Trait StreamingSource 

pub trait StreamingSource {
    type Error: Error + Send + Sync + 'static;

    // Required method
    fn next(
        &mut self,
    ) -> impl Future<Output = Option<Result<Bytes, Self::Error>>> + Send;

    // Provided method
    fn size_hint(
        &self,
    ) -> impl Future<Output = Result<SizeHint, Self::Error>> + Send { ... }
}

Provides bytes from single-pass sources.

Required Associated Types

type Error: Error + Send + Sync + 'static

The error type.

Required Methods

fn next( &mut self, ) -> impl Future<Output = Option<Result<Bytes, Self::Error>>> + Send

Gets the next set of data.

Provided Methods

fn size_hint( &self, ) -> impl Future<Output = Result<SizeHint, Self::Error>> + Send

An estimate of the payload size.

Returns the expected size as a [min, max) range. The maximum may be unknown. If the minimum is unknown use 0.

If the maximum size is known and sufficiently small, the client library may be able to use a more efficient protocol for the upload.

Dyn Compatibility

This trait is not dyn compatible.

In older versions of Rust, dyn compatibility was called "object safety".

Implementors

impl StreamingSource for BytesSource

type Error = Error

impl StreamingSource for FileSource

type Error = Error

impl<T> StreamingSource for Payload<T>

where T: StreamingSource + Send + Sync,

type Error = <T as StreamingSource>::Error