Book Image

Protocol Buffers Handbook

By : Clément Jean
Book Image

Protocol Buffers Handbook

By: Clément Jean

Overview of this book

Explore how Protocol Buffers (Protobuf) serialize structured data and provides a language-neutral, platform-neutral, and extensible solution. With this guide to mastering Protobuf, you'll build your skills to effectively serialize, transmit, and manage data across diverse platforms and languages. This book will help you enter the world of Protocol Buffers by unraveling the intricate nuances of Protobuf syntax and showing you how to define complex data structures. As you progress, you’ll learn schema evolution, ensuring seamless compatibility as your projects evolve. The book also covers advanced topics such as custom options and plugins, allowing you to tailor validation processes to your specific requirements. You’ll understand how to automate project builds using cutting-edge tools such as Buf and Bazel, streamlining your development workflow. With hands-on projects in Go and Python programming, you’ll learn how to practically apply Protobuf concepts. Later chapters will show you how to integrate data interchange capabilities across different programming languages, enabling efficient collaboration and system interoperability. By the end of this book, you’ll have a solid understanding of Protobuf internals, enabling you to discern when and how to use and redefine your approach to data serialization.
Table of Contents (13 chapters)

Describing data

As we saw, the main purpose of the Protobuf text format is to describe data in a textual representation. In this section, we are going to see the EBNF syntax for each concept in the format. This will be a reference that is similar to what we did in Chapter 2. Similar to what we did there, some details will be omitted to make the whole thing more readable, but all these details can be found on the specification page here: (https://protobuf.dev/reference/protobuf/textformat-spec/).

Scalar values

The most important part of the text format is the definition of scalar values. We already saw some examples at the beginning of this chapter, but we are going to talk about some details here:

Code example 1 – Scalar field syntax

ScalarValue  = String
             | Float
             | Identifier
    ...