MCS-4334: change log, tutorial for webhook. (#118)

Author: dariachen

content/en/SUMMARY.md

@@ -67,5 +67,6 @@
    * [2.22](change_log/2.22.md)
    * [2.23](change_log/2.23.md)
    * [2.25](change_log/2.25.md)
+   * [2.26](change_log/2.26.md)
 
 

content/en/change_log/2.26.md

@@ -0,0 +1,4 @@
+# 2018/08/23
+
+## New Features
+1. Users are allowed to compose a customized HTTP request in Trigger & Action. This request will be sent out to the specified server when the trigger criteria are met. [more information](../tutorial/setting_notification)

content/en/change_log/README.md

@@ -1,5 +1,11 @@
 # MCS Change log Summary
 
+## 2018/08/23
+
+### v2.26
+
+[Users are allowed to compose a customized HTTP request in Trigger & Action.](./2.26)
+
 
 ## 2018/07/25
 

content/en/images/Trigger/img_trigger_08.png

@@ -87,11 +87,13 @@ In the **Trigger & Action** tab in the test device page, expand the **Manage you
 
 ### Configuring the Webhook
 
-There is no extra setting for webhook. To use webhook trigger, you only have to select the **webhook** as the action in the trigger & action setting and provide the callback URL that MCS makes an HTTP request to.
+The webhook action allows you to compose a custom HTTP request to send to a server. 
+
+To use webhook trigger, you only need select the **webhook** as the action type in the trigger & action setting and then specify the server **URL**, **request method**, **HTTP headers** and **HTTP body**. You can use the pre-defined variables in URL, value of HTTP header and Body fields.
 
 ![](../images/Trigger/img_trigger_08.png)
 
-There is a Test button for you to test if the trigger has been sent to the URL. The device name, deviceId and the triggered value will be sent to the triggered URL.
+There is a Send webhook button for you to test if this HTTP request is able to sent to the destination along with the correct settings. 
 
 
 ### Configuring the Console Alert

content/en/tutorial/setting_notification.md

@@ -67,4 +67,5 @@
    * [2.22](change_log/2.22.md)
    * [2.23](change_log/2.23.md)
    * [2.25](change_log/2.25.md)
+   * [2.26](change_log/2.26.md)
 

content/zh-CN/SUMMARY.md

@@ -0,0 +1,4 @@
+# 2018/08/23
+
+## 新功能
+1. 允许用户在 Trigger＆Action 中编写自定义的 HTTP 请求。当触发条件符合时，此请求将发送到指定的服务器。[更多详情](../tutorial/setting_notification)

content/zh-CN/change_log/2.26.md

@@ -1,5 +1,11 @@
 # MCS 更新日志总览
 
+## 2018/08/23
+
+### v2.26
+
+[允许用户在 Trigger＆Action 中编写自定义的 HTTP 请求。](./2.26)
+
 ## 2018/07/25
 
 ### v2.25

content/zh-CN/change_log/README.md

@@ -84,11 +84,13 @@
 
 ### 设置 Webhook 
 
-要使用 webhook 触发动作，您只需要在设定触发条件时，选择 webhook 作为触发动作，并且输入您欲收到此触发通知之网址。当触发条件成立时，MCS 会发送一个 HTTP 请求到您提供的网址。
+触发动作中的 webhook，让您可以自行组合一个 HTTP 的请求，并在触发条件成立后发送到指定的服务器。
+
+要使用此功能，您只需要在设定触发条件时，选择**webhook** 作为触发动作，并且指定服务器**网址**、**请求方法**、**HTTP 标头**与**请求内文**。此外，您也可以在网址、标头的值以及请求内文中使用系统预设的变数。（详细用法请参考后面章节）
 
 ![](../images/Trigger/img_trigger_08.png)
 
-当您选择 webhook 触发动作后，您可以使用测试按钮，来测试是否通知有被送出。送出之资讯包含 装置名称, device ID 和触发值。
+当您选择 webhook 触发动作后，您可以使用测试按钮，来测试此 HTTP 请求是否有正确的被送出。
 
 ### 设定网页警报