Trait AsyncWriterFactory

Source

pub trait AsyncWriterFactory {
    // Required method
    fn get_writer<'a, 'async_trait>(
        &'a mut self,
        content_length: Option<u64>,
    ) -> Pin<Box<dyn Future<Output = Result<Box<dyn AsyncWrite + Unpin + 'a>>> + Send + 'async_trait>>
       where Self: 'async_trait,
             'a: 'async_trait;
}

Expand description

An AsyncWriterFactory can produce, on demand, an AsyncWrite object. In the event of a download failure, the restarted download will use a fresh writer to restart writing at the beginning.

Required Methods§

Source

fn get_writer<'a, 'async_trait>( &'a mut self, content_length: Option<u64>, ) -> Pin<Box<dyn Future<Output = Result<Box<dyn AsyncWrite + Unpin + 'a>>> + Send + 'async_trait>>
where Self: 'async_trait, 'a: 'async_trait,

Get a fresh AsyncWrite object, positioned at the point where downloaded data should be written.

The content_length parameter holds the response’s Content-Length if it’s known (see content_length). It’s only a hint intended for sizing the writer, and must not be relied upon. It might be None for chunked or decompressed responses, and for a compressed body it reflects the compressed size, so the number of bytes actually written may differ.