node js chat application

This article mainly introduces how to optimize Node. this article describes the ten tips for jsWeb application running speed, including parallel, asynchronous, cache, gzip compression, and client rendering. If you need them, refer to Node. js has benefited from its event-driven and asynchronous features, and has become

) {console. log (error);} else {console. log (result );} // Close the database link to db. close () ;}); // mongoose findvar criteria = {title: 'emtity _ demo_title '}; // query condition var fields = {title: 1, content: 1, time: 1}; // The Field var options ={}; mongooseModel. find (criteria, fields, options, function (error, result) {if (error) {console. log (error);} else {console. log (result);} // closes the database link to db. close () ;}); // Delete the record var conditions = {username:

not get up at all.In addition, node cluster also has a certain degree of fault tolerance, it is similar to nginx workers, but the consumption of resources (memory) is slightly larger, programming is not very convenient, Ourjs did not adopt such a design, in the future if the flow reaches a certain level, a single process can not meet the requirements, or with multiple servers (VMs), several separate node w

(fmt), ...); local platformCode = cc.Application:getInstance():getTargetPlatform(); local platform = 'unknown'; if platformCode == 0 then platform = 'windows' elseif platformCode == 3 then platform = 'android' elseif platformCode == 4 then platform = 'ios'; elseif platformCode == 5 then platform = 'ipad' end local xhr = cc.XMLHttpRequest:new() xhr.responseType = cc.XMLHTTPREQUEST_RESPONSE_STRING xhr:open("POST", "http://"..GameConfig.LogServerIp) xhr:

Basic tutorial on how to use the Request module to process HTTP requests in Node. js, node. jsrequest Here we will introduce a Node. js module -- request. With this module, http requests become super simple. The Request is simple and supports both https and redirection. Va

Node. js and Socket. IO extend Django's real-time processing functions This article mainly introduces the use of Node. js and Socket. i/O extends Django's real-time processing function. The real-time asynchronous processing function is quite powerful. The example given in this article is to create a real-time

This article is about the 4 great advantages of node. js and the choice of node. js Four point reason, are the benefits of node. js, of course, there are certainly bad places, the article also describes the five shortcomings of

Front end, but want to learn a back end of the language, is originally want to learn node JS, after all, if the node as the backend language to my front-end of the JS familiarity is also helpful, but found that node learning curve is a bit steep, and there is no good learnin

Asp.net exercise ① -- Application chat room, asp. netapplication I have not written the code for several years, and I have re-practiced the code and made notes here. Js Code of the aspx page: 　　 　　 Asmx code: [WebMethod (Description = "get chat record", EnableSession = true)] public string GetMessageContent () {if (

call when the main thread loops back to the event. This process is called the event loop , as shown in:This diagram is the whole node. JS operating principle, from left to right, top to bottom, node. js is divided into four layers, the application layer , theV8 engine layer

create the folder like so: Mkdir-r C:\USERS\SOMEUSER\APPDATA\ROAMING\NPMWhy use Visual Studio 2013? Node Tools for Visual studio!With node. js installed, it ' s time to select a development tool. Of course, you is free to use any editing tool want and why use a glorified notepad when you can experience the full Power of Enterprise-grade integrated development en

Have not written code for several years, re-practice code, do notes in this memo.aspx page JS code:　　　　ASMX code:[WebMethod (Description = "Get chat history", EnableSession = True)] public string getmessagecontent () {if ( application["message"] = = null) {return ' no chat information currently. ";

implement a site that contains the jade parent/child layout, less pre-compiled CSS, Twitter and Facebook logon, mobile layout, and verification code. When you use any of these templates to create a new application, webmatrix2. Make sure that node, NPM, and iisnode are installed in your system. If they are not installed, webmatrix 2 will automatically install any missing dependencies. This feature is partic

index.html is in the views folder. There is no code, but I will post it as well. my box In this way, access localhost: 3000 in the browser after the node app. js is started. Enter the username in the database in the input file to obtain the data. Ps: What are the advantages and disadvantages of using Node. js? A

Detailed description of the environment variable process. env in Node. js, node. jsprocess. env Preface We have been working with O m gg to deploy the project in the last two days. One problem is our dev, uat, and product environment. Because it is the frontend and backend separation, the domain name of the backend interface will be switched during development a

don't know livewired, you should know that you can use the JScript language (1996) or Rhino in ASP. But until the 2009, these server-side JavaScript technology and the same application on the server side of Java, PHP, compared to appear relatively pale.When it comes to the origins of node. js, it's inevitable to talk to its founder, Ryan Dahl. In 2009, the servi

Introduction to the Node. js lightweight Web framework Express4.x User Guide, node. jsexpress4.x Express is a lightweight Web framework that is simple and flexible It is also the most popular Nodejs-based Web framework. With this feature, we can quickly build a complete website (express) Express is now in version 4.x, which is updated quickly and is not compatibl

Concatenates the Promise execution stream. Now you can use 'async'/await directly. function asyncTask () { return functionA() .then((valueA) => functionB(valueA)) .then((valueB) => functionC(valueB)) .then((valueC) => functionD(valueC)) .catch((err) => logger.error(err))} After conversion async function asyncTask () { try { const valueA = await functionA() const valueB = await functionB(valueA) const valueC = await functionC(valueB) return await functionD(valueC) } catch (err) { logger

the length of the current range. { server: 'nginx', date: 'Wed, 24 Jan 2018 02:43:20 GMT', 'content-type': 'application/zip', 'content-length': '12420187', 'last-modified': 'Tue, 16 Jan 2018 12:09:47 GMT', connection: 'close', etag: '"5a5deb8b-ecdb53"', expires: 'Thu, 31 Dec 2037 23:55:55 GMT', 'cache-control': 'max-age=315360000', 'access-control-allow-origin': '*', 'accept-ranges': 'bytes', 'content-range': 'bytes 3102456-15522642/15522643' } You c

-only in the future. Continue the test and find another problem. Normally, the file upload function in the blog background uploads files to the public/upload directory, but in fact the public/upload folder is generated under the launch directory (that is, the original bin directory. The reason is that the www file used as the program entry is under the launch directory, so the launch directory becomes the execution directory of the application. My sol