Nodejs uses express to obtain get and post values and the session verification method, nodejsexpress

Nodejs uses express to obtain get and post values and the session verification method, nodejsexpress

This article describes how nodejs uses express to obtain get and post values and verify the session. We will share this with you for your reference. The details are as follows:

Get and post values

The get value is put into an object.

req.query

The post value is put in

req.body

Obtain the object content in the same way. For example, if a value of id is input, you can obtain the req. body. id from nodejs.

Express session Verification

Step 1 install the cookie and session modules and introduce

var session = require('express-session');var cookieParser = require('cookie-parser');

Part 2: express Application cookie and session

App. use (cookieParser (); app. use (session ({resave: true, // don't save session if unmodified saveUninitialized: false, // don't create session until something stored secret: 'admin ', // key name: 'testapp', // The name here is the cookie name. The default cookie name is connect. sid cookie: {maxAge: 80000} // set maxAge to 80000 ms, that is, the session and the corresponding cookie expire after 80 s }));

Step 3: intercept and process requests

App. use (function (req, res, next) {if (! Req. session. user) {if (req. url = "/login") {next (); // if the requested address is a logon address, the next request is sent.} else {res. redirect ('/login'); // jump to the logon page} else if (req. session. user) {next (); // if you have logged on, you can enter }});

If you do not log on to the access page, the route is automatically directed to the/login page. The last step is to process the route

App. get ('/login', function (req, res) {res. render ("login") ;}); app. post ('/login', function (req, res) {if (req. body) {// The value var user = {'username': req. body. username // get the username and assign a value. You can make your own judgment here}; req. session. user = user; // assign a value to the session to automatically jump to the page res. redirect ('/admin');} else {res. redirect ('/login') ;}}); app. get ('/logout', function (req, res) {// do the logout page req. session. user = null; res. redirect ('/login ');});

I hope this article will help you design nodejs programs.