Meet Node.js:express (i)

Express is the official recommended framework for node. js.

　　Installation

NPM Install Express-g

"-G" in the command indicates global

Because the new version (4.x.x) Express commands are centralized into another plug-in, the Express-generator is also installed.

NPM Install Express-generator-g

version Check

Express-v  

　　Build an Express project

Express Project-name

You can see the installed directory in the computer tray

　　

Bin: Internal Command folder public: Put pictures, scripts, styles of folders (images, JS, CSS) Routes: Routing Folder views: Page folder app.js: Project portal, Equivalent to Index.phppackage.json in PHP: Project dependency Configuration and developer information

Open a app.js file in a project

Introduction module var Express = require (' Express '), var path = require (' path '), var favicon = require (' Serve-favicon '); var logger = requ IRE (' Morgan '); var cookieparser = require (' Cookie-parser '); var bodyparser = require (' Body-parser '); var routes = require ( './routes/index '); var users = require ('./routes/users '); var app = Express ();//view, template settings App.set (' Views ', Path.join (__ DirName, ' views '); App.set (' View engine ', ' jade ');//Uncomment after placing your Favicon In/public//app.use (Favicon ( Path.join (__dirname, ' public ', ' Favicon.ico ')); App.use (Logger (' dev ')); App.use (Bodyparser.json ()); App.use ( Bodyparser.urlencoded ({extended:false})); App.use (Cookieparser ()); App.use (Express.static (Path.join, ' Public ')); App.use ('/', routes); App.use ('/users ', users);//capture, handle 404 error App.use (function (req, res, next) {var err = new Er  Ror (' not Found ');  Err.status = 404; Next (err);}); /Development Environment error handling if (App.get (' env ') = = = ' Development ') {App.use (err, req, res, next) {Res.status (Err.status | | 500    ); Res.renDer (' Error ', {message:err.message, error:err}); });}  Error handling in the context of the product app.use (err, req, res, next) {Res.status (Err.status | | 500); Res.render (' error ', {message:err.message, error: {}}); /External Output interface module.exports = app;

Open Package.json File

{  "name": "Project-name",  "version": "0.0.0", "  private": True,  "scripts": {    "start": "Node./bin /www "  },  " dependencies ": {    " Body-parser ":" ~1.13.2 ",    " Cookie-parser ":" ~1.3.5 ",    " Debug ":" ~ 2.2.0 ",    " Express ":" ~4.13.1 ",    " Jade ":" ~1.11.0 ",    " Morgan ":" ~1.6.1 ",    " Serve-favicon ":" ~2.3.0 "  }}

Installing some of the development-assisted modules

　　Supervisor Automatically restarts each time the code is modified

Installing NPM install supervisor-g//calling supervisor App.js

Forever Process Management allows node service to not stop

Installing NPM install forever-g//call Forever start App.js

Meet Node.js:express (i)