Echo Line Bot
日期：2020/2/11
講者：王譽錚
Outline
- 申請line developer
- DNS、https、webhook
- Ngrok安裝與操作
- Line bot SDK
- 環境變數
- Echo bot
- 參考資源
申請line developer
1. 按下Providers > create 創立line bot
2. 選擇Create a message API channel
申請好後的畫面
DNS、https、webhook
DNS
https://www.google.com
8.8.8.8
DNS
Https
Webhook
收到訊息
回傳訊息
訂閱者
通知者
收到訊息
回傳訊息
Ngrok 安裝與操作
Line bot SDK
pipenv shell
pipenv install line_bot_sdk
安裝 line-bot-sdk
安裝完的結果
環境變數
建立一個檔案，取名為 .env
pipenv shell重啟pipenv 以載入環境變數
Echo bot
import os
from flask import Flask, request, abort
from linebot import (
LineBotApi, WebhookHandler
)
from linebot.exceptions import (
InvalidSignatureError
)
from linebot.models import (
MessageEvent, TextMessage, TextSendMessage,
)引入所有要用的套件
app = Flask(__name__)
line_bot_api = LineBotApi(os.environ.get('CHANNEL_ACCESS_TOKEN'))
handler = WebhookHandler(os.environ.get('CHANNEL_SECRET'))
@app.route("/callback", methods=['POST'])
def callback():
signature = request.headers['X-Line-Signature']
body = request.get_data(as_text=True)
app.logger.info("Request body: " + body)
try:
handler.handle(body, signature)
except InvalidSignatureError:
print("Invalid signature. Please check your channel access token/channel secret.")
abort(400)
return 'OK'
if __name__ == "__main__":
app.run()接收訊息
@handler.add(MessageEvent, message=TextMessage)
def handle_message(event):
line_bot_api.reply_message(
event.reply_token,
TextSendMessage(text=event.message.text))回傳訊息
import os
from flask import Flask, request, abort
from linebot import (
LineBotApi, WebhookHandler
)
from linebot.exceptions import (
InvalidSignatureError
)
from linebot.models import (
MessageEvent, TextMessage, TextSendMessage,
)
app = Flask(__name__)
line_bot_api = LineBotApi(os.environ.get('CHANNEL_ACCESS_TOKEN'))
handler = WebhookHandler(os.environ.get('CHANNEL_SECRET'))
@app.route("/callback", methods=['POST'])
def callback():
# get X-Line-Signature header value
signature = request.headers['X-Line-Signature']
# get request body as text
body = request.get_data(as_text=True)
app.logger.info("Request body: " + body)
# handle webhook body
try:
handler.handle(body, signature)
except InvalidSignatureError:
print("Invalid signature. Please check your channel access token/channel secret.")
abort(400)
return 'OK'
@handler.add(MessageEvent, message=TextMessage)
def handle_message(event):
line_bot_api.reply_message(
event.reply_token,
TextSendMessage(text=event.message.text))
if __name__ == "__main__":
app.run()完整程式碼
填寫 Webhook URL
確認設定
參考資源
郭佳甯(2017)。第四天：認識 Webhook。檢索自：https://ithelp.ithome.com.tw/articles/10193212
Penguin(2015)。Flask 使用日志紀錄到文件範例。檢索自：https://reurl.cc/rlmnz1
Augustin Wang(2017)。開發LINE聊天機器人不可不知的十件事。檢索自：https://engineering.linecorp.com/zh-hant/blog/line-device-10/