HttpWebRequest.GetResponse：“底层连接已关闭：接收时发生意外错误。”

发布于 2024-09-09 04:25:22 字数 1355 浏览 5 评论 0原文

我编写了一个 C# Windows 服务（.NET Framework 3.5、C# 3.0），用于发布文件和内容。 HTML 表单信息发送到远程服务器，然后将 XML 服务器响应存储在数据库中。以下是相关代码的主要部分：

    HttpWebRequest request = WebRequest.Create(postUrl) as HttpWebRequest;

    request.ProtocolVersion = HttpVersion.Version10;
    request.KeepAlive = false;
    request.Timeout = 600000;
    request.ReadWriteTimeout = 600000;
    request.Method = "POST";
    request.ContentType = contentType;
    request.UserAgent = userAgent;
    request.CookieContainer = new CookieContainer();
    request.ContentLength = formData.Length;

    using (Stream requestStream = request.GetRequestStream())
    {
        // Push it out there
        requestStream.Write(formData, 0, formData.Length);
        requestStream.Close();
    }

    return request.GetResponse() as HttpWebResponse;

我的服务适用于所有小文件，但当我尝试发送较大文件 (8-9 MB) 时，出现以下错误。

    The underlying connection was closed: An unexpected error occurred on a receive.

我使用 Fiddler 查看了传出请求，并能够收集到以下信息：

    HTTP/1.1 504 Fiddler - Receive Failure
    Content-Type: text/html
    Connection: close
    Timestamp: 12:25:04.067

    ReadResponse() failed: The server did not return a response for this request.

在我调用 request.GetResponse() 后大约 7 分钟发生故障。有什么办法可以识别是谁关闭了连接吗？我还应该尝试其他什么方法来解决这个问题吗？提前致谢！

原文

I've written a C# Windows service (.NET Framework 3.5, C# 3.0) that posts files & HTML form information to a remote server, and then stores the XML server response in a database. Here is the main chunk of pertinent code:

    HttpWebRequest request = WebRequest.Create(postUrl) as HttpWebRequest;

    request.ProtocolVersion = HttpVersion.Version10;
    request.KeepAlive = false;
    request.Timeout = 600000;
    request.ReadWriteTimeout = 600000;
    request.Method = "POST";
    request.ContentType = contentType;
    request.UserAgent = userAgent;
    request.CookieContainer = new CookieContainer();
    request.ContentLength = formData.Length;

    using (Stream requestStream = request.GetRequestStream())
    {
        // Push it out there
        requestStream.Write(formData, 0, formData.Length);
        requestStream.Close();
    }

    return request.GetResponse() as HttpWebResponse;

My service works properly for all small files, but I get the following error when I try to send larger files (8-9 MB).

    The underlying connection was closed: An unexpected error occurred on a receive.

I looked at the outgoing request using Fiddler, and was able to glean the following info:

    HTTP/1.1 504 Fiddler - Receive Failure
    Content-Type: text/html
    Connection: close
    Timestamp: 12:25:04.067

    ReadResponse() failed: The server did not return a response for this request.

The failure occurs ~7 minutes after I call request.GetResponse(). Is there any way to identify who shut down the connection? And is there anything else I should try on my end to resolve this issue? Thanks in advance!

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