Node cookie and Session usage

Import module in App.js

Require (' connect ');

Join before routing the distribution statement.

1app.use (Bodyparser.json ()); 2 app.use (bodyparser.urlencoded ()); Span style= "color: #008080;" >3 app.use (Cookieparser ()); 4 app.use (connect.session ({secret:  ' lgphp ', cookie: {maxAge: 20000}}); //session The duration is 20 seconds, this is in milliseconds, so we set up a session, which is a global setting < Span class= "number" >5 routes (app);             

First say session, set the session KV

Req.session.sessname = ' I am a sesion ';

So we set up a session variable named Sessname, the value is Iam a sesion, the session duration is 20 seconds. Typing on Ubuntu is still not very flexible

Get session

Res.Send (' session: ' + req.session.sessname) 

Delete session

Req.session.destroy ();

Determine if the session exists

if (req.session) {   // Determine if session is destroyed 

The above session operation is enough to complete the usual logic.

The following is a cookie, which we often use.

Set cookies

1   res.cookie (' cookiename ',20000,httponly:True, Path:'/'});  cooike      Duration (sec)

Get the value of a cookie

var c = req.cookies.cookiename   // This is a Dictionary object, you can use parentheses to get 

Delete cookies, many online, but it seems to be useless, some have set the expiration time to 0, I tried, the value of the cookie is not, but the cookie is still in, with Chrome to see there.

Res.cookie (' cookiename ', ' null ', {maxage:0});

There's no problem with deleting it.

Determine if a cookie exists, such as login and permission verification. After the cookie expires, it becomes a undefined, so we judge

if (' undefined ' = = = = (typeof Req.cookies.cookiename)) {res.send (' deleted cookie ');}   

Node cookie and Session usage