CookieContainer错误？
我对CookieContainer如何处理域感到困惑，所以我创建了这个测试。这个测试显示cookieContainer不会为"example.com“返回任何cookie，但根据RFC的说法，它应该至少返回2个cookie。
这不是个bug吗？
如何让它工作？
下面是关于这个bug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 + " 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>回答 6
Stack Overflow用户
发布于 2009-10-08 12:24:51
我刚刚找到了这个bug的修复方法，并在这里讨论：http://dot-net-expertise.blogspot.com/2009/10/cookiecontainer-domain-handling-bug-fix.html
以下是解决方案：
- 不要使用.Add( Cookie)，只使用.Add(Uri，cookie )方法。每次将cookie添加到容器时，或者在使用.GetCookie之前或系统使用容器之前，
- 都会调用BugFix_CookieDomain。
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.GetField | System.Reflection.BindingFlags.Instance，null，cookieContainer，new object[] { })；新密钥= ArrayList ArrayList(table.Keys)；foreach (string keyObj in key ){ string key= (keyObj as string)；if (key ==‘.){ string newKey = key.Remove(0，1)；tablenewKey = tablekeyObj；}
Stack Overflow用户
发布于 2016-09-17 01:05:03
我已经为这个问题创建了一个修复程序，可以在Windows10/ UWP / .NET核心应用程序上运行。问题是CookieContainer的内部结构是不同的，但就像在.NET框架中一样糟糕。因此，被接受的解决方案不再有效。
但是，我并没有“修复”CookieContainer，而是编写了一个版本的GetCookies()，它通过一个字符串获取特定域的所有cookie，而不管它们的“安全”状态如何，也不管它们是否以点为前缀。您可以根据自己的需要对其进行修改，我会在将来的.NET核心发行版中实现它的版本。
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);
}
}
}Stack Overflow用户
发布于 2009-07-31 19:23:39
https://stackoverflow.com/questions/1047669
复制相似问题
腾讯云开发者
Copyright © 2013 - 2026 Tencent Cloud. All Rights Reserved. 腾讯云 版权所有
深圳市腾讯计算机系统有限公司 ICP备案/许可证号：粤B2-20090059 
粤公网安备44030502008569号
腾讯云计算（北京）有限责任公司 京ICP证150476号 | 京ICP备11018762号