是否可以使用 Amazon.com 作为身份验证提供商

Question

我正在构建一个使用 Amazon.com 产品广告 API 的 Silverlight 应用程序。我想向我的应用程序添加身份验证，但我想实现 OpenId，而不是使用默认表单基本身份验证。

我看到许多网站使用雅虎或谷歌作为其提供商。我确实记得至少有一个网站 target.com 允许您使用 Amazon.com 登录。

有人可以指出我执行此身份验证的正确文档吗？

Answer 1

我对 OpenID 不太了解，但你几乎必须编写一个自定义的身份验证服务，这还不错。 （顺便说一句，它仍然会利用实际上很方便的表单身份验证）

如果您知道如何通过代码进行验证......

在服务器端您需要三部分。一个保存用户数据的类，一个继承自 forms auth 的类.. 以及一个处理登录异常的类..

的服务器代码示例（抱歉，减去了 open id 检查）

using System.ServiceModel.DomainServices.Server.ApplicationServices;

public class UserDTO : UserBase
{
    public string Email { get; set; }

    //Must be string since will be included in HTTP Headers
    public string Id { get; set; }

    public bool CanCreateSomething { get; set;}
}

这是使用 System; ；
使用 System.Data.Objects；
使用 System.ServiceModel.DomainServices.Hosting；

[EnableClientAccess]
public class CustomAuthenticationService : FormsAuthenticationService<UserDTO>
{


    protected override UserDTO ValidateCredentials(string name, string password, string customData,
                                                   out string userData)
    {
        UserDTO user = null;
        userData = null;

        OpenIDUser OIDusr;

        if OIDusr != null)
        {
            user = new UserDTO { Name = OIDusr.Description, Email = OIDusr.PrimaryEmail, Id= OIDusr.Id.ToString() };
        }

        if (user != null)
        {
            //Set custom data fields for HTTP session  
            userData = user.PartyId + ":" + user.Email;
        }


        return user;
    }

在

[Serializable]
public class FormsAuthenticationLogonException : Exception
{
    public FormsAuthenticationLogonException(string message) : base(message){}
}

public abstract class FormsAuthenticationService<TUser> : DomainService, IAuthentication<TUser>
    where TUser : UserBase
{
    #region IAuthentication<TUser> Members

    public TUser GetUser()
    {
        var currentUser = ServiceContext.User;
        if ((currentUser != null) && currentUser.Identity.IsAuthenticated)
        {
            var userIdentity = currentUser.Identity as FormsIdentity;
            if (userIdentity != null)
            {
                var ticket = userIdentity.Ticket;
                if (ticket != null)
                {
                    return GetCurrentUser(currentUser.Identity.Name, ticket.UserData);
                }
            }
        }
        return GetDefaultUser();
    }


    public TUser Login(string userName, string password, bool isPersistent, string customData)
    {
        string userData;
        TUser user = ValidateCredentials(userName, password, customData, out userData);
        if (user != null)
        {
            FormsAuthenticationTicket ticket = new FormsAuthenticationTicket( /* version */
                1, userName, DateTime.Now, DateTime.Now.AddMinutes(30),
                isPersistent, userData, FormsAuthentication.FormsCookiePath);
            string encryptedTicket = FormsAuthentication.Encrypt(ticket);
            HttpCookie authCookie = new HttpCookie(FormsAuthentication.FormsCookieName, encryptedTicket);
            HttpContextBase httpContext = (HttpContextBase) ServiceContext.GetService(typeof (HttpContextBase));
            httpContext.Response.Cookies.Add(authCookie);
        }
        else
        {
            HttpContextBase httpContext = (HttpContextBase) ServiceContext.GetService(typeof (HttpContextBase));
            httpContext.AddError(new FormsAuthenticationLogonException("Username or password is not correct."));
        }
        return user;
    }

    public TUser Logout()
    {
        FormsAuthentication.SignOut();
        return GetDefaultUser();
    }

    public void UpdateUser(TUser user)
    {
        throw new NotImplementedException();
    }

    #endregion

    protected abstract TUser GetCurrentUser(string name, string userData);

    protected virtual TUser GetDefaultUser()
    {
        return null;
    }

    protected abstract TUser ValidateCredentials(string name, string password, string customData,
                                                 out string userData);
}

客户端......

    LoginParameters loginParameters = new LoginParameters(UserName, Password);

        WebContextBase.Current.Authentication.Login(loginParameters, 
            delegate(LoginOperation operation)      
            {                     
                if (operation.HasError)    
                {
                    App.IsBusy = false;
                    operation.MarkErrorAsHandled();
                    UserName = string.Empty;
                    Password = string.Empty;
                    MessageBox.Show("Username or Password is incorrect!");
                    return;                 
                }

                //Login Success
                CustomAuthenticationContext authContext = new CustomAuthenticationContext();
                authContext.Load(authContext.GetUserQuery(), UserLoaded, false);
            }, null);