在HttpWebRequest上设置cookie容器会导致超时，但帖子仍然会通过

Question

我有以下代码

CookieContainer container = new CookieContainer();
            HttpCookieCollection oCookies = HttpContext.Current.Request.Cookies;
            for (int j = 0; j < oCookies.Count; j++)
            {
                HttpCookie oCookie = oCookies.Get(j);
                    Cookie oC = new Cookie();
                    // Convert between the System.Net.Cookie to a System.Web.HttpCookie...
                    oC.Domain = HttpContext.Current.Request.Url.Host;
                    oC.Expires = oCookie.Expires;
                    oC.Name = oCookie.Name;
                    oC.Path = oCookie.Path;
                    oC.Secure = oCookie.Secure;
                    oC.Value = oCookie.Value;
                    container.Add(oC);
            }
             HttpWebRequest request = (HttpWebRequest)WebRequest.Create("http://localhost/test.ashx");
            request.ServicePoint.ConnectionLimit = 100;
            request.Timeout = 20000;
            //request.Credentials = CredentialCache.DefaultCredentials;
            request.ServicePoint.Expect100Continue = false;
            request.CookieContainer = container;
            request.Method = "POST";
            string formContent = "requestName=update&objectId=1&parentId=1";
            byte[] byteArray = Encoding.UTF8.GetBytes(formContent);
            request.ContentType = "application/x-www-form-urlencoded";
            request.ContentLength = byteArray.Length;
            using (Stream dataStream = request.GetRequestStream())
            {
                dataStream.Write(byteArray, 0, byteArray.Length);
                dataStream.Flush();
                dataStream.Close();
            }
            try
            {
                var response = request.GetResponse();
                using (var stream = response.GetResponseStream())
                {
                    if (stream == null)
                    {
                        throw new Exception("no response");
                    }
                    using (var sr = new StreamReader(stream))
                    {
                        var content = sr.ReadToEnd();
                    }
                }
            }
            catch (WebException wex)
            {
                var pageContent = new StreamReader(wex.Response.GetResponseStream()).ReadToEnd();
                throw new Exception(pageContent);
            }
        }

我正试图代表用户将数据POST到页面上，这是一个程序化的过程，网站使用表单身份验证，因此代码复制当前cookie，并将容器添加到HttpWebRequest中。当代码运行时，它到达调用request.GetResponse()的行，但此时代码停止，并最终超时。然而，我在它调用的页面的PageLoad上有一个断点，一旦超时，代码就会像预期的那样，用POST和会话cookie中的正确信息到达该页面开头的断点。有人知道为什么会有一个呼叫首先导致超时，或者此时发生了什么吗？

Answer 1

此指令

request.ServicePoint.Expect100Continue = false;

不起作用，因为即使您尝试从HttpRequestHeaders集合中删除Expect标头，该标头也将由实际发出请求时执行的内部"MakeRequestCommand(("添加。

若要解决此问题，可以使用System.Net.ServicePointManager.Expect100Continue属性关闭Expect100Continue行为。

此处的更多解释