210 lines
7.0 KiB
Rust
210 lines
7.0 KiB
Rust
//! Async-graphql integration with Wrap
|
|
|
|
#![warn(missing_docs)]
|
|
#![allow(clippy::type_complexity)]
|
|
#![allow(clippy::needless_doctest_main)]
|
|
|
|
use async_graphql::http::StreamBody;
|
|
use async_graphql::{
|
|
IntoQueryBuilder, IntoQueryBuilderOpts, ObjectType, QueryBuilder, Schema, SubscriptionType,
|
|
WebSocketTransport,
|
|
};
|
|
use bytes::Bytes;
|
|
use futures::select;
|
|
use futures::{SinkExt, StreamExt};
|
|
use std::sync::Arc;
|
|
use warp::filters::ws::Message;
|
|
use warp::filters::BoxedFilter;
|
|
use warp::reject::Reject;
|
|
use warp::{Filter, Rejection, Reply};
|
|
|
|
/// Bad request error
|
|
///
|
|
/// It's a wrapper of `async_graphql::ParseRequestError`.
|
|
pub struct BadRequest(pub async_graphql::ParseRequestError);
|
|
|
|
impl std::fmt::Debug for BadRequest {
|
|
fn fmt(&self, f: &mut std::fmt::Formatter<'_>) -> std::fmt::Result {
|
|
write!(f, "{}", self.0)
|
|
}
|
|
}
|
|
|
|
impl Reject for BadRequest {}
|
|
|
|
/// GraphQL request filter
|
|
///
|
|
/// It outputs a tuple containing the `Schema` and `QuertBuilder`.
|
|
///
|
|
/// # Examples
|
|
/// *[Full Example](<https://github.com/sunli829/async-graphql-examples/blob/master/warp/starwars/src/main.rs>)*
|
|
///
|
|
/// ```no_run
|
|
///
|
|
/// use async_graphql::*;
|
|
/// use warp::{Filter, Reply};
|
|
/// use std::convert::Infallible;
|
|
/// use async_graphql::http::GQLResponse;
|
|
///
|
|
/// struct QueryRoot;
|
|
///
|
|
/// #[Object]
|
|
/// impl QueryRoot {
|
|
/// #[field]
|
|
/// async fn value(&self, ctx: &Context<'_>) -> i32 {
|
|
/// unimplemented!()
|
|
/// }
|
|
/// }
|
|
///
|
|
/// #[tokio::main]
|
|
/// async fn main() {
|
|
/// let schema = Schema::new(QueryRoot, EmptyMutation, EmptySubscription);
|
|
/// let filter = async_graphql_warp::graphql(schema).and_then(|(schema, builder): (_, QueryBuilder)| async move {
|
|
/// let resp = builder.execute(&schema).await;
|
|
/// Ok::<_, Infallible>(warp::reply::json(&GQLResponse(resp)).into_response())
|
|
/// });
|
|
/// warp::serve(filter).run(([0, 0, 0, 0], 8000)).await;
|
|
/// }
|
|
/// ```
|
|
pub fn graphql<Query, Mutation, Subscription>(
|
|
schema: Schema<Query, Mutation, Subscription>,
|
|
) -> BoxedFilter<((Schema<Query, Mutation, Subscription>, QueryBuilder),)>
|
|
where
|
|
Query: ObjectType + Send + Sync + 'static,
|
|
Mutation: ObjectType + Send + Sync + 'static,
|
|
Subscription: SubscriptionType + Send + Sync + 'static,
|
|
{
|
|
warp::any()
|
|
.and(warp::post())
|
|
.and(warp::header::optional::<String>("content-type"))
|
|
.and(warp::body::stream())
|
|
.and(warp::any().map(move || schema.clone()))
|
|
.and_then(|content_type, body, schema| async move {
|
|
let builder = (content_type, StreamBody::new(body))
|
|
.into_query_builder()
|
|
.await
|
|
.map_err(|err| warp::reject::custom(BadRequest(err)))?;
|
|
Ok::<_, Rejection>((schema, builder))
|
|
})
|
|
.boxed()
|
|
}
|
|
|
|
/// Similar to graphql, but you can set the options `IntoQueryBuilderOpts`.
|
|
pub fn graphql_opts<Query, Mutation, Subscription>(
|
|
schema: Schema<Query, Mutation, Subscription>,
|
|
opts: IntoQueryBuilderOpts,
|
|
) -> BoxedFilter<((Schema<Query, Mutation, Subscription>, QueryBuilder),)>
|
|
where
|
|
Query: ObjectType + Send + Sync + 'static,
|
|
Mutation: ObjectType + Send + Sync + 'static,
|
|
Subscription: SubscriptionType + Send + Sync + 'static,
|
|
{
|
|
let opts = Arc::new(opts);
|
|
warp::any()
|
|
.and(warp::post())
|
|
.and(warp::header::optional::<String>("content-type"))
|
|
.and(warp::body::stream())
|
|
.and(warp::any().map(move || opts.clone()))
|
|
.and(warp::any().map(move || schema.clone()))
|
|
.and_then(
|
|
|content_type, body, opts: Arc<IntoQueryBuilderOpts>, schema| async move {
|
|
let builder = (content_type, StreamBody::new(body))
|
|
.into_query_builder_opts(&opts)
|
|
.await
|
|
.map_err(|err| warp::reject::custom(BadRequest(err)))?;
|
|
Ok::<_, Rejection>((schema, builder))
|
|
},
|
|
)
|
|
.boxed()
|
|
}
|
|
|
|
/// GraphQL subscription filter
|
|
///
|
|
/// # Examples
|
|
///
|
|
/// ```no_run
|
|
/// use async_graphql::*;
|
|
/// use warp::Filter;
|
|
/// use futures::{Stream, StreamExt};
|
|
/// use std::time::Duration;
|
|
///
|
|
/// struct QueryRoot;
|
|
///
|
|
/// #[Object]
|
|
/// impl QueryRoot {}
|
|
///
|
|
/// struct SubscriptionRoot;
|
|
///
|
|
/// #[Subscription]
|
|
/// impl SubscriptionRoot {
|
|
/// #[field]
|
|
/// async fn tick(&self) -> impl Stream<Item = String> {
|
|
/// tokio::time::interval(Duration::from_secs(1)).map(|n| format!("{}", n.elapsed().as_secs_f32()))
|
|
/// }
|
|
/// }
|
|
///
|
|
/// #[tokio::main]
|
|
/// async fn main() {
|
|
/// let schema = Schema::new(QueryRoot, EmptyMutation, SubscriptionRoot);
|
|
/// let filter = async_graphql_warp::graphql_subscription(schema);
|
|
/// warp::serve(filter).run(([0, 0, 0, 0], 8000)).await;
|
|
/// }
|
|
/// ```
|
|
pub fn graphql_subscription<Query, Mutation, Subscription>(
|
|
schema: Schema<Query, Mutation, Subscription>,
|
|
) -> BoxedFilter<(impl Reply,)>
|
|
where
|
|
Query: ObjectType + Sync + Send + 'static,
|
|
Mutation: ObjectType + Sync + Send + 'static,
|
|
Subscription: SubscriptionType + Send + Sync + 'static,
|
|
{
|
|
warp::any()
|
|
.and(warp::ws())
|
|
.and(warp::any().map(move || schema.clone()))
|
|
.map(
|
|
|ws: warp::ws::Ws, schema: Schema<Query, Mutation, Subscription>| {
|
|
ws.on_upgrade(move |websocket| {
|
|
let (mut tx, rx) = websocket.split();
|
|
let (mut stx, srx) =
|
|
schema.subscription_connection(WebSocketTransport::default());
|
|
|
|
let mut rx = rx.fuse();
|
|
let mut srx = srx.fuse();
|
|
|
|
async move {
|
|
loop {
|
|
select! {
|
|
bytes = srx.next() => {
|
|
if let Some(bytes) = bytes {
|
|
if tx
|
|
.send(Message::text(unsafe {
|
|
String::from_utf8_unchecked(bytes.to_vec())
|
|
}))
|
|
.await
|
|
.is_err()
|
|
{
|
|
return;
|
|
}
|
|
} else {
|
|
return;
|
|
}
|
|
}
|
|
msg = rx.next() => {
|
|
if let Some(Ok(msg)) = msg {
|
|
if msg.is_text() {
|
|
if stx.send(Bytes::copy_from_slice(msg.as_bytes())).await.is_err() {
|
|
return;
|
|
}
|
|
}
|
|
}
|
|
}
|
|
}
|
|
}
|
|
}
|
|
})
|
|
},
|
|
).map(|reply| {
|
|
warp::reply::with_header(reply, "Sec-WebSocket-Protocol", "graphql-ws")
|
|
})
|
|
.boxed()
|
|
}
|