1 use tonic::{transport::Server, Request, Response, Status}; 2 3 use hello_world::greeter_server::{Greeter, GreeterServer}; 4 use hello_world::{HelloReply, HelloRequest}; 5 6 pub mod hello_world { 7 tonic::include_proto!("helloworld"); 8 } 9 10 #[derive(Default)] 11 pub struct MyGreeter {} 12 13 #[tonic::async_trait] 14 impl Greeter for MyGreeter { 15 async fn say_hello( 16 &self, 17 request: Request<HelloRequest>, 18 ) -> Result<Response<HelloReply>, Status> { 19 println!("Got a request from {:?}", request.remote_addr()); 20 21 let reply = hello_world::HelloReply { 22 message: format!("Hello {}!", request.into_inner().name), 23 }; 24 Ok(Response::new(reply)) 25 } 26 } 27 28 #[tokio::main] 29 async fn main() -> Result<(), Box<dyn std::error::Error>> { 30 tracing_subscriber::fmt::init(); 31 32 let addr = "127.0.0.1:3000".parse().unwrap(); 33 34 let greeter = MyGreeter::default(); 35 let greeter = GreeterServer::new(greeter); 36 37 println!("GreeterServer listening on {}", addr); 38 39 Server::builder() 40 // GrpcWeb is over http1 so we must enable it. 41 .accept_http1(true) 42 .add_service(tonic_web::enable(greeter)) 43 .serve(addr) 44 .await?; 45 46 Ok(()) 47 } 48