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rusthyper

How to create a vector of a specific number of Results?

I am trying to send a stream of data with a specific size without the content length header. I believe hyper::body::Body::wrap_stream is what I'm looking for. However, I'm not sure how to extend the example of creating a vector of results given in documentation to incorporate a custom size.

I'm looking for something like this, but I don't know the best way to resolve issues with vec![Ok(0); bytes].

let chunks: Vec<Result<_, std::io::Error>> = vec![Ok(0); bytes];

let stream = futures_util::stream::iter(chunks);

let body = Body::wrap_stream(stream);
Solution

  • The problem here is that Result does not implement Clone so you can't use this syntax to initialize the Vec.

    You can make it work by changing it as follow:

    let mut chunks: Vec<Result<_, std::io::Error>> = Vec::new();
chunks.resize_with(bytes, || Ok(0));

    This way, you initialize independent Result values.