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 {
say_hello( &self, request: Request<HelloRequest>, ) -> Result<Response<HelloReply>, Status>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]
main() -> Result<(), Box<dyn std::error::Error>>29 async fn main() -> Result<(), Box<dyn std::error::Error>> {
30 let addr = "[::1]:50051".parse().unwrap();
31 let greeter = MyGreeter::default();
32
33 println!("GreeterServer listening on {}", addr);
34
35 let server = Server::builder().add_service(GreeterServer::new(greeter));
36
37 match listenfd::ListenFd::from_env().take_tcp_listener(0)? {
38 Some(listener) => {
39 listener.set_nonblocking(true)?;
40 let listener = tokio_stream::wrappers::TcpListenerStream::new(
41 tokio::net::TcpListener::from_std(listener)?,
42 );
43
44 server.serve_with_incoming(listener).await?;
45 }
46 None => {
47 server.serve(addr).await?;
48 }
49 }
50
51 Ok(())
52 }
53