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use super::modules::Modules;
use crate::{
database::Database,
schema::{
build_schema,
dap,
CoreSchema,
},
service::{
metrics::metrics,
Config,
},
};
use anyhow::Result;
use async_graphql::{
extensions::Tracing,
http::{
playground_source,
GraphQLPlaygroundConfig,
},
Request,
Response,
};
use axum::{
extract::{
DefaultBodyLimit,
Extension,
},
http::{
header::{
ACCESS_CONTROL_ALLOW_HEADERS,
ACCESS_CONTROL_ALLOW_METHODS,
ACCESS_CONTROL_ALLOW_ORIGIN,
},
HeaderValue,
},
response::{
sse::Event,
Html,
IntoResponse,
Sse,
},
routing::{
get,
post,
},
Json,
Router,
};
use futures::Stream;
use serde_json::json;
use std::net::{
SocketAddr,
TcpListener,
};
use tokio::{
sync::oneshot,
task::JoinHandle,
};
use tokio_stream::StreamExt;
use tower_http::{
set_header::SetResponseHeaderLayer,
trace::TraceLayer,
};
use tracing::info;
pub async fn start_server(
config: Config,
db: Database,
modules: &Modules,
stop: oneshot::Receiver<()>,
) -> Result<(SocketAddr, JoinHandle<Result<()>>)> {
let network_addr = config.addr;
let params = config.chain_conf.transaction_parameters;
let schema = build_schema()
.data(config)
.data(db)
.data(modules.txpool.clone())
.data(modules.block_importer.clone())
.data(modules.block_producer.clone())
.data(modules.sync.clone())
.data(modules.coordinator.clone());
let schema = dap::init(schema, params).extension(Tracing).finish();
let router = Router::new()
.route("/playground", get(graphql_playground))
.route("/graphql", post(graphql_handler).options(ok))
.route(
"/graphql-sub",
post(graphql_subscription_handler).options(ok),
)
.route("/metrics", get(metrics))
.route("/health", get(health))
.layer(Extension(schema))
.layer(TraceLayer::new_for_http())
.layer(SetResponseHeaderLayer::<_>::overriding(
ACCESS_CONTROL_ALLOW_ORIGIN,
HeaderValue::from_static("*"),
))
.layer(SetResponseHeaderLayer::<_>::overriding(
ACCESS_CONTROL_ALLOW_METHODS,
HeaderValue::from_static("*"),
))
.layer(SetResponseHeaderLayer::<_>::overriding(
ACCESS_CONTROL_ALLOW_HEADERS,
HeaderValue::from_static("*"),
))
.layer(DefaultBodyLimit::disable());
let (tx, rx) = tokio::sync::oneshot::channel();
let listener = TcpListener::bind(network_addr)?;
let bound_addr = listener.local_addr().unwrap();
info!("Binding GraphQL provider to {}", bound_addr);
let handle = tokio::spawn(async move {
let server = axum::Server::from_tcp(listener)
.unwrap()
.serve(router.into_make_service())
.with_graceful_shutdown(async move {
let _ = stop.await;
});
tx.send(()).unwrap();
server.await.map_err(Into::into)
});
rx.await.unwrap();
Ok((bound_addr, handle))
}
async fn graphql_playground() -> impl IntoResponse {
Html(playground_source(GraphQLPlaygroundConfig::new("/graphql")))
}
async fn health() -> Json<serde_json::Value> {
Json(json!({ "up": true }))
}
async fn graphql_handler(
schema: Extension<CoreSchema>,
req: Json<Request>,
) -> Json<Response> {
schema.execute(req.0).await.into()
}
async fn graphql_subscription_handler(
schema: Extension<CoreSchema>,
req: Json<Request>,
) -> Sse<impl Stream<Item = Result<Event, serde_json::Error>>> {
let stream = schema
.execute_stream(req.0)
.map(|r| Ok(Event::default().json_data(r).unwrap()));
Sse::new(stream)
.keep_alive(axum::response::sse::KeepAlive::new().text("keep-alive-text"))
}
async fn ok() -> Result<(), ()> {
Ok(())
}