Adding upstream version 115.7.0esr.upstream/115.7.0esrupstream

Signed-off-by: Daniel Baumann <daniel.baumann@progress-linux.org>

1 files changed, 731 insertions, 0 deletions

diff --git a/third_party/rust/hyper/src/proto/h1/decode.rs b/third_party/rust/hyper/src/proto/h1/decode.rs
new file mode 100644
index 0000000000..1e3a38effc
--- /dev/null
+++ b/third_party/rust/hyper/src/proto/h1/decode.rs
@@ -0,0 +1,731 @@
+use std::error::Error as StdError;
+use std::fmt;
+use std::io;
+use std::usize;
+
+use bytes::Bytes;
+use tracing::{debug, trace};
+
+use crate::common::{task, Poll};
+
+use super::io::MemRead;
+use super::DecodedLength;
+
+use self::Kind::{Chunked, Eof, Length};
+
+/// Decoders to handle different Transfer-Encodings.
+///
+/// If a message body does not include a Transfer-Encoding, it *should*
+/// include a Content-Length header.
+#[derive(Clone, PartialEq)]
+pub(crate) struct Decoder {
+    kind: Kind,
+}
+
+#[derive(Debug, Clone, Copy, PartialEq)]
+enum Kind {
+    /// A Reader used when a Content-Length header is passed with a positive integer.
+    Length(u64),
+    /// A Reader used when Transfer-Encoding is `chunked`.
+    Chunked(ChunkedState, u64),
+    /// A Reader used for responses that don't indicate a length or chunked.
+    ///
+    /// The bool tracks when EOF is seen on the transport.
+    ///
+    /// Note: This should only used for `Response`s. It is illegal for a
+    /// `Request` to be made with both `Content-Length` and
+    /// `Transfer-Encoding: chunked` missing, as explained from the spec:
+    ///
+    /// > If a Transfer-Encoding header field is present in a response and
+    /// > the chunked transfer coding is not the final encoding, the
+    /// > message body length is determined by reading the connection until
+    /// > it is closed by the server.  If a Transfer-Encoding header field
+    /// > is present in a request and the chunked transfer coding is not
+    /// > the final encoding, the message body length cannot be determined
+    /// > reliably; the server MUST respond with the 400 (Bad Request)
+    /// > status code and then close the connection.
+    Eof(bool),
+}
+
+#[derive(Debug, PartialEq, Clone, Copy)]
+enum ChunkedState {
+    Size,
+    SizeLws,
+    Extension,
+    SizeLf,
+    Body,
+    BodyCr,
+    BodyLf,
+    Trailer,
+    TrailerLf,
+    EndCr,
+    EndLf,
+    End,
+}
+
+impl Decoder {
+    // constructors
+
+    pub(crate) fn length(x: u64) -> Decoder {
+        Decoder {
+            kind: Kind::Length(x),
+        }
+    }
+
+    pub(crate) fn chunked() -> Decoder {
+        Decoder {
+            kind: Kind::Chunked(ChunkedState::Size, 0),
+        }
+    }
+
+    pub(crate) fn eof() -> Decoder {
+        Decoder {
+            kind: Kind::Eof(false),
+        }
+    }
+
+    pub(super) fn new(len: DecodedLength) -> Self {
+        match len {
+            DecodedLength::CHUNKED => Decoder::chunked(),
+            DecodedLength::CLOSE_DELIMITED => Decoder::eof(),
+            length => Decoder::length(length.danger_len()),
+        }
+    }
+
+    // methods
+
+    pub(crate) fn is_eof(&self) -> bool {
+        matches!(self.kind, Length(0) | Chunked(ChunkedState::End, _) | Eof(true))
+    }
+
+    pub(crate) fn decode<R: MemRead>(
+        &mut self,
+        cx: &mut task::Context<'_>,
+        body: &mut R,
+    ) -> Poll<Result<Bytes, io::Error>> {
+        trace!("decode; state={:?}", self.kind);
+        match self.kind {
+            Length(ref mut remaining) => {
+                if *remaining == 0 {
+                    Poll::Ready(Ok(Bytes::new()))
+                } else {
+                    let to_read = *remaining as usize;
+                    let buf = ready!(body.read_mem(cx, to_read))?;
+                    let num = buf.as_ref().len() as u64;
+                    if num > *remaining {
+                        *remaining = 0;
+                    } else if num == 0 {
+                        return Poll::Ready(Err(io::Error::new(
+                            io::ErrorKind::UnexpectedEof,
+                            IncompleteBody,
+                        )));
+                    } else {
+                        *remaining -= num;
+                    }
+                    Poll::Ready(Ok(buf))
+                }
+            }
+            Chunked(ref mut state, ref mut size) => {
+                loop {
+                    let mut buf = None;
+                    // advances the chunked state
+                    *state = ready!(state.step(cx, body, size, &mut buf))?;
+                    if *state == ChunkedState::End {
+                        trace!("end of chunked");
+                        return Poll::Ready(Ok(Bytes::new()));
+                    }
+                    if let Some(buf) = buf {
+                        return Poll::Ready(Ok(buf));
+                    }
+                }
+            }
+            Eof(ref mut is_eof) => {
+                if *is_eof {
+                    Poll::Ready(Ok(Bytes::new()))
+                } else {
+                    // 8192 chosen because its about 2 packets, there probably
+                    // won't be that much available, so don't have MemReaders
+                    // allocate buffers to big
+                    body.read_mem(cx, 8192).map_ok(|slice| {
+                        *is_eof = slice.is_empty();
+                        slice
+                    })
+                }
+            }
+        }
+    }
+
+    #[cfg(test)]
+    async fn decode_fut<R: MemRead>(&mut self, body: &mut R) -> Result<Bytes, io::Error> {
+        futures_util::future::poll_fn(move |cx| self.decode(cx, body)).await
+    }
+}
+
+impl fmt::Debug for Decoder {
+    fn fmt(&self, f: &mut fmt::Formatter<'_>) -> fmt::Result {
+        fmt::Debug::fmt(&self.kind, f)
+    }
+}
+
+macro_rules! byte (
+    ($rdr:ident, $cx:expr) => ({
+        let buf = ready!($rdr.read_mem($cx, 1))?;
+        if !buf.is_empty() {
+            buf[0]
+        } else {
+            return Poll::Ready(Err(io::Error::new(io::ErrorKind::UnexpectedEof,
+                                      "unexpected EOF during chunk size line")));
+        }
+    })
+);
+
+impl ChunkedState {
+    fn step<R: MemRead>(
+        &self,
+        cx: &mut task::Context<'_>,
+        body: &mut R,
+        size: &mut u64,
+        buf: &mut Option<Bytes>,
+    ) -> Poll<Result<ChunkedState, io::Error>> {
+        use self::ChunkedState::*;
+        match *self {
+            Size => ChunkedState::read_size(cx, body, size),
+            SizeLws => ChunkedState::read_size_lws(cx, body),
+            Extension => ChunkedState::read_extension(cx, body),
+            SizeLf => ChunkedState::read_size_lf(cx, body, *size),
+            Body => ChunkedState::read_body(cx, body, size, buf),
+            BodyCr => ChunkedState::read_body_cr(cx, body),
+            BodyLf => ChunkedState::read_body_lf(cx, body),
+            Trailer => ChunkedState::read_trailer(cx, body),
+            TrailerLf => ChunkedState::read_trailer_lf(cx, body),
+            EndCr => ChunkedState::read_end_cr(cx, body),
+            EndLf => ChunkedState::read_end_lf(cx, body),
+            End => Poll::Ready(Ok(ChunkedState::End)),
+        }
+    }
+    fn read_size<R: MemRead>(
+        cx: &mut task::Context<'_>,
+        rdr: &mut R,
+        size: &mut u64,
+    ) -> Poll<Result<ChunkedState, io::Error>> {
+        trace!("Read chunk hex size");
+
+        macro_rules! or_overflow {
+            ($e:expr) => (
+                match $e {
+                    Some(val) => val,
+                    None => return Poll::Ready(Err(io::Error::new(
+                        io::ErrorKind::InvalidData,
+                        "invalid chunk size: overflow",
+                    ))),
+                }
+            )
+        }
+
+        let radix = 16;
+        match byte!(rdr, cx) {
+            b @ b'0'..=b'9' => {
+                *size = or_overflow!(size.checked_mul(radix));
+                *size = or_overflow!(size.checked_add((b - b'0') as u64));
+            }
+            b @ b'a'..=b'f' => {
+                *size = or_overflow!(size.checked_mul(radix));
+                *size = or_overflow!(size.checked_add((b + 10 - b'a') as u64));
+            }
+            b @ b'A'..=b'F' => {
+                *size = or_overflow!(size.checked_mul(radix));
+                *size = or_overflow!(size.checked_add((b + 10 - b'A') as u64));
+            }
+            b'\t' | b' ' => return Poll::Ready(Ok(ChunkedState::SizeLws)),
+            b';' => return Poll::Ready(Ok(ChunkedState::Extension)),
+            b'\r' => return Poll::Ready(Ok(ChunkedState::SizeLf)),
+            _ => {
+                return Poll::Ready(Err(io::Error::new(
+                    io::ErrorKind::InvalidInput,
+                    "Invalid chunk size line: Invalid Size",
+                )));
+            }
+        }
+        Poll::Ready(Ok(ChunkedState::Size))
+    }
+    fn read_size_lws<R: MemRead>(
+        cx: &mut task::Context<'_>,
+        rdr: &mut R,
+    ) -> Poll<Result<ChunkedState, io::Error>> {
+        trace!("read_size_lws");
+        match byte!(rdr, cx) {
+            // LWS can follow the chunk size, but no more digits can come
+            b'\t' | b' ' => Poll::Ready(Ok(ChunkedState::SizeLws)),
+            b';' => Poll::Ready(Ok(ChunkedState::Extension)),
+            b'\r' => Poll::Ready(Ok(ChunkedState::SizeLf)),
+            _ => Poll::Ready(Err(io::Error::new(
+                io::ErrorKind::InvalidInput,
+                "Invalid chunk size linear white space",
+            ))),
+        }
+    }
+    fn read_extension<R: MemRead>(
+        cx: &mut task::Context<'_>,
+        rdr: &mut R,
+    ) -> Poll<Result<ChunkedState, io::Error>> {
+        trace!("read_extension");
+        // We don't care about extensions really at all. Just ignore them.
+        // They "end" at the next CRLF.
+        //
+        // However, some implementations may not check for the CR, so to save
+        // them from themselves, we reject extensions containing plain LF as
+        // well.
+        match byte!(rdr, cx) {
+            b'\r' => Poll::Ready(Ok(ChunkedState::SizeLf)),
+            b'\n' => Poll::Ready(Err(io::Error::new(
+                io::ErrorKind::InvalidData,
+                "invalid chunk extension contains newline",
+            ))),
+            _ => Poll::Ready(Ok(ChunkedState::Extension)), // no supported extensions
+        }
+    }
+    fn read_size_lf<R: MemRead>(
+        cx: &mut task::Context<'_>,
+        rdr: &mut R,
+        size: u64,
+    ) -> Poll<Result<ChunkedState, io::Error>> {
+        trace!("Chunk size is {:?}", size);
+        match byte!(rdr, cx) {
+            b'\n' => {
+                if size == 0 {
+                    Poll::Ready(Ok(ChunkedState::EndCr))
+                } else {
+                    debug!("incoming chunked header: {0:#X} ({0} bytes)", size);
+                    Poll::Ready(Ok(ChunkedState::Body))
+                }
+            }
+            _ => Poll::Ready(Err(io::Error::new(
+                io::ErrorKind::InvalidInput,
+                "Invalid chunk size LF",
+            ))),
+        }
+    }
+
+    fn read_body<R: MemRead>(
+        cx: &mut task::Context<'_>,
+        rdr: &mut R,
+        rem: &mut u64,
+        buf: &mut Option<Bytes>,
+    ) -> Poll<Result<ChunkedState, io::Error>> {
+        trace!("Chunked read, remaining={:?}", rem);
+
+        // cap remaining bytes at the max capacity of usize
+        let rem_cap = match *rem {
+            r if r > usize::MAX as u64 => usize::MAX,
+            r => r as usize,
+        };
+
+        let to_read = rem_cap;
+        let slice = ready!(rdr.read_mem(cx, to_read))?;
+        let count = slice.len();
+
+        if count == 0 {
+            *rem = 0;
+            return Poll::Ready(Err(io::Error::new(
+                io::ErrorKind::UnexpectedEof,
+                IncompleteBody,
+            )));
+        }
+        *buf = Some(slice);
+        *rem -= count as u64;
+
+        if *rem > 0 {
+            Poll::Ready(Ok(ChunkedState::Body))
+        } else {
+            Poll::Ready(Ok(ChunkedState::BodyCr))
+        }
+    }
+    fn read_body_cr<R: MemRead>(
+        cx: &mut task::Context<'_>,
+        rdr: &mut R,
+    ) -> Poll<Result<ChunkedState, io::Error>> {
+        match byte!(rdr, cx) {
+            b'\r' => Poll::Ready(Ok(ChunkedState::BodyLf)),
+            _ => Poll::Ready(Err(io::Error::new(
+                io::ErrorKind::InvalidInput,
+                "Invalid chunk body CR",
+            ))),
+        }
+    }
+    fn read_body_lf<R: MemRead>(
+        cx: &mut task::Context<'_>,
+        rdr: &mut R,
+    ) -> Poll<Result<ChunkedState, io::Error>> {
+        match byte!(rdr, cx) {
+            b'\n' => Poll::Ready(Ok(ChunkedState::Size)),
+            _ => Poll::Ready(Err(io::Error::new(
+                io::ErrorKind::InvalidInput,
+                "Invalid chunk body LF",
+            ))),
+        }
+    }
+
+    fn read_trailer<R: MemRead>(
+        cx: &mut task::Context<'_>,
+        rdr: &mut R,
+    ) -> Poll<Result<ChunkedState, io::Error>> {
+        trace!("read_trailer");
+        match byte!(rdr, cx) {
+            b'\r' => Poll::Ready(Ok(ChunkedState::TrailerLf)),
+            _ => Poll::Ready(Ok(ChunkedState::Trailer)),
+        }
+    }
+    fn read_trailer_lf<R: MemRead>(
+        cx: &mut task::Context<'_>,
+        rdr: &mut R,
+    ) -> Poll<Result<ChunkedState, io::Error>> {
+        match byte!(rdr, cx) {
+            b'\n' => Poll::Ready(Ok(ChunkedState::EndCr)),
+            _ => Poll::Ready(Err(io::Error::new(
+                io::ErrorKind::InvalidInput,
+                "Invalid trailer end LF",
+            ))),
+        }
+    }
+
+    fn read_end_cr<R: MemRead>(
+        cx: &mut task::Context<'_>,
+        rdr: &mut R,
+    ) -> Poll<Result<ChunkedState, io::Error>> {
+        match byte!(rdr, cx) {
+            b'\r' => Poll::Ready(Ok(ChunkedState::EndLf)),
+            _ => Poll::Ready(Ok(ChunkedState::Trailer)),
+        }
+    }
+    fn read_end_lf<R: MemRead>(
+        cx: &mut task::Context<'_>,
+        rdr: &mut R,
+    ) -> Poll<Result<ChunkedState, io::Error>> {
+        match byte!(rdr, cx) {
+            b'\n' => Poll::Ready(Ok(ChunkedState::End)),
+            _ => Poll::Ready(Err(io::Error::new(
+                io::ErrorKind::InvalidInput,
+                "Invalid chunk end LF",
+            ))),
+        }
+    }
+}
+
+#[derive(Debug)]
+struct IncompleteBody;
+
+impl fmt::Display for IncompleteBody {
+    fn fmt(&self, f: &mut fmt::Formatter<'_>) -> fmt::Result {
+        write!(f, "end of file before message length reached")
+    }
+}
+
+impl StdError for IncompleteBody {}
+
+#[cfg(test)]
+mod tests {
+    use super::*;
+    use std::pin::Pin;
+    use std::time::Duration;
+    use tokio::io::{AsyncRead, ReadBuf};
+
+    impl<'a> MemRead for &'a [u8] {
+        fn read_mem(&mut self, _: &mut task::Context<'_>, len: usize) -> Poll<io::Result<Bytes>> {
+            let n = std::cmp::min(len, self.len());
+            if n > 0 {
+                let (a, b) = self.split_at(n);
+                let buf = Bytes::copy_from_slice(a);
+                *self = b;
+                Poll::Ready(Ok(buf))
+            } else {
+                Poll::Ready(Ok(Bytes::new()))
+            }
+        }
+    }
+
+    impl<'a> MemRead for &'a mut (dyn AsyncRead + Unpin) {
+        fn read_mem(&mut self, cx: &mut task::Context<'_>, len: usize) -> Poll<io::Result<Bytes>> {
+            let mut v = vec![0; len];
+            let mut buf = ReadBuf::new(&mut v);
+            ready!(Pin::new(self).poll_read(cx, &mut buf)?);
+            Poll::Ready(Ok(Bytes::copy_from_slice(&buf.filled())))
+        }
+    }
+
+    #[cfg(feature = "nightly")]
+    impl MemRead for Bytes {
+        fn read_mem(&mut self, _: &mut task::Context<'_>, len: usize) -> Poll<io::Result<Bytes>> {
+            let n = std::cmp::min(len, self.len());
+            let ret = self.split_to(n);
+            Poll::Ready(Ok(ret))
+        }
+    }
+
+    /*
+    use std::io;
+    use std::io::Write;
+    use super::Decoder;
+    use super::ChunkedState;
+    use futures::{Async, Poll};
+    use bytes::{BytesMut, Bytes};
+    use crate::mock::AsyncIo;
+    */
+
+    #[tokio::test]
+    async fn test_read_chunk_size() {
+        use std::io::ErrorKind::{InvalidData, InvalidInput, UnexpectedEof};
+
+        async fn read(s: &str) -> u64 {
+            let mut state = ChunkedState::Size;
+            let rdr = &mut s.as_bytes();
+            let mut size = 0;
+            loop {
+                let result =
+                    futures_util::future::poll_fn(|cx| state.step(cx, rdr, &mut size, &mut None))
+                        .await;
+                let desc = format!("read_size failed for {:?}", s);
+                state = result.expect(desc.as_str());
+                if state == ChunkedState::Body || state == ChunkedState::EndCr {
+                    break;
+                }
+            }
+            size
+        }
+
+        async fn read_err(s: &str, expected_err: io::ErrorKind) {
+            let mut state = ChunkedState::Size;
+            let rdr = &mut s.as_bytes();
+            let mut size = 0;
+            loop {
+                let result =
+                    futures_util::future::poll_fn(|cx| state.step(cx, rdr, &mut size, &mut None))
+                        .await;
+                state = match result {
+                    Ok(s) => s,
+                    Err(e) => {
+                        assert!(
+                            expected_err == e.kind(),
+                            "Reading {:?}, expected {:?}, but got {:?}",
+                            s,
+                            expected_err,
+                            e.kind()
+                        );
+                        return;
+                    }
+                };
+                if state == ChunkedState::Body || state == ChunkedState::End {
+                    panic!("Was Ok. Expected Err for {:?}", s);
+                }
+            }
+        }
+
+        assert_eq!(1, read("1\r\n").await);
+        assert_eq!(1, read("01\r\n").await);
+        assert_eq!(0, read("0\r\n").await);
+        assert_eq!(0, read("00\r\n").await);
+        assert_eq!(10, read("A\r\n").await);
+        assert_eq!(10, read("a\r\n").await);
+        assert_eq!(255, read("Ff\r\n").await);
+        assert_eq!(255, read("Ff   \r\n").await);
+        // Missing LF or CRLF
+        read_err("F\rF", InvalidInput).await;
+        read_err("F", UnexpectedEof).await;
+        // Invalid hex digit
+        read_err("X\r\n", InvalidInput).await;
+        read_err("1X\r\n", InvalidInput).await;
+        read_err("-\r\n", InvalidInput).await;
+        read_err("-1\r\n", InvalidInput).await;
+        // Acceptable (if not fully valid) extensions do not influence the size
+        assert_eq!(1, read("1;extension\r\n").await);
+        assert_eq!(10, read("a;ext name=value\r\n").await);
+        assert_eq!(1, read("1;extension;extension2\r\n").await);
+        assert_eq!(1, read("1;;;  ;\r\n").await);
+        assert_eq!(2, read("2; extension...\r\n").await);
+        assert_eq!(3, read("3   ; extension=123\r\n").await);
+        assert_eq!(3, read("3   ;\r\n").await);
+        assert_eq!(3, read("3   ;   \r\n").await);
+        // Invalid extensions cause an error
+        read_err("1 invalid extension\r\n", InvalidInput).await;
+        read_err("1 A\r\n", InvalidInput).await;
+        read_err("1;no CRLF", UnexpectedEof).await;
+        read_err("1;reject\nnewlines\r\n", InvalidData).await;
+        // Overflow
+        read_err("f0000000000000003\r\n", InvalidData).await;
+    }
+
+    #[tokio::test]
+    async fn test_read_sized_early_eof() {
+        let mut bytes = &b"foo bar"[..];
+        let mut decoder = Decoder::length(10);
+        assert_eq!(decoder.decode_fut(&mut bytes).await.unwrap().len(), 7);
+        let e = decoder.decode_fut(&mut bytes).await.unwrap_err();
+        assert_eq!(e.kind(), io::ErrorKind::UnexpectedEof);
+    }
+
+    #[tokio::test]
+    async fn test_read_chunked_early_eof() {
+        let mut bytes = &b"\
+            9\r\n\
+            foo bar\
+        "[..];
+        let mut decoder = Decoder::chunked();
+        assert_eq!(decoder.decode_fut(&mut bytes).await.unwrap().len(), 7);
+        let e = decoder.decode_fut(&mut bytes).await.unwrap_err();
+        assert_eq!(e.kind(), io::ErrorKind::UnexpectedEof);
+    }
+
+    #[tokio::test]
+    async fn test_read_chunked_single_read() {
+        let mut mock_buf = &b"10\r\n1234567890abcdef\r\n0\r\n"[..];
+        let buf = Decoder::chunked()
+            .decode_fut(&mut mock_buf)
+            .await
+            .expect("decode");
+        assert_eq!(16, buf.len());
+        let result = String::from_utf8(buf.as_ref().to_vec()).expect("decode String");
+        assert_eq!("1234567890abcdef", &result);
+    }
+
+    #[tokio::test]
+    async fn test_read_chunked_trailer_with_missing_lf() {
+        let mut mock_buf = &b"10\r\n1234567890abcdef\r\n0\r\nbad\r\r\n"[..];
+        let mut decoder = Decoder::chunked();
+        decoder.decode_fut(&mut mock_buf).await.expect("decode");
+        let e = decoder.decode_fut(&mut mock_buf).await.unwrap_err();
+        assert_eq!(e.kind(), io::ErrorKind::InvalidInput);
+    }
+
+    #[tokio::test]
+    async fn test_read_chunked_after_eof() {
+        let mut mock_buf = &b"10\r\n1234567890abcdef\r\n0\r\n\r\n"[..];
+        let mut decoder = Decoder::chunked();
+
+        // normal read
+        let buf = decoder.decode_fut(&mut mock_buf).await.unwrap();
+        assert_eq!(16, buf.len());
+        let result = String::from_utf8(buf.as_ref().to_vec()).expect("decode String");
+        assert_eq!("1234567890abcdef", &result);
+
+        // eof read
+        let buf = decoder.decode_fut(&mut mock_buf).await.expect("decode");
+        assert_eq!(0, buf.len());
+
+        // ensure read after eof also returns eof
+        let buf = decoder.decode_fut(&mut mock_buf).await.expect("decode");
+        assert_eq!(0, buf.len());
+    }
+
+    // perform an async read using a custom buffer size and causing a blocking
+    // read at the specified byte
+    async fn read_async(mut decoder: Decoder, content: &[u8], block_at: usize) -> String {
+        let mut outs = Vec::new();
+
+        let mut ins = if block_at == 0 {
+            tokio_test::io::Builder::new()
+                .wait(Duration::from_millis(10))
+                .read(content)
+                .build()
+        } else {
+            tokio_test::io::Builder::new()
+                .read(&content[..block_at])
+                .wait(Duration::from_millis(10))
+                .read(&content[block_at..])
+                .build()
+        };
+
+        let mut ins = &mut ins as &mut (dyn AsyncRead + Unpin);
+
+        loop {
+            let buf = decoder
+                .decode_fut(&mut ins)
+                .await
+                .expect("unexpected decode error");
+            if buf.is_empty() {
+                break; // eof
+            }
+            outs.extend(buf.as_ref());
+        }
+
+        String::from_utf8(outs).expect("decode String")
+    }
+
+    // iterate over the different ways that this async read could go.
+    // tests blocking a read at each byte along the content - The shotgun approach
+    async fn all_async_cases(content: &str, expected: &str, decoder: Decoder) {
+        let content_len = content.len();
+        for block_at in 0..content_len {
+            let actual = read_async(decoder.clone(), content.as_bytes(), block_at).await;
+            assert_eq!(expected, &actual) //, "Failed async. Blocking at {}", block_at);
+        }
+    }
+
+    #[tokio::test]
+    async fn test_read_length_async() {
+        let content = "foobar";
+        all_async_cases(content, content, Decoder::length(content.len() as u64)).await;
+    }
+
+    #[tokio::test]
+    async fn test_read_chunked_async() {
+        let content = "3\r\nfoo\r\n3\r\nbar\r\n0\r\n\r\n";
+        let expected = "foobar";
+        all_async_cases(content, expected, Decoder::chunked()).await;
+    }
+
+    #[tokio::test]
+    async fn test_read_eof_async() {
+        let content = "foobar";
+        all_async_cases(content, content, Decoder::eof()).await;
+    }
+
+    #[cfg(feature = "nightly")]
+    #[bench]
+    fn bench_decode_chunked_1kb(b: &mut test::Bencher) {
+        let rt = new_runtime();
+
+        const LEN: usize = 1024;
+        let mut vec = Vec::new();
+        vec.extend(format!("{:x}\r\n", LEN).as_bytes());
+        vec.extend(&[0; LEN][..]);
+        vec.extend(b"\r\n");
+        let content = Bytes::from(vec);
+
+        b.bytes = LEN as u64;
+
+        b.iter(|| {
+            let mut decoder = Decoder::chunked();
+            rt.block_on(async {
+                let mut raw = content.clone();
+                let chunk = decoder.decode_fut(&mut raw).await.unwrap();
+                assert_eq!(chunk.len(), LEN);
+            });
+        });
+    }
+
+    #[cfg(feature = "nightly")]
+    #[bench]
+    fn bench_decode_length_1kb(b: &mut test::Bencher) {
+        let rt = new_runtime();
+
+        const LEN: usize = 1024;
+        let content = Bytes::from(&[0; LEN][..]);
+        b.bytes = LEN as u64;
+
+        b.iter(|| {
+            let mut decoder = Decoder::length(LEN as u64);
+            rt.block_on(async {
+                let mut raw = content.clone();
+                let chunk = decoder.decode_fut(&mut raw).await.unwrap();
+                assert_eq!(chunk.len(), LEN);
+            });
+        });
+    }
+
+    #[cfg(feature = "nightly")]
+    fn new_runtime() -> tokio::runtime::Runtime {
+        tokio::runtime::Builder::new_current_thread()
+            .enable_all()
+            .build()
+            .expect("rt build")
+    }
+}