Windows Phone 7 Mango保存CookieContainer的状态

Question

更新1：经过更多研究后，我不确定是否可行， 我在修复它时创建了一个UserVoice条目 。

我正在尝试在应用程序出口或发生Tombstoning时保存CookieContainer，但遇到了一些问题。

我试图将CookieContainer保存在AppSettings中，但是加载后，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.

经过更多研究后，似乎可以解决的方法是从容器中取出cookie并以其他方式保存它们。 直到我遇到另一个障碍之前，这种方法都很好。 我无法使用Uri为.mydomain.com的GetCookies。 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，从容器中取出cookie也是一个问题。

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];
        }
    }
}

仅当调用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，尽管您将看不到或无法访问存储在容器中的cookie，但应在请求中创建一个System.Net.CookieContainer来保存cookie。

那么，有什么想法吗？ 我是否缺少简单的东西？ 还有另一种方法来保存CookieContainer的状态，还是我需要保存用户信息（包括密码），并在每次应用启动时和从逻辑删除中回来时对它们进行重新身份验证？

Answer 1

我写了一个CookieSerializer专门解决了这个问题。 序列化器粘贴在下面。 对于有效的项目和方案，请访问该项目的CodePlex网站 。

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);
    }
}

Answer 2

即使使用反射，您也不能在WP7中访问程序集之外的私人成员。 这是一项安全措施，可确保您无法调用内部系统API。

看来您可能不走运。