Struct axum::body::StreamBody

pub struct StreamBody<S> { /* private fields */ }

An http_body::Body created from a Stream.

The purpose of this type is to be used in responses. If you want to extract the request body as a stream consider using BodyStream.

Example

use axum::{
    Router,
    routing::get,
    body::StreamBody,
    response::IntoResponse,
};
use futures_util::stream::{self, Stream};
use std::io;

async fn handler() -> StreamBody<impl Stream<Item = io::Result<&'static str>>> {
    let chunks: Vec<io::Result<_>> = vec![
        Ok("Hello,"),
        Ok(" "),
        Ok("world!"),
    ];
    let stream = stream::iter(chunks);
    StreamBody::new(stream)
}

let app = Router::new().route("/", get(handler));

Implementations

impl<S> StreamBody<S>

pub fn new(stream: S) -> Self

where S: TryStream + Send + 'static, S::Ok: Into<Bytes>, S::Error: Into<BoxError>,

Create a new StreamBody from a Stream.

Trait Implementations

impl<S> Body for StreamBody<S>

where S: TryStream, S::Ok: Into<Bytes>, S::Error: Into<BoxError>,

type Data = Bytes

Values yielded by the Body.

type Error = Error

The error type this Body might generate.

fn poll_data( self: Pin<&mut Self>, cx: &mut Context<'_> ) -> Poll<Option<Result<Self::Data, Self::Error>>>

Attempt to pull out the next data buffer of this stream.

fn poll_trailers( self: Pin<&mut Self>, _cx: &mut Context<'_> ) -> Poll<Result<Option<HeaderMap>, Self::Error>>

Poll for an optional single HeaderMap of trailers.

fn is_end_stream(&self) -> bool

Returns true when the end of stream has been reached.

fn size_hint(&self) -> SizeHint

Returns the bounds on the remaining length of the stream.

fn map_data<F, B>(self, f: F) -> MapData<Self, F>

where Self: Sized, F: FnMut(Self::Data) -> B, B: Buf,

Maps this body’s data value to a different value.

fn map_err<F, E>(self, f: F) -> MapErr<Self, F>

where Self: Sized, F: FnMut(Self::Error) -> E,

Maps this body’s error value to a different value.

fn collect(self) -> Collect<Self>

where Self: Sized,

Turn this body into Collected body which will collect all the DATA frames and trailers.

impl<S> Debug for StreamBody<S>

fn fmt(&self, f: &mut Formatter<'_>) -> Result

Formats the value using the given formatter.

impl Default for StreamBody<Empty<Result<Bytes, Error>>>

fn default() -> Self

Returns the “default value” for a type.

impl<S> From<S> for StreamBody<S>

where S: TryStream + Send + 'static, S::Ok: Into<Bytes>, S::Error: Into<BoxError>,

fn from(stream: S) -> Self

Converts to this type from the input type.

impl<S> IntoResponse for StreamBody<S>

where S: TryStream + Send + 'static, S::Ok: Into<Bytes>, S::Error: Into<BoxError>,

fn into_response(self) -> Response

Create a response.

impl<'__pin, S> Unpin for StreamBody<S>

where __Origin<'__pin, S>: Unpin,