Reorganize code

src/api/http_util.rs

@@ -0,0 +1,82 @@
+use core::pin::Pin;
+use core::task::{Context, Poll};
+
+use futures::ready;
+use futures::stream::*;
+use hyper::body::{Bytes, HttpBody};
+
+use crate::error::Error;
+
+type StreamType = Pin<Box<dyn Stream<Item = Result<Bytes, Error>> + Send>>;
+
+pub struct StreamBody {
+	stream: StreamType,
+}
+
+impl StreamBody {
+	pub fn new(stream: StreamType) -> Self {
+		Self { stream }
+	}
+}
+
+impl HttpBody for StreamBody {
+	type Data = Bytes;
+	type Error = Error;
+
+	fn poll_data(
+		mut self: Pin<&mut Self>,
+		cx: &mut Context,
+	) -> Poll<Option<Result<Bytes, Self::Error>>> {
+		match ready!(self.stream.as_mut().poll_next(cx)) {
+			Some(res) => Poll::Ready(Some(res)),
+			None => Poll::Ready(None),
+		}
+	}
+
+	fn poll_trailers(
+		self: Pin<&mut Self>,
+		_cx: &mut Context,
+	) -> Poll<Result<Option<hyper::HeaderMap<hyper::header::HeaderValue>>, Self::Error>> {
+		Poll::Ready(Ok(None))
+	}
+}
+
+pub struct BytesBody {
+	bytes: Option<Bytes>,
+}
+
+impl BytesBody {
+	pub fn new(bytes: Bytes) -> Self {
+		Self { bytes: Some(bytes) }
+	}
+}
+
+impl HttpBody for BytesBody {
+	type Data = Bytes;
+	type Error = Error;
+
+	fn poll_data(
+		mut self: Pin<&mut Self>,
+		_cx: &mut Context,
+	) -> Poll<Option<Result<Bytes, Self::Error>>> {
+		Poll::Ready(self.bytes.take().map(Ok))
+	}
+
+	fn poll_trailers(
+		self: Pin<&mut Self>,
+		_cx: &mut Context,
+	) -> Poll<Result<Option<hyper::HeaderMap<hyper::header::HeaderValue>>, Self::Error>> {
+		Poll::Ready(Ok(None))
+	}
+}
+
+impl From<String> for BytesBody {
+	fn from(x: String) -> BytesBody {
+		Self::new(Bytes::from(x))
+	}
+}
+impl From<Vec<u8>> for BytesBody {
+	fn from(x: Vec<u8>) -> BytesBody {
+		Self::new(Bytes::from(x))
+	}
+}