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use super::{FromRequest, RequestParts};
use crate::{
body::{box_body, BoxBody},
response::IntoResponse,
};
use async_trait::async_trait;
use http::Response;
use std::convert::Infallible;
#[async_trait]
impl<B> FromRequest<B> for ()
where
B: Send,
{
type Rejection = Infallible;
async fn from_request(_: &mut RequestParts<B>) -> Result<(), Self::Rejection> {
Ok(())
}
}
macro_rules! impl_from_request {
() => {
};
( $head:ident, $($tail:ident),* $(,)? ) => {
#[async_trait]
#[allow(non_snake_case)]
impl<B, $head, $($tail,)*> FromRequest<B> for ($head, $($tail,)*)
where
$head: FromRequest<B> + Send,
$( $tail: FromRequest<B> + Send, )*
B: Send,
{
type Rejection = Response<BoxBody>;
async fn from_request(req: &mut RequestParts<B>) -> Result<Self, Self::Rejection> {
let $head = $head::from_request(req).await.map_err(|err| err.into_response().map(box_body))?;
$( let $tail = $tail::from_request(req).await.map_err(|err| err.into_response().map(box_body))?; )*
Ok(($head, $($tail,)*))
}
}
impl_from_request!($($tail,)*);
};
}
impl_from_request!(T1, T2, T3, T4, T5, T6, T7, T8, T9, T10, T11, T12, T13, T14, T15, T16);