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use crate::BadRequest;
use async_graphql::http::MultipartOptions;
use async_graphql::{ObjectType, Schema, SubscriptionType};
use futures::TryStreamExt;
use std::io;
use std::io::ErrorKind;
use std::sync::Arc;
use warp::http::Method;
use warp::reply::Response as WarpResponse;
use warp::{Buf, Filter, Rejection, Reply};
pub fn graphql<Query, Mutation, Subscription>(
schema: Schema<Query, Mutation, Subscription>,
) -> impl Filter<
Extract = ((
Schema<Query, Mutation, Subscription>,
async_graphql::Request,
),),
Error = Rejection,
> + Clone
where
Query: ObjectType + Send + Sync + 'static,
Mutation: ObjectType + Send + Sync + 'static,
Subscription: SubscriptionType + Send + Sync + 'static,
{
graphql_opts(schema, Default::default())
}
pub fn graphql_opts<Query, Mutation, Subscription>(
schema: Schema<Query, Mutation, Subscription>,
opts: MultipartOptions,
) -> impl Filter<
Extract = ((
Schema<Query, Mutation, Subscription>,
async_graphql::Request,
),),
Error = Rejection,
> + Clone
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::method())
.and(warp::query::raw().or(warp::any().map(String::new)).unify())
.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(
|method,
query: String,
content_type,
body,
opts: Arc<MultipartOptions>,
schema| async move {
if method == Method::GET {
let request: async_graphql::Request = serde_urlencoded::from_str(&query)
.map_err(|err| warp::reject::custom(BadRequest(err.into())))?;
Ok::<_, Rejection>((schema, request))
} else {
let request = async_graphql::http::receive_body(
content_type,
futures::TryStreamExt::map_err(body, |err| io::Error::new(ErrorKind::Other, err))
.map_ok(|mut buf| Buf::to_bytes(&mut buf))
.into_async_read(),
MultipartOptions::clone(&opts),
)
.await
.map_err(|err| warp::reject::custom(BadRequest(err.into())))?;
Ok::<_, Rejection>((schema, request))
}
},
)
}
pub struct Response(async_graphql::Response);
impl From<async_graphql::Response> for Response {
fn from(resp: async_graphql::Response) -> Self {
Response(resp)
}
}
fn add_cache_control(http_resp: &mut WarpResponse, resp: &async_graphql::Response) {
if resp.is_ok() {
if let Some(cache_control) = resp.cache_control.value() {
if let Ok(value) = cache_control.parse() {
http_resp.headers_mut().insert("cache-control", value);
}
}
}
}
impl Reply for Response {
fn into_response(self) -> WarpResponse {
let mut resp = warp::reply::with_header(
warp::reply::json(&self.0),
"content-type",
"application/json",
)
.into_response();
add_cache_control(&mut resp, &self.0);
resp
}
}