README.md in carrierwave_ucloud-0.1.0 vs README.md in carrierwave_ucloud-0.1.2

@@ -1,10 +1,10 @@
 # CarrierwaveUcloud
 
-Welcome to your new gem! In this directory, you'll find the files you need to be able to package up your Ruby library into a gem. Put your Ruby code in the file `lib/carrierwave_ucloud`. To experiment with that code, run `bin/console` for an interactive prompt.
+Ucloud Ufile CarrierWave Gem。
 
-TODO: Delete this and the text above, and describe your gem
+参考了aws/aliyun/ucloud多个已有CarrierWave插件的代码，感谢他们的付出。
 
 ## Installation
 
 Add this line to your application's Gemfile:
 
@@ -20,10 +20,39 @@
 
     $ gem install carrierwave_ucloud
 
 ## Usage
 
-TODO: Write usage instructions here
+配置文件：config/initializers/carrierwave.rb，内容如下：
+
+```ruby
+# public / private 最少配置一套，ucloud_public_read自己要对应好，暂时没有做任何校验逻辑
+CarrierWave.configure do |config|
+  config.storage = :ucloud
+  config.ucloud_public_key = "public_key"
+  config.ucloud_private_key = "private_key"
+  config.ucloud_public_read = true # 默认使用public bucket，可在单个uploader覆写
+  # public bucket配置
+  config.ucloud_public_bucket = "public_bucket_name"
+  config.ucloud_public_bucket_host = "http://public_bucket_name.cn-bj.ufileos.com"
+  config.ucloud_public_cdn_host = "http://public_bucket_name.cn-bj.ufileos.com"
+  config.ucloud_private_bucket = "private_bucket_name"
+  # private bucket配置
+  config.ucloud_private_bucket_host = "http://private_bucket_name.cn-bj.ufileos.com"
+  config.ucloud_private_cdn_host = "http://private_bucket_name.cn-bj.ufileos.com"
+  config.ucloud_private_expire_seconds = 300
+end
+```
+
+全局配置ucloud_public_read，默认使用对应bucket配置，个别uploader如要用另外一种bucket配置，添加如下方法:
+```ruby
+class XxxUploader < CarrierWave::Uploader::Base
+  def ucloud_public_read
+    # true or false，XxxUploader以此配置选择bucket配置及逻辑
+  end
+end
+```
+
 
 ## Development
 
 After checking out the repo, run `bin/setup` to install dependencies. Then, run `rake spec` to run the tests. You can also run `bin/console` for an interactive prompt that will allow you to experiment.