var end = res.end;res.end = function(chunk, encoding) { res.responseTime = (new Date) - req._startTime; res.end = end; res.end(chunk, encoding); ... }

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) { // 只打印頁面請求信息 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)}