[−][src]Function tokio::io::stream_reader
pub fn stream_reader<S, B>(stream: S) -> StreamReader<S, B> where
S: Stream<Item = Result<B, Error>>,
B: Buf,
Convert a stream of byte chunks into an AsyncRead
.
Example
use bytes::Bytes; use tokio::io::{stream_reader, AsyncReadExt}; // Create a stream from an iterator. let stream = tokio::stream::iter(vec![ Ok(Bytes::from_static(&[0, 1, 2, 3])), Ok(Bytes::from_static(&[4, 5, 6, 7])), Ok(Bytes::from_static(&[8, 9, 10, 11])), ]); // Convert it to an AsyncRead. let mut read = stream_reader(stream); // Read five bytes from the stream. let mut buf = [0; 5]; read.read_exact(&mut buf).await?; assert_eq!(buf, [0, 1, 2, 3, 4]); // Read the rest of the current chunk. assert_eq!(read.read(&mut buf).await?, 3); assert_eq!(&buf[..3], [5, 6, 7]); // Read the next chunk. assert_eq!(read.read(&mut buf).await?, 4); assert_eq!(&buf[..4], [8, 9, 10, 11]); // We have now reached the end. assert_eq!(read.read(&mut buf).await?, 0);