1 use tonic::{service::LayerExt as _, 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 tracing_subscriber::fmt::init();
31
32 let addr = "127.0.0.1:3000".parse().unwrap();
33
34 let greeter = MyGreeter::default();
35 let greeter = tower::ServiceBuilder::new()
36 .layer(tower_http::cors::CorsLayer::new())
37 .layer(tonic_web::GrpcWebLayer::new())
38 .into_inner()
39 .named_layer(GreeterServer::new(greeter));
40
41 println!("GreeterServer listening on {}", addr);
42
43 Server::builder()
44 // GrpcWeb is over http1 so we must enable it.
45 .accept_http1(true)
46 .add_service(greeter)
47 .serve(addr)
48 .await?;
49
50 Ok(())
51 }
52