请求切换语系出现The connection was closed unexpectedly

uilmas

用一般的HttpWebRequest请求是正常的
代码如下：

[C#] 纯文本查看 复制代码

var cookies = new CookieContainer();

var request = (HttpWebRequest)WebRequest.Create("http://www.maxbet.com/Default.aspx");
request.Referer = "http://www.maxbet.com/";
request.ServicePoint.Expect100Continue = false;
request.CookieContainer = cookies;
request.GetResponse().Close();

var langRequest = (HttpWebRequest)WebRequest.Create("http://www.maxbet.com/ChangeLanguage.aspx");
langRequest.Method = "POST";
langRequest.CookieContainer = cookies;
langRequest.ContentType = "application/x-www-form-urlencoded";
langRequest.Referer = "http://www.maxbet.com/topmenu.aspx";
langRequest.AllowAutoRedirect = false;
            
var postdata = Encoding.Default.GetBytes("hidIsLogin=yes&hidSelLang=cs");
langRequest.ContentLength = postdata.Length;
using (var stream = langRequest.GetRequestStream())
{
    stream.Write(postdata, 0, postdata.Length);
}

Console.WriteLine(new StreamReader(((HttpWebResponse)langRequest.GetResponse()).GetResponseStream()).ReadToEnd());
Console.ReadLine();

打印出：

[C#] 纯文本查看 复制代码

<script> top.window.location.href='./main.aspx?'</script>

换成HttpHelper请求
代码如下：

[C#] 纯文本查看 复制代码

var item = new HttpItem
{
    URL = "http://www.maxbet.com/Default.aspx",
    Referer = "http://www.maxbet.com/",
    Expect100Continue = false
};
var result = (new HttpHelper()).GetHtml(item);

var langItem = new HttpItem
{
    URL = "http://www.maxbet.com/ChangeLanguage.aspx",
    Method = "POST",
    Postdata = "hidIsLogin=yes&hidSelLang=cs",
    Cookie = result.Cookie,
    ContentType = "application/x-www-form-urlencoded",
    Referer = "http://www.maxbet.com/topmenu.aspx",
    Allowautoredirect = false,
};
var langResult = (new HttpHelper()).GetHtml(langItem);

Console.WriteLine(langResult.Html);
Console.ReadLine();

反而出现了下面的错误讯息：

[C#] 纯文本查看 复制代码

The connection was closed unexpectedly

求救！

站长苏飞

抓包比较一下发送的有什么不同，应该是参数的问题

uilmas

搞定了
langItem中设定Expect100Continue = false就可以了
但奇怪的是用HttpWebRequest做ChangeLanguage.aspx请求时
明明就不需要设定也可以请求到资料
怪事阿~真是晕了

uilmas

顺便请教
有什么抓包软体可以抓到vs发出的请求？