這次帶給大家如何使用nodejs日誌模組winston,使用nodejs日誌模組winston的注意事項有哪些,以下就是實戰案例,一起來看一下。
winston 日誌模組
在使用 nodejs winston 模組中,加上相關的兩個模組,事倍功半。
express-winston
winston-daily-rotate-file
##express -winston
是express-winston 的winston 的增加版, 是作為express 的中間件來列印日誌,不僅有請求頭訊息,並且有回應時間。 作為中間件, 為什麼會有回應時間呢?因為 express-winston 改寫了 express 的 res.end 辦法, 是請求結束後再打的日誌。
var end = res.end; res.end = function(chunk, encoding) { res.responseTime = (new Date) - req._startTime; res.end = end; res.end(chunk, encoding); ... }express-winston 沒有修改或擴充winston 的transport,而winston-daily-rotate-file 正是增強了winston 的transport 辦法
#winston-daily-rotate-file
winston-daily-rotate-file 是winston 擴展, 增加了transport 的辦法,使winston 有滾動日誌的能力。結合使用
我們來一個需求: 如何讓express-winston 列印日誌的時候,也列印出介面/api 的請求參數和響應數據?
import winston from 'winston' import expressWinston from 'express-winston' import 'winston-daily-rotate-file' import path from 'path' export let DailyRotateFileTransport = (fileName) => { return new (winston.transports.DailyRotateFile)({ filename: path.join(process.env.LOGPATH, `${fileName}-%DATE%.log`), datePattern: 'YYYY-MM-DD-HH', // maxSize: '20m', maxFiles: '7d', timestamp: () => new Date().format('yyyy-MM-dd hh:mm:ss.S') }) } export let pageRequestLogger = expressWinston.logger({ transports: [ DailyRotateFileTransport('page-request') ], meta: true, // optional: control whether you want to log the meta data about the request (default to true) msg: 'HTTP {{req.method}} {{req.url}}', // optional: customize the default logging message. E.g. "{{res.statusCode}} {{req.method}} {{res.responseTime}}ms {{req.url}}" expressFormat: true, // Use the default Express/morgan request formatting. Enabling this will override any msg if true. Will only output colors with colorize set to true colorize: false, // Color the text and status code, using the Express/morgan color palette (text: gray, status: default green, 3XX cyan, 4XX yellow, 5XX red). ignoreRoute: function (req, res) { // 只打印页面请求信息 let notPageRequest = false let ignoreArr = ['/api', '.js', '.css', '.png', '.jpg', '.gif'] ignoreArr.forEach(item => { if (req.url.indexOf(item) > -1) notPageRequest = true }) return notPageRequest } // optional: allows to skip some log messages based on request and/or response }) export let apiRequestLogger = (req, res, next) => { let send = res.send let content = '' let query = req.query || {} let body = req.body || {} res.send = function () { content = arguments[0] send.apply(res, arguments) } expressWinston.logger({ transports: [ DailyRotateFileTransport('api-request') ], meta: true, // optional: control whether you want to log the meta data about the request (default to true) msg () { return `HTTP ${req.method} ${req.url} query ${JSON.stringify(query)} body ${JSON.stringify(body)} resData ${content} ` }, colorize: true, // Color the text and status code, using the Express/morgan color palette (text: gray, status: default green, 3XX cyan, 4XX yellow, 5XX red). ignoreRoute: function (req, res) { if (req.headers.self) return true return false } // optional: allows to skip some log messages based on request and/or response })(req, res, next) }相信看了本文案例你已經掌握了方法,更多精彩請關注php中文網其它相關文章! 推薦閱讀:
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