Calling a SOAP service in Go

 December 3, 2018

Today the IT world is very focused on high performance, high throughput interfaces. In this situation, it is common to find REST and gRPC API, given their performances compared to the other solutions. Sometimes, though, we still encounter old API written with older techniques or new API that for some reasons have been developed with outdated technologies. One of those cases that I’ve encountered a few times over the last few months is SOAP.

CORS with Go and Negroni

 November 18, 2018

There are some pieces that you need to put in every microservice you write. Those are for instance logging, error handling, authentication.

Over the last year, I found myself writing over and over CORS headers. This requirement brought me to think that I should have used a Negroni middleware since we are already using Negroni for other middlewares. I started looking online for an already written one, and I found a bunch, but I was not happy with what I found, so I decided to write my own.

A lightweight approach to Go vanity import paths

 September 23, 2018

Golang uses URLs for the dependencies packages resolution. To unbundle the code repository hosting the package and the import path, Golang supports the idea of Vanity Import Paths. The way this has been implemented is that, as long as the import path points to a page where Go can find the real package URL, it will follow through.

So, we will need to create a web server that can serve pages in a way that the Go toolchains can understand. To do so, I use the following code:

A small HTTP debug server in Go

 August 31, 2018

Lately, I found myself to work on an application that was communicating via SOAP with a server. My goal was to understand how this application worked with the SOAP server to emulate its behavior. Even if I had access to the source code of the application, I thought it would have been easier, faster and more fun to do the work without actually reading the code. It’s important to note that actually, the application is fairly small and self-contained. Otherwise, I would have probably taken a different approach.

An HTTP server to serve GCS files

 April 12, 2018

As many other clouds, Google Cloud Platform provides an Object Storage service, Google Cloud Storage. As many other Object Storage service, Google Cloud Storage provides an HTTP server to deliver your files quickly. When I started to use Google Cloud Storage and its HTTP server I have not been entirely pleased by how it works and therefore I wanted to re-implement the HTTP server so that I can manage it completely.

Walkthrough a PEM file in Go

 December 21, 2017

A few months ago, I posted how to create a PKI in Go. Today I’d like to add share a useful function (at least from my point of view) that I found myself to write.

The problem arose when I had a function that required as input a *pem.Block of the public key, but all I had was the PEM file containing, as you can imagine:

• the Private Key
• the Public Key
• the CA Public Key

I think this is a typical situation, and for this, I’d like to share a function I wrote to extract it. I know that it’s probably not perfect, but it could be a good starting point for many of you, and if you have suggestions, please leave a comment down below or send me an email, and I’ll update the post!

Create a PKI in GoLang

 June 5, 2017

Lately I have been programming quite a bit and - for the first time - I have used Golang doing so. Go is a very nice language and really helped me with the development. One of the reasons why I have enjoyed this much Go is the standard library, which is amazing. I would like to share today the easiness of creating a basic Certificate Authority and signed certificates in Go.