Nodejs&express+mongodb Complete Simple user login (i.e. Nodejs Getting started)

Source: Internet
Author: User
Tags mongodb support

Just understand Nodejs, found that Nodejs configuration is not complex, but there are a lot of places to pay attention to, today on record, later can also take out to see.

To complete this simple example, start from scratch and walk three steps.

I. Building a development environment

Two. Create a project (Express)

Three. Encoding

I belong to the technical class, no more nonsense.

I. Building a development environment

  1. Nodejs

    1.1 Installation

To the official website download the latest version of, after downloading, install, all the way next

1.2 Configuring Path

Configure the above installed directory to the environment variable to make it easy to use Node.exe in the command line later.

For example my node.exe in "H:\Program Files\nodejs\node.exe", at the beginning of the environment variable with "H:\Program files\nodejs\;"

  2. MongoDB

    2.1 Installation download, recommended download zip version, the development of the time, do not need to install, direct decompression can be used.

    2.2 Start MongoDB using the command line method,

>mongod D:\mongodb\dbone//d:\mongodb\dbone MongoDB and Dbone folders to be set up first, in addition, the value of the--dbpath parameter can not be Space

Two. Create a project (Express)

1 Installing the global plug-in

    >NMP Install-g Express          //Automatic Download Express plugin

    >nmp install-g express-generator    //express tools in the command line

  2. Add a Project

>EXPRESS-E MyProject

>CD MyProject

>NPM Install//Let NPM automatically download dependent packages based on Package.json

>NPM Install MONGO && NPM install Express-mongo//download MongoDB support Package


Three. Encoding

1. Modifying template rules

In App.js


App.set (' View engine ', ' Ejs ');

    Modified to:

App.engine (' HTML ', require (' Ejs '). __express); App.set (' view engine ', ' html ');

Change the file suffix in/views/to *.html

 2: Add a page (also called a view)

index.html Click "Login" to jump to login.html, log in work, jump to welcome.html, after welcome.html Click Logout to jump to login.html


<!DOCTYPE HTML><HTML>  <Head>    <title><%=title%></title>    <Linkrel= ' stylesheet 'href= '/stylesheets/style.css '/>  </Head>  <Body>    <H1><%=title%></H1>    <formMethod= "POST">User name:<inputtype= "text"name= "userid"ID= "userid"/><BR/>Password:<inputtype= "Password"name= "Password"ID= "Password"/><BR/>        <inputtype= "Submit"value= "Login"/>        <inputtype= "Reset"value= "Reset"/>    </form>  </Body></HTML>


<!DOCTYPE HTML><HTML>  <Head>    <title><%=title%></title>    <Linkrel= ' stylesheet 'href= '/stylesheets/style.css '/>  </Head>  <Body>    <H1><%=title%></H1>    <P>Welcome to:<%=userid%></P>    <H1><ahref= "/logout">Cancellation</a></H1>  </Body></HTML>


<!DOCTYPE HTML><HTML>  <Head>    <title><%=title%></title>    <Linkrel= ' stylesheet 'href= '/stylesheets/style.css '/>  </Head>  <Body>    <H1><%=title%></H1>    <P>Welcome to<%=title%></P>    <H1><ahref= "/login">Login</a></H1>  </Body></HTML>

  3. Add model


var mongo = require (' Mongoose '); var Schema = MONGO. Schema; var New Schema ({    userid:string,    name:string,    = Mongo.model (' User ', userschema);

4. Modifying routes


varExpress = require (' Express ');varRouter =Express. Router ();varMONGO = require (' Mongoose ');//varModels = require ('./models ');//Introducing ModelvarUser =models. User;mongo.connect (' Mongodb:// ');//connecting to a database/*GET home page.*/Router.get (‘/‘,function(req, res) {Res.render (' Index ', {title: ' Express ' });}); Router.get ('/login ',function(req, res) {//go to login pageRes.render (' login ', {title: ' Login ' });}); ('/login ',function(req, res) {//Handling Logon Requests    varQuery_doc ={userid:req.body.userid, password:req.body.password}; User.count (Query_doc,function(err, doc) {if(doc = = 1) {//verify success, go to welcome pageRes.redirect ('/welcome?userid= ' +Query_doc.userid); }Else{res.redirect ('/login ');    }            }); }); Router.get ('/logout ',function(req, res) {//logout, go to login pageRes.redirect ('/login ');}); Router.get ('/welcome ',function(req, res) {//Welcome Page    varUserID =Req.query.userid; Res.render (' Welcome ', {title: ', Userid:userid}); Module.exports= Router;

5. Running

5.1. Start App.js

    >node app

5.2 Accessing Http://localhost:3000/in a browser


1. Project if you want to support Chinese, the file encoding to use Utf-8, otherwise garbled

2. If you modify the source file, you want to see the effect immediately, we recommend installing the plugin Supervisor

>NPM install-g Supervisor//npm Auto-Download plugin

>supervisor app//install plugin to start website (formerly node app)

3. If the configuration is unsuccessful, the individual can provide remote assistance.

3.1 Teamview: [Email protected]

3.2 QQ: [email protected]

Validation message: Nodejs+mongodb

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Nodejs&express+mongodb Complete Simple user login (i.e. Nodejs Getting started)

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