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server.rs
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server.rs
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// Copyright (c) 2013-2015 Sandstorm Development Group, Inc. and contributors
// Licensed under the MIT License:
//
// Permission is hereby granted, free of charge, to any person obtaining a copy
// of this software and associated documentation files (the "Software"), to deal
// in the Software without restriction, including without limitation the rights
// to use, copy, modify, merge, publish, distribute, sublicense, and/or sell
// copies of the Software, and to permit persons to whom the Software is
// furnished to do so, subject to the following conditions:
//
// The above copyright notice and this permission notice shall be included in
// all copies or substantial portions of the Software.
//
// THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
// IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
// FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE
// AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
// LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
// OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN
// THE SOFTWARE.
use capnp::capability::Promise;
use capnp_rpc::{pry, rpc_twoparty_capnp, twoparty, RpcSystem};
use crate::hello_world_capnp::hello_world;
use futures::AsyncReadExt;
use std::net::ToSocketAddrs;
struct HelloWorldImpl;
impl hello_world::Server for HelloWorldImpl {
fn say_hello(
&mut self,
params: hello_world::SayHelloParams,
mut results: hello_world::SayHelloResults,
) -> Promise<(), ::capnp::Error> {
let request = pry!(pry!(params.get()).get_request());
let name = pry!(pry!(request.get_name()).to_str());
let message = format!("Hello, {name}!");
results.get().init_reply().set_message(message);
Promise::ok(())
}
}
pub async fn main() -> Result<(), Box<dyn std::error::Error>> {
let args: Vec<String> = ::std::env::args().collect();
if args.len() != 3 {
println!("usage: {} server ADDRESS[:PORT]", args[0]);
return Ok(());
}
let addr = args[2]
.to_socket_addrs()?
.next()
.expect("could not parse address");
tokio::task::LocalSet::new()
.run_until(async move {
let listener = tokio::net::TcpListener::bind(&addr).await?;
let hello_world_client: hello_world::Client = capnp_rpc::new_client(HelloWorldImpl);
loop {
let (stream, _) = listener.accept().await?;
stream.set_nodelay(true)?;
let (reader, writer) =
tokio_util::compat::TokioAsyncReadCompatExt::compat(stream).split();
let network = twoparty::VatNetwork::new(
futures::io::BufReader::new(reader),
futures::io::BufWriter::new(writer),
rpc_twoparty_capnp::Side::Server,
Default::default(),
);
let rpc_system =
RpcSystem::new(Box::new(network), Some(hello_world_client.clone().client));
tokio::task::spawn_local(rpc_system);
}
})
.await
}