How can I return a file stream?

[qxqxq]

I have some local image files and video files that I need to read back, any examples? Is yeild used? Thank you very much!

[asonix]

Here's a crate for serving files with actix-web: https://docs.rs/actix-files/latest/actix_files/

[qxqxq]

Hello, this seems to be loading a static file crate, what I need is to read the file in the API and return the file stream, currently I can return a whole file, but not yeild.

// GET api/file/{filename}
pub async fn get_file(filename: web::Path<String>) -> HttpResponse {
    let file_path = std::path::PathBuf::from(env!("HOME")).as_path().
        join(BASE_DIR).join(DATA_PATH).join(&filename.into_inner());
    println!("{:?}", file_path);

    let mut file = fs::File::open(file_path).unwrap();
    // let mut buffer = [0u8; 1024];
    let mut buffer = [0u8; 1000000];
    // let mut buffer: Vec<u8> = Vec::new();
    let ret = file.read(&mut buffer).unwrap();
    println!("{:?}", ret);
    // println!("{:?}", buffer);
    let stream = once(ok::<_, Error>(Bytes::copy_from_slice(&buffer)));
    // println!("{:?}", stream);

    HttpResponse::Ok().streaming(stream)
}

However, the length of the file is unknown. I do not know how to define the length of the buffer, and large files cannot be read all at one time.

[asonix]

actix-files can do that:

async fn get_file(filename: web::Path) -> HttpResponse {
    let file_path = std::path::PathBuf::from(env!("HOME"))
        .as_path()
        .join(BASE_DIR)
        .join(DATA_PATH)
        .join(&filename.into_inner());
    
    let file = actix_files::NamedFile::open_async(file_path).await.unwrap();

    file.into_response()
}

[qxqxq]

// GET api/file/{filename}
pub async fn get_file(req: HttpRequest, filename: web::Path<String>) -> HttpResponse {
    let file_path = std::path::PathBuf::from(env!("HOME"))
        .as_path()
        .join(BASE_DIR)
        .join(DATA_PATH)
        .join(&filename.into_inner());

    let file = actix_files::NamedFile::open_async(file_path).await.unwrap();

    file.into_response(&req)

}

Thank you very much!