Question

当我尝试在.NET 3.5上运行它时，以下代码会挂起（当我将项目设置为.NET 4时，它会起作用）

（我等了2分钟 - 似乎冻结了）

        HttpWebRequest l_oRequest;
        HttpWebResponse l_oResponse;

        if (m_bLoggedIn)
            return true;

        m_oSession = new SSessionIdentifier();
        m_oSession.Cookies = new CookieContainer();

        string l_sHost = "https://website.com";

        // Start the login sequence
        l_oRequest = GetNewRequest(l_sHost, "Login.aspx", m_oSession.Cookies);
        l_oRequest.Timeout = 5000;
        l_oRequest.ReadWriteTimeout = 5000;
        l_oRequest.Method = "POST";
        l_oRequest.Referer = "https://website.com";

        // Set form parameters
        string l_sFormParameters = "user=" + m_sUsername;

        // Convert them to the HTTP stream
        byte[] l_oRequestBuffer = UTF8Encoding.ASCII.GetBytes(l_sFormParameters);
        var l_oRequestStream = l_oRequest.GetRequestStream();
        l_oRequestStream.Write(l_oRequestBuffer, 0, l_oRequestBuffer.Length);

        // I'm setting this to false because otherwise i can't get the cookies i want. And I love them cookies!
        l_oRequest.AllowAutoRedirect = false;

        // Now start the redirection sequence until we get to what we want
        int l_iDTPos = -1;
        // This line hangs
        l_oResponse = (HttpWebResponse)l_oRequest.GetResponse();
        while (l_oResponse.StatusCode == HttpStatusCode.Found)
        {
                // Yada Yada

这是GetNewRequest函数：

    private HttpWebRequest GetNewRequest(string host, string targetUrl, CookieContainer a_oCookieJar)
    {
        HttpWebRequest l_oRequest = (HttpWebRequest)HttpWebRequest.Create(host + targetUrl);
        l_oRequest.UserAgent = "Mozilla/5.0 (Windows NT 6.1; WOW64; rv:10.0.2) Gecko/20100101 Firefox/10.0.2";
        l_oRequest.ContentType = "application/x-www-form-urlencoded";
        l_oRequest.AllowAutoRedirect = false;
        l_oRequest.CookieContainer = a_oCookieJar;

        return l_oRequest;
    }

我在文档中找不到3.5和4之间的任何更改。有没有人遇到过这样的问题？

Answer 1

我遇到了同样的问题，我使用HttpWebRequest调用RESTful服务，我的代码在.Net 4+中运行良好，并挂在.Net 3.5,3.0的GetResponse（）行中。 2.0。我最终尝试了本文中的示例代码：

http://msdn.microsoft.com/en-us/library/debx8sh9.aspx

让它在所有版本的.Net中运行。我猜我没有设置正确的东西或关闭资源，但是对于其他任何人来说这样做都会试试这篇文章。

Answer 2

尝试使用以下链接中给出的代码，它使用Stream类来获取httpwebrequest的数据：

http://msdn.microsoft.com/en-us/library/system.net.httpwebresponse.getresponsestream.aspx

http://forums.asp.net/t/1178426.aspx/1

HttpWebRequest.GetResponse（）挂起在.NET 3.5上，但适用于.NET 4

2 个答案: