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Modern REST API Development in Go

You're reading from   Modern REST API Development in Go Design performant, secure, and observable web APIs using Go's powerful standard library

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Product type Paperback
Published in Aug 2025
Publisher Packt
ISBN-13 9781836205371
Length 294 pages
Edition 1st Edition
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Author (1):
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Jesús Espino Jesús Espino
Author Profile Icon Jesús Espino
Jesús Espino
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Table of Contents (18) Chapters Close

Preface 1. Introduction to APIs FREE CHAPTER 2. Exploring REST APIs 3. Building a REST Client 4. Designing Your REST API 5. Authentication and Authorization 6. Data Persistency 7. API Security 8. API Performance 9. Deploying Your API 10. Testing 11. Documenting with OpenAPI 12. Metrics, Logs, and Traces 13. Using GORM 14. Using the Echo Framework 15. Unlock Your Book’s Exclusive Benefits 16. Other Books You May Enjoy
17. Index

Building your API client

We will build a simple client with an elementary API server here. In this case, the API server will be an API that returns a random number between 1 and 100, allows the seed to be set, and has a login process.

For that, we are going to need three endpoints. The first one is /random, which will receive a GET request and return JSON containing the random value like this: {"value": 42}. The second one will be /seed, which will receive a POST request with a JSON body containing the seed like this: {"seed": 123}. And the last one will be /login, which will receive a POST request with a JSON body containing the user and the password like this: {"user": "user", "password": "password"}, and it will return a token.

The following code is for the API server. You don’t need to understand it now, but you can take a look at it if you want. It is not a good code example, so don’t take it as...

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