Posts about go
103 Early Hints in Go, or the new Way of How to Improve Performance of a Web Page written in Go
Since Go 1.19 we can use a new 103 (Early Hints) http status code when we create web applications. Let’s figure out how and when this could help us.
We are going to create a simple golang web server that servers some html content. One html page will be served with 103 header and another one without.
After loading comparison we will see how early hints can improve page performance.
Example of how Golang generics minimize the amount of code you need to write
I guess that almost everyone in the go community was exciting when Go 1.18 was released, especially because of generics. Some days ago I decided to try generics in the real-world application, by refactoring some of its pieces, related to a caching logic.
go generics redis cache
Concurrent Map Writing and Reading in Go, or how to deal with the data races.
This time, I will show you how to work with the maps in go effectively and prevent the occurrence of the data race errors. Data races happen when several goroutines access the same resource concurrently and at least one of the accesses is a write.
go concurrent map data race
Ristretto - the Most Performant Concurrent Cache Library for Go
Recently, I discovered a surprisingly reliable memory caching solution, which I’m planning to use in all my further applications to increase performance. In this blog post, I will share some code examples of how you can integrate Ristretto caching library into your application.
go caching ristretto performance
How to Show Flash Messages in Go web applications (with Echo framework)
When we create a web application, usually, there a need to communicate with the users to inform them about the results of their actions. The easiest way to communicate - is to send messages. These messages might be warnings, errors, or just informational text. In this article, we will improve the UX of our user authentication application from the previous article by adding an error flash message when the user entered a wrong password and a success message after user authorisation.
go echo flash messages
User Authentication in Go Echo with JWT
In this article, we will build a simple user authentication functionality using JWT (JSON Web Token). In the examples, I’m going to use a Go Echo framework. This will allow us to avoid writing some boilerplate code.
go authentication JWT Echo
A Simple Queue Implementation in Golang with channels
In this post, I’m going to show the way how we can implement a simple queue in Golang, using channels.
go queue channel goroutine
How to Sort Strings With Go Alphabetically in Any Language
In this article I’m going to show how easy we can sort strings alphabetically in different languages, using Go. It seems like an easy task if we want to sort English words, however, it’s not so trivial if we want to sort correctly strings with special characters or in other languages, i.e Cyrillic based.
go sorting alphabetical sort
How to Control Router Access Permissions in Go Web Apps
In this post I’m going to describe how can we limit user access to the specific url in golang web application. I will use chi router - a lightweight, idiomatic and composable router for building Go HTTP services.
go router chi
How to test database interactions in golang applications
Testing of functions with database interactions always was challenging. Recently, I found a wonderful library go-sqlmock which will simplify writing tests and mocking database queries in golang applications a lot.
go testing sql