Sample LINE Bot

server.js

// Based on https://line.github.io/line-bot-sdk-nodejs/getting-started/basic-usage.html#synopsis
// 做了一些修改讓同學們比較好理解

const express = require('express')
const line = require('@line/bot-sdk');
const app = express()
const port = 3000


const config = {
  channelAccessToken: 'YOUR_CHANNEL_ACCESS_TOKEN',
  channelSecret: 'YOUR_CHANNEL_SECRET'
}

const client = new line.messagingApi.MessagingApiClient({
  channelAccessToken: config.channelAccessToken
})

app.get('/', (req, res) => {
  res.send(`Hi ${req.query.name}!`)
})

app.post('/webhook', line.middleware(config), (req, res) => {
  // req.body.events 可能有很多個
  for (const event of req.body.events) {
    handleEvent(event)
  }

  // 回傳一個 OK 給呼叫的 server，這邊應該是回什麼都可以
  res.send("OK")
})

function handleEvent(event) {
  // 如果不是文字訊息，就跳出
  if (event.type !== 'message' || event.message.type !== 'text') {
    return
  }

  // 回覆一模一樣的訊息，多一個驚嘆號
  client.replyMessage({
    replyToken: event.replyToken,
    messages: [{
      type: 'text',
      text: `${event.message.text}!`
    }],
  })
}

app.listen(port, () => {
  console.log(`Sample LINE bot server listening on port ${port}...`)
})

// Based on https://line.github.io/line-bot-sdk-nodejs/getting-started/basic-usage.html#synopsis
// 使用 dotenv 來讀取 .env 裡的金鑰

const express = require('express')
const line = require('@line/bot-sdk');
const app = express()
const port = 3000
require('dotenv').config()


const config = {
  channelAccessToken: process.env.CHANNEL_ACCESS_TOKEN,
  channelSecret: process.env.CHANNEL_SECRET
}

const client = new line.messagingApi.MessagingApiClient({
  channelAccessToken: config.channelAccessToken
})

app.get('/', (req, res) => {
  res.send(`Hi ${req.query.name}!`)
})

app.post('/webhook', line.middleware(config), (req, res) => {
  // req.body.events 可能有很多個
  for (const event of req.body.events) {
    handleEvent(event)
  }

  // 回傳一個 OK 給呼叫的 server，這邊應該是回什麼都可以
  res.send("OK")
})

function handleEvent(event) {
  // 如果不是文字訊息，就跳出
  if (event.type !== 'message' || event.message.type !== 'text') {
    return
  }

  // 回覆一模一樣的訊息，多一個驚嘆號
  client.replyMessage({
    replyToken: event.replyToken,
    messages: [{
      type: 'text',
      text: `${event.message.text}!`
    }],
  })
}

app.listen(port, () => {
  console.log(`Sample LINE bot server listening on port ${port}...`)
})