Example tonic gRPC client; this code depends on protocol definitions that are in a *.proto file, not shown here. For more, see the Rust Quick Guide git repository projects, which has a complete tonic "helloworld" server and client.
use hello_world::greeter_client::GreeterClient;
use hello_world::HelloRequest;
pub mod hello_world {
tonic::include_proto!("helloworld");
}
#[tokio::main]
async fn main() -> Result<(), Box<dyn std::error::Error>> {
let mut client = GreeterClient::connect("http://[::1]:50051").await?;
let request = tonic::Request::new(HelloRequest {
name: "Tonic".into(),
});
let response = client.say_hello(request).await?;
println!("RESPONSE={:?}", response);
Ok(())
}