
-    qiniu-rs (2.3.1)
+    qiniu-rs (2.3.3)
       json (~> 1.7.3)
       mime-types (~> 1.19)
       rest-client (~> 1.6.7)
diff --git a/docs/README.md b/docs/README.md
index 4ab6a77..8515525 100644
--- a/docs/README.md
+++ b/docs/README.md
@@ -31,6 +31,7 @@ title: Ruby SDK 使用指南 | 七牛云存储
     - [取消公开外链](#unpublish)
     - [图像处理](#op-image)
         - [查看图片属性信息](#image_info)
+        - [查看图片EXIF信息](#image_exif)
         - [获取指定规格的缩略图预览地址](#image_preview_url)
         - [高级图像处理（缩略、裁剪、旋转、转化）](#image_mogrify_preview_url)
         - [高级图像处理（缩略、裁剪、旋转、转化）并持久化](#image_mogrify_save_as)
@@ -484,6 +485,24 @@ height
 colorModel
 : 原始图片着色模式
 
+<a name="image_exif"></a>
+
+#### 查看图片EXIF信息
+
+    Qiniu::RS.image_exif(url)
+
+使用 SDK 提供的 `Qiniu::RS.image_exif` 方法，可以基于一张存储于七牛云存储服务器上的原始图片图片，取到该图片的  EXIF 信息。
+
+**参数**
+
+url
+: 必须，字符串类型（String），原图的下载链接，需是 `Qiniu::RS.get`（或`Qiniu::RS.batch_get`）函数返回值中 `url` 字段的值，或者是 `Qiniu::RS.download`（或`Qiniu::RS.batch_download`）函数返回的下载链接。且文件本身必须是图片。
+
+**返回值**
+
+如果参数 `url` 所代表的图片没有 EXIF 信息，返回 `false`。否则，返回一个包含 EXIF 信息的 Hash 结构。
+
+
 <a name="image_preview_url"></a>
 
 #### 获取指定规格的缩略图预览地址
@@ -505,6 +524,7 @@ spec
 返回一个字符串类型的缩略图 URL
 
 
+
 <a name="image_mogrify_preview_url"></a>
 
 #### 高级图像处理（缩略、裁剪、旋转、转化）
@@ -533,7 +553,7 @@ mogrify_options
         :auto_orient => <TrueOrFalse>
     }
 
-`Qiniu::RS.image_mogrify_preview_url()` 方法是对七牛云存储图像处理高级接口的完整包装，关于 `mogrify_options` 参数里边的具体含义和使用方式，可以参考文档：[图像处理高级接口](#/v2/api/foimg/#fo-imageMogr)。
+`Qiniu::RS.image_mogrify_preview_url()` 方法是对七牛云存储图像处理高级接口的完整包装，关于 `mogrify_options` 参数里边的具体含义和使用方式，可以参考文档：[图像处理高级接口](/v2/api/foimg/#fo-imageMogr)。
 
 **返回值**
 
@@ -574,7 +594,7 @@ mogrify_options
         :auto_orient => <TrueOrFalse>
     }
 
-`Qiniu::RS::Image.mogrify_preview_url()` 方法是对七牛云存储图像处理高级接口的完整包装，关于 `mogrify_options` 参数里边的具体含义和使用方式，可以参考文档：[图像处理高级接口](#/v2/api/foimg/#fo-imageMogr)。
+`Qiniu::RS::Image.mogrify_preview_url()` 方法是对七牛云存储图像处理高级接口的完整包装，关于 `mogrify_options` 参数里边的具体含义和使用方式，可以参考文档：[图像处理高级接口](/v2/api/foimg/#fo-imageMogr)。
 
 **返回值**
 
diff --git a/lib/qiniu/rs.rb b/lib/qiniu/rs.rb
index 0335d64..d02e824 100755
--- a/lib/qiniu/rs.rb
+++ b/lib/qiniu/rs.rb
@@ -124,6 +124,11 @@ module Qiniu
         code == StatusOK ? data : false
       end
 
+      def image_exif(url)
+        code, data = Image.exif(url)
+        code == StatusOK ? data : false
+      end
+
       def image_preview_url(url, spec)
         Image.preivew_url(url, spec)
       end
diff --git a/lib/qiniu/rs/auth.rb b/lib/qiniu/rs/auth.rb
index f254013..226f61b 100755
--- a/lib/qiniu/rs/auth.rb
+++ b/lib/qiniu/rs/auth.rb
@@ -59,7 +59,7 @@ module Qiniu
         end
 
         def call_with_signature(url, data, retry_times = 0, options = {})
-          code, data = http_request url, data, options.merge!({:qbox_signature_token => generate_qbox_signature(url, data)})
+          code, data = http_request url, data, options.merge({:qbox_signature_token => generate_qbox_signature(url, data)})
           [code, data]
         end
 
@@ -68,7 +68,7 @@ module Qiniu
             if Config.settings[:access_key].empty? || Config.settings[:secret_key].empty?
               code, data = Auth.call_with_logged_in(url, data)
             else
-              code, data = Auth.call_with_signature(url, data, options)
+              code, data = Auth.call_with_signature(url, data, 0, options)
             end
           rescue [MissingAccessToken, MissingRefreshToken, MissingUsernameOrPassword] => e
             Log.logger.error e
diff --git a/lib/qiniu/rs/image.rb b/lib/qiniu/rs/image.rb
index 7866c67..63091b5 100755
--- a/lib/qiniu/rs/image.rb
+++ b/lib/qiniu/rs/image.rb
@@ -10,6 +10,10 @@ module Qiniu
           Utils.http_request url + '/imageInfo', nil, {:method => :get}
         end
 
+        def exif(url)
+          Utils.http_request url + '?exif', nil, {:method => :get}
+        end
+
         def preivew_url(url, spec)
           url + '/imagePreview/' + spec.to_s
         end
@@ -29,7 +33,7 @@ module Qiniu
             params_string += %Q(/#{key}/#{opts[key]}) unless opts[key].nil?
           end
           params_string += '/auto-orient' unless opts["auto_orient"].nil?
-          'imageMogr' + params_string
+          'imageMogr' + URI.escape(params_string)
         end
 
       end
diff --git a/lib/qiniu/rs/utils.rb b/lib/qiniu/rs/utils.rb
index b5d4741..dc7a5e4 100755
--- a/lib/qiniu/rs/utils.rb
+++ b/lib/qiniu/rs/utils.rb
@@ -49,10 +49,10 @@ module Qiniu
         header_options.merge!('Authorization' => auth_token) unless auth_token.nil?
         case options[:method]
         when :get
-          response = RestClient.get url, header_options
+          response = RestClient.get(url, header_options)
         when :post
           header_options.merge!(:content_type => options[:content_type])
-          response = RestClient.post url, data, header_options
+          response = RestClient.post(url, data, header_options)
         end
         code = response.respond_to?(:code) ? response.code.to_i : 0
         if code != 200
diff --git a/lib/qiniu/rs/version.rb b/lib/qiniu/rs/version.rb
index 162a3bc..e72d26a 100755
--- a/lib/qiniu/rs/version.rb
+++ b/lib/qiniu/rs/version.rb
@@ -2,6 +2,6 @@
 
 module Qiniu
   module RS
-    VERSION = "2.3.1"
+    VERSION = "2.3.3"
   end
 end
diff --git a/spec/qiniu/rs/image_spec.rb b/spec/qiniu/rs/image_spec.rb
index f603b38..c01ab00 100755
--- a/spec/qiniu/rs/image_spec.rb
+++ b/spec/qiniu/rs/image_spec.rb
@@ -36,7 +36,6 @@ module Qiniu
                                   :file => local_file,
                                   :bucket => @bucket,
                                   :key => @key,
-                                  :mime_type => "image/png",
                                   :enable_crc32_check => true
         result.should be_true
 
@@ -47,7 +46,7 @@ module Qiniu
         @source_image_url = result["url"]
 
         @mogrify_options = {
-            :thumbnail => "!120x120r",
+            :thumbnail => "!120x120>",
             :gravity => "center",
             :crop => "!120x120a0a0",
             :quality => 85,
@@ -65,6 +64,13 @@ module Qiniu
         end
       end
 
+      context ".exif" do
+        it "should works" do
+          code, data = Qiniu::RS::Image.exif(@source_image_url)
+          puts data.inspect
+        end
+      end
+
       context ".mogrify_preview_url" do
         it "should works" do
           mogrify_preview_url = Qiniu::RS::Image.mogrify_preview_url(@source_image_url, @mogrify_options)
diff --git a/spec/qiniu/rs_spec.rb b/spec/qiniu/rs_spec.rb
index d033d5e..5af44a4 100755
--- a/spec/qiniu/rs_spec.rb
+++ b/spec/qiniu/rs_spec.rb
@@ -164,6 +164,17 @@ module Qiniu
       end
     end
 
+    context ".image_exif" do
+      it "should works" do
+        data = Qiniu::RS.get(@test_image_bucket, @test_image_key)
+        data.should_not be_false
+        data.should_not be_empty
+        puts data.inspect
+        result = Qiniu::RS.image_exif(data["url"])
+        puts result.inspect
+      end
+    end
+
     context ".image_mogrify_save_as" do
       it "should works" do
         data = Qiniu::RS.get(@test_image_bucket, @test_image_key)
@@ -175,7 +186,7 @@ module Qiniu
         dest_key = "cropped-" + @test_image_key
         src_img_url = data["url"]
         mogrify_options = {
-          :thumbnail => "!120x120r",
+          :thumbnail => "!120x120>",
           :gravity => "center",
           :crop => "!120x120a0a0",
           :quality => 85,