97 lines
3.3 KiB
Rust
97 lines
3.3 KiB
Rust
use std::{io, io::ErrorKind};
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use async_graphql::{http::MultipartOptions, BatchRequest, ObjectType, Schema, SubscriptionType};
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use futures_util::TryStreamExt;
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use warp::{reply::Response as WarpResponse, Buf, Filter, Rejection, Reply};
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use crate::GraphQLBadRequest;
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/// GraphQL batch request filter
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///
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/// It outputs a tuple containing the `async_graphql::Schema` and
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/// `async_graphql::BatchRequest`.
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pub fn graphql_batch<Query, Mutation, Subscription>(
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schema: Schema<Query, Mutation, Subscription>,
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) -> impl Filter<Extract = ((Schema<Query, Mutation, Subscription>, BatchRequest),), Error = Rejection>
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+ Clone
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where
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Query: ObjectType + 'static,
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Mutation: ObjectType + 'static,
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Subscription: SubscriptionType + 'static,
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{
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graphql_batch_opts(schema, Default::default())
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}
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/// Similar to graphql_batch, but you can set the options with
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/// :`async_graphql::MultipartOptions`.
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pub fn graphql_batch_opts<Query, Mutation, Subscription>(
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schema: Schema<Query, Mutation, Subscription>,
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opts: MultipartOptions,
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) -> impl Filter<Extract = ((Schema<Query, Mutation, Subscription>, BatchRequest),), Error = Rejection>
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+ Clone
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where
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Query: ObjectType + 'static,
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Mutation: ObjectType + 'static,
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Subscription: SubscriptionType + 'static,
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{
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warp::any()
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.and(warp::get().and(warp::filters::query::raw()).and_then(
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|query_string: String| async move {
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async_graphql::http::parse_query_string(&query_string)
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.map(Into::into)
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.map_err(|e| warp::reject::custom(GraphQLBadRequest(e)))
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},
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))
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.or(warp::post()
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.and(warp::header::optional::<String>("content-type"))
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.and(warp::body::stream())
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.and_then(move |content_type, body| async move {
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async_graphql::http::receive_batch_body(
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content_type,
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TryStreamExt::map_err(body, |e| io::Error::new(ErrorKind::Other, e))
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.map_ok(|mut buf| {
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let remaining = Buf::remaining(&buf);
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Buf::copy_to_bytes(&mut buf, remaining)
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})
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.into_async_read(),
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opts,
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)
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.await
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.map_err(|e| warp::reject::custom(GraphQLBadRequest(e)))
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}))
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.unify()
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.map(move |res| (schema.clone(), res))
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}
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/// Reply for `async_graphql::BatchRequest`.
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#[derive(Debug)]
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pub struct GraphQLBatchResponse(pub async_graphql::BatchResponse);
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impl From<async_graphql::BatchResponse> for GraphQLBatchResponse {
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fn from(resp: async_graphql::BatchResponse) -> Self {
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GraphQLBatchResponse(resp)
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}
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}
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impl Reply for GraphQLBatchResponse {
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fn into_response(self) -> WarpResponse {
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let mut resp = warp::reply::with_header(
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warp::reply::json(&self.0),
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"content-type",
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"application/json",
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)
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.into_response();
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if self.0.is_ok() {
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if let Some(cache_control) = self.0.cache_control().value() {
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if let Ok(value) = cache_control.try_into() {
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resp.headers_mut().insert("cache-control", value);
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}
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}
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}
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resp.headers_mut().extend(self.0.http_headers());
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resp
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}
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}
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