diff --git a/lib/qiniu/rs.rb b/lib/qiniu/rs.rb
index d714708..4e18d09 100755
--- a/lib/qiniu/rs.rb
+++ b/lib/qiniu/rs.rb
@@ -100,12 +100,14 @@ module Qiniu
       end
 
       def upload_file opts = {}
-        [:uptoken, :file, :bucket, :key].each do |opt|
-          raise MissingArgsError, [opt] unless opts.has_key?(opt)
-        end
+        uncontained_opts = [:uptoken, :file, :bucket, :key] - opts.keys 
+        raise MissingArgsError, uncontained_opts unless uncontained_opts.empty?
+
         source_file = opts[:file]
         raise NoSuchFileError, source_file unless File.exist?(source_file)
+
         opts[:enable_resumable_upload] = true unless opts.has_key?(:enable_resumable_upload)
+
         if opts[:enable_resumable_upload] && File::size(source_file) > Config.settings[:block_size]
           code, data = UP.upload_with_token(opts[:uptoken],
                                             opts[:file],
diff --git a/spec/qiniu/rs_spec.rb b/spec/qiniu/rs_spec.rb
index 39c94c8..1710fc4 100755
--- a/spec/qiniu/rs_spec.rb
+++ b/spec/qiniu/rs_spec.rb
@@ -3,6 +3,7 @@
 require 'digest/sha1'
 require 'spec_helper'
 require 'qiniu/rs'
+require 'qiniu/rs/exceptions'
 
 module Qiniu
   describe RS do
@@ -148,6 +149,29 @@ module Qiniu
         result.should_not be_false
         puts result.inspect
       end
+
+      it "should raise MissingArgsError" do
+        uptoken_opts = {:scope => @bucket, :escape => 0}
+        upload_opts = {
+          :uptoken => Qiniu::RS.generate_upload_token(uptoken_opts),
+          :file => __FILE__,
+          :key => @key,
+          :enable_crc32_check => true
+        }
+        lambda { Qiniu::RS.upload_file(upload_opts) }.should raise_error(RS::MissingArgsError)
+      end
+
+      it "should raise NoSuchFileError" do
+        uptoken_opts = {:scope => @bucket, :escape => 0}
+        upload_opts = {
+          :uptoken => Qiniu::RS.generate_upload_token(uptoken_opts),
+          :file => 'no_this_file',
+          :bucket => @bucket,
+          :key => @key,
+          :enable_crc32_check => true
+        }
+        lambda { Qiniu::RS.upload_file(upload_opts) }.should raise_error(RS::NoSuchFileError)
+      end
     end
 
     context ".resumable_upload_file" do