node js support

) { pool.getConnection(function(err, connection) { connection.query(queryString, function(err, rows, fields) { //if (err) throw err; if (!err) { resolve(rows); } else { reject(err) } connection.release(); }); }) })}module.exports = function() { return new Promise(function(resolve, reject) { queryPromise("select * from wb123_home_map GROUP BY onestairs") .then(function(results){ resolve(results); })

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

Node. js Study Notes (2)-modularization, node. js Study Notes Welcome to reprint, but please indicate the source: http://blog.csdn.net/sysuzjz/article/details/43987289 Thanks: nodebeginner.org An application consists of different modules. Now we will introduce these modules one by one.In the previous section of the ser

This article describes how to build a Node. js development environment in Linux. Node allows JavaScript programs to be explained and run in the local operating system environment. For more information, see 1. install node. js in Linux Ubuntu: sudo apt-get install nodejs np

Summarize some error types in Node. js and summarize the node. js types. Preface Multiple types of errors may occur in Node. js applications. For example, if a syntax error or runtime error occurs, a JavaScript error is triggered.

*)-(\ d *)/); // The minimum unit of network transmission is one byte if (result) {start = isNaN (result [1])? 0: parseInt (result [1]); end = isNaN (result [2])? End: parseInt (result [2])-1; // because the readstream index is before and after the package, the value of 1} return fs is subtracted. createReadStream (filepath, {start, end });} Packaged as a command line tool We can enter npm start Startdev-serverYou can also customize a startup command to start our static server. The general idea

Analyzes the callback and code design modes in Node. js asynchronous programming, and node. js design modes The biggest selling point of NodeJS is the event mechanism and asynchronous IO, which is not transparent to developers. Developers need to write code in asynchronous mode to use this selling point, which has also

. js.You can see the effect by accessing http: // localhost: 8033 in the browser. Configure oracle SupportDownload the oracle database client connection package from the oracle websiteInstantclient-basic-linux, instantclient-sdk-linuxUnzip the oracle client connection module $ unzip instantclient-basic-linux-11.2.0.3.0.zip $ unzip instantclient-sdk-linux-11.2.0.3.0.zip $ sudo mv instantclient_11_2/ /opt/instantclient $ cd /opt/instantclient $ sudo ln -s libocci.so.11.1 libocci.so $ sudo ln -

Node. js Learning (2)-routing function and form upload, node. js form Today. getting started with js this book has learned some basic knowledge about node, including server creation, implementation of routing functions, form uploa

Hypermedia is a technology that uses a non-linear mesh structure to organize and manage massive multimedia information (including text, images, and videos. The concept of hypermedia is similar to that of hypertext in the early days. The essence of hyper-media is to add links to the text content, which constitutes hyper-text. The same is true for hypermedia. Both hypermedia and hypertext are transmitted over HTTP, which means that hypermedia can be accepted by all browsers. MIME is used to descri

After you install node. js, choose a beneficial IDE for your development.After comparing multiple Ides, it is positioned on webstrom and sublime.There is a simple comparison:Webstorm feature is very rich, the front-end development tool of the synthesizer, compared to sublime slightly heavierSublime plug-in is also very rich, the interface is more beautiful, very light, also has a simple project management f

[Simple introduction to node. js] excerpt 2: simple introduction to node. jsChapter 2 module Mechanism 1. The purpose of the CommonJs specification is to allow JavaScript to run anywhere. 2. For a long time, JavaScript has the following defects: (1) No Module System (2) fewer standard databases (3) No standard interface (4) Lack of a package management system The

This article mainly introduces Node. js package details, Node. A js package is a directory that contains the package in JSON format. json, Node. the js package basically follows the CommonJS specification. For more information, se

the old memory, so no new method can be called through the old reference. Node. js does not apply black magic to JavaScript, and the reference problem is still the content of JavaScript. For example, module. exports and exports hide some details, which are easy to misunderstand. The essence is still JavaScript. Note [1]: To be honest, the module declaration in the function is a bit of Tan haoqiang's feelin

For other third-party modules installed through NPM (third-party modules) or local modules, each module exposes a public API. So that developers can import data. For example Copy codeThe Code is as follows:Var mod = require ('module _ name ') After this statement is executed, the Node will load the built-in module or the module installed through NPM. The require function returns an object. The API exposed by this object may be a function, object, or a

in the code: app.use(session({ secret: 'test', resave: false, saveUninitialized: true, cookie:{ maxAge: 1000*60*60 // default session expiration is set to 1 hour }, store: new MemcachedStore({ hosts: ['127.0.0.1:9000'], prefix: 'test_' })})); The above session uses memcached as the session storage method, for how to use memcached can refer to the address on Github https://github.com/balor/connect-memcached Of course, you can also use other session storage

Simple implementation of node. js Image Upload and node. js Image Upload The examples in this article share the code for uploading node. js images for your reference. The details are as follows: 1.

This article mainly introduces the implementation of sleep function instances in nodejs. This article describes the development process and performance testing of the sleep function, for more information about node. JS, the most unpleasant thing is its single-threaded feature. Many things cannot be done. For CPU-intensive scenarios, the performance is not strong enough. For a long time, I wanted to seek som

This article will introduce you to the front-end and back-end of the practical node. js website, which is very detailed. If you need it, you can refer to what node. js can do? I still don't know where he is widely used, and I have no chance to access such a project. Just because I like it, I made a website and backgrou