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#![forbid(unsafe_code)]
mod subscription;
pub use subscription::WSSubscription;
use actix_web::dev::{Payload, PayloadStream};
use actix_web::http::StatusCode;
use actix_web::{http, web, Error, FromRequest, HttpRequest, HttpResponse, Responder, Result};
use async_graphql::http::MultipartOptions;
use async_graphql::ParseRequestError;
use futures::channel::mpsc;
use futures::future::{self, FutureExt, Ready};
use futures::io::ErrorKind;
use futures::{Future, SinkExt, StreamExt, TryFutureExt, TryStreamExt};
use std::io;
use std::pin::Pin;
pub struct Request(pub async_graphql::Request);
impl Request {
#[must_use]
pub fn into_inner(self) -> async_graphql::Request {
self.0
}
}
type RequestMapper =
fn(<<BatchRequest as FromRequest>::Future as Future>::Output) -> Result<Request>;
impl FromRequest for Request {
type Error = Error;
type Future = future::Map<<BatchRequest as FromRequest>::Future, RequestMapper>;
type Config = MultipartOptions;
fn from_request(req: &HttpRequest, payload: &mut Payload<PayloadStream>) -> Self::Future {
BatchRequest::from_request(req, payload).map(|res| {
res.and_then(|batch| {
batch
.0
.into_single()
.map_err(actix_web::error::ErrorBadRequest)
})
.map(Self)
})
}
}
pub struct BatchRequest(pub async_graphql::BatchRequest);
impl BatchRequest {
#[must_use]
pub fn into_inner(self) -> async_graphql::BatchRequest {
self.0
}
}
impl FromRequest for BatchRequest {
type Error = Error;
type Future = Pin<Box<dyn Future<Output = Result<BatchRequest>>>>;
type Config = MultipartOptions;
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 {
Ok(BatchRequest(
async_graphql::http::receive_batch_body(
content_type,
rx.map_err(|err| io::Error::new(ErrorKind::Other, err))
.into_async_read(),
config,
)
.map_err(|err| match err {
ParseRequestError::PayloadTooLarge => {
actix_web::error::ErrorPayloadTooLarge(err)
}
_ => actix_web::error::ErrorBadRequest(err),
})
.await?,
))
})
}
}
pub struct Response(pub async_graphql::BatchResponse);
impl From<async_graphql::Response> for Response {
fn from(resp: async_graphql::Response) -> Self {
Self(resp.into())
}
}
impl From<async_graphql::BatchResponse> for Response {
fn from(resp: async_graphql::BatchResponse) -> Self {
Self(resp)
}
}
impl Responder for Response {
type Error = Error;
type Future = Ready<Result<HttpResponse>>;
fn respond_to(self, _req: &HttpRequest) -> Self::Future {
let mut res = HttpResponse::build(StatusCode::OK);
res.content_type("application/json");
if self.0.is_ok() {
if let Some(cache_control) = self.0.cache_control().value() {
res.header("cache-control", cache_control);
}
}
futures::future::ok(res.body(serde_json::to_string(&self.0).unwrap()))
}
}