asp.net5中用户认证与授权(2)

上篇文章给大家介绍了)，基础建立好了，紧接着就要创建对基础类进行操作的类，也就是实现基础类的增删改查当然，为了使用asp.net5的认证机制，这些都是通过特定的接口来实现的。

比如，对于角色来说，角色管理要实现的接口如下：

   public interface iqueryablerolestore<trole> : irolestore<trole>, idisposable where trole : class
   {
     iqueryable<trole> roles { get; }
   }
   public interface irolestore<trole> : idisposable where trole : class
   {
     task<identityresult> createasync(trole role, cancellationtoken cancellationtoken);
     task<identityresult> deleteasync(trole role, cancellationtoken cancellationtoken);
     task<trole> findbyidasync(string roleid, cancellationtoken cancellationtoken);
     task<trole> findbynameasync(string normalizedrolename, cancellationtoken cancellationtoken);
     task<string> getnormalizedrolenameasync(trole role, cancellationtoken cancellationtoken);
     task<string> getroleidasync(trole role, cancellationtoken cancellationtoken);
     task<string> getrolenameasync(trole role, cancellationtoken cancellationtoken);
     task setnormalizedrolenameasync(trole role, string normalizedname, cancellationtoken cancellationtoken);
     task setrolenameasync(trole role, string rolename, cancellationtoken cancellationtoken);
    task<identityresult> updateasync(trole role, cancellationtoken cancellationtoken);
   }

其实，也没什么复杂，一个是获得所有预定义角色的列表，另一个是关于角色的增删改查而已,代码如下：

 public class hdrolestore<trole> : iqueryablerolestore<trole>
      where trole : hdrole, new()
    {
      /// <summary>
      /// 存储所有预定义的角色
      /// </summary>
      private readonly dictionary<string, trole> _roles = new dictionary<string, trole>();
      /// <summary>
     /// 所有角色
     /// </summary>
     public iqueryable<trole> roles
     {
       get
       {
         if (_roles.count == )
         {
           trole role = new trole();
           role.id = "admin";
           role.name = "管理员";
           _roles.add(role.id, role);
           role = new trole();
           role.id = "user";
           role.name = "用户";
           _roles.add(role.id, role);
           role = new trole();
           role.id = "power";
           role.name = "大虾";
           _roles.add(role.id, role);
         }
         return _roles.values.asqueryable();
       }
     }
     public task<identityresult> createasync(trole role, cancellationtoken cancellationtoken)
     {
       _roles[role.id] = role;
       return task.fromresult(identityresult.success);
     }
     public task<identityresult> deleteasync(trole role, cancellationtoken cancellationtoken)
     {
       if (role == null || !_roles.containskey(role.id))
       {
         throw new invalidoperationexception("unknown role");
       }
       _roles.remove(role.id);
       return task.fromresult(identityresult.success);
     }
     public void dispose()
     {
     }
     public task<trole> findbyidasync(string roleid, cancellationtoken cancellationtoken)
     {
       if (_roles.containskey(roleid))
       {
         return task.fromresult(_roles[roleid]);
       }
       return task.fromresult<trole>(null);
     }
     public task<trole> findbynameasync(string normalizedrolename, cancellationtoken cancellationtoken)
     {
       return
          task.fromresult(
            roles.singleordefault(r => string.equals(r.name, normalizedrolename, stringcomparison.ordinalignorecase)));
     }
     public task<string> getnormalizedrolenameasync(trole role, cancellationtoken cancellationtoken)
     {
       return task.fromresult(role.name);
     }
     public task<string> getroleidasync(trole role, cancellationtoken cancellationtoken)
     {
       return task.fromresult(role.id);
     }
     public task<string> getrolenameasync(trole role, cancellationtoken cancellationtoken)
     {
       return task.fromresult(role.name);
     }
     public task setnormalizedrolenameasync(trole role, string normalizedname, cancellationtoken cancellationtoken)
     {
       role.name = normalizedname;
       return task.fromresult();
     }
     public task setrolenameasync(trole role, string rolename, cancellationtoken cancellationtoken)
     {
       role.name = rolename;
       return task.fromresult();
     }
     public task<identityresult> updateasync(trole role, cancellationtoken cancellationtoken)
     {
       _roles[role.id] = role;
       return task.fromresult(identityresult.success);
     }
   }

可以看到，在第12行，我们的方法里直接写死了角色列表，如果相结合具体的项目的话，我相信叶良辰有一百种方法从各种数据库、配置文件等取得角色列表，而其他程序代码却基本不用更改。

当然，asp.net5自带的默认实现实现了很多其他接口，这里为了最简单起见，只实现了最基本的。

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