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#![warn(missing_docs)]
#![forbid(unsafe_code)]
mod subscription;
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::{receive_body, MultipartOptions};
use async_graphql::{ParseRequestError, Request, Response};
use futures::channel::mpsc;
use futures::future::Ready;
use futures::io::ErrorKind;
use futures::{Future, SinkExt, StreamExt, TryFutureExt, TryStreamExt};
use http::Method;
use std::io;
use std::pin::Pin;
pub use subscription::WSSubscription;
pub struct GQLRequest(Request);
impl GQLRequest {
pub fn into_inner(self) -> Request {
self.0
}
}
impl FromRequest for GQLRequest {
type Error = Error;
type Future = Pin<Box<dyn Future<Output = Result<GQLRequest, Error>>>>;
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();
if req.method() == Method::GET {
let res = web::Query::<async_graphql::Request>::from_query(req.query_string());
Box::pin(async move {
let gql_request = res?;
Ok(GQLRequest(gql_request.into_inner()))
})
} else {
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(GQLRequest(
receive_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 GQLResponse(Response);
impl From<Response> for GQLResponse {
fn from(resp: Response) -> 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(&self.0).unwrap());
futures::future::ok(res)
}
}
fn add_cache_control(builder: &mut HttpResponseBuilder, resp: &Response) {
if resp.is_ok() {
if let Some(cache_control) = resp.cache_control.value() {
builder.header("cache-control", cache_control);
}
}
}