Go Community Linklog
Made a library? Written a blog post? Found a useful tutorial? Share it with the Go community here or just enjoy what everyone else has found!
Converting Character Encodings In Golang
At one point or another, every developer gets stuck converting a pile of files from one character encoding to another. Go's native character set is UTF-8, and the core Go libraries don't come with tools for converting character sets. However, one of the Go extension libraries makes this easy.
Why Go Interfaces are Awesome
In object-oriented programming, an “interface” is a description of the things an object can do. Usually, this takes the form of a list of methods an object is guaranteed to have. C# and Java both support interfaces, and so does the Go programming language, but Go’s interfaces are especially easy to use.
Mocking dependencies in Go
We all use a lot of packages when constructing our applications, both internally developed and third party packages. This blog post will show how you can easily mock these packages using mockery and stretchr/testify/mock.
SFTP deployment, backup, and download programme
Created to serve the need for uploading, downloading and backing up website code for WordPress sites which only support SFTP access. Backup routine saves files to .tar.gz file without intermediate step of saving remote files locally and then tarring that folder. Upload will take configured folders and upload to designated spots in the remote system. Download will do a similar but reversed operation to the upload. Each step is configurable in terms of the local and remote locations to act upon. Integrates with SSH Agent or Pageant (on Windows) for SSH Key-based authentication, but also supports Password authentication as a fallback.
GoReleaser
Go Releaser - Deliver Go binaries as fast and easily as possible.
GoReleaser builds Go binaries for several platforms, creates a GitHub release and then pushes a Homebrew formula to a repository. All that wrapped in your favorite CI.
vFlow released v0.3.2 - Enterprise Network Flow Collector :: IPFIX, sFlow, Netflow
High-performance, scalable and reliable IPFIX, sFlow and Netflow collector.
Features
- IPFIX RFC7011 collector
- sFLow v5 raw header packet collector
- Netflow v9 (Beta)
- Decoding sFlow raw header L2/L3/L4
- Produce to Apache Kafka, NSQ
- Replicate IPFIX to 3rd party collector
- Supports IPv4 and IPv6
Leveraging Interfaces in Golang - Part 1
In my previous blog post on using golang in production, I have mentioned that interfaces are my favorite feature in golang.
As a follow-up of this comment, I would like to share how we are using (my current project is also in golang!) the interfaces to keep our code clean and consistent through a series of three blog posts This blog post series assumes that you are familiar with the basics of interfaces in golang. If would like to know what it brings to the table, I strongly recommend to check out this well-written article by Yan Cui.
playgo - a real playful Golang playground
This is the simple version of Go Playground it runs locally with no container needed.
Custom imports can be used.
JSON References
Chances are that if you have not had to deal with JSON data yet, you will. This is a collection of articles and talks that explain how to use encoding/json or one of the other JSON packages.
Elvish - a sophisticated shell implemented in Go
Release 0.9 has just been announced (here and here and here) and to me it already looks quite mature and really promising. One key feature is that pipelines can pass not only text but also other data types like lists, maps, or functions.
(Available on macOS and Linux via Homebrew/Linuxbrew: brew install --HEAD elvish. Currently, without --HEAD, brew installs v0.8.)
Golangflow is now open source!
I'm Releasing the Golangflow source out to the wild! - Github
This site is built using the awesome web framework Buffalo created by Mark Bates. It's been amazing learning the framework coming from Rails background and having Mark help me every step of the way. Have fun and contributions are most welcome :)
Explanation of Goroutines
What are Goroutines?
Goroutines are functions or methods that run concurrently with other functions or methods. Goroutines can be thought of as light weight threads. The cost of creating a Goroutine is tiny when compared to a thread. Hence its common for Go applications to have thousands of Goroutines running concurrently.
Movio - Improving with sql and chart
Since we began our transition from Scala to Go, we discovered that when there's no right tool for the job, we can make a rough one ourselves in an hour or two. If it makes sense we can iterate on it until it becomes something the whole team can use, then the whole company, and then, sometimes, the whole world.
In this blog post, I'd like to share two of these tools: sql and chart, that we've been using a lot lately. Together, they compose an interesting pattern for tinkering with multiple databases individually or concurrently within the terminal.
Go tooling in action ( video )
Go tooling in action by Francesc Campoy (JustForFunc)
For a workshop form of this video check this out: source code
goman - the missing man pages for Go binaries
Most Go binaries come without any man page. On the other hand, most Go projects include a README file. So why not substituting that readme file for a man page? The tool goman does exactly this. Starting from the binary, goman figures out where the source code is, and renders the README file to the terminal - even with colors if the README is Markdown-formatted.
Basic testing patterns in Go
What should I test? What you need to test in Go is really not much different from any other programming language. Except maybe that you need to take extra care with pointers if you are not coming from that background. Generally I advocate testing on all levels. Which in practice only means that you need to care for testing not only on the top level layers (e.g. your HTTP endpoints), but also ensure that the underlying structures are also well covered.
Multiplexing Golang Channels to Maximize Throughput
The Go language is great for concurrency, but when you have to do work that is naturally serial, must you forgo those benefits? We faced this question while rewriting our database backup utility, mongodump, and utilized a “divide-and-multiplex” method to marry a high-throughput concurrent workload with a serial output.
Pegomock, a mocking framework for Go
https://github.com/petergtz/pegomock
PegoMock is a mocking framework for the Go programming language. It integrates well with Go's built-in testing package, but can be used in other contexts too. It is based on golang/mock, but uses a DSL closely related to Mockito.