unb-server 2.0.0

unb inbound server: Node, request/subscribe handlers, catalog, relay orchestration, accept
Documentation 
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//! WebTransport echo server for the browser integration test (task 5.4).
//!
//! Run: `cargo run -p unb-server --example wt_echo`
//! It prints the URL and certificate hash to export before running
//! `wasm-pack test --chrome --headless crates/unb-client -- --features webtransport`.

use std::sync::Arc;

use schemars::JsonSchema;
use serde::{Deserialize, Serialize};
use serde_json::{json, Value};
use unb::{handler, HandlerError, Reply, Request};
use unb_server::{HostConfig, Node, WebTransportConfig};

#[derive(Deserialize, Serialize, JsonSchema)]
#[serde(transparent)]
struct EchoPayload(Value);

/// Echo the request payload back.
#[handler]
async fn echo(request: Request<EchoPayload>) -> Result<Reply<Value>, HandlerError> {
    Ok(Reply::new(json!({ "echo": request.payload() })))
}

#[tokio::main]
async fn main() {
    let node: Arc<Node> = Node::builder("wt-echo")
        .service(echo)
        .insecure_accept_declared_peer_identities()
        .build()
        .unwrap();

    let hosting = HostConfig::new(([127, 0, 0, 1], 4433))
        .with_webtransport(WebTransportConfig::self_signed_for_development(["localhost"]).unwrap())
        .start(&node)
        .await
        .unwrap();
    let hash = hosting
        .development_cert_hash()
        .unwrap()
        .iter()
        .map(|byte| format!("{byte:02x}"))
        .collect::<String>();

    println!(
        "UNB_WT_URL=https://{}",
        hosting.webtransport_addr().unwrap()
    );
    println!("UNB_WT_CERT_HASH={hash}");

    node.cancellation().child_token().cancelled().await;
}