Developing a REST API Server

Powerful Command-Line Applications in Go — by Ricardo Gerardi (85 / 127)

👈 Chapter 8 Talking to REST APIs | TOC | Testing the REST API Server 👉

Let’s build an API for our command-line tool to talk to. To save some time, you’ll create a REST API server that exposes data from the to-do API you developed in ​Defining the To-Do API​. It will let users view, add, and modify to-do items using HTTP methods. You’ll reuse the code you developed before by importing the package todo from the module pragprog.com/rggo/interacting/todo.

Start by creating the directory structure for the server under your book’s root directory:

​ ​$ ​​mkdir​​ ​​-p​​ ​​$HOME/pragprog.com/rggo/apis/todoServer​
​ ​$ ​​cd​​ ​​$HOME/pragprog.com/rggo/apis/todoServer​

Then, initialize the Go module for this project:

​ ​$ ​​cd​​ ​​$HOME/pragprog.com/rggo/apis/todoServer​
​ ​$ ​​go​​ ​​mod​​ ​​init​​ ​​pragprog.com/rggo/apis/todoServer​
​ go: creating new go.mod: module pragprog.com/rggo/apis/todoServer

Next, you need to add the pragprog.com/rggo/interacting/todo module dependency to the go.mod file. In a normal workflow, with a module that’s available in a public repository, you don’t need to take additional actions. As explained in ​Go Modules​, by running the go build or go test tools, Go would automatically download the module and add the dependency to the go.mod file. But because we’re using a…