Fast development and easy to scale, high performance and robust. The advent of node. JS makes these dreams of all Web application developers a reality. However, like other new development language technologies, writing code from scratch using the most basic features of node. JS
Fast development and easy to scale, high performance and robust. The advent of node. JS makes these dreams of all Web application developers a reality. However, like other new development language technologies, writing code from scratch using the most basic features of node. JS
for sending messages to the server.Use socket. io and nodejs to build a websocket Server
Socket. io can not only build the websocket service of the client, but also support the websocket of the nodejs server.Install socket. io in nodejs
Use the node plug-in management package and run the following command to install socket. io successfully.
Npm install socket. io
If there is no npm or windows users can use github to download socket. io and put it
Code management is a very important part of a software application development process, and many programmers need efficient code editing and debugging tools to do their work more accurately and quickly, which may be why there is an IDE (integrated development environment). An IDE has a source code editor, code debugger, code completion function, build automation tools, and compilers in a single software applicatio
Today, almost all Web services or integrations are done at the node. JS Runtime. node. JS is a flexible platform with a lot of community support. We can even create Xlsx,docx or PDF documents directly from node. js. All major clou
CaseLet's set the goal to a simple point, but it's practical enough:
Users can use our app through a browser.
When the user requests Http://domain/start , you can see a welcome page with a file upload form on the page.
The user can select a picture and submit the form, and then the file will be uploaded to http://domain/upload, which will display the image on the page when the page is uploaded.
Almost, you can now go to Google, find something to mess around to complete the
attributes:Firstchild,lastchild,nextsibling,previoussibling is supported under IESupported under Chrome and FF: firstelementchild,lastelementchild,nextelementsibling,previouselementsiblingIf compatibility is required, we can use short-circuit expressions:1Window.onload =function(){2 varAdiv = document.getElementsByTagName ("div" );3(adiv[2].previouselementsibling | | adiv[2].previoussibling). Style.color = ' Red ';4(adiv[1].nextelementsibling | | adiv[1].nextsibling). Style.color =
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 abstract two times the features that are already i
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
Bearcat is a POJOs-based application-layer framework developed by NetEase, Bearcat provides a lightweight container to write simple, maintainable node. js. Bearcat provides a basic underlying to manage application logic objects, allowing developers to focus on the logic of the appl
The project background is a php application. To add the instant push function, port 8888 is written in node. js to push instant messages and socket. io is used for data transmission. How can I establish a socket connection between Port 80 and port 8888 on the application page? Node
File System ModuleFile I/O is encapsulated by standard POSIX functions and requires access to the module using the Require (' FS ')All of these methods provide both asynchronous and synchronous approaches.1. Renaming filesvar base_dir = __dirname; Copied. 2. modify file permissions and file permission properties 3. Get file meta information 4. Read file dataFs.realfile (Path,[callback])5. Verify that the file existsFs.exists (Path,[callback])6. deleting filesFs.unlink (Path,[callback])The cal
Encapsulate ReadFile as a method (to solve asynchronous Problems)Cause: because Node. JS is non-blocking i/o, It is asynchronous, the read file is an I/O request, so it is thrown, and all NON-I/O requests are completed before they are madeCode with Async problem:var fs = require ("fs"); function fnreadfile (file) { function(err, data) { return data; }); Console.log (fnreadfile ("hei.txt")); //
Using Webstrom can easily debug the Node applcation.For example, we had an node+express application.Server.js:/**/' use strict '; var expres = require (' Express '); var app = expres (); App.get (function(request, Response) { response.send (200 , "Hello World"); App.listen (3000);All it does just send back a "Hello world" string.What we want are to see how to use Webstrom to debug this server.js and get
Chat Room Web application-Ajax application, chat room web-ajax
In the last two days, I am working on a simple chat room program involving jquery's Ajax refreshing page, php connection to the mysql database, simple mysql operations, and the differences between mysql and mysql
This article mainly introduces what is Node. js? What are the advantages of Node. js ?, To try to explain what Node is. js, this article will briefly introduce some background information: the problem to be solved, how it works, h
Static resource ManagementIn the HTML page. The CSS file generates an HTTP request to get the CSS file resource, issuing the request URL, butThere is no information for this resource to play with. css files. As the server side does not know that the resource requested by the client is a. css file,The server side has no logic to handle/XX.CSS requests. Therefore does not respond normally to return a XX.CSS data.The same problem is with JavaScript files and pictures. Loading pictures and CSS styl
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