Code Like a Pro in Rust

10 Building an HTTP REST API CLI

This chapter covers

• Deciding which tools and libraries to use
• Designing the CLI
• Declaring the commands
• Implementing the commands
• Implementing requests
• Handling errors gracefully
• Testing our CLI

Continuing the work we did in the previous chapter, we’ll write a CLI tool for the API service we wrote. Using a CLI tool, we’ll demonstrate another way to interact asynchronously in Rust by making HTTP requests with a separate service (which we also wrote). Our CLI tool will provide a convenient way to interact with our todo app backend (the API service). We’ll use Rust’s async features to showcase the basics of writing async Rust from the client side of a client-server relationship.

Writing CLI tools is one way to ...