How to implement gRPC services in Rust

How to implement gRPC services in Rust

In this article, we will demonstrate how to create a simple gRPC service using the Rust and Proto protocols.

First, we run the following command to create a new Rust application:

cargo new rustgrpc

Then, add dependencies to the Cargo.toml file:

[dependencies]
tonic = "0.11"
tokio = { version = "1", features = ["full"] }
prost = "0.12.4"[build-dependencies]
tonic-build = "0.11"

This example uses the Tonic library, which is a Rust implementation of gRPC. It is a fast, high-performance, open-source, and universal RPC framework that uses the HTTP/2 protocol and supports mobile end! We have defined the dependencies and can now continue writing applications.

Create Proto file

We will create Proto files to handle request messages and response messages. Proto files help clients and servers understand the messages sent and received.

Create a new directory named “protos” in the project root directory and create a new file named “hello.proto”. Write the following content in the file:

syntax = "proto3";package hello;service Greeter {
  rpc SayHello (HelloRequest) returns (HelloReply) {}
}message HelloRequest {
  string name = 1;
}message HelloReply {
  string message = 1;
}