Google Apps Script 實作 Webhook

接收到的下列內容，也就是doPost(e) 裡面的 e.postData.contents，但是收到的是字串，我們要先轉乘JSON 物件

其中 replyToken 及 text 是我們要取得的目標

{

  "destination": "xxxxxxxxxx",

  "events": [

    {

      "replyToken": "0f3779fba3b349968c5d07db31eab56f",

      "type": "message",

      "mode": "active",

      "timestamp": 1462629479859,

      "source": {

        "type": "user",

        "userId": "U4af4980629..."

      },

      "message": {

        "id": "325708",

        "type": "text",

        "text": "Hello, world"

      }

    },

    {

      "replyToken": "8cf9239d56244f4197887e939187e19e",

      "type": "follow",

      "mode": "active",

      "timestamp": 1462629479859,

      "source": {

        "type": "user",

        "userId": "U4af4980629..."

      }

    }

  ]

}

回覆(Reply)

所以我們也要傳送HTTP POST 的訊息給 LINE 伺服器

curl -v -X POST https://api.line.me/v2/bot/message/reply \

-H 'Content-Type: application/json' \

-H 'Authorization: Bearer {channel access token}' \

-d '{

    "replyToken":"nHuyWiB7yP5Zw52FIkcQobQuGDXCTA",

    "messages":[

        {

            "type":"text",

            "text":"Hello, user"

        },

        {

            "type":"text",

            "text":"May I help you?"

        }

    ]

}

var channelAccessToken = "";

function doPost(e) {

    var msg = JSON.parse(e.postData.contents);

    var replyToken =  msg.events[0].replyToken;//權杖

    var userMessage = msg.events[0].message.text;//訊息

    //回覆訊息

    var url = 'https://api.line.me/v2/bot/message/reply';

    UrlFetchApp.fetch(url, {

      'headers': {

        'Content-Type': 'application/json; charset=UTF-8',

        'Authorization': 'Bearer ' + channelAccessToken,

      },

      'method': 'post',

      'muteHttpExceptions' : true,

      'payload': JSON.stringify({

        'replyToken':  replyToken,

        'messages': [{type:'text',text:'你說了：' + userMessage}]

      }),

    }); 

    //使用者的ID

    var userId = msg.events[0].source && event.source.userId;    

    //推播訊息

    var url = 'https://api.line.me/v2/bot/message/push';

    UrlFetchApp.fetch(url, {

      'headers': {

        'Content-Type': 'application/json; charset=UTF-8',

        'Authorization': 'Bearer ' + channelAccessToken,

      },

      'method': 'post',

      'muteHttpExceptions' : true,

      'payload': JSON.stringify({

        'to':  userId,

        'messages': [{type:'text',text:'有人說了：' + userMessage}]

      }),

    }); 

}