从Web服务器按字节块下载大文件

Question

我打算从服务器读取一大块字节到我的客户端说client1，然后将该字节写入另一个属于client2的流。所以基本上Client2直接从client1流式传输，而client1又从Web服务器流式传输。 我想重复这个过程，直到下载完成。

我有一个代码片段用于使用本地文件执行此操作，是否可以使用托管在Web服务器上的文件？

private void GetLocalFile(HttpRequest request) //Request from client2
{
    HttpResponse response = new HttpResponse(request);

    using (FileStream fs = new FileStream(path, FileMode.Open, FileAccess.Read))
    {
        long count;
        if (request.Headers.ContainsKey("range"))
        {
            string[] range = request.Headers["range"].Split('=').Last().Split('-').Select(a => a.Trim()).ToArray();
            long end, start = long.Parse(range[0]);
            if (start < 0)
                start += fs.Length;
            if (range.Length < 2 || !long.TryParse(range[1], out end))
                end = fs.Length - 1;

            count = end - start + 1;
            fs.Position = start;

            response.SetStateCode(206);
            response.AddHreader("Content-Range", string.Format("bytes {0}-{1}/{2}", start, end, fs.Length));
        }
        else
        {
            count = fs.Length;
        }


        response.AddHreader(HttpHeader.ContentLength, count.ToString());
        response.AddHreader(HttpHeader.ContentType, mime.ToString());
        response.AddHreader(HttpHeader.AcceptRanges, "bytes"); 


        response.AddHreader("TransferMode.DLNA.ORG", "Streaming");
        response.AddHreader("ContentFeatures.DLNA.ORG", fileFeature);
        response.SendHeaders();

        if (request.Method == "GET")
        {
            int readed;
            byte[] buffer = new byte[4096];
            Stream responseStream = request.Socket.GetStream(); 

            while ((readed = fs.Read(buffer, 0, buffer.Length)) > 0) 
            {
                readed = (int)Math.Min(readed, count);
                responseStream.Write(buffer, 0, readed); 
                count -= readed;

                if (count <= 0)
                    break;
            }
        }
    }
}