Question

我必须使用以下代码段将大文件上传到服务器：

static async Task LordNoBugAsync(string token, string filePath, string uri)
{
    HttpWebRequest fileWebRequest = (HttpWebRequest)WebRequest.Create(uri);
    fileWebRequest.Method = "PATCH";
    fileWebRequest.AllowWriteStreamBuffering = false; //this line tells to upload by chunks
    fileWebRequest.ContentType = "application/x-www-form-urlencoded";
    fileWebRequest.Headers["Authorization"] = "PHOENIX-TOKEN " + token;
    fileWebRequest.KeepAlive = false;
    fileWebRequest.Timeout = System.Threading.Timeout.Infinite;
    fileWebRequest.Proxy = null;

    using (FileStream fileStream = File.OpenRead(filePath) )
    {
        fileWebRequest.ContentLength = fileStream.Length; //have to provide length in order to upload by chunks
        int bufferSize = 512000;
        byte[] buffer = new byte[bufferSize];
        int lastBytesRead = 0;
        int byteCount = 0;
        Stream requestStream = fileWebRequest.GetRequestStream();
        requestStream.WriteTimeout = System.Threading.Timeout.Infinite;

        while ((lastBytesRead = fileStream.Read(buffer, 0, bufferSize)) != 0)
        {
            if (lastBytesRead > 0)
            {
                await requestStream.WriteAsync(buffer, 0, lastBytesRead);
                //for some reasons didnt really write to stream, but in fact buffer has content, >60MB                   
                byteCount += bufferSize;
            }
        }
        requestStream.Flush();
        try
        {                    
            requestStream.Close();
            requestStream.Dispose();
        }
        catch
        {
            Console.Write("Error");
        }
        try
        {
            fileStream.Close();
            fileStream.Dispose();
        }
        catch
        {
            Console.Write("Error");
        }
    }
    ...getting response parts...
}

在代码中，我创建了一个HttpWebRequest，并通过缓冲将内容推送到服务器。该代码适用于60MB以下的任何文件。

我尝试了70MB的pdf。缓冲区阵列对于每个缓冲具有不同的内容。然而，请求流似乎没有被写入。 bytecount也达到70M，显示文件已正确读取。

编辑（更多信息）：我在requestStream.Close（）处设置了断点。请求流显然需要大约2分钟才能写入60MB文件，但70MB文件只需要2ms。

我的呼唤：

        Task magic = LordNoBugAsync(token, nameofFile, path);
        magic.Wait();

我确信我的通话是正确的（适用于0B到60MB的文件）。

非常感谢任何建议或建议。

请求流无法写入

0 个答案: