Add Jayson actix-web extractor

meilisearch-http/src/extractors/jayson.rs

@@ -0,0 +1,79 @@
+use actix_web::{dev::Payload, web::Json, FromRequest, HttpRequest};
+use futures::ready;
+use jayson::{DeserializeError, DeserializeFromValue};
+use meilisearch_types::error::{Code, ErrorCode, ResponseError};
+use std::{
+    fmt::Debug,
+    future::Future,
+    marker::PhantomData,
+    pin::Pin,
+    task::{Context, Poll},
+};
+
+/// Extractor for typed data from Json request payloads
+/// deserialised by Jayson.
+///
+/// # Extractor
+/// To extract typed data from a request body, the inner type `T` must implement the
+/// [`jayson::DeserializeFromError<E>`] trait. The inner type `E` must implement the
+/// [`ErrorCode`](meilisearch_error::ErrorCode) trait.
+#[derive(Debug)]
+pub struct ValidatedJson<T, E>(pub T, PhantomData<*const E>);
+
+impl<T, E> ValidatedJson<T, E> {
+    pub fn new(data: T) -> Self {
+        ValidatedJson(data, PhantomData)
+    }
+    pub fn into_inner(self) -> T {
+        self.0
+    }
+}
+
+impl<T, E> FromRequest for ValidatedJson<T, E>
+where
+    E: DeserializeError + ErrorCode + 'static,
+    T: DeserializeFromValue<E>,
+{
+    type Error = ResponseError;
+    type Future = ValidatedJsonExtractFut<T, E>;
+
+    #[inline]
+    fn from_request(req: &HttpRequest, payload: &mut Payload) -> Self::Future {
+        ValidatedJsonExtractFut {
+            fut: Json::<serde_json::Value>::from_request(req, payload),
+            _phantom: PhantomData,
+        }
+    }
+}
+
+pub struct ValidatedJsonExtractFut<T, E> {
+    fut: <Json<serde_json::Value> as FromRequest>::Future,
+    _phantom: PhantomData<*const (T, E)>,
+}
+
+impl<T, E> Future for ValidatedJsonExtractFut<T, E>
+where
+    T: DeserializeFromValue<E>,
+    E: DeserializeError + ErrorCode + 'static,
+{
+    type Output = Result<ValidatedJson<T, E>, ResponseError>;
+
+    fn poll(self: Pin<&mut Self>, cx: &mut Context<'_>) -> Poll<Self::Output> {
+        let this = self.get_mut();
+
+        let res = ready!(Pin::new(&mut this.fut).poll(cx));
+
+        let res = match res {
+            Err(err) => Err(ResponseError::from_msg(
+                format!("{err}"),
+                Code::MalformedPayload,
+            )),
+            Ok(data) => match jayson::deserialize::<_, _, E>(data.into_inner()) {
+                Ok(data) => Ok(ValidatedJson::new(data)),
+                Err(e) => Err(e.into()),
+            },
+        };
+
+        Poll::Ready(res)
+    }
+}

meilisearch-http/src/extractors/mod.rs

@@ -1,4 +1,5 @@
 pub mod payload;
 #[macro_use]
 pub mod authentication;
+pub mod jayson;
 pub mod sequential_extractor;