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update1：​​经过更多研究，我不确定这是否可行，我在修复它时创建了一个 UserVoice 条目。

我正在尝试在应用程序退出或发生墓碑时保存 CookieContainer，但我遇到了一些问题。

我试图将 CookieContainer 保存在 AppSettings 中，但加载后，cookies 消失了。

Researching this internally, DataContractSerializer cannot serialize cookies.
This seems to be a behavior that Windows Phone inherited from Silverlight's DataContractSerializer.

在做了更多研究之后，似乎解决办法是从容器中取出饼干并以另一种方式保存它们。这工作得很好，直到我遇到另一个障碍。我无法使用 .mydomain.com 的 Uri 获取 Cookie。我相信这是因为这个错误。我可以在域表中看到 cookie .mydomain.com 但 GetCookies 不适用于该特定 cookie。

该错误再次发布在这里。

当域以 . 开头时，从容器中获取 cookie 也存在问题：

CookieContainer container = new CookieContainer();
container.Add(new Cookie("x", "1", "/", ".blah.com"));
CookieCollection cv = container.GetCookies(new Uri("http://blah.com"));
cv = container.GetCookies(new Uri("http://w.blah.com"));

我找到了一种解决方法，使用反射来迭代域表并删除“。” 字首。

private void BugFix_CookieDomain(CookieContainer cookieContainer)
{
    System.Type _ContainerType = typeof(CookieContainer);
    var = _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];
        }
    }
}

只有在调用 InvokeMember 时，才会在 SL 中引发 MethodAccessException。这并不能真正解决我的问题，因为我需要保留的 cookie 之一是 HttpOnly，这是 CookieContainer 的原因之一。

如果服务器发送 HTTPOnly cookie，您应该在请求上创建一个 System.Net.CookieContainer 来保存 cookie，尽管您将看不到或无法访问存储在容器中的 cookie。

那么，有什么想法吗？我错过了一些简单的东西吗？是否有另一种方法来保存 CookieContainer 的状态，或者我是否需要保存用户信息，包括密码，并在每次应用程序启动和从墓碑恢复时重新验证他们的身份？

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2 回答 2

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我写了一个专门解决这个问题的 CookieSerializer。序列化器粘贴在下面。对于工作项目和场景，请访问项目的CodePlex 站点。

public static class CookieSerializer
{
    /// <summary>
    /// Serializes the cookie collection to the stream.
    /// </summary>
    /// <param name="cookies">You can obtain the collection through your <see cref="CookieAwareWebClient">WebClient</see>'s <code>CookieContainer.GetCookies(Uri)</code>-method.</param>
    /// <param name="address">The <see cref="Uri">Uri</see> that produced the cookies</param>
    /// <param name="stream">The stream to which to serialize</param>
    public static void Serialize(CookieCollection cookies, Uri address, Stream stream)
    {
        using (var writer = new StreamWriter(stream))
        {
            for (var enumerator = cookies.GetEnumerator(); enumerator.MoveNext();)
            {
                var cookie = enumerator.Current as Cookie;
                if (cookie == null) continue;
                writer.WriteLine(address.AbsoluteUri);
                writer.WriteLine(cookie.Comment);
                writer.WriteLine(cookie.CommentUri == null ? null : cookie.CommentUri.AbsoluteUri);
                writer.WriteLine(cookie.Discard);
                writer.WriteLine(cookie.Domain);
                writer.WriteLine(cookie.Expired);
                writer.WriteLine(cookie.Expires);
                writer.WriteLine(cookie.HttpOnly);
                writer.WriteLine(cookie.Name);
                writer.WriteLine(cookie.Path);
                writer.WriteLine(cookie.Port);
                writer.WriteLine(cookie.Secure);
                writer.WriteLine(cookie.Value);
                writer.WriteLine(cookie.Version);
            }
        }
    }

    /// <summary>
    /// Deserializes <see cref="Cookie">Cookie</see>s from the <see cref="Stream">Stream</see>, 
    /// filling the <see cref="CookieContainer">CookieContainer</see>.
    /// </summary>
    /// <param name="stream">Stream to read</param>
    /// <param name="container">Container to fill</param>
    public static void Deserialize(Stream stream, CookieContainer container)
    {
        using (var reader = new StreamReader(stream))
        {
            while (!reader.EndOfStream)
            {
                var uri = Read(reader, absoluteUri => new Uri(absoluteUri, UriKind.Absolute));
                var cookie = new Cookie();
                cookie.Comment = Read(reader, comment => comment);
                cookie.CommentUri = Read(reader, absoluteUri => new Uri(absoluteUri, UriKind.Absolute));
                cookie.Discard = Read(reader, bool.Parse);
                cookie.Domain = Read(reader, domain => domain);
                cookie.Expired = Read(reader, bool.Parse);
                cookie.Expires = Read(reader, DateTime.Parse);
                cookie.HttpOnly = Read(reader, bool.Parse);
                cookie.Name = Read(reader, name => name);
                cookie.Path = Read(reader, path => path);
                cookie.Port = Read(reader, port => port);
                cookie.Secure = Read(reader, bool.Parse);
                cookie.Value = Read(reader, value => value);
                cookie.Version = Read(reader, int.Parse);
                container.Add(uri, cookie);
            }
        }
    }

    /// <summary>
    /// Reads a value (line) from the serialized file, translating the string value into a specific type
    /// </summary>
    /// <typeparam name="T">Target type</typeparam>
    /// <param name="reader">Input stream</param>
    /// <param name="translator">Translation function - translate the read value into 
    /// <typeparamref name="T"/> if the read value is not <code>null</code>.
    /// <remarks>If the target type is <see cref="Uri">Uri</see> , the value is considered <code>null</code> if it's an empty string.</remarks> </param>
    /// <param name="defaultValue">The default value to return if the read value is <code>null</code>.
    /// <remarks>The translation function will not be called for null values.</remarks></param>
    /// <returns></returns>
    private static T Read<T>(TextReader reader, Func<string, T> translator, T defaultValue = default(T))
    {
        var value = reader.ReadLine();
        if (value == null)
            return defaultValue;
        if (typeof(T) == typeof(Uri) && String.IsNullOrEmpty(value))
            return defaultValue;
        return translator(value);
    }
}
于 2011-12-09T17:30:34.807 回答
0

您无法在 WP7 中访问您的程序集之外的私有成员，即使使用反射也是如此。这是一种确保您无法调用内部系统 API 的安全措施。

看起来你可能不走运。

于 2011-09-27T08:32:08.713 回答