A rust implementation of gRPC, a high performance, open source, general RPC framework that puts mobile and HTTP/2 first.

tonic is a gRPC over HTTP/2 implementation focused on high performance, interoperability, and flexibility. This library was created to have first class support of async/await and to act as a core building block for production systems written in Rust.

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Overview

tonic is composed of three main components: the generic gRPC implementation, the high performance HTTP/2 implementation and the codegen powered by prost. The generic implementation can support any HTTP/2 implementation and any encoding via a set of generic traits. The HTTP/2 implementation is based on hyper, a fast HTTP/1.1 and HTTP/2 client and server built on top of the robust tokio stack. The codegen contains the tools to build clients and servers from protobuf definitions.

Features

• Bi-directional streaming
• High performance async io
• Interoperability
• TLS backed by rustls
• Load balancing
• Custom metadata
• Authentication
• Health Checking

Getting Started

Examples can be found in examples and for more complex scenarios interop may be a good resource as it shows examples of many of the gRPC features.

If you're using rust-analyzer we recommend you set "rust-analyzer.cargo.buildScripts.enable": true to correctly load the generated code.

For IntelliJ IDEA users, please refer to this and enable org.rust.cargo.evaluate.build.scripts experimental feature.

Rust Version

tonic currently works on Rust 1.60 and above as it requires support for the 2018 edition.

$ rustup update
$ cargo build

Dependencies

In order to build tonic >= 0.8.0, you need the protoc Protocol Buffers compiler, along with Protocol Buffers resource files.

Ubuntu

sudo apt update && sudo apt upgrade -y
sudo apt install -y protobuf-compiler libprotobuf-dev

Alpine Linux

sudo apk add protoc protobuf-dev

macOS

Assuming Homebrew is already installed. (If not, see instructions for installing Homebrew on the Homebrew website.)

brew install protobuf

Windows

• Download the latest version of protoc-xx.y-win64.zip from HERE
• Extract the file bin\protoc.exe and put it somewhere in the PATH
• Verify installation by opening a command prompt and enter protoc --version

Tutorials

• The helloworld tutorial provides a basic example of using tonic, perfect for first time users!
• The routeguide tutorial provides a complete example of using tonic and all its features.

Getting Help

First, see if the answer to your question can be found in the API documentation. If the answer is not there, there is an active community in the Tonic Discord channel. We would be happy to try to answer your question. If that doesn't work, try opening an issue with the question.

Project Layout

• tonic: Generic gRPC and HTTP/2 client/server implementation.
• tonic-build: prost based service codegen.
• tonic-types: prost based grpc utility types including support for gRPC Well Known Types.
• tonic-health: Implementation of the standard gRPC health checking service. Also serves as an example of both unary and response streaming.
• tonic-reflection: A tonic based gRPC reflection implementation.
• examples: Example gRPC implementations showing off tls, load balancing and bi-directional streaming.
• interop: Interop tests implementation.

Contributing

🎈 Thanks for your help improving the project! We are so happy to have you! We have a contributing guide to help you get involved in the Tonic project.

License

This project is licensed under the MIT license.

Contribution

Unless you explicitly state otherwise, any contribution intentionally submitted for inclusion in Tonic by you, shall be licensed as MIT, without any additional terms or conditions.