Book Image

Go: Design Patterns for Real-World Projects

By : Vladimir Vivien, Mario Castro Contreras, Mat Ryer
Book Image

Go: Design Patterns for Real-World Projects

By: Vladimir Vivien, Mario Castro Contreras, Mat Ryer

Overview of this book

The Go programming language has firmly established itself as a favorite for building complex and scalable system applications. Go offers a direct and practical approach to programming that lets programmers write correct and predictable code using concurrency idioms and a full-featured standard library. This practical guide is full of real-world examples to help you get started with Go in no time at all. You’ll start by understanding the fundamentals of Go, then get a detailed description of the Go data types, program structures, and Maps. After that, you’ll learn how to use Go concurrency idioms to avoid pitfalls and create programs that are exact in expected behavior. Next, you will get familiar with the tools and libraries that are available in Go to write and exercise tests, benchmarking, and code coverage. After that, you will be able to utilize some of the most important features of GO such as Network Programming and OS integration to build efficient applications. Then you’ll start applying your skills to build some amazing projects in Go. You will learn to develop high-quality command-line tools that utilize the powerful shell capabilities and perform well using Go’s built-in concurrency mechanisms. Scale, performance, and high availability lie at the heart of our projects, and the lessons learned throughout the sections will arm you with everything you need to build world-class solutions. You will get a feel for app deployment using Docker and Google App Engine. Each project could form the basis of a start-up, which means they are directly applicable to modern software markets. With these skills in hand, you will be able to conquer all your fears of application development and go on to build large, robust and succinct apps in Go. This Learning Path combines some of the best that Packt has to offer in one complete, curated package. It includes content from the following Packt products: 1. Learning Go Programming 2. Go Design Patterns 3. Go Programming Blueprints, Second Edition
Table of Contents (38 chapters)
Go: Design Patterns for Real-World Projects
Credits
Preface
Bibliography

Understanding the request


The http.Request object gives us access to every piece of information we might need about the underlying HTTP request; therefore, it is worth glancing through the net/http documentation to really get a feel for its power. Examples include, but are not limited to, the following:

  • The URL, path, and query string

  • The HTTP method

  • Cookies

  • Files

  • Form values

  • The referrer and user agent of requester

  • Basic authentication details

  • The request body

  • The header information

There are a few things it doesn't address, which we need to either solve ourselves or look to an external package to help us with. URL path parsing is one such example – while we can access a path (such as /people/1/books/2) as a string via the http.Request type's URL.Path field, there is no easy way to pull out the data encoded in the path, such as the people ID of 1 or the book ID of  2.

Note

A few projects do a good job of addressing this problem, such as Goweb or Gorillz's mux package. They let you map path patterns...