1 files changed, 75 insertions, 0 deletions
diff --git a/third_party/rust/http-body/src/empty.rs b/third_party/rust/http-body/src/empty.rs
new file mode 100644
index 0000000000..7d63ceb054
--- /dev/null
+++ b/third_party/rust/http-body/src/empty.rs
@@ -0,0 +1,75 @@
+use super::{Body, SizeHint};
+use bytes::Buf;
+use http::HeaderMap;
+use std::{
+    convert::Infallible,
+    fmt,
+    marker::PhantomData,
+    pin::Pin,
+    task::{Context, Poll},
+};
+
+/// A body that is always empty.
+pub struct Empty<D> {
+    _marker: PhantomData<fn() -> D>,
+}
+
+impl<D> Empty<D> {
+    /// Create a new `Empty`.
+    pub fn new() -> Self {
+        Self::default()
+    }
+}
+
+impl<D: Buf> Body for Empty<D> {
+    type Data = D;
+    type Error = Infallible;
+
+    #[inline]
+    fn poll_data(
+        self: Pin<&mut Self>,
+        _cx: &mut Context<'_>,
+    ) -> Poll<Option<Result<Self::Data, Self::Error>>> {
+        Poll::Ready(None)
+    }
+
+    #[inline]
+    fn poll_trailers(
+        self: Pin<&mut Self>,
+        _cx: &mut Context<'_>,
+    ) -> Poll<Result<Option<HeaderMap>, Self::Error>> {
+        Poll::Ready(Ok(None))
+    }
+
+    fn is_end_stream(&self) -> bool {
+        true
+    }
+
+    fn size_hint(&self) -> SizeHint {
+        SizeHint::with_exact(0)
+    }
+}
+
+impl<D> fmt::Debug for Empty<D> {
+    fn fmt(&self, f: &mut fmt::Formatter<'_>) -> fmt::Result {
+        f.debug_struct("Empty").finish()
+    }
+}
+
+impl<D> Default for Empty<D> {
+    fn default() -> Self {
+        Self {
+            _marker: PhantomData,
+        }
+    }
+}
+
+impl<D> Clone for Empty<D> {
+    fn clone(&self) -> Self {
+        Self {
+            _marker: PhantomData,
+        }
+    }
+}
+
+impl<D> Copy for Empty<D> {}