The middleware blocks content streaming

[alexanderm39]

Hi

Test code 1:

private static HttpClient Client { get; } = new HttpClient();
[HttpGet]
public async Task<FileStreamResult> Get()
{
    var stream = await Client.GetStreamAsync("http://ipv4.download.thinkbroadband.com/1GB.zip");

    return new FileStreamResult(stream, new MediaTypeHeaderValue("application/octet-stream"))
    {
        FileDownloadName = "bigfile.zip"
    };
}

Test code 2:

public async Task Post()
{
    var httpWriter = new StreamWriter(Response.Body);

    Response.ContentType = "text/event-stream";

    byte[] header = Encoding.ASCII.GetBytes("HELLO\n");

    await Response.Body.WriteAsync(header, 0, header.Length);

    await httpWriter.FlushAsync();

    try
    {
            await Run(httpWriter);
    }
    catch (Exception ex)
    {
        await httpWriter.WriteLineAsync(ex.ToString());
    }
}

private async Task Run(StreamWriter httpWriter)
{
    for (int i = 0; i < 50; i++)
    {
        await httpWriter.WriteAsync($"data: {i}\n\n");
        await httpWriter.FlushAsync();
        await Task.Delay(300);
    }
}

[Taritsyn]

Hello, Alex!

Thanks for information! This problem will require serious and long-term research.

But it seems to me, that the best variant for you would be to split your functionality into two web applications: user interface and streaming.

[Taritsyn]

Hello, Alex!

Try to upgrade to version 2.4.4.