Update README.md

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README.md
@@ -197,7 +197,7 @@ r = WxPay::Service.generate_js_pay_req params
  
 #### Notify Process
  
-A simple example of processing notify.
+A simple example of processing notify for Rails Action Controller.
  
 ```ruby
 # config/routes.rb
@@ -219,6 +219,39 @@ def notify
 end
 ```
  
+A simple example of processing notify for Grape v1.2.2 .
+
+```ruby
+# Gemfile
+gem 'multi_xml'
+
+# config/routes.rb
+mount Wechat::Api => '/notify'
+
+# app/api/wechat/api.rb
+module Wechat
+  class Api < Grape::API
+    content_type :xml, 'text/xml'
+    format :xml
+    formatter :xml, lambda { |object, env| object.to_xml(root: 'xml', dasherize: false) }
+    
+    post "" do
+      result = params["xml"]
+      if WxPay::Sign.verify?(result)
+          # find your order and process the post-paid logic.
+          
+        status 200
+        {return_code: "SUCCESS"}
+      else
+        status 200
+        {return_code: "FAIL", return_msg: "签名失败"}
+      end
+    end
+  end
+end
+```
+
+
 ### Integrate with QRCode(二维码)
  
 Wechat payment integrating with QRCode is a recommended process flow which will bring users comfortable experience. It is recommended to generate QRCode using `rqrcode` and `rqrcode_png`.
...	...	@@ -197,7 +197,7 @@ r = WxPay::Service.generate_js_pay_req params
197	197
198	198	#### Notify Process
199	199
200		-A simple example of processing notify.
	200	+A simple example of processing notify for Rails Action Controller.
201	201
202	202	```ruby
203	203	# config/routes.rb
...	...	@@ -219,6 +219,39 @@ def notify
219	219	end
220	220	```
221	221
	222	+A simple example of processing notify for Grape v1.2.2 .
	223	+
	224	+```ruby
	225	+# Gemfile
	226	+gem 'multi_xml'
	227	+
	228	+# config/routes.rb
	229	+mount Wechat::Api => '/notify'
	230	+
	231	+# app/api/wechat/api.rb
	232	+module Wechat
	233	+ class Api < Grape::API
	234	+ content_type :xml, 'text/xml'
	235	+ format :xml
	236	+ formatter :xml, lambda { \|object, env\| object.to_xml(root: 'xml', dasherize: false) }
	237	+
	238	+ post "" do
	239	+ result = params["xml"]
	240	+ if WxPay::Sign.verify?(result)
	241	+ # find your order and process the post-paid logic.
	242	+
	243	+ status 200
	244	+ {return_code: "SUCCESS"}
	245	+ else
	246	+ status 200
	247	+ {return_code: "FAIL", return_msg: "签名失败"}
	248	+ end
	249	+ end
	250	+ end
	251	+end
	252	+```
	253	+
	254	+
222	255	### Integrate with QRCode(二维码)
223	256
224	257	Wechat payment integrating with QRCode is a recommended process flow which will bring users comfortable experience. It is recommended to generate QRCode using `rqrcode` and `rqrcode_png`.
...	...