Introducing time format library MomentJS

Install MomentJS

npm install moment --save

Simple format time

Use YYYY-MM-DD HH:MM:SS to represent year month day hour minute second (24-hour system)

 console.log(Moment().format('YYYY-MM-DD HH:MM:SS'));

output

2019-05-01 20:05:95 

Using Koa2 log Middleware

Install koa logger

npm install koa-logger --save

If you need to use ts, you need to install the TS type declaration

npm install @types/koa-logger --save

Simple use of KOA logger

const Koa = require("koa");                               
const Koa_Logger = require("koa-logger");                 // Log Middleware
const Koa_Router = require("koa-router");

// instantiation
const app = new Koa();                              
const logger = Koa_Logger();     
const router = new Koa_Router();

router.get("/",async (ctx)=>{
    ctx.body = "Hellow Koa";
});

// Using middleware     
app.use(logger);                                    // Log output

app.use(router.routes());                            // Route

// Start app
app.listen(3000);                                   // Set listening port
// Startup ID
console.log("Koa Run in: http://127.0.0.1:3000");  

Visit http://localhost:3000/ , page display

1

2

Add time to request log

Change the calling method of logger and add the time after the moment format

const Koa = require("koa");                               
const Koa_Logger = require("koa-logger");                 // Log Middleware
const Koa_Router = require("koa-router");
const Moment = require("moment");
// instantiation
const app = new Koa();                              
const logger = Koa_Logger((str) => {                // Using log Middleware
    console.log(Moment().format('YYYY-MM-DD HH:MM:SS')+str);
});     
const router = new Koa_Router();

router.get("/",async (ctx)=>{
    ctx.body = "Hellow Koa";
});

// Using middleware     
app.use(logger);                                    // Log output

app.use(router.routes());                            // Route

// Start app
app.listen(3000);                                   // Set listening port
// Startup ID
console.log("Koa Run in: http://127.0.0.1:3000");  

Separate visits http://localhost:3000/
,http://localhost:3000/?test
The console output is as follows

3

So we have a request log with time