CookieContainer 错误？

发布于 2024-07-25 02:02:01 字数 2468 浏览 6 评论 0原文

我很困惑 CookieContainer 如何处理域，所以我创建了这个测试。此测试显示 cookieContainer 不会为“example.com”返回任何 cookie，但根据 RFC，它应该返回至少 2 个 cookie。

这不是一个错误吗？

如何让它发挥作用？

以下是有关此错误的讨论：

http://social.msdn.microsoft.com/Forums/en-US/ncl/thread/c4edc965-2dc2-4724-8f08-68815cf1dce6

<%@ Page Language="C#" %>

<%@ Import Namespace="System.Net" %>
<!DOCTYPE html PUBLIC "-//W3C//DTD XHTML 1.0 Transitional//EN" "http://www.w3.org/TR/xhtml1/DTD/xhtml1-transitional.dtd">

<script runat="server">
    CookieContainer getContainer()
    {
        CookieContainer result = new CookieContainer();

        Uri uri = new Uri("http://sub.example.com");
        string cookieH = @"Test1=val; domain=sub.example.com; path=/";
        result.SetCookies(uri, cookieH);

        cookieH = @"Test2=val; domain=.example.com; path=/";
        result.SetCookies(uri, cookieH);

        cookieH = @"Test3=val; domain=example.com; path=/";
        result.SetCookies(uri, cookieH);

        return result;
    }

    void Test()
    {
        CookieContainer cookie = getContainer();
        lblResult.Text += "<br>Total cookies count: " + cookie.Count + " &nbsp;&nbsp; expected: 3";

        Uri uri = new Uri("http://sub.example.com");
        CookieCollection coll = cookie.GetCookies(uri);
        lblResult.Text += "<br>For " + uri + " Cookie count: " + coll.Count + " &nbsp;&nbsp; expected: 2";

        uri = new Uri("http://other.example.com");
        coll = cookie.GetCookies(uri);
        lblResult.Text += "<br>For " + uri + " Cookie count: " + coll.Count + " &nbsp;&nbsp; expected: 2";

        uri = new Uri("http://example.com");
        coll = cookie.GetCookies(uri);
        lblResult.Text += "<br>For " + uri + " Cookie count: " + coll.Count + " &nbsp;&nbsp; expected: 2";

    }

    protected void Page_Load(object sender, EventArgs e)
    {
        Test();
    }
</script>

<html xmlns="http://www.w3.org/1999/xhtml">
<head runat="server">
    <title>CookieContainer Test Page</title>
</head>
<body>
    <form id="frmTest" runat="server">
    <asp:Label ID="lblResult" EnableViewState="false" runat="server"></asp:Label>
    </form>
</body>
</html>

原文

I'm confused how CookieContainer handles domain, so I create this test.
This test shows cookieContainer doesn't return any cookie for "example.com" but according to RFC it should return at least 2 cookies.

Isn't it a bug?

How make it to work?

Here is a discussion about this bug:

http://social.msdn.microsoft.com/Forums/en-US/ncl/thread/c4edc965-2dc2-4724-8f08-68815cf1dce6

<%@ Page Language="C#" %>

<%@ Import Namespace="System.Net" %>
<!DOCTYPE html PUBLIC "-//W3C//DTD XHTML 1.0 Transitional//EN" "http://www.w3.org/TR/xhtml1/DTD/xhtml1-transitional.dtd">

<script runat="server">
    CookieContainer getContainer()
    {
        CookieContainer result = new CookieContainer();

        Uri uri = new Uri("http://sub.example.com");
        string cookieH = @"Test1=val; domain=sub.example.com; path=/";
        result.SetCookies(uri, cookieH);

        cookieH = @"Test2=val; domain=.example.com; path=/";
        result.SetCookies(uri, cookieH);

        cookieH = @"Test3=val; domain=example.com; path=/";
        result.SetCookies(uri, cookieH);

        return result;
    }

    void Test()
    {
        CookieContainer cookie = getContainer();
        lblResult.Text += "<br>Total cookies count: " + cookie.Count + "    expected: 3";

        Uri uri = new Uri("http://sub.example.com");
        CookieCollection coll = cookie.GetCookies(uri);
        lblResult.Text += "<br>For " + uri + " Cookie count: " + coll.Count + "    expected: 2";

        uri = new Uri("http://other.example.com");
        coll = cookie.GetCookies(uri);
        lblResult.Text += "<br>For " + uri + " Cookie count: " + coll.Count + "    expected: 2";

        uri = new Uri("http://example.com");
        coll = cookie.GetCookies(uri);
        lblResult.Text += "<br>For " + uri + " Cookie count: " + coll.Count + "    expected: 2";

    }

    protected void Page_Load(object sender, EventArgs e)
    {
        Test();
    }
</script>

<html xmlns="http://www.w3.org/1999/xhtml">
<head runat="server">
    <title>CookieContainer Test Page</title>
</head>
<body>
    <form id="frmTest" runat="server">
    <asp:Label ID="lblResult" EnableViewState="false" runat="server"></asp:Label>
    </form>
</body>
</html>

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辞慾 2024-08-01 02:02:01

我刚刚找到了这个错误的修复并在这里讨论：
http://dot-net-expertise .blogspot.com/2009/10/cookiecontainer-domain-handling-bug-fix.html

这是解决方案：

不要使用.Add(Cookie)，仅使用.Add(Uri, Cookie)方法。

每次向容器添加 cookie 时调用 BugFix_CookieDomain 或
在您使用 .GetCookie 之前或在系统使用容器之前。

private void BugFix_CookieDomain(CookieContainer cookieContainer) 
  { 
      System.Type _ContainerType = typeof(CookieContainer); 
      哈希表 = (Hashtable)_ContainerType.InvokeMember("m_domainTable", 
                                 System.Reflection.BindingFlags.NonPublic | System.Reflection.BindingFlags.NonPublic | 
                                 System.Reflection.BindingFlags.GetField | System.Reflection.BindingFlags.GetField | 
                                 System.Reflection.BindingFlags.Instance， 
                                 无效的， 
                                 cookie容器， 
                                 新对象[] { }); 
      ArrayList 键 = new ArrayList(table.Keys); 
      foreach（键中的字符串 keyObj） 
      { 
          字符串 key = (keyObj 作为字符串); 
          if (键[0] == '.') 
          { 
              字符串 newKey = key.Remove(0, 1); 
              表[newKey] = 表[keyObj]; 
          } 
      } 
  }

I just found the fix for this bug and discussed here:
http://dot-net-expertise.blogspot.com/2009/10/cookiecontainer-domain-handling-bug-fix.html

Here is the solution:

Don't use .Add(Cookie), Use only .Add(Uri, Cookie) method.

Call BugFix_CookieDomain each time you add a cookie to the container or
before you use .GetCookie or before system use the container.

private void BugFix_CookieDomain(CookieContainer cookieContainer)
{
    System.Type _ContainerType = typeof(CookieContainer);
    Hashtable table = (Hashtable)_ContainerType.InvokeMember("m_domainTable",
                               System.Reflection.BindingFlags.NonPublic |
                               System.Reflection.BindingFlags.GetField |
                               System.Reflection.BindingFlags.Instance,
                               null,
                               cookieContainer,
                               new object[] { });
    ArrayList keys = new ArrayList(table.Keys);
    foreach (string keyObj in keys)
    {
        string key = (keyObj as string);
        if (key[0] == '.')
        {
            string newKey = key.Remove(0, 1);
            table[newKey] = table[keyObj];
        }
    }
}

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峩卟喜欢 2024-08-01 02:02:01

我已针对此问题创建了适用于 Windows 10 / UWP / .NET Core 应用程序的修复程序。问题在于 CookieContainer 的内部结构不同，但与 .NET Framework 中的内部结构一样糟糕。所以所接受的解决方案不再有效。

但我没有“修复” CookieContainer ，而是编写了一个 GetCookies() 版本，它使用字符串获取特定域的所有 cookie，而不管它们的“安全性”如何。 " 状态或者它们是否以点为前缀。请随意修改它，以满足您的需求，我将考虑在未来的 .NET Core 版本中实现它的版本。

using System.Collections.Generic;
using System.Reflection;

namespace System.Net
{

    /// <summary>
    /// Contains extensions for the <see cref="CookieContaner"/> class.
    /// </summary>
    public static class CookieContainerExtensions
    {

        /// <summary>
        /// Uses Reflection to get ALL of the <see cref="Cookie">Cookies</see> where <see cref="Cookie.Domain"/> 
        /// contains part of the specified string. Will return cookies for any subdomain, as well as dotted-prefix cookies. 
        /// </summary>
        /// <param name="cookieContainer">The <see cref="CookieContainer"/> to extract the <see cref="Cookie">Cookies</see> from.</param>
        /// <param name="domain">The string that contains part of the domain you want to extract cookies for.</param>
        /// <returns></returns>
        public static IEnumerable<Cookie> GetCookies(this CookieContainer cookieContainer, string domain)
        {
            var domainTable = GetFieldValue<dynamic>(cookieContainer, "_domainTable");
            foreach (var entry in domainTable)
            {
                string key = GetPropertyValue<string>(entry, "Key");

                if (key.Contains(domain))
                {
                    var value = GetPropertyValue<dynamic>(entry, "Value");

                    var internalList = GetFieldValue<SortedList<string, CookieCollection>>(value, "_list");
                    foreach (var li in internalList)
                    {
                        foreach (Cookie cookie in li.Value)
                        {
                            yield return cookie;
                        }
                    }
                }
            }
        }

        /// <summary>
        /// Gets the value of a Field for a given object instance.
        /// </summary>
        /// <typeparam name="T">The <see cref="Type"/> you want the value to be converted to when returned.</typeparam>
        /// <param name="instance">The Type instance to extract the Field's data from.</param>
        /// <param name="fieldName">The name of the Field to extract the data from.</param>
        /// <returns></returns>
        internal static T GetFieldValue<T>(object instance, string fieldName)
        {
            BindingFlags bindFlags = BindingFlags.Instance | BindingFlags.Public | BindingFlags.NonPublic | BindingFlags.Static;
            FieldInfo fi = instance.GetType().GetField(fieldName, bindFlags);
            return (T)fi.GetValue(instance);
        }

        /// <summary>
        /// Gets the value of a Property for a given object instance.
        /// </summary>
        /// <typeparam name="T">The <see cref="Type"/> you want the value to be converted to when returned.</typeparam>
        /// <param name="instance">The Type instance to extract the Property's data from.</param>
        /// <param name="propertyName">The name of the Property to extract the data from.</param>
        /// <returns></returns>
        internal static T GetPropertyValue<T>(object instance, string propertyName)
        {
            var pi = instance.GetType().GetProperty(propertyName);
            return (T)pi.GetValue(instance, null);
        }

    }

}

I've created a fix for this problem that works on Windows 10 / UWP / .NET Core apps. The issue is that the internals for CookieContainer are different, but just as crappy, as they are in the .NET Framework proper. So the accepted solution does not work anymore.

But instead of "fixing" the CookieContainer, I just wrote a version of GetCookies() that gets all the cookies for a particular domain with a string, regardless of their "secure" state or if they are prefixed with a dot. Feel free to modify it as you see fit for your needs, and I'll see about getting a version of it implemented in a future .NET Core release.

using System.Collections.Generic;
using System.Reflection;

namespace System.Net
{

    /// <summary>
    /// Contains extensions for the <see cref="CookieContaner"/> class.
    /// </summary>
    public static class CookieContainerExtensions
    {

        /// <summary>
        /// Uses Reflection to get ALL of the <see cref="Cookie">Cookies</see> where <see cref="Cookie.Domain"/> 
        /// contains part of the specified string. Will return cookies for any subdomain, as well as dotted-prefix cookies. 
        /// </summary>
        /// <param name="cookieContainer">The <see cref="CookieContainer"/> to extract the <see cref="Cookie">Cookies</see> from.</param>
        /// <param name="domain">The string that contains part of the domain you want to extract cookies for.</param>
        /// <returns></returns>
        public static IEnumerable<Cookie> GetCookies(this CookieContainer cookieContainer, string domain)
        {
            var domainTable = GetFieldValue<dynamic>(cookieContainer, "_domainTable");
            foreach (var entry in domainTable)
            {
                string key = GetPropertyValue<string>(entry, "Key");

                if (key.Contains(domain))
                {
                    var value = GetPropertyValue<dynamic>(entry, "Value");

                    var internalList = GetFieldValue<SortedList<string, CookieCollection>>(value, "_list");
                    foreach (var li in internalList)
                    {
                        foreach (Cookie cookie in li.Value)
                        {
                            yield return cookie;
                        }
                    }
                }
            }
        }

        /// <summary>
        /// Gets the value of a Field for a given object instance.
        /// </summary>
        /// <typeparam name="T">The <see cref="Type"/> you want the value to be converted to when returned.</typeparam>
        /// <param name="instance">The Type instance to extract the Field's data from.</param>
        /// <param name="fieldName">The name of the Field to extract the data from.</param>
        /// <returns></returns>
        internal static T GetFieldValue<T>(object instance, string fieldName)
        {
            BindingFlags bindFlags = BindingFlags.Instance | BindingFlags.Public | BindingFlags.NonPublic | BindingFlags.Static;
            FieldInfo fi = instance.GetType().GetField(fieldName, bindFlags);
            return (T)fi.GetValue(instance);
        }

        /// <summary>
        /// Gets the value of a Property for a given object instance.
        /// </summary>
        /// <typeparam name="T">The <see cref="Type"/> you want the value to be converted to when returned.</typeparam>
        /// <param name="instance">The Type instance to extract the Property's data from.</param>
        /// <param name="propertyName">The name of the Property to extract the data from.</param>
        /// <returns></returns>
        internal static T GetPropertyValue<T>(object instance, string propertyName)
        {
            var pi = instance.GetType().GetProperty(propertyName);
            return (T)pi.GetValue(instance, null);
        }

    }

}

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等风也等你 2024-08-01 02:02:01

//bug fix, exists only in 3.5 FW, please wrap it with defines
//http://dot-net-expertise.blogspot.com/2009/10/cookiecontainer-domain-handling-bug-fix.html
if(!value.Contains("://www.")) //we are going to hit the bug
{
    string urlWWW = value.Replace("://", "://www.");
    Uri uriWWW = new Uri(urlWWW);
    foreach (Cookie c in _cookieContainer.GetCookies(uriWWW))
        if (c.Domain.StartsWith("."))
            request.Headers["Cookies"] += c.Name + "=" + c.Value + ";"; //manually add the cookies
}
//~bug fix

//bug fix, exists only in 3.5 FW, please wrap it with defines
//http://dot-net-expertise.blogspot.com/2009/10/cookiecontainer-domain-handling-bug-fix.html
if(!value.Contains("://www.")) //we are going to hit the bug
{
    string urlWWW = value.Replace("://", "://www.");
    Uri uriWWW = new Uri(urlWWW);
    foreach (Cookie c in _cookieContainer.GetCookies(uriWWW))
        if (c.Domain.StartsWith("."))
            request.Headers["Cookies"] += c.Name + "=" + c.Value + ";"; //manually add the cookies
}
//~bug fix

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小瓶盖 2024-08-01 02:02:01

我因这个问题而失去了一天。 CallMeLaNN 的回复对我没有帮助（我正在使用 .Net 4.5）。就我而言，问题在于设置请求正文和设置 cookie 的顺序。

在这种情况下，cookie 将不会发送到服务器：

            var response = (HttpWebRequest)WebRequest.Create("http://localhost:4433/");

            using (var requestStream = response.GetRequestStream())
            {
               using (var streamWriter = new StreamWriter(requestStream))
               {
                    requestStream.Write(RequestContent);
               }
            }

            response.CookieContainer.Add(new Cookie("Name", "Value"));
            await response.GetResponseAsync();

要使其正常工作，需要更改顺序：

            var response = (HttpWebRequest)WebRequest.Create("http://localhost:4433/");

            response.CookieContainer.Add(new Cookie("Name", "Value"));
            await response.GetResponseAsync();

            using (var requestStream = response.GetRequestStream())
            {
               using (var streamWriter = new StreamWriter(requestStream))
               {
                    requestStream.Write(RequestContent);
               }
            }

Lost my day with this issue. CallMeLaNN's response didn't help me (I'm using .Net 4.5). In my case the problem was in order of setting body of request and settings cookies.

In this case cookies will not be sent to server:

            var response = (HttpWebRequest)WebRequest.Create("http://localhost:4433/");

            using (var requestStream = response.GetRequestStream())
            {
               using (var streamWriter = new StreamWriter(requestStream))
               {
                    requestStream.Write(RequestContent);
               }
            }

            response.CookieContainer.Add(new Cookie("Name", "Value"));
            await response.GetResponseAsync();

To make it work change the order is required:

            var response = (HttpWebRequest)WebRequest.Create("http://localhost:4433/");

            response.CookieContainer.Add(new Cookie("Name", "Value"));
            await response.GetResponseAsync();

            using (var requestStream = response.GetRequestStream())
            {
               using (var streamWriter = new StreamWriter(requestStream))
               {
                    requestStream.Write(RequestContent);
               }
            }

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