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Add axum_core::body::Body
(#1584)
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parent
97885484dd
commit
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1 changed files with 92 additions and 2 deletions
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@ -3,7 +3,11 @@
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use crate::{BoxError, Error};
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use bytes::Bytes;
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use bytes::{Buf, BufMut};
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use http_body::Body;
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use futures_util::stream::Stream;
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use http::HeaderMap;
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use http_body::Body as _;
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use std::pin::Pin;
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use std::task::{Context, Poll};
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/// A boxed [`Body`] trait object.
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///
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@ -55,7 +59,7 @@ where
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// THE SOFTWARE.
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pub(crate) async fn to_bytes<T>(body: T) -> Result<Bytes, T::Error>
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where
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T: Body,
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T: http_body::Body,
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{
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futures_util::pin_mut!(body);
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@ -85,6 +89,92 @@ where
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Ok(vec.into())
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}
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/// The body type used in axum requests and responses.
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#[derive(Debug)]
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pub struct Body(BoxBody);
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impl Body {
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/// Create a new `Body` that wraps another [`http_body::Body`].
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pub fn new<B>(body: B) -> Self
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where
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B: http_body::Body<Data = Bytes> + Send + 'static,
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B::Error: Into<BoxError>,
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{
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try_downcast(body).unwrap_or_else(|body| Self(boxed(body)))
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}
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/// Create an empty body.
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pub fn empty() -> Self {
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Self::new(http_body::Empty::new())
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}
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}
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impl Default for Body {
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fn default() -> Self {
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Self::empty()
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}
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}
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macro_rules! body_from_impl {
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($ty:ty) => {
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impl From<$ty> for Body {
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fn from(buf: $ty) -> Self {
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Self::new(http_body::Full::from(buf))
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}
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}
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};
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}
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body_from_impl!(&'static [u8]);
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body_from_impl!(std::borrow::Cow<'static, [u8]>);
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body_from_impl!(Vec<u8>);
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body_from_impl!(&'static str);
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body_from_impl!(std::borrow::Cow<'static, str>);
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body_from_impl!(String);
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body_from_impl!(Bytes);
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impl http_body::Body for Body {
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type Data = Bytes;
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type Error = Error;
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#[inline]
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fn poll_data(
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mut self: Pin<&mut Self>,
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cx: &mut Context<'_>,
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) -> std::task::Poll<Option<Result<Self::Data, Self::Error>>> {
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Pin::new(&mut self.0).poll_data(cx)
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}
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#[inline]
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fn poll_trailers(
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mut self: Pin<&mut Self>,
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cx: &mut Context<'_>,
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) -> std::task::Poll<Result<Option<HeaderMap>, Self::Error>> {
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Pin::new(&mut self.0).poll_trailers(cx)
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}
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#[inline]
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fn size_hint(&self) -> http_body::SizeHint {
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self.0.size_hint()
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}
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#[inline]
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fn is_end_stream(&self) -> bool {
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self.0.is_end_stream()
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}
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}
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impl Stream for Body {
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type Item = Result<Bytes, Error>;
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#[inline]
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fn poll_next(self: Pin<&mut Self>, cx: &mut Context<'_>) -> Poll<Option<Self::Item>> {
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self.poll_data(cx)
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}
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}
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#[test]
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fn test_try_downcast() {
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assert_eq!(try_downcast::<i32, _>(5_u32), Err(5_u32));
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