在Debian系统上分析Node.js应用程序的网络请求日志,可以通过以下几种方法和工具进行:
使用Morgan中间件记录HTTP请求日志:
npm install morganconst express = require('express'); const morgan = require('morgan'); const app = express(); // 使用morgan中间件,预定义格式为'tiny' app.use(morgan('tiny')); app.get('/', (req, res) => { res.send('Hello World!'); }); app.listen(3000, () => { console.log('Server is running on port 3000'); }); 自定义日志格式:
app.use(morgan('method url status res[content-length] - response-time ms')); 使用Koa中间件记录响应时间:
const Koa = require('koa'); const app = new Koa(); app.use(async (ctx, next) => { let stime = new Date().getTime(); // 记录当前时间戳 await next(); // 事件控制权中转 let etime = new Date().getTime(); // 所有中间件执行完成后记录当前时间 console.log(`请求地址: ${ctx.path} ,响应时间: ${etime - stime} ms`); }); app.use(async (ctx, next) => { console.log('中间件 doSomething'); await next(); console.log('中间件执行 over'); }); app.listen(3000, () => { console.log('server is running at http://localhost:3000'); }); 使用Winston记录日志:
const winston = require('winston'); const logger = winston.createLogger({ level: 'info', format: winston.format.json(), transports: [ new winston.transports.Console(), new winston.transports.File({ filename: 'error.log', level: 'error' }), new winston.transports.File({ filename: 'combined.log' }), ], }); app.use((req, res, next) => { const start = Date.now(); res.on('finish', () => { const responseTime = Date.now() - start; logger.info({ req: req.method, reqUrl: req.url, res: res.statusCode, responseTime: responseTime + ' ms' }); }); next(); }); 使用ELK(Elasticsearch, Logstash, Kibana)堆栈进行日志采集和分析:
使用Wireshark图形化工具分析网络数据包:
通过上述方法,可以有效地记录和分析Node.js应用中的网络请求日志,帮助开发者监控和优化应用性能。