node 自定义日志

nodejs自定义日志

安装依赖package.json配置使用安装依赖

安装依赖

安装 nodemon 与cross-env cnpm i nodemon cross-env --save-dev

package.json配置

`.添加dev与 prd配置 “dev”: “cross-env NODE_ENV=dev nodemon node ./bin/www”, “prd”: “cross-env NODE_ENV=production nodemon node ./bin/www”

{ "name": "node0517", "version": "0.0.0", "private": true, "scripts": { "start": "node ./bin/www", "dev": "cross-env NODE_ENV=dev nodemon node ./bin/www", "prd": "cross-env NODE_ENV=production nodemon node ./bin/www" }, "dependencies": { "cookie-parser": "~1.4.4", "debug": "~2.6.9", "express": "~4.16.1", "http-errors": "~1.6.3", "jade": "~1.11.0", "moment": "^2.24.0", "morgan": "~1.9.1", "mysql2": "^1.6.5", "sequelize": "^5.8.6" }, "devDependencies": { "cross-env": "^5.2.0", "nodemon": "^1.19.0" } }

使用

app.js 配置, 使用morgan，可以在npm上查看

let logger = require('morgan'); const ENV = process.env.NODE_ENV if (ENV !== 'production') { // 开发环境 app.use(logger('dev')) } else { // 生产环境，写入日志 const logFileName = path.join(__dirname, 'logs', 'logger.log') const writeStream = fs.createWriteStream(logFileName, { flags: 'a' }) app.use(logger('combined', { stream: writeStream })) }

安装依赖

使用 npm run dev （开发环境，控制台输出日志） npm run prd （生产环境，会写入日志）