node js use cases

1. Prepare a folder for the project2. Create a server.js file under the root directory3. The file code is as followsvar http = require ("http");Http.createserver (function (request,response) {Response.writehead (200,{' content-type ': ' Text/plain ');Response.End ("Hello world\n")}). Listen (8080);Console.log ("Server running at http://127.0.0.1:8080/")4. Open the project directory with the command line execute the node server.js command5. Open the co

Original link: https://cnodejs.org/topic/4f9904f9407edba21468f31eThis is also on-line search, personally tried, very useful!Image use Method (three ways any one can solve the problem, we recommend the use of a third, the configuration is dead, the next time the configuration is still in):1. Through the config commandnpm config set registry https://registry.npm.taobao.org npm info underscore （如果上面配置正确这个命令会有字

("foobared"); //Select the database, use the set structureClient.select (' 0 ',function(Error) {if(Error) {Console.log (error); } Else { //SetClient.set (' str_key_0 ', ' 0 ',function(Error, res) {if(Error) {Console.log (error); } Else{console.log (res); } }); } }); //Use hash structureClient.hmset ("Nodejs", "zzl01", "OK",function(Error, res) {if(Error

is triggered when an error occurs in the upload stream, and when an error occurs, if you want to continue triggering the requestData event, you must manually call the Request.resume () method) Form.on (' aborted ', function () {});This event is triggered when the user aborts the request, and the timeout and close events in the socket also trigger theForm.on (' End ', function () {}), when the event is triggered, the error event will also be triggered.When all the requests have been received and

Previously used forever process daemon logging to the specified file, but can only be saved to a file can not be fragmented, so that only log files are getting larger,Forever Start-s-L/forever.log app.js-L output to log-S log AppendThe Shard storage log can be implemented using LOG4JS firstNPM Install Log4jsPackage Log4jsLogger.jsvar log4js = require ("Log4js");Log4js.configure ({Appenders: [{Type: ' Console '},{Type: ' Datefile ',FileName: ' Public/logs/console-info.log ',Pattern: "-yyyy-mm-dd"

1.NPM InitInitialize Package.json2.npm Install download dependencynpm install MySQLTo download a dependency package via NPM:3.npm Install dependent--savedownload dependencies such as MySQL download databaseadd the corresponding dependency in the Package.jsonAdd the Dependencies object4.npm Install dependent--save-devdownload and develop dependencies via NPMAdd to Devdependencies object5 NPM Install dependent-Gnpm Install gulp-gnpm Install nrm-gCLI command-line toolsGlobal installation: Generally

var request = require (' request ') var url = ' Http://www.baidu.com/home/xman/data/superload ' var cookie = ' Cookie after you log in to Baidu ' var options = { method: "GET", Url:url, QS: { "type": "Weather", "Asyn": 1, "T": New Date (). GetTime () }, headers: { ' user-agent ': ' mozilla/5.0 (Windows NT 6.3; WOW64; rv:34.0) gecko/20100101 firefox/34.0 ', ' cookie ': Cookie }};function Callback (Error, response, body) { if (!error Respons

This article mainly introduces node. js uses nodemailer to send emails. In this example, QQ mail is used. You can also change it to another email address, such as 163 or gmail. For more information, see 1. Install nodemailer The Code is as follows: Npm install nodemailer -- save Ii. Call The Code is as follows: Var nodemailer = require ("nodemailer "); // Enable an SMTP connection poolVar smtpTransport =

Installation of 1.node.jsWindows platform:Windows X64:current version:v4.1.0 https://nodejs.org/en/Note: (The new. msi installer already contains NPM by default)2.node.js Modules installation (The following are common modules)Cli-color Https://www.npmjs.com/package/cli-colorinstallation command:npm install cli-colorEvents Https://www.npmjs.com/package/eventsinstallation command:NPM Install EventsExpress Https://www.npmjs.com/package/expressinstallation command:NPM Install ExpressLog4js Https://w

Typical use cases of MySQL MHA and typical use cases of mysqlmha1 Management node deployment location 1.1. Dedicated Manager server and multiple MySQL (master, slaves) servers Use a dedicated management server to manage multiple g

This article mainly introduces a simple node. js server example. This article implements a simple helloworld example and shows how to run this server, for more information, see the following example: hello world. It seems that the first section of each language tutorial will talk about this, and we are no exception. First, create a project directory, which can be defined by yourself. In this case, the d

Why is Node. js so popular? Why is Node. js popular? Why is node. js popular? Node. js is a server technology used to build and run Web appl

topic, the author Felix published a blog post, which shares some constructive guidelines. The csdn r D channel now compiles this article and shares it with developers. You are also welcome to publish your own Node. js practices. Poor use cases Apps's high CPU usage has always been in favor of

JavaScript on the web. Firefox has an engine called SpiderMonkey, Safari has javascriptcore,chrome V8 node. JS is the V8 engine with the ability to manipulate I/O and the network library, so you can use JavaScript to create shell scripts and background services outside the browser or to run on hardware JavaScript is a web front-end language that is used pr

propName or obj ['propname'> method to find the object attributes but fail to search for them. hasOwnProperty ('propname') is used to search for attributes in the prototype object. If the property does not exist in the prototype chain, the undefined value is returned. Let's use the following example to illustrate: if (typeof Object.create !== 'function') { Object.create = function (o) { var F = function () {}; F.prototype = o; return new F

Quick understanding of Node. js environment configuration in the Window of node. js, Node. jsnodejs In the window, I also tried it. The installation was complete and the test passed! 1. Download node Download

. Step 5. Download and install node. js Run the cygwin program on the desktop. Enter the wget http://nodejs.org/dist/node-v0.4.7.tar.gz in the Command window and press Enter. Note:: I am writing this article about node. the latest version of JS is

increase the content in the a.txt to make the read time longer,Code, create main3.js write the above code, use Reatereadstream to create a read stream object, use on the object to listen to "data" to read the event, each read a piece of data, will trigger this event, when read, it will trigger an "end" event.With the execution of Main3.

Node. js module mechanism learning notes, node. js learning notes Javascript has never been used as a programming language since its birth. In the Web 1.0 era, this scripting language is mainly used for Form Verification and webpage special effects. It was not until the Web 2.0 era that front-end engineers used it to g

This article will share with you the use of node. js is used to develop Weibo instances. After reading the nodejs Development guide, I found that many of the Code in the book is no longer available, because the express version has been upgraded, so today, I will try to develop Weibo instances and recommend them to you. I have been persistently engaged in front-en