how to handle image/png to response ?

[goodclouddata]

I want to output the png format to web,How to do this now? set content_type:image/png. if use Result<http::Response<Vec> ,Error> type, tower-web-0.3.3/src/response/context.rs line : 107 WARN: no default serialization format associated with action

[kornholi]

fn foo(&self) -> Result<http::Response<bytes::Bytes>, Error> {
    let png_bytes: Vec<u8> = /* ... */;
    Ok(http::Response::builder()
        .status(200)
        .header(http::header::CONTENT_TYPE, "image/png")
        .body(png_bytes.into())?
    )
}

[goodclouddata]

@kornholl ,Thanks a lot!

[carllerche]

I wonder if there should be some built in types for this kind of stuff...

#[derive(Response)]
#[web(header(name = "content-type", value = "image/png"))]
pub struct Png {
   body: Bytes,
}