プロジェクト作成とハローワールド
$mkdir linebot
$cd linebot
$npm init -y$npm i @line/bot-sdk express
$npm install dotenv --save$touch index.js $$ .env
$code .index.js
'use strict';constexpress=require('express');constline=require('@line/bot-sdk');constPORT=process.env.PORT||3000;constdotenv=require('dotenv')dotenv.config()constconfig={channelAccessToken:process.env.CHANNEL_ACCESS_TOKEN,channelSecret:process.env.CHANNEL_SECRET};constapp=express();app.get('/',(req,res)=>res.send('Hello（GET)'));app.post('/webhook',line.middleware(config),(req,res)=>{console.log(req.body.events);if(req.body.events[0].replyToken==='00000000000000000000000000000000'&&req.body.events[1].replyToken==='ffffffffffffffffffffffffffffffff'){res.send('Hello!(POST)');console.log('疎通確認用');return;}Promise.all(req.body.events.map(handleEvent)).then((result)=>res.json(result));});constclient=newline.Client(config);functionhandleEvent(event){if(event.type!=='message'||event.message.type!=='text'){returnPromise.resolve(null);}returnclient.replyMessage(event.replyToken,{type:'text',text:event.message.text});}app.listen(PORT);console.log(`Server running at ${PORT}`);.env.sample
CHANNEL_ACCESS_TOKEN = "xxxxxxxxxxxxxxxxxxx"
CHANNEL_SECRET = "xxxxxxxxxxxxxx"
BASE_URL = 'xxxxxxxxxxxxx.ngrok.io'
$ngrok http 3000
BASE_URLの書き換え
$node index.js
webhookURLの設定