Move body impl, use box dyn error type

opentelemetry-http/src/lib.rs

@@ -108,39 +108,12 @@ pub mod hyper {
     use http_body_util::{BodyExt, Full};
     use hyper::body::{Body as HttpBody, Frame};
     use hyper_util::client::legacy::{connect::Connect, Client};
-    use std::convert::Infallible;
     use std::fmt::Debug;
     use std::pin::Pin;
     use std::task::{self, Poll};
     use std::time::Duration;
     use tokio::time;
 
-    pub struct Body(Full<Bytes>);
-
-    impl HttpBody for Body {
-        type Data = Bytes;
-        type Error = Infallible;
-
-        #[inline]
-        fn poll_frame(
-            self: Pin<&mut Self>,
-            cx: &mut task::Context<'_>,
-        ) -> Poll<Option<Result<Frame<Self::Data>, Self::Error>>> {
-            let inner_body = unsafe { self.map_unchecked_mut(|b| &mut b.0) };
-            inner_body.poll_frame(cx)
-        }
-
-        #[inline]
-        fn is_end_stream(&self) -> bool {
-            self.0.is_end_stream()
-        }
-
-        #[inline]
-        fn size_hint(&self) -> hyper::body::SizeHint {
-            self.0.size_hint()
-        }
-    }
-
     #[derive(Debug, Clone)]
     pub struct HyperClient<C> {
         inner: Client<C, Body>,
@@ -194,6 +167,32 @@ pub mod hyper {
             Ok(http_response.error_for_status()?)
         }
     }
+
+    pub struct Body(Full<Bytes>);
+
+    impl HttpBody for Body {
+        type Data = Bytes;
+        type Error = Box<dyn std::error::Error + Send + Sync + 'static>;
+
+        #[inline]
+        fn poll_frame(
+            self: Pin<&mut Self>,
+            cx: &mut task::Context<'_>,
+        ) -> Poll<Option<Result<Frame<Self::Data>, Self::Error>>> {
+            let inner_body = unsafe { self.map_unchecked_mut(|b| &mut b.0) };
+            inner_body.poll_frame(cx)
+        }
+
+        #[inline]
+        fn is_end_stream(&self) -> bool {
+            self.0.is_end_stream()
+        }
+
+        #[inline]
+        fn size_hint(&self) -> hyper::body::SizeHint {
+            self.0.size_hint()
+        }
+    }
 }
 
 /// Methods to make working with responses from the [`HttpClient`] trait easier.