Question

如果将Thread.CurrentThread.CurrentCulture更改为不同于安装的（OS文化），则对HttpWebRequest.GetResponse（）的调用将始终超时。

只是为了澄清，这是我的实用程序类的内容正在做脏工作：

private static void ReplicateCookies(HttpWebRequest request)
{
    if (HttpContext.Current == null)
        return;
    if (request.CookieContainer == null)
        request.CookieContainer = new CookieContainer();
    foreach (var cookie in from object key in HttpContext.Current.Request.Cookies.Keys select HttpContext.Current.Request.Cookies[key.ToString()])
        request.CookieContainer.Add(new Cookie(cookie.Name, cookie.Value, cookie.Path, string.IsNullOrEmpty(cookie.Domain) 
            ? HttpContext.Current.Request.Url.Host
            : cookie.Domain));
}

private HttpWebRequest CreateRequest(string url, string method = null)
{
    var httpRequest = WebRequest.Create(url) as HttpWebRequest;
    ReplicateCookies(httpRequest);
    httpRequest.KeepAlive = false;
    httpRequest.Method = method ?? "GET";
    httpRequest.Timeout = 20000;
    httpRequest.Proxy = null;
    httpRequest.ServicePoint.ConnectionLeaseTimeout = 20000;
    httpRequest.ServicePoint.MaxIdleTime = 10000;
    return httpRequest;
}

public string ReadWebPage(string url)
{
    var oldCulture = Thread.CurrentThread.CurrentCulture.Name;
    Thread.CurrentThread.CurrentCulture = Thread.CurrentThread.CurrentUICulture = new CultureInfo("en-GB");
    string result;
    var httpRequest = CreateRequest(url);
    httpRequest.Headers.Add("Accept-Language", oldCulture);
    try
    {
        using (var httpResponse = httpRequest.GetResponse())
        {
            using (var stream = httpResponse.GetResponseStream())
            {
                using (var reader = new StreamReader(stream, Encoding.UTF8))
                {
                    result = reader.ReadToEnd();
                    reader.Close();
                }
                stream.Flush();
                stream.Close();
            }
            httpResponse.Close();
        }
    }
    finally
    {
        httpRequest.Abort();
    }
    Thread.CurrentThread.CurrentCulture = Thread.CurrentThread.CurrentUICulture = new CultureInfo(oldCulture);
    return result;
}

如果你想知道：

在ReplicateCookies中，如果您使用null调用CookieCOntainer.Add作为域，则在运行时失败
代码已经包含解决CurrentCulture问题的修复程序。继续，取出所有改变文化的代码，将你的线程文化设置为某种东西（例如“fr-FR”）并给代码一个旋转。

我已经确定：

没有代理干扰请求
没有防火墙设置会阻止此类请求

也许值得一提的是，这是在内部使用MVC3 Web应用程序来生成模板化消息 - 模板本身就是一个网页。应用程序设置它的文化（Global.asax.cs）：

protected void Application_AcquireRequestState()
{
    if (HttpContext.Current == null)
        return;
    if (HttpContext.Current.Session == null)
        return;
    if (HttpContext.Current.Session["Culture"] != null)
        CultureHelper.SetCulture(HttpContext.Current.Session["Culture"].ToString());
}

辅助类：

public static class CultureHelper
{
    public static void SetCulture(string culture)
    {
        if (string.IsNullOrEmpty(culture))
            return;
        var cultureInfo = new CultureInfo(culture);
        if (culture.ToLower().Equals("fr-fr") || culture.ToLower().Equals("fr"))
            cultureInfo.NumberFormat.NumberGroupSeparator = cultureInfo.NumberFormat.CurrencyGroupSeparator = ".";
        Thread.CurrentThread.CurrentCulture = Thread.CurrentThread.CurrentUICulture = cultureInfo;
    }
}

默认情况下，法语出于某种原因使用空格作为千位分隔符 - 因此if语句。

ReplicateCookies方法会将会话cookie和身份验证cookie复制到内部请求，以便在结果内部请求中保留会话/身份验证。

该网站显然有改变当前文化的方法（更改会话价值）。在ReadWebPage方法修复之前，一切都会正常工作，直到文化发生变化。之后，每个HttpWebRequest.GetResponse都会超时，直到将文化更改回 - 在我的情况下 - en-GB。

为什么会发生这种情况？我可能在某处做了一些严重错误的事情。正如我所说，它正处于目前的状态。它不是很漂亮。

Answer 1

由于所有尝试在任何人看到它之前快速删除此帖子失败，这是解决方案。像往常一样，这是你从未想到的一件事 - 会议。当我画“粉碎你的头在这里！”在一张纸上的黑点，这是更正后的代码：

private static void ReplicateCookies(HttpWebRequest request)
{
    if (HttpContext.Current == null)
        return;
    if (request.CookieContainer == null)
        request.CookieContainer = new CookieContainer();
    foreach (var cookieKey in HttpContext.Current.Request.Cookies.Keys)
    {
        if (!cookieKey.ToString().Equals("ASP.NET_SessionId"))
        {
            var cookie = HttpContext.Current.Request.Cookies[cookieKey.ToString()];
            request.CookieContainer.Add(new Cookie(cookie.Name, cookie.Value, cookie.Path, string.IsNullOrEmpty(cookie.Domain)
                ? HttpContext.Current.Request.Url.Host
                : cookie.Domain));
        }

    }
}

private HttpWebRequest CreateRequest(string url, string method = null)
{
    var httpRequest = WebRequest.Create(url) as HttpWebRequest;
    ReplicateCookies(httpRequest);
    httpRequest.KeepAlive = false;
    httpRequest.Method = method ?? "GET";
    httpRequest.Timeout = 20000;
    httpRequest.Proxy = null;
    httpRequest.ServicePoint.ConnectionLeaseTimeout = 20000;
    httpRequest.ServicePoint.MaxIdleTime = 10000;
    httpRequest.Headers.Add("Accept-Language", Thread.CurrentThread.CurrentCulture.Name);
    return httpRequest;
}

public string ReadWebPage(string url)
{
    string result;
    var httpRequest = CreateRequest(url);
    try
    {
        using (var httpResponse = httpRequest.GetResponse())
        {
            using (var stream = httpResponse.GetResponseStream())
            {
                using (var reader = new StreamReader(stream, Encoding.UTF8))
                {
                    result = reader.ReadToEnd();
                    reader.Close();
                }
                stream.Flush();
                stream.Close();
            }
            httpResponse.Close();
        }
    }
    finally
    {
        httpRequest.Abort();
    }
    return result;
}

说明：问题出在ReplicateCookies方法中。其他一切都是重写ASP会话cookie。并且因为它正在调用同一个进程，后来挂起（并最终超时）因为初始请求的会话被锁定 - 并且传入的请求试图使用相同的会话。

现在把这个磁铁的黑色大点挂在墙上......

如果更改Thread.CurrentThread.CurrentCulture，HttpWebRequest将超时

1 个答案: