1 use std::env;
2 use tonic::{service::RoutesBuilder, transport::Server, Request, Response, Status};
3
4 use hello_world::greeter_server::{Greeter, GreeterServer};
5 use hello_world::{HelloReply, HelloRequest};
6
7 use echo::echo_server::{Echo, EchoServer};
8 use echo::{EchoRequest, EchoResponse};
9
10 pub mod hello_world {
11 tonic::include_proto!("helloworld");
12 }
13
14 pub mod echo {
15 tonic::include_proto!("grpc.examples.unaryecho");
16 }
17
18 type EchoResult<T> = Result<Response<T>, Status>;
19
20 #[derive(Default)]
21 pub struct MyEcho {}
22
23 #[tonic::async_trait]
24 impl Echo for MyEcho {
unary_echo(&self, request: Request<EchoRequest>) -> EchoResult<EchoResponse>25 async fn unary_echo(&self, request: Request<EchoRequest>) -> EchoResult<EchoResponse> {
26 println!("Got an echo request from {:?}", request.remote_addr());
27
28 let message = format!("you said: {}", request.into_inner().message);
29
30 Ok(Response::new(EchoResponse { message }))
31 }
32 }
33
init_echo(args: &[String], builder: &mut RoutesBuilder)34 fn init_echo(args: &[String], builder: &mut RoutesBuilder) {
35 let enabled = args.iter().any(|arg| arg.as_str() == "echo");
36 if enabled {
37 println!("Adding Echo service...");
38 let svc = EchoServer::new(MyEcho::default());
39 builder.add_service(svc);
40 }
41 }
42
43 #[derive(Default)]
44 pub struct MyGreeter {}
45
46 #[tonic::async_trait]
47 impl Greeter for MyGreeter {
say_hello( &self, request: Request<HelloRequest>, ) -> Result<Response<HelloReply>, Status>48 async fn say_hello(
49 &self,
50 request: Request<HelloRequest>,
51 ) -> Result<Response<HelloReply>, Status> {
52 println!("Got a greet request from {:?}", request.remote_addr());
53
54 let reply = hello_world::HelloReply {
55 message: format!("Hello {}!", request.into_inner().name),
56 };
57 Ok(Response::new(reply))
58 }
59 }
60
init_greeter(args: &[String], builder: &mut RoutesBuilder)61 fn init_greeter(args: &[String], builder: &mut RoutesBuilder) {
62 let enabled = args.iter().any(|arg| arg.as_str() == "greeter");
63
64 if enabled {
65 println!("Adding Greeter service...");
66 let svc = GreeterServer::new(MyGreeter::default());
67 builder.add_service(svc);
68 }
69 }
70
71 #[tokio::main]
main() -> Result<(), Box<dyn std::error::Error>>72 async fn main() -> Result<(), Box<dyn std::error::Error>> {
73 let args: Vec<String> = env::args().collect();
74 let mut routes_builder = RoutesBuilder::default();
75 init_greeter(&args, &mut routes_builder);
76 init_echo(&args, &mut routes_builder);
77
78 let addr = "[::1]:50051".parse().unwrap();
79
80 println!("Grpc server listening on {}", addr);
81
82 Server::builder()
83 .add_routes(routes_builder.routes())
84 .serve(addr)
85 .await?;
86
87 Ok(())
88 }
89