Diagnostic Logging with the NGINX JavaScript Module

It’s also one of many blogs about use cases for the NGINX JavaScript module. For the complete list, see Introduction to the NGINX JavaScript Module.

NGINX helps organizations of all sizes to run their mission‑critical websites, applications, and APIs. Regardless of your scale and choice of deployment infrastructure, running in production is not easy. In this article we talk about just one of the hard things about a production deployment – logging. More specifically, we discuss the balancing act of collecting the right amount of detailed logs for troubleshooting without being swamped with unnecessary data.

Logging Basics

NGINX provides two different logging mechanisms:  access logging for client requests, and error logging for when things go wrong. These mechanisms are available in both the HTTP and Stream (TCP/UDP) modules, but here we focus on HTTP traffic. (There is also a third logging mechanism which uses the  debug severity level, but we won’t discuss it here.)

#debugging #logging #nginx javascript module #javascript

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Diagnostic Logging with the NGINX JavaScript Module

It’s also one of many blogs about use cases for the NGINX JavaScript module. For the complete list, see Introduction to the NGINX JavaScript Module.

NGINX helps organizations of all sizes to run their mission‑critical websites, applications, and APIs. Regardless of your scale and choice of deployment infrastructure, running in production is not easy. In this article we talk about just one of the hard things about a production deployment – logging. More specifically, we discuss the balancing act of collecting the right amount of detailed logs for troubleshooting without being swamped with unnecessary data.

Logging Basics

NGINX provides two different logging mechanisms:  access logging for client requests, and error logging for when things go wrong. These mechanisms are available in both the HTTP and Stream (TCP/UDP) modules, but here we focus on HTTP traffic. (There is also a third logging mechanism which uses the  debug severity level, but we won’t discuss it here.)

#debugging #logging #nginx javascript module #javascript

Harnessing Power & Convenience of JavaScript for Each Request with NGINX JavaScript Module

Editor_ – The blog post titled “Introduction to the NGINX JavaScript Module” redirects here. The post has been updated to use the NGINX JavaScript Module directives and features supported as of April 2021._

The NGINX JavaScript module (njs) became generally available as a stable module in NGINX Open Source 1.11.10 and  NGINX Plus R12. [The module was originally called nginScript, and that name appears in some older posts.] We have been working steadily on NGINX JavaScript since its launch in  September 2015, adding the features and language support included in the stable module.

NGINX JavaScript is a unique JavaScript implementation for NGINX and NGINX Plus, designed specifically for server‑side use cases and per‑request processing. It extends NGINX configuration syntax with JavaScript code in order to implement sophisticated configuration solutions.

The use cases are extensive, especially as the NGINX JavaScript module is available for both HTTP and TCP/UDP protocols. Sample use cases for NGINX JavaScript include:

• Generating custom log formats with values not available from regular NGINX variables (for example,  diagnostic logging)
• Modifying responses from proxied servers
• Implementing custom authentication schemes (for example,  OAuth 2.0 token introspection)
• Parsing TCP/UDP protocols for application‑level sticky sessions (for example, [MQTT load balancing])

Before discussing NGINX JavaScript in more detail, let’s first address two common misconceptions.

NGINX JavaScript Is Not Lua

The NGINX community has created several programmatic extensions over the years. At the time of writing, Lua is the most popular of these; it’s available as a  module for NGINX and a  supported, prebuilt third‑party dynamic module for NGINX Plus. The Lua module and add‑on libraries provide deep integration with the NGINX core and a rich set of functionality, including a driver for Redis.

Lua is a powerful scripting language. It, however, remains fairly niche in terms of adoption and is not typically found in the “skillset toolbox” of the frontend developer or DevOps engineer.

NGINX JavaScript does not seek to replace Lua and it will be some time before NGINX JavaScript has a comparable level of functionality. The goal of NGINX JavaScript is to provide programmatic configuration solutions to the widest possible community by using a popular programming language.

#blog #tech #javascript #nginx javascript module

What is JavaScript - Stackfindover - Blog

Who invented JavaScript, how it works, as we have given information about Programming language in our previous article ( What is PHP ), but today we will talk about what is JavaScript, why JavaScript is used The Answers to all such questions and much other information about JavaScript, you are going to get here today. Hope this information will work for you.

Who invented JavaScript?

JavaScript language was invented by Brendan Eich in 1995. JavaScript is inspired by Java Programming Language. The first name of JavaScript was Mocha which was named by Marc Andreessen, Marc Andreessen is the founder of Netscape and in the same year Mocha was renamed LiveScript, and later in December 1995, it was renamed JavaScript which is still in trend.

What is JavaScript?

JavaScript is a client-side scripting language used with HTML (Hypertext Markup Language). JavaScript is an Interpreted / Oriented language called JS in programming language JavaScript code can be run on any normal web browser. To run the code of JavaScript, we have to enable JavaScript of Web Browser. But some web browsers already have JavaScript enabled.

Today almost all websites are using it as web technology, mind is that there is maximum scope in JavaScript in the coming time, so if you want to become a programmer, then you can be very beneficial to learn JavaScript.

JavaScript Hello World Program

In JavaScript, ‘document.write‘ is used to represent a string on a browser.

<script type="text/javascript">
	document.write("Hello World!");
</script>

How to comment JavaScript code?

• For single line comment in JavaScript we have to use // (double slashes)
• For multiple line comments we have to use / * – – * /

<script type="text/javascript">

//single line comment

/* document.write("Hello"); */

</script>

Advantages and Disadvantages of JavaScript

#javascript #javascript code #javascript hello world #what is javascript #who invented javascript

Hire Dedicated JavaScript Developers -Hire JavaScript Developers

It is said that a digital resource a business has must be interactive in nature, so the website or the business app should be interactive. How do you make the app interactive? With the use of JavaScript.

Does your business need an interactive website or app?

Hire Dedicated JavaScript Developer from WebClues Infotech as the developer we offer is highly skilled and expert in what they do. Our developers are collaborative in nature and work with complete transparency with the customers.

The technology used to develop the overall app by the developers from WebClues Infotech is at par with the latest available technology.

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#hire dedicated javascript developers #hire javascript developers #top javascript developers for hire #hire javascript developer #hire a freelancer for javascript developer #hire the best javascript developers

The essential JavaScript concepts that you should understand

As a JavaScript developer of any level, you need to understand its foundational concepts and some of the new ideas that help us developing code. In this article, we are going to review 16 basic concepts. So without further ado, let’s get to it.

#javascript-interview #javascript-development #javascript-fundamental #javascript #javascript-tips