无法使用处理程序和206部分响应

Question

我正在尝试在ASP.NET C＃（v4.5）中编写一个通用处理程序（ Stream.ashx ）来支持206个部分内容响应，以便在流式传输视频时提供更好的用户体验，例如增加对寻求的支持。该页面的使用方式与/Stream.ashx?relative%5cto%5cvideo.mp4类似。

我编写了下面的代码，但是浏览器的HTML5视频播放器无法加载视频，右键单击视频占位符并保存视频，导致视频的精确下载（SHA1哈希匹配）。

为了了解错误，我针对请求和响应运行了 WireShark ，据我所知，一切似乎都有效。初始（200）响应具有accept-ranges：bytes头，然后第二（206）响应具有Accept-Ranges:bytes，Cache-Control:private，Content-Length:183618615，Content-Range:0-183618614/183618615＆amp; Content-Type:video/mp4标题。

我一直试图让这个工作几天，但是无法解决这个问题，我确信当有人指出它为什么不起作用时我会踢自己......

到目前为止我所拥有的：

public void ProcessRequest(HttpContext context)
    {
        HttpRequest request = context.Request;
        HttpResponse response = context.Response;
        response.ClearHeaders();
        response.ClearContent();

        // request sanity checks (e.g. is rootPath accessible, is there a QueryString etc.)
        string requestedFilePath = rootPath + request.QueryString[0];
        if (!File.Exists(requestedFilePath))
        {
            response.StatusCode = 404;
            response.Flush();
            response.End();
            return;
        }
        try
        {
            FileStream test = File.OpenRead(requestedFilePath);
            test.Close();
            test.Dispose();
        }
        catch (UnauthorizedAccessException)
        {
            response.StatusCode = 403;
            response.Flush();
            response.End();
            return;
        }
        response.Headers.Add("Accept-Ranges", "bytes");
        FileInfo aboutFile = new FileInfo(requestedFilePath);
        int length = (int)aboutFile.Length;
        int fullLength = length;
        int startAt = 0;
        int endAt = length - 1;

        if (request.Headers["Range"] != null)
        {
            response.StatusCode = 206;
            response.StatusDescription = "Partial Content";

            string rangeString = request.Headers["Range"];
            rangeString = rangeString.Substring(6);
            string[] rangeParts = rangeString.Split('-');
            startAt = Convert.ToInt32(rangeParts[0]);
            if (rangeString.EndsWith("-"))
            {
                length = fullLength - startAt;
            }
            else
            {
                endAt = Convert.ToInt32(rangeParts[1]);
                length = (endAt - startAt) + 1;
            }
            response.Headers.Add("Content-Range", startAt + "-" + endAt + "/" + fullLength);
        }

        response.Headers.Add("Content-Length", length.ToString());
        response.ContentType = Multimedia.DetectMIMEType(requestedFilePath);
        FileStream fileReader = new FileStream(requestedFilePath, FileMode.Open, FileAccess.Read);
        CreatePartialContent(fileReader, response.OutputStream, startAt, endAt);
        fileReader.Close();
        fileReader.Dispose();
        response.OutputStream.Close();
        try
        {
            response.Flush();
        }
        catch (HttpException) { }
        try
        {
            response.Close();
        }
        catch (HttpException) { }
    }

    private static void CreatePartialContent(FileStream inputStream, System.IO.Stream outputStream, long start, long end)
    {
        int count = 0;
        // 50MiB buffer
        int bufferSize = 52428800;
        long remainingBytes = end - start + 1;
        long position = start;
        byte[] buffer = new byte[bufferSize];

        inputStream.Position = position;
        while (position <= end)
        {
            try
            {
                if (remainingBytes > bufferSize)
                {
                    count = inputStream.Read(buffer, 0, bufferSize);
                }
                else
                {
                    count = inputStream.Read(buffer, 0, (int)remainingBytes);
                }
                outputStream.Write(buffer, 0, count);
            }
            catch (Exception ex)
            {
                break;
            }
            position = inputStream.Position;
            remainingBytes = (end - position) + 1;
        }
    }

提前感谢任何提示！