web-applications - WebClient.UploadFile失败，出现 "The request was aborted: The request was canceled."

Question

我正在尝试使用WebClient.UploadFile将文件上传到HTTP URL。对于1M，2M等小文件，上传成功。但是对于12M之类的大文件，我遇到了以下异常:

The request was aborted: The request was canceled.

有人遇到过这个问题吗？您能否分享解决方案？

一些信息:

服务器正在使用ASP.NET 3.5。

我在上传中使用的HTTP方法是“PUT”。

Answer 1

这是smwikipedia的答案中提到的解决方案。我添加了禁用写流缓冲的功能，这可以帮助解决内存不足的异常。

public class ExtendedWebClient : WebClient
{
    public int Timeout { get; set; }
    public new bool AllowWriteStreamBuffering { get; set; }

    protected override WebRequest GetWebRequest(Uri address)
    {
        var request = base.GetWebRequest(address);
        if (request != null)
        {
            request.Timeout = Timeout;
            var httpRequest = request as HttpWebRequest;
            if (httpRequest != null)
            {
                httpRequest.AllowWriteStreamBuffering = AllowWriteStreamBuffering;
            }
        }
        return request;
    }

    public ExtendedWebClient()
    {
        Timeout = 100000; // the standard HTTP Request Timeout default
    }
}

用法:

var webClient = new ExtendedWebClient();
webClient.Timeout = Timeout.Infinite;
webClient.AllowWriteStreamBuffering = false;
webClient.UploadFile(url, filePath);