This article mainly introduces the use of Node. the js + Koa framework implements the frontend-to-backend interaction method. This article describes the methods in detail and has some reference value for everyone. If you need them, let's study them together.
Preface
For a front-end engineer, not only the pre-meeting content, but also the backend technology need
Twisted is a powerful asynchronous network framework with a wide range of applications, but the node. JS fire, which has not been present for several years, is rarely a poor community or document.I think the two are essentially the same, and Python is easier to use.Anonymous userBecause, it gives a large part of the program ape illusion such as the front and back
the database level, the role of blockchain is to store transaction data. So where do you put the logic to vote for the candidate, or to retrieve the results of the poll? In the Ethereum world, you can use Solidity language to write business logic/application code (i.e. contract: Contract ), then compile the contract code into Ethereum bytecode and deploy the bytecode to the blockchain:Writing contract code can also be used in other languages, though? Solidity Is by far the most popular choice.E
Express is on the basis of node. JS, the development of a concise and practical framework structure, the use of this thing, we can more easily handle a lot of things. Just get started, it's a Beethoven! There are several ways to install Express in general. First, use NPM installation, cmd input NPM install EXPRESS-G, this-G is a global installation, that is insta
node. JS Framework Strongloop Learning notes (i)
I am using node. js to do the phone backstage, find the framework found Strongloop quite suitable, but found no Chinese tutorial, so in their own study, do a note, to facil
I plan to position my backend framework as a website construction framework. This article provides some of my ideas and preliminary practices. If you have a master who has worked on the back-end framework (no language restrictions) in the garden, please advise. The following is a rough process.
The back-end Core File mass.
A typical web project includes a server-side programming language. There are usually one or more frameworks based on this language. The front end uses JavaScript, and there is also a database and database language, such as SQL. To build such a project, you need to learn many technologies and integrate them. It's no wonder that many developers get bored before "Hello World" is running.
More and more Tool developers are aware of this problem and try to solve it by providing a complete web solut
1. Install node. js
It is easier to deploy node. js on the Windows platform. From 0.6.1, node. js can be directly installed on the Windows platform through the. Mis file.
Http://nodejs.org/#download the latest version is
What is Express.jsExpress is a simple and flexible node. JS Web application framework that provides a range of powerful features to help you create Web applications, provide rich HTTP tools, and take-out middleware from the Connect framework, creating robust, friendly APIs that are fast and easy, Express does not abstr
-------------------> API logic Processing layer, generally is the curd of data and other operationsControllers--------> C End Site, nothing to sayJobs-----------------> Timed tasks, combined with Node-scheduleLogs-----------------> file logModels------------> Mongoose Database links and individual entity definitionsProxy--------------> Database access method encapsulation, such as INSERT, updateUtil------------------> Tools
650) this.width=650; "src=" http://blog.fens.me/wp-content/uploads/2015/02/express4.png "width=" "height=" 400 " alt= "express4.png"/>ObjectiveNodejs is a young programming framework that is full of vitality and passion, and has been kept up to date with rapid Updates. The official web Development Library express, based on nodejs, is also developing in sync, upgrading a large version every year, and even doing major surgery on the bottom of the
Setupapp.set(' views ', ' views ') ) ); app. Set ('view engine'Jade');Then replace this code with aApp.set('views '); App.engine ( ' HTML ' , ejs.__express); app. Set ('view engine'html');Then change the name of the Jade suffix in the view to HTML.Then install the Ejs module in the project directoryCNPM Install--save EjsThen enter NPM start to start the projectOf course it is best to install supervisor so that you do not need to restart the project every time the project has changed, install th
CMDFirst enter SERVERCD server//and then under node run the Bin folder under the WWW file node bin/wwwOpen the browser, enter localhost:3000, see, it means that the express service started successfully.4) Replace the Jade engine with HTMLNote that under the View folder, there are three. Jade type files, express using the Jade engine by default (or recommend that you use Jade,jade syntax or very simple and
(server for authentication timeout)" Content ": ' 2222 '//need to transfer print Content data});Koahub.js--node. JS Web Rapid development framework based on Koa.js platformOfficial website: http://js.koahub.comComponent 4:koahub-handlebarsKoahub-handlebarsKoahub Handlebars TemplatesInstallation$ NPM Install Koahub-handlebarsUse with KOAvar koa = require (' KOA '
Installation of the node. JS Framework ExpressFirst assume that you have node. js installed, then create a directory for your app, and then go to this directory and use it as your current working directory.$ mkdir myapp$ cd myappnpm initCreate a file for your app with the co
Web AppsExpress is a minimalist, flexible Web application Development framework based on the node. JS platform that provides a range of powerful features to help you create a wide variety of web and mobile device applications.ApiRich HTTP shortcuts and any combination of Connect middleware make it fast and easy to create robust, friendly APIs.PerformanceExpress d
given request, ithe middleware would not run. The function'll has access to Koa ' s context viathis
useOriginalUrlIt should are true or false , default is true . If False, would path match against ctx.url instead of ctx.originalUrl .
ExamplesRequire authentication for every request skip the path is index.html.App.Use(Requiresauth(). Skip ( {path:[/index.html ' , / ' ] }) ) Avoid a fstat for request to routes doesnt end with a given extension.app. Use(static. Skip(function () {
The content source of this page is from Internet, which doesn't represent Alibaba Cloud's opinion;
products and services mentioned on that page don't have any relationship with Alibaba Cloud. If the
content of the page makes you feel confusing, please write us an email, we will handle the problem
within 5 days after receiving your email.
If you find any instances of plagiarism from the community, please send an email to:
info-contact@alibabacloud.com
and provide relevant evidence. A staff member will contact you within 5 working days.