Book Image

Echo Quick Start Guide

By : Ben Huson
Book Image

Echo Quick Start Guide

By: Ben Huson

Overview of this book

Echo is a leading framework for creating web applications with the Go language.  This book will show you how to develop scalable real-world web apps, RESTful services, and backend systems with Echo.  After a thorough understanding of the basics, you'll be introduced to all the concepts for a building real-world web system with Echo. You will start with the the Go HTTP standard library, and setting up your work environment. You will move on to Echo handlers, group routing, data binding, and middleware processing. After that, you will learn how to test your Go application and use templates.  By the end of this book you will be able to build your very own high performance apps using Echo. A Quick Start Guide is a focussed, shorter title which provides a faster paced introduction to a technology. They are for people who don’t need all the detail at this point in their learning curve. The presentation has been streamlined to concentrate on the things you really need to know, rather than everything.
Table of Contents (10 chapters)

Rendering

As mentioned previously, the job of a web application or an API is to create an HTTP response message, given an HTTP request message. Echo has a really nice facility to help us render responses from our handlers and middleware functions. echo.Context has methods which perform all of the heavy hitting for rendering responses back to the caller. As seen in prior examples, there is a JSON method on the Echo Context which allows for rendering of a JSON payload back to the caller. The following is a list of supported rendering capabilities within Echo:

  • HTML: Render an HTML response:

    • HTMLBlob: Render a preformed HTML response

  • JSON: Render a JSON response, converting the variable into JSON based on the struct tags of the variable:

    • JSONBlob: Render a preformed JSON response

    • JSONPretty: Render a pretty JSON response

    • JSONP: Render a JSONP response based on the struct...