promise in node js

Three file writing methods for Node. js and three write methods for node. js This article describes three methods for writing files in Node. js. 1. Write files through the pipeline streamUsing pipelines to transmit binary streams

This article mainly introduces node. js solves the problem of obtaining the actual file type of an image. This article obtains the mime-type of the file type based on the binary stream and file header, then reads the binary header information of the file, and obtains its actual file type, if you need a file, you can refer to the following requirement: Assume that there is an image file of the actual type as

How to handle. pfx suffix files in Node. js, node. js. pfx Preface In nodejs, various third-party Encryption Files will be obtained during encryption and decryption, and their suffixes will be the same ,. key /. pem /. pfx and so on. Can it be customized? It is a file. However, today I have read a lot of nodejs librari

Because the Node. js version of the Fl engine is considered in the future, the character processing performance of Node. js and PHP is compared. I found that Node. js really dumped several streets in PHP and tested Python again, w

What is node. js?Nodejs is a JavaScript toolkit for writing high-performance Web servers (for JS development service-side programs)Single-threaded, asynchronous, event-drivenFeatures: fast, memory-consumingA millions concurrency test on the web, which consumes 16G of memory without optimization, is due to the asynchronous processing of events after single-threade

3.1 Console/19 in node. js3.1.1 Console.log method/193.1.2 Console.error Method/203.1.3 Console.dir Method/213.1.4 Console.time Method and Console.timeend method/223.1.5 Console.trace Method/223.1.6 Console.assert Method/233.2 Global scope and global functions in node. js/233.2.1 Global scope/23 in node. js3.2.2 settim

Use node. js to build servers and node. js to build servers Use node to build a small server (in fact, it is to analyze the url and then output the file to the client) Recently, you need to complete a course design, which is assigned by the Project Manager (team lead) to wri

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

This article mainly introduces the open-source Node. js application framework HapiJS. This article describes HapiJS introduction, HapiJS installation, project configuration, and development instances. For more information, see 1. Introduction to HapiJS HapiJS is an open-source, Node-based. the js application framework

Perfect solution to NODE. JS cross-origin problems, node. js cross-Origin My company colleagues (front-end) wrote pages over the past few days and said they could not get the desired JSON. Android iOS can get it, however, he is also a newbie and does not know why he only knows the cross-origin issue of

How to learn: read it in detail and implement the relevant code manuallyLearning Goals : This tutorial will teach you to install node, build servers, Express, MySQL, MongoDB, write background business logic, write interfaces, and finally complete a complete project backstage, a total of 10 days is expected.node. js Operation MangodbCreate a folder for placing today's files, NPM init initializes, and creates

The seventh chapter recommends 4 hours of study time 10 chaptersHow to learn: read it in detail and implement the relevant code manuallyLearning Goals : This tutorial will teach you to install node, build servers, Express, MySQL, MongoDB, write background business logic, write interfaces, and finally complete a complete project backstage, a total of 10 days is expected.node. js Operation MangodbCreate a fol

This article mainly introduces three unknown Node types. js Code optimization methods help you optimize code. If you are interested, refer to Node. the running of js programs may be limited by the CPU or input/output operations and very slow. From the CPU perspective, one of the typical causes of slow running is the un

// Package1 2 var Package2 = require (". /package2 " 3 console.log ("Name:" + package2.getname ()); 1 // Package2 2 var name = "Lyjn"; 3 4 /* Todo:exports Set a GetName method to get the name */ 5 function () {6 return name; 7 };Fully OK2. Knowledge points in node only module scope, no global scope require the main role1.加载模块并执行模块中的代码;2.返回exports对象;Exports object1.所有模块都有一个exports对象，默认值是一个空对象`{}`;2.可以给exports对象添加属性;Little Tricks1.require

This article mainly introduces how to use VS to develop Node. the js method mainly uses NTVS (Node. jsToolsforVisualStudio). For more information, see NTVS (Node. jsToolsforVisualStudio) is an IDE tool that runs on VS2012 and VS2013. Using this plug-in is undoubtedly a good news for our traditional. net developers to l

The same set of business logic, implementing a WebService intermediate interface, involving memcached and mogodb some operations.implemented separately in node. JS and the Java platform, Java code is deployed on Tomcat 7.0 and tested with Apache JMeter for stress testing.The resulting test results are surprisingly, why is node. JS's high concurrency advantage not

This article mainly introduces. js Implementation of file replication methods and instances, using the FS module, friends can refer to the next Node. js does not provide APIs for directly copying files. If you want to use Node. js to copy files or directories, you need to us

Node. js static server implementation method, node. js static Server When you enter a url, the url may correspond to a resource (File) on the server or a directory. The So server analyzes the url and does different things for different situations. If the url corresponds to a file, the server returns the file. If the ur

node. JS environment Self-built, refer to the Novice tutorial node. js.1 submitting form forms in index.html via AjaxThe register.html file is as follows:DOCTYPE HTML>HTML>Head> MetaCharSet= "UTF-8" /> title>Documenttitle> Scriptsrc= "Jquery.js">Script> Scriptsrc= "Ajax.js">Script> style>form{padding:100

This article mainly introduces node. js mongodb Operations Learning summary, this article provides mongodb to create a database, insert data, connect to the mongodb database and query data and other code instances, friends can refer to the next, preparation 1. Create a table to be read in mongodb Create a database named Test The Code is as follows: Use extension test; Insert data to the user table The C