Express how to log and write files

1, the use of Express self-band module

var logFile = Fs.createwritestream ('./apkanalysis.log ', {
    "flags": "A"
});
App.configure (function () {
  App.use (Express.logger ({stream:logfile}));
};

This code is added to the app.js, but I found a problem, this log it only records other client access to the server information, the following figure is I use chrom access to my server

2. Use Winston module before using it, we have to install it in the project first: first go to the project folder, then NPM install Winston
Here we can quote it, I was introduced in the App.js:

var winston=require (' Winston ');
var logger = new (Winston. Logger) ({
    transports: [
        New (Winston.transports.Console) (),
        New (Winston.transports.File) ({ 
            FileName: './apkanalysis.log ',
            timestamp: ' True ', 
            maxsize:10485760,//log file size
            maxfiles:10}
    ]});

when we need to log files, we can write this: logger.log (' info ', ' Test logmessage ', {anything: ' This is metadata '});
when we runapp.js, we'll be there. ApkAnalysis.log See the following figure:

to make it easier for me to create a new config folder under the project directory, and then create a new file in the Config folder//logger.js

var winston=require (' Winston ');

var logger = new (Winston. Logger) ({
    transports: [
        New (Winston.transports.Console) (),
        New (Winston.transports.File) ({
            FileName: './apkanalysis.log ',
            timestamp: ' True ',
            maxsize:10485760,
            maxfiles:10}
    ]});

Exports.logger=logger;

It is convenient to call it later in other JS files, such as I call it in App.js, I will introduce it first: var logs=require ('./config/logger.js '); It's handy when you use it: logs.logger.log (' info ', "Express server Listeningon Port 3000");