tonic/examples/src/richer-error/client_vec.rs

use tonic_types::{ErrorDetail, StatusExt};

use hello_world::greeter_client::GreeterClient;
use hello_world::HelloRequest;

pub mod hello_world {
    tonic::include_proto!("helloworld");
}

#[tokio::main]
async fn main() -> Result<(), Box<dyn std::error::Error>> {
    let mut client = GreeterClient::connect("http://[::1]:50051").await?;

    let request = tonic::Request::new(HelloRequest {
        // Valid request
        // name: "Tonic".into(),
        // Name cannot be empty
        name: "".into(),
        // Name is too long
        // name: "some excessively long name".into(),
    });

    let response = match client.say_hello(request).await {
        Ok(response) => response,
        Err(status) => {
            println!(" Error status received. Extracting error details...\n");

            let err_details = status.get_error_details_vec();

            for (i, err_detail) in err_details.iter().enumerate() {
                println!("err_detail[{i}]");
                match err_detail {
                    ErrorDetail::BadRequest(bad_request) => {
                        // Handle bad_request details
                        println!(" {:?}", bad_request);
                    }
                    ErrorDetail::Help(help) => {
                        // Handle help details
                        println!(" {:?}", help);
                    }
                    ErrorDetail::LocalizedMessage(localized_message) => {
                        // Handle localized_message details
                        println!(" {:?}", localized_message);
                    }
                    _ => {}
                }
            }

            println!();

            return Ok(());
        }
    };

    println!(" Successfull response received.\n\n {:?}\n", response);

    Ok(())
}