Your Choice JavaScript News

Node News Tuesday, February 13

Node News TLDR / Table of Contents

  • Node.js and The Internet of Things
    • Last year, we interviewed Patrick Catanzariti and asked him if Javascript will be the language of IoT. It was one of our most shared Q&am…
    • Intel Edison, Node Community Conference, cross-platform runtime environment, server-side Web applications, Q&As. Charlie Key
  • How to check whether a script is running under node.js?
    • Well there’s no reliable way to detect running in Node.js since every website could easily declare the same variables, yet, since there’s no window object in Node.js by default you can go the other way around and check whether you’re running inside a Browser.
    • object, browser, module, Ivo Wetzel Nov, Eric Bréchemier Feb
  • Understanding & Measuring HTTP Timings with Node.js | @RisingStack
    • This post explains timings in an HTTP request and shows how to measure them in Node.js to discover performance bottlenecks in client/server to server comms.
    • http timings, tcp connection, http request, Measuring HTTP Timings, TCP connection timeout
  • Node.js and MySQL tutorial
    • Node.js and MySQL is one of the necessary binding needed for any web application. MySQL is one of the most popular open source database in world and effici
    • code, connection, mysql, concurrent users, concurrent connection code
  • Loading basic HTML in Node.js
    • Just a simple Node.js noob question here. I’m trying to find out how to load and “display” a basic HTML file so I don’t have to write code like response.write(‘…

      blahblahblah

      …’);.

    • var, var http, var fs, var app, var path
  • Last year, we interviewedPatrick Catanzaritiand asked him if Javascript will be the language of IoT.
  • In software development, Node.js is an open-source, cross-platform runtime environment for developing server-side Web applications.
  • Although Node.js is not a JavaScript framework, many of its basic modules are written in JavaScript, and developers can write new modules in JavaScript.
  • Here’s his presentationand a look at where the market of the Internet of Things is and how technologies like Node.js (JavaScript) and the Intel Edison are making it easier to create connected solutions.
  • The major topics include: – – * What is the Internet of Things – – * Where is IoT Today – – * 4 Parts of IoT (Collect, Communicate, Analyze, Act) – – * Why JavaScript is Good for IoT – – * How Node.js is Making a Dent in…

Tags: Intel Edison, Node Community Conference, cross-platform runtime environment, server-side Web applications, Q&As. Charlie Key

  • On one hand this might be the behavior you want, but it also dictates what variables the library user can use in the global scope.
  • The trick however, is that if we are assuming that your script is being loaded in the global scope (which it will be if it’s loaded via a script tag) a variable cannot be reserved in an outer closure, because the browser does not allow that.
  • Now remember in node, the object is an empty object, yet, the variable is still available.
  • So we can then fix underscore’s check by adding an extra check: – – With this, if someone declares in the global scope in the browser, it will be placed in the object, which will cause the test to fail, because , will be the same object as module.
  • Thus, the final test is: – – Note: While this now allows the variable to be used freely in the global scope, it is still possible to bypass this on the browser by creating a new closure and declaring within that, then loading the script within that closure.

Tags: object, browser, module, Ivo Wetzel Nov, Eric Bréchemier Feb

  • Before we jump into HTTP timings, let’s take a look at some basic concepts: – – IP (Internet Protocol): IP is a network-layer protocol, deals with network addressing and routing.
  • An HTTP client initiates a request by establishing a TCP connection.
  • TCP Connection: Time it took to establish TCP connection between a source host and destination host.
  • To measure HTTP timings in Node.js, we need to subscribe to a specific request, response and socket events.
  • Here is a short code snippet how to do this in Node.js, this example focuses only to the timings: – – DNS Lookup only happens with domain names: – – TCP Connection happens immediately after the host is resolved: – – TLS handshake (SSL) happens only with https protocol: -…

Tags: http timings, tcp connection, http request, Measuring HTTP Timings, TCP connection timeout

  • Make sure you have started MySQL on default port and changed the parameter in above code then run this code using – – Above code is just for learning purpose and not for production payload.
  • In production scenario is different, there may be thousands of concurrent users which turns into tons of MySQL queries.
  • In Node mysql, we can use pooling directly to handle multiple connection and reuse the connection.
  • We have created 100 connection limit in code, so you might be wondering that after 100 concurrent connection code will break.
  • If your MySQL server is configured to handle such traffic at one socket then it will run and our code will manage the scheduling of concurrent connection.

Tags: code, connection, mysql, concurrent users, concurrent connection code

  • The easy way to do is, put all your files including index.html or something with all resources such as CSS, JS etc. in a folder public or you can name it whatever you want and now you can use express js and just tell app to use the _dirname as…
  • we are creating express instance named app and we are giving the adress if the public directory to access all the resources.

Tags: var, var http, var fs, var app, var path

Top Node Courses

The Complete Node.js Developer Course (2nd Edition) (60,232 students enrolled)

By Andrew Mead
  • Build, test, and launch Node apps
  • Create Express web servers and APIs
  • Store data with Mongoose and MongoDB
  • Use cutting-edge ES6/ES7 JavaScript
  • Deploy your Node apps to production
  • Create real-time web apps with SocketIO

Learn more.


Angular (Angular 2+) & NodeJS - The MEAN Stack Guide (26,806 students enrolled)

By Maximilian Schwarzmüller
  • Build real Angular + NodeJS applications
  • Understand how Angular works and how it interacts with Backends
  • Connect any Angular Frontend with a NodeJS Backend
  • Use MongoDB with Mongoose to interact with Data on the Backend
  • Use ExpressJS as a NodeJS Framework
  • Provide a great user experience by using Optimistic Updating on the Frontend
  • Improve any Angular (+ NodeJS) application by adding Error Handling

Learn more.