gRPC-rs

gRPC-rs is a Rust wrapper of gRPC Core. gRPC is a high performance, open source universal RPC framework that puts mobile and HTTP/2 first.

Status

This project is still under development. The following features with the check marks are supported:

• [x] Basic asynchronous unary/steaming call
• [x] SSL
• [x] Generic call
• [x] Connection level compression
• [x] Interoperability test
• [x] QPS benchmark
• [ ] Custom metadata
• [x] Health check
• [ ] Reflection
• [ ] Authentication
• [ ] Load balance

Prerequisites

• CMake >= 3.8.0
• Rust >= 1.19.0
• binutils >= 2.22
• By default, the secure feature is enabled, therefore Go (>=1.7) is required.

For Linux and MacOS, you also need to install gcc (or clang) too.

For Windows, you also need to install following software:

• Active State Perl
• yasm
• Visual Studio 2015+

Build

$ git submodule update --init --recursive # if you just cloned the repository $ cargo build

Error linking OpenSSL

If you're getting linker errors when building your project using gRPC-rs, head down to the openssl feature section for a possible fix.

Usage

To generate the sources from proto files:

Option 1 - Manual Generation

1. Install the protobuf compiler:

$ cargo install protobuf-codegen

1. Install the gRPC compiler:

$ cargo install grpcio-compiler

1. Generate the sources:

$ protoc --rust_out=. --grpc_out=. --plugin=protoc-gen-grpc=`which grpc_rust_plugin` example.proto

Option 2 - Programmatic Generation

Programmatic generation can be used to generate Rust modules from proto files via your build.rs by using protoc-grpcio.

For more information and examples see README.

To include this project as a dependency:

[dependencies] grpcio = "0.4"

Feature secure

secure feature enables support for TLS encryption and some authentication mechanism. When you do not need it, for example when working in intranet, you can disable it by using the following configuration: [dependencies] grpcio = { version = "0.4", default-features = false, features = ["protobuf-codec"] }

Feature openssl

gRPC-rs comes vendored with gRPC Core, which by default uses BoringSSL instead of OpenSSL. This may cause linking issues due to symbol clashes and/or missing symbols when another one of your dependencies uses OpenSSL. To resolve this, you can tell gRPC-rs to use OpenSSL too by specifying "openssl" in your Cargo.toml's features list for gprcio. E.g.:

toml [dependencies] grpcio = { version = "0.4.4", features = ["openssl"] }

Performance

See benchmark to find out how to run a benchmark by yourself.

Cross Compile

See cross_compile