app.js

require('dotenv').config()

import createError from 'http-errors'
import express from 'express'
import cookieParser from 'cookie-parser'
import morgan from 'morgan'
import moment from 'moment'
import response from './utils/response'
import v1Route from './routes/v1'

// jwt 토큰 middleware
import jwtMiddleware from './middlewares/jwt.middleware'
import { logger, stream } from './configs/winston'

const app = express()

app.use(morgan('combined', { stream }))
app.use(express.json())
app.use(
  express.urlencoded({
    extended: false
  })
)
app.use(cookieParser())

// 컨트롤러를 타기 전에 jwt 로부터 user 를 조회
app.use(jwtMiddleware)

app.use('/v1', v1Route)

// catch 404 and forward to error handler
app.use((req, res, next) => {
  next(createError(500))
})

if (process.env.NODE_ENV === 'production') {
  // 에러 핸들링 전 Sentry 로 캡쳐
  const sentry = require('@sentry/node')
  sentry.init({ dsn: process.env.SENTRY_DSN })
  app.use(sentry.Handlers.errorHandler())

  const { IncomingWebhook } = require('@slack/client')
  const webhook = new IncomingWebhook(process.env.SLACK_WEBHOOK)
  webhook.send({
    'attachments': [
      {
        'color': '#ff0000',
        'text': '에러 발생!!! 출근하라!!!',
        'fields': [
          {
            'title': err.message,
            'value': err.stack,
            'short': false
          }
        ],
        'ts': moment().unix()
      }
    ]
  }, (err, res) => {
    // 심지어 여기서도 에러가...?
    if (err) {
      sentry.captureException(err)
    }
  })
}

// error handler
app.use((err, req, res, next) => {
  let apiError = err

  if (!err.status) {
    apiError = createError(err)
  }

  if (process.env.NODE_ENV === 'production' && apiError.status > 499) {
    const errObj = {
      req: {
        headers: req.headers,
        query: req.query,
        body: req.body,
        route: req.route
      },
      error: {
        message: apiError.message,
        stack: apiError.stack,
        status: apiError.status
      },
      user: req.user
    }

    logger.error(`${moment().format('YYYY-MM-DD HH:mm:ss')}`, errObj)
  } else {
    res.locals.message = apiError.message
    res.locals.error = apiError
  }

  // render the error page
  return response(
    res,
    {
      message: apiError.message
    },
    apiError.status
  )
})

// bin/www 를 그대로 사용하기 위해서 예외적으로 commonJs 문법을 적용
module.exports = app