Body from tokio::fs::File

[fredr]

Was it something like this you had in mind @seanmonstar ? In the comment you wrote here: #1357 (review)

Example usage

use tokio::fs::File;

#[tokio::main]
async fn main() -> Result<(), Box<dyn std::error::Error>> {
    let file = File::open("/path/to/file").await?;
    let client = reqwest::Client::new();
    let res = client
        .post("http://localhost:8080/upload")
        .body(file)
        .send()
        .await?;

    println!("{:?}", res);

    Ok(())
}

[fredr]

Or should this be under the stream-feature?

I moved it behind the stream feature flag, that seemed to be a better place for it. Let me know if that was wrong.