node js server monitoring

This article mainly introduces node. socket. io broadcast messages. For more information, see socket. the io () server has a sockets attribute. The attribute value is all socket objects connected to the client. you can use the send method or emit method of this object to broadcast messages to all clients. Io. sockets. send ("user commected ); Io. socket. emit ("login", names ); Case

');var server = Http.createserver (function (req, res) { There's a mistake here, the params is undefined. var ok = Req.params.ok; Res.writehead ($, {' Content-type ': ' Text/plain '}); Res.end (' Hello world\n ');});Server.listen (8080, ' 127.0.0.1 ');Console.log (' Server running at http://127.0.0.1:8080/');Start the service and test it in the address bar. http://127.0.0.1:8080/As expected,

before running. This process takes a little time, although the compilation speed from coffee to js is actually quite fast. However, this should not be a big problem. In general, require is written at the top of the file, that is, when the application is started, it is angry that all the require files are require, when require is used, coffee is compiled into js and put into the

Definition: node. js is a JavaScript running platform running on the server side using the Google V8 engineFeatures: 1. asynchronous I/O (non-blocking I/O) 2. Event-drivenWhat is asynchronous I/O (non-blocking I/O)?To understand what asynchronous I/O is (non-blocking I/O), you must first understand what I/O, what is blocking, and what is synchronous I/O (blocking

Example of using Node. js to implement RESTful API, node. jsrestful Basic RESTful concepts REST (Representational State Transfer) describes an architecture-style network system that first appeared in Roy Fielding's doctoral thesis in 2000. In the REST service, application status and functions can be divided into various resources. Resources are made public to the

The Socket. IO instance in node. js, node. jssocket. io 1. Introduction First Socket. IO Official Website: http://socket.io The official website is very concise, and there is no API documentation. There is only one simple "How to use" for reference. Because Socket. IO is as simple and easy to use as the official website. So what is Socket. IO? Socket. IO is a Web

) {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:

indicates the number of requests sent in several rounds, that is, the total number of requests is:-cNum*-rNumHowever,-r cannot be used with-t (why? You guess). eg:-r 20 -T NUM test duration refers to the time required to run a test. After timeout, the test is completed. -F file. used to test the url path eg in the file:-f girls.txt. -B. Ask whether to enable the benchmark (benchmark ). This parameter is not very important. If you are interested, you can continue to learn. I will not introduce-c

as map, reduce, and forEach, do not necessarily support all browsers. We can solve some browser compatibility issues through the front-end library. But for Node. js, You Need To Know Exactly What operations Google's V8 JavaScript Engine supports. In this way, you can directly use these built-in methods on the server to operate the set. 9. Use Nginx before

Common Methods for JavaScript MySQL operations in Node. js, node. jsmysql 1. Create a database connection: createConnection (Object) MethodThis method accepts an object as a parameter. This object has four common attributes: host, user, password, and database. The parameter is the same as the parameter used to connect to a database in php. The attribute list is a

, in fact, in order to get things done, you don't need anything, you need action. in other words, you don't need a noun, you need a verb . After understanding the core and basic ideas in this concept, I naturally understood the function programming. One more thing to understand about node. JS is the difference between blocking IO and non-blocking IO (using callback functions) To put it sim

Node. js BASICS (10) use the net module and Readline module to implement Socket communication, and node. jsreadline The socket communication of Node. js is very similar to that of C ++ and Java. Those who have learned the socket communication of these two languages can quic

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

Teach you how to deploy the Node. js application on heroku cloud platform, herokunode. js Although AWS has also launched its own PaaS platform called Elastic Beanstalk, heroku has many third-party add-on, such as MongoDB, mysql, redis, and memcached, there are also various plug-ins such as message queue, sms and email, backend batch processing, search, and automa

node. JS learns to follow the flow of this book. At the end of the 7th chapter and the end of the 10th chapter, respectively, a small project to practice practiced hand. Node. JS's Introductory Learning Plan is like this. Directory: qq:1045642972 Welcome to the book and discuss node. js.node.

Introduction to Node. js open-source application framework HapiJS, node. jshapijs 1. Introduction to HapiJS HapiJS is an open-source, Node-based. the js application framework is suitable for building applications and services. Its design goal is to allow developers to focus

2 methods for connecting node. js to MongoDB database tutorial, node. jsmongodb Preface The MongoDB Node. js driver is officially supported by the native node. js driver. It is the best

Brief introduction node. JS is a platform that lets JavaScript out of the browser running on the server, not the language;The JavaScript engine used by node. JS is a V8 from Google Chrome; JavaScript compatibility issues that run outside the browser without ha

Transferred from: Http://www.infoq.com/cn/articles/node-js-and-io-jsLast December, a number of heavyweight node. JS developers were dissatisfied with Joyent's management of node. JS and created Io.js. The io.js was developed very

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