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Programming *

The art of creating computer programs

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Synchronous Request-Response using REST and Apache Kafka

Reading time8 min
Views9.8K

At first glance making REST and Apache Kafka compatible seems quite a challenge. However Innotech team nailed the task. Kirill Voronkin, Lead Developer at Innotech, shared the details on transforming unsynchronized queries into synchronized.

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Vulnerabilities due to XML files processing: XXE in C# applications in theory and in practice

Reading time16 min
Views1.5K

How can simple XML files processing turn into a security weakness? How can a blog deployed on your machine cause a data leak? Today we'll find answers to these questions, learn what XXE is and how it looks like.


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How the Carla car simulator helped us level up the static analysis of Unreal Engine 4 projects

Reading time17 min
Views1.7K

One of the mechanisms of static analysis is method annotations of popular libraries. Annotations provide more information about functions during errors detecting. CARLA is an impressive open-source project in C++ that helped us implement this mechanism to our analyzer. Subsequently, the simulator became a test-target for the improved PVS-Studio static analyzer.


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XSS: attack, defense — and C# programming

Reading time11 min
Views2.5K

XSS - or cross-site scripting - is one of the most common vulnerabilities in web applications. It has been on the OWASP Top 10 list (the list of the most critical security risks to web applications) for a while now. So let's figure out together how your browser can acquire and execute a script from a third-party website, and what this may lead to (spoiler: your cookies could get stolen, for example). And while we're at it, we'll talk about ways you can protect yourself from XSS.

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Creating a NuGet package for a library with platform-specific API

Level of difficultyMedium
Reading time13 min
Views9.8K

When creating a .NET library with a partially platform-specific API, we should think about how to pack it into a NuGet package so that the installed library will work in various scenarios (.NET Framework, .NET Core, self-contained application and so on). Unfortunately, it is difficult to find a step-by-step instruction on the web that describes how to perform this task. This article is intended to be such an instruction.

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Twilio vs Sendbird vs CONTUS MirrorFly Feature Comparison | Twilio vs Competitors

Reading time8 min
Views2.8K

Looking out for the best in app chat solution providers to enhance your business.

Getting confused with so many options to choose among  Sendbird and Twilio competitors. 

Then, let’s have some clarity with a detailed discussion over the feature comparison to go for the best Twilio and Sendbird alternative.

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Algorithms in Go: Iterative Postorder Traversal

Reading time3 min
Views3.2K

In this article, we discuss the postorder traversal of a binary tree. What does postorder traversal mean? It means that at first, we process the left subtree of the node, then the right subtree of the node, and only after that we process the node itself.

Why would we need to do it in this order? This approach solves an entire class of algorithmic problems related to the binary trees. For example, to find the longest path between two nodes we need to traverse the tree in a postorder manner. In general, postorder traversal is needed when we cannot process the node without processing its children first. In this manner, for example, we can calculate the height of the tree. To know the height of a node, we need to calculate the height of its children and increment it by one.

Let's start with a recursive approach. We need to process the left child, then the right child and finally we can process the node itself. For simplicity, let's just save the values into slice out.

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Date Processing Attracts Bugs or 77 Defects in Qt 6

Reading time24 min
Views1.6K

PVS-Studio & Qt 6


The recent Qt 6 release compelled us to recheck the framework with PVS-Studio. In this article, we reviewed various interesting errors we found, for example, those related to processing dates. The errors we discovered prove that developers can greatly benefit from regularly checking their projects with tools like PVS-Studio.

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The Code Analyzer is wrong. Long live the Analyzer

Reading time6 min
Views723
Foo(std::move(buffer), line_buffer - buffer.get());

Combining many actions in a single C++ expression is a bad practice, as such code is hard to understand, maintain, and it is easy to make mistakes in it. For example, one can instill a bug by reconciling different actions when evaluating function arguments. We agree with the classic recommendation that code should be simple and clear. Now let's look at an interesting case where the PVS-Studio analyzer is technically wrong, but from a practical point of view, the code should still be changed.
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Spring Boot app with Apache Kafka in Docker container

Reading time4 min
Views31K

Privet, comrads!

In this article i’ll show how easy it is to setup Spring Java app with Kafka message brocker. We will use docker containers for kafka zookeeper/brocker apps and configure plaintext authorization for access from both local and external net.

Link to final project on github can be picked up at the end of the article.

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7 Best Practices Every Budding React.JS Developer Must Follow to Excel

Reading time4 min
Views6.3K
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With the advancement in web technology, the entire globe is sliding towards the online tech sphere. The globe around us is going tech-centric day by day and thus the demand for front-end designers and developers also.

Whatever, be the purpose, people just google things and get their desired result. This is all because of the increase in the evolution of web and mobile app development. While we all know that to be a Web developer, you need to have basic skills of HTML, CSS, and JavaScript, but, with time React.js emerged into the technology stack of the web development field and outdated JavaScript.

A Report by JS reflects that 64.8% of the web developers prefer to use the React.JS framework and would love to use it again and again in the future. It has even beaten other categories of frameworks that are Vue.js with 28.8% votes and Angular with 23.9% votes. This is the reason why the demand for React.JS development companies is at an all-time high.

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With React, it becomes painless to build an interactive user interface. It efficiently updates and renders the right components when changes are made.

Before you use React.js as web technology, let’s have a look at the practices that every React.js developer should follow to write better react codes for their application.
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Dark code-style academy: line breaks, spacing, and indentation

Reading time4 min
Views2.6K

Hey guys! Let me walk you through the next part of our dark-style code academy. In this post, we will discover some other ways how to slow down the reading speed of your code. The next approaches will help you to decrease maintenance and increase a chance to get a bug in your code. Ready? Let's get started.

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PVS-Studio is now in Compiler Explorer

Reading time4 min
Views1.2K
image1.png

Not so long ago, a landmark event has happened: PVS-Studio appeared in Compiler Explorer! Now you can quickly and easily analyze the code for errors right on the godbolt.org site (Compiler Explorer). This feature opens up a large number of new possibilities – from quenching curiosity about the analyzer's abilities to being able to quickly share check results with a friend. This article will cover the topic on how to use these features. Caution – large GIFs!
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How to introduce a static code analyzer in a legacy project and not to discourage the team

Reading time8 min
Views1.7K


It is easy to try a static code analyzer. But it requires skills to introduce it in the development of an old large project. If the approach is incorrect, the analyzer can add work, slow down development, and demotivate the team. Let's briefly discuss how to properly integrate static analysis into the development process and start using it as part of CI/CD.
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Glean Insights About 18 Best Java Frameworks To Use in 2020

Reading time10 min
Views4.3K

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Who doesn’t know about Java today? You can hear its mention in every nook and corner of the world. A significant majority of IT companies provide Java-based applications, while businesses are still driven to secure java applications due to robustness and stringent security facilities. However, Java frameworks are a matter of chaos for a variety of business owners that want their application to be standout.


The fact is that there is no dearth of java frameworks that makes application development simple and efficient. However, a number of people have a query regarding the selection of java framework on the basis of features, ease-of-use, cost, and many more. Businesses hire programmers in India, though they stay confused on which platform they want their app to be created.

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Introducing Java 13: Let's dive Into JDK's New Features

Reading time5 min
Views2.8K


Java has been a programmer’s dream and what’s the better way to quantify Java’s popularity with the new version release Java 13. After the initial Java enhancement proposal, there have been advancements in JDK features that will blow up Java developer’s mind with a new range of features after the official release on September 17, 2019.

But Why do you think Java is so popular?

Java has been a craze among programmers due to its platform independence and the ability to run on different computers. It has been there for so long that it has been adopted by organizations like banks, insurance companies, enterprises, agencies and mostly by software outsourcing companies.

Java has been there in the business to develop android apps, java web applications, software tools, and scientific applications.

Let us delve into the stats and gauge the popularity ratio of Java applications among other competing programming languages.
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Top 5 ReactJS Development Companies

Reading time6 min
Views2.3K
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ReactJS is an open-source JavaScript library designed by Facebook for developing rich and engaging web apps efficiently and quickly with minimal coding.

The core task of ReactJS is providing the best possible rendering performance. Its strength comes from the focus on the individual elements. Instead of working on the complete web app, ReactJS allows a programmer to break down the complex UI into simpler elements.

As per a survey conducted by The State of Javascript, React JS has surpassed Angular and others in becoming the most loved Javascript library.

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