Book Image

Rust Standard Library Cookbook

By : Jan Hohenheim, Daniel Durante
Book Image

Rust Standard Library Cookbook

By: Jan Hohenheim, Daniel Durante

Overview of this book

Mozilla’s Rust is gaining much attention with amazing features and a powerful library. This book will take you through varied recipes to teach you how to leverage the Standard library to implement efficient solutions. The book begins with a brief look at the basic modules of the Standard library and collections. From here, the recipes will cover packages that support file/directory handling and interaction through parsing. You will learn about packages related to advanced data structures, error handling, and networking. You will also learn to work with futures and experimental nightly features. The book also covers the most relevant external crates in Rust. By the end of the book, you will be proficient at using the Rust Standard library.
Table of Contents (12 chapters)

How it works...

At the top, we define our structures. Post[11], NewPost [20], and UpdatedPost [29] all just represent convenient ways to handle the different requirements of the API. The particular JSON API we are interacting with uses camelCase variables, so we need to specify this on every struct, otherwise serde won't be able to parse them correctly [10, 19 and 27].

Because the PATCH method we're communicating with doesn't accept null values on unchanged variables, we mark them all in UpdatedPost as not serialized when equal to None [30, 32 and 34]:

#[serde(skip_serializing_if = "Option::is_none")]

Additionally, we implement the fmt::Display trait on Post, so we can print it nicely [43 to 51].

But enough about our models; let's take a look at PostCrud [53]. Its purpose is to abstract a CRUD (Create, Read, Update, Delete) service. For this, it is equipped with a reusable HTTP client via reqwest::Client [57] and a mock JSON API endpoint from https://jsonplaceholder...