# 鸚鵡 Line Bot

###### tags: `Line Bot 簡易上手教學`
{%hackmd S1DMFioCO %}

* 先重新建立一隻Line Bot

* 在Basic Setting 找到 Channel secret

* Messaging API settings 的 Channel access token

## 安裝 Line Bot SDK

pip install line-bot-sdk==1.18.0

* 使用Flask建立網站

from flask import Flask

app = Flask(__name__)

from flask import request, abort
from linebot import LineBotApi, WebhookHandler
from linebot.exceptions import InvalidSignatureError
from linebot.models import MessageEvent, TextMessage, TextSendMessage
import json



with open('line_bot.json', "r", encoding = 'utf8') as data:
    jsondata = json.load(data)

line_bot_api = LineBotApi(jsondata["Channel_access_token"])
handler = WebhookHandler(jsondata["Channel_secret"])

#檢查路由，確認資料是否正確
@app.route('/callback', methods = ['POST'])
def callback():
    signature = request.headers['X_Line_Signature']
    body = request.get_data(as_text = True)
    
    try:
        handler.handle(body, signature)
    except InvalidSignatureError:
        abort(400)
    return 'OK'

#回傳
@handler.add(MessageEvent, message = TextMessage)
def handler_message(event):
    line_bot_api.reply_message(event.reply_token, TextSendMessage(text = event.message.text))
    
if __name__ == '__main__':
    app.run(debug = True)

* json

{
    "Channel_access_token":"你的Channel_access_token",
    "Channel_secret":"你的Channel_secret"
}

## 使用ngrok建立https伺服器

* [下載](https://ngrok.com/download)

* 解壓縮後丟進資料夾

* 啟動伺服器

ngrok http 埠位號碼

* 切換到當前資料夾

ngrok http 5000

* 複製最長的那部分的網址

* 到Message API

* 輸入

https://{剛剛複製的網址}/callback

* npdate，即啟用
* 重設

# ngrok伺服器重新啟動後，就必須修改一次Webhook URL的值

* 修正

* Line Bot 實際畫面