185 lines
5.8 KiB
Rust
185 lines
5.8 KiB
Rust
//! Async-graphql integration with Rocket.
|
|
//!
|
|
//! Note: This integrates with the unreleased version 0.5 of Rocket, and so breaking changes in
|
|
//! both this library and Rocket are to be expected.
|
|
//!
|
|
//! To configure options for sending and receiving multipart requests, add your instance of
|
|
//! `MultipartOptions` to the state managed by Rocket (`.manage(your_multipart_options)`).
|
|
//!
|
|
//! **[Full Example](<https://github.com/async-graphql/examples/blob/master/rocket/starwars/src/main.rs>)**
|
|
|
|
#![warn(missing_docs)]
|
|
#![forbid(unsafe_code)]
|
|
|
|
use std::io::Cursor;
|
|
|
|
use async_graphql::http::MultipartOptions;
|
|
use async_graphql::{ObjectType, ParseRequestError, Schema, SubscriptionType};
|
|
use rocket::{
|
|
data::{self, Data, FromData, ToByteUnit},
|
|
http::{ContentType, Header, Status},
|
|
request::{self, FromQuery},
|
|
response::{self, Responder},
|
|
};
|
|
use serde::de::Deserialize;
|
|
use tokio_util::compat::Tokio02AsyncReadCompatExt;
|
|
|
|
use query_deserializer::QueryDeserializer;
|
|
|
|
mod query_deserializer;
|
|
|
|
/// A batch request which can be extracted from a request's body.
|
|
///
|
|
/// # Examples
|
|
///
|
|
/// ```ignore
|
|
/// #[rocket::post("/graphql", data = "<request>", format = "application/json")]
|
|
/// async fn graphql_request(schema: State<'_, ExampleSchema>, request: BatchRequest) -> Response {
|
|
/// request.execute(&schema).await
|
|
/// }
|
|
/// ```
|
|
#[derive(Debug)]
|
|
pub struct BatchRequest(pub async_graphql::BatchRequest);
|
|
|
|
impl BatchRequest {
|
|
/// Shortcut method to execute the request on the schema.
|
|
pub async fn execute<Query, Mutation, Subscription>(
|
|
self,
|
|
schema: &Schema<Query, Mutation, Subscription>,
|
|
) -> Response
|
|
where
|
|
Query: ObjectType + Send + Sync + 'static,
|
|
Mutation: ObjectType + Send + Sync + 'static,
|
|
Subscription: SubscriptionType + Send + Sync + 'static,
|
|
{
|
|
Response(schema.execute_batch(self.0).await)
|
|
}
|
|
}
|
|
|
|
#[rocket::async_trait]
|
|
impl FromData for BatchRequest {
|
|
type Error = ParseRequestError;
|
|
|
|
async fn from_data(req: &rocket::Request<'_>, data: Data) -> data::Outcome<Self, Self::Error> {
|
|
let opts: MultipartOptions = req.managed_state().copied().unwrap_or_default();
|
|
|
|
let request = async_graphql::http::receive_batch_body(
|
|
req.headers().get_one("Content-Type"),
|
|
data.open(
|
|
req.limits()
|
|
.get("graphql")
|
|
.unwrap_or_else(|| 128.kibibytes()),
|
|
)
|
|
.compat(),
|
|
opts,
|
|
)
|
|
.await;
|
|
|
|
match request {
|
|
Ok(request) => data::Outcome::Success(Self(request)),
|
|
Err(e) => data::Outcome::Failure((
|
|
match e {
|
|
ParseRequestError::PayloadTooLarge => Status::PayloadTooLarge,
|
|
_ => Status::BadRequest,
|
|
},
|
|
e,
|
|
)),
|
|
}
|
|
}
|
|
}
|
|
|
|
/// A GraphQL request which can be extracted from a query string or the request's body.
|
|
///
|
|
/// # Examples
|
|
///
|
|
/// ```ignore
|
|
/// #[rocket::post("/graphql?<query..>")]
|
|
/// async fn graphql_query(schema: State<'_, ExampleSchema>, query: Request) -> Result<Response, Status> {
|
|
/// query.execute(&schema).await
|
|
/// }
|
|
///
|
|
/// #[rocket::post("/graphql", data = "<request>", format = "application/json")]
|
|
/// async fn graphql_request(schema: State<'_, ExampleSchema>, request: Request) -> Result<Response, Status> {
|
|
/// request.execute(&schema).await
|
|
/// }
|
|
/// ```
|
|
#[derive(Debug)]
|
|
pub struct Request(pub async_graphql::Request);
|
|
|
|
impl Request {
|
|
/// Shortcut method to execute the request on the schema.
|
|
pub async fn execute<Query, Mutation, Subscription>(
|
|
self,
|
|
schema: &Schema<Query, Mutation, Subscription>,
|
|
) -> Response
|
|
where
|
|
Query: ObjectType + Send + Sync + 'static,
|
|
Mutation: ObjectType + Send + Sync + 'static,
|
|
Subscription: SubscriptionType + Send + Sync + 'static,
|
|
{
|
|
Response(schema.execute(self.0).await.into())
|
|
}
|
|
}
|
|
|
|
impl<'q> FromQuery<'q> for Request {
|
|
type Error = serde::de::value::Error;
|
|
|
|
fn from_query(query: request::Query<'_>) -> Result<Self, Self::Error> {
|
|
Ok(Self(async_graphql::Request::deserialize(
|
|
QueryDeserializer(query),
|
|
)?))
|
|
}
|
|
}
|
|
|
|
#[rocket::async_trait]
|
|
impl FromData for Request {
|
|
type Error = ParseRequestError;
|
|
|
|
async fn from_data(req: &rocket::Request<'_>, data: Data) -> data::Outcome<Self, Self::Error> {
|
|
BatchRequest::from_data(req, data)
|
|
.await
|
|
.and_then(|request| match request.0.into_single() {
|
|
Ok(single) => data::Outcome::Success(Self(single)),
|
|
Err(e) => data::Outcome::Failure((Status::BadRequest, e)),
|
|
})
|
|
}
|
|
}
|
|
|
|
/// Wrapper around `async-graphql::Response` that is a Rocket responder so it can be returned from
|
|
/// a routing function in Rocket.
|
|
///
|
|
/// It contains a `BatchResponse` but since a response is a type of batch response it works for
|
|
/// both.
|
|
#[derive(Debug)]
|
|
pub struct Response(pub async_graphql::BatchResponse);
|
|
|
|
impl From<async_graphql::BatchResponse> for Response {
|
|
fn from(batch: async_graphql::BatchResponse) -> Self {
|
|
Self(batch)
|
|
}
|
|
}
|
|
impl From<async_graphql::Response> for Response {
|
|
fn from(res: async_graphql::Response) -> Self {
|
|
Self(res.into())
|
|
}
|
|
}
|
|
|
|
impl<'r> Responder<'r, 'static> for Response {
|
|
fn respond_to(self, _: &'r rocket::Request<'_>) -> response::Result<'static> {
|
|
let body = serde_json::to_string(&self.0).unwrap();
|
|
|
|
let mut response = rocket::Response::new();
|
|
|
|
if self.0.is_ok() {
|
|
if let Some(cache_control) = self.0.cache_control().value() {
|
|
response.set_header(Header::new("cache-control", cache_control));
|
|
}
|
|
}
|
|
|
|
response.set_header(ContentType::new("application", "json"));
|
|
response.set_sized_body(body.len(), Cursor::new(body));
|
|
|
|
Ok(response)
|
|
}
|
|
}
|