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#![warn(missing_docs)]
mod subscription;
use actix_web::body::BodyStream;
use actix_web::dev::{HttpResponseBuilder, Payload, PayloadStream};
use actix_web::http::StatusCode;
use actix_web::{http, web, Error, FromRequest, HttpRequest, HttpResponse, Responder};
use async_graphql::http::{multipart_stream, StreamBody};
use async_graphql::{
IntoQueryBuilder, IntoQueryBuilderOpts, ParseRequestError, QueryBuilder, QueryResponse,
StreamResponse,
};
use futures::channel::mpsc;
use futures::future::Ready;
use futures::{Future, SinkExt, StreamExt, TryFutureExt};
use std::convert::Infallible;
use std::pin::Pin;
pub use subscription::WSSubscription;
pub struct GQLRequest(QueryBuilder);
impl GQLRequest {
pub fn into_inner(self) -> QueryBuilder {
self.0
}
}
impl FromRequest for GQLRequest {
type Error = Error;
type Future = Pin<Box<dyn Future<Output = Result<GQLRequest, Error>>>>;
type Config = IntoQueryBuilderOpts;
fn from_request(req: &HttpRequest, payload: &mut Payload<PayloadStream>) -> Self::Future {
let config = req.app_data::<Self::Config>().cloned().unwrap_or_default();
let content_type = req
.headers()
.get(http::header::CONTENT_TYPE)
.and_then(|value| value.to_str().ok())
.map(|value| value.to_string());
let (mut tx, rx) = mpsc::channel(16);
let mut payload = web::Payload(payload.take());
actix_rt::spawn(async move {
while let Some(item) = payload.next().await {
if tx.send(item).await.is_err() {
return;
}
}
});
Box::pin(async move {
(content_type, StreamBody::new(rx))
.into_query_builder_opts(&config)
.map_ok(GQLRequest)
.map_err(|err| match err {
ParseRequestError::PayloadTooLarge => {
actix_web::error::ErrorPayloadTooLarge(err)
}
_ => actix_web::error::ErrorBadRequest(err),
})
.await
})
}
}
pub struct GQLResponse(async_graphql::Result<QueryResponse>);
impl From<async_graphql::Result<QueryResponse>> for GQLResponse {
fn from(resp: async_graphql::Result<QueryResponse>) -> Self {
GQLResponse(resp)
}
}
impl Responder for GQLResponse {
type Error = Error;
type Future = Ready<Result<HttpResponse, Error>>;
fn respond_to(self, _req: &HttpRequest) -> Self::Future {
let mut res = HttpResponse::build(StatusCode::OK);
res.content_type("application/json");
add_cache_control(&mut res, &self.0);
let res =
res.body(serde_json::to_string(&async_graphql::http::GQLResponse(self.0)).unwrap());
futures::future::ok(res)
}
}
pub struct GQLResponseStream(StreamResponse);
impl From<StreamResponse> for GQLResponseStream {
fn from(resp: StreamResponse) -> Self {
GQLResponseStream(resp)
}
}
impl Responder for GQLResponseStream {
type Error = Error;
type Future = Ready<Result<HttpResponse, Error>>;
fn respond_to(self, req: &HttpRequest) -> Self::Future {
match self.0 {
StreamResponse::Single(resp) => GQLResponse(resp).respond_to(req),
StreamResponse::Stream(stream) => {
let body =
BodyStream::new(multipart_stream(stream).map(Result::<_, Infallible>::Ok));
let mut res = HttpResponse::build(StatusCode::OK);
res.content_type("multipart/mixed; boundary=\"-\"");
futures::future::ok(res.body(body))
}
}
}
}
fn add_cache_control(
builder: &mut HttpResponseBuilder,
resp: &async_graphql::Result<QueryResponse>,
) {
if let Ok(QueryResponse { cache_control, .. }) = resp {
if let Some(cache_control) = cache_control.value() {
builder.header("cache-control", cache_control);
}
}
}