1 pub mod pb { 2 tonic::include_proto!("grpc.examples.unaryecho"); 3 } 4 5 use pb::{echo_client::EchoClient, EchoRequest}; 6 use tonic::transport::{Certificate, Channel, ClientTlsConfig, Identity}; 7 8 #[tokio::main] 9 async fn main() -> Result<(), Box<dyn std::error::Error>> { 10 let data_dir = std::path::PathBuf::from_iter([std::env!("CARGO_MANIFEST_DIR"), "data"]); 11 let server_root_ca_cert = std::fs::read_to_string(data_dir.join("tls/ca.pem"))?; 12 let server_root_ca_cert = Certificate::from_pem(server_root_ca_cert); 13 let client_cert = std::fs::read_to_string(data_dir.join("tls/client1.pem"))?; 14 let client_key = std::fs::read_to_string(data_dir.join("tls/client1.key"))?; 15 let client_identity = Identity::from_pem(client_cert, client_key); 16 17 let tls = ClientTlsConfig::new() 18 .domain_name("localhost") 19 .ca_certificate(server_root_ca_cert) 20 .identity(client_identity); 21 22 let channel = Channel::from_static("https://[::1]:50051") 23 .tls_config(tls)? 24 .connect() 25 .await?; 26 27 let mut client = EchoClient::new(channel); 28 29 let request = tonic::Request::new(EchoRequest { 30 message: "hello".into(), 31 }); 32 33 let response = client.unary_echo(request).await?; 34 35 println!("RESPONSE={:?}", response); 36 37 Ok(()) 38 } 39