1 pub mod pb { 2 tonic::include_proto!("/grpc.examples.echo"); 3 } 4 5 use pb::{echo_client::EchoClient, EchoRequest}; 6 use tonic::transport::{Certificate, Channel, ClientTlsConfig}; 7 8 #[tokio::main] 9 async fn main() -> Result<(), Box<dyn std::error::Error>> { 10 let pem = tokio::fs::read("examples/data/tls/ca.pem").await?; 11 let ca = Certificate::from_pem(pem); 12 13 let tls = ClientTlsConfig::new() 14 .ca_certificate(ca) 15 .domain_name("example.com"); 16 17 let channel = Channel::from_static("http://[::1]:50051") 18 .tls_config(tls)? 19 .connect() 20 .await?; 21 22 let mut client = EchoClient::new(channel); 23 let request = tonic::Request::new(EchoRequest { 24 message: "hello".into(), 25 }); 26 27 let response = client.unary_echo(request).await?; 28 29 println!("RESPONSE={:?}", response); 30 31 Ok(()) 32 } 33