【Node.js实战】一文带你开发博客项目之Express重构（博客的增删查改、morgan写日志）

const { ErrorModel } = require('../model/resModel')

module.exports = (req, res, next) => {
    // 已经登录
    if (req.session.username) {
        next()
        return
    }

    res.json(
        new ErrorModel('未登录')
    )
}

var express = require('express');
var router = express.Router();
// 导入博客和用户控制器相关内容
const {
  getList,
  getDetail,
  newBlog,
  updateBlog,
  delBlog
} = require('../controller/blog')
// 导入成功和失败的模型
const {
  SuccessModel,
  ErrorModel
} = require('../model/resModel')

const loginCheck = require('../middleware/loginCheck')

// 博客列表
router.get('/list', (req, res, next) => {
  // 博客的作者，req.query 用在 GET 请求中
  let author = req.query.author || ''
  // 博客的关键字
  const keyword = req.query.keyword || ''

  if (req.query.isadmin) {
    // 管理员界面
    if (req.session.username == null) {
      // 未登录
      res.json(
        new ErrorModel('未登录')
      )
      return
    }
    // 强制查询自己的博客
    author = req.session.username
  }

  // 查询的结果
  const result = getList(author, keyword)
  return result.then(listData => {
    res.json(
      new SuccessModel(listData)
    )
  })
});

// 博客详情
router.get('/detail', (req, res, next) => {
  const result = getDetail(req.query.id)
  return result.then(data => {
    res.json(
      new SuccessModel(data)
    )
  })
});

// 新增博客 loginCheck 作为中间件
router.post('/new', loginCheck, (req, res, next) => {
  req.body.author = req.session.username
  const result = newBlog(req.body)
  return result.then(data => {
    res.json(
      new SuccessModel(data)
    )
  })
})

// 更新博客
router.post('/update', loginCheck, (req, res, next) => {
  const result = updateBlog(req.query.id, req.body)
  return result.then(val => {
    if (val) {
      res.json(
        new SuccessModel()
      )
    } else {
      res.json(
        new ErrorModel('更新博客失败')
      )
    }
  })
})

// 删除博客
router.post('/del', loginCheck, (req, res, next) => {
  const author = req.session.username
  const result = delBlog(req.query.id, author)
  return result.then(val => {
    if (val) {
      res.json(
        new SuccessModel()
      )
    } else {
      res.json(
        new ErrorModel('删除博客失败')
      )
    }
  })
})

module.exports = router;

  "scripts": {
    "start": "node ./bin/www",
    "dev": "cross-env NODE_ENV=dev nodemon ./bin/www",
    "prd": "cross-env NODE_ENV=production nodemon ./bin/www"
  },

var path = require('path');
var fs = require('fs');
......
const ENV = process.env.NODE_ENV
if (ENV !== 'production') {
  // 开发环境 / 测试环境
  app.use(logger('dev'))
} else {
  // 线上环境使用 combined（写入文件）
  const logFileName = path.join(__dirname, 'logs', 'access.log')
  const writeStream = fs.createWriteStream(logFileName, {
    flags: 'a'
  })
  app.use(logger('combined', {
    stream: writeStream
  }));
}