如何在C#中进行业务逻辑级访问控制?我昨晚开始修改一个简单的系统,它存在于LINQ对象中,但我意识到我从未见过一个特别干净的访问控制系统。我想知道大师是怎么做的,看看你是否发现了我深夜玩具上的任何漏洞。
我觉得我正在跳过一些不必要的箍,以便构建一个灵活的只读访问控制对象,它似乎应该有一些我不知道的框架预构建的小部件。
#region Simple Demo
public class SomeObject
{
public AccessControl AccessControl;
public SomeObject()
{
ConfigureAccessControl();
}
private void ConfigureAccessControl()
{
AccessControlBuilder acb = new AccessControlBuilder();
acb.AddRole(UserTypes.Admin, true, true);
acb.AddRole(UserTypes.Anonymous, true, true);
acb.AddRole(UserTypes.Owner, true, true);
acb.AddRole(UserTypes.User, true, true);
AccessControl = acb.GetAccessControl();
}
}
public class ObjectFactory
{
private int _requestingUserId;
public ObjectFactory(int RequestingUserId)
{
_requestingUserId = RequestingUserId;
}
public SomeObject GetSomeObject()
{
SomeObject sso = new SomeObject();
if (sso.AccessControl.UserAllowed(_requestingUserId, UserActions.Read))
return new SomeObject();
else
throw new Exception("Unauthorized Access");
}
}
#endregion
#region AccessControl Code
public class AccessControl
{
private Hashtable _data = new Hashtable();
public AccessControl(Hashtable data)
{
_data = data;
}
public bool UserAllowed(int UserId, UserActions Action)
{ //Assorted app-specific logic here to determine role.
//Determine if User is Admin
//Determine if User is Owner
//Determine if User is Logged In
//Determine if User is Anonymous
//Check read/write for determined role
return true;
}
protected AccessControlSettings Role(UserTypes ut)
{
return (AccessControlSettings)_data[ut];
}
}
public class AccessControlBuilder
{
private Hashtable _data = new Hashtable();
public void AddRole(UserTypes ut, bool read, bool write)
{
_data.Add(ut, new AccessControlSettings(read, write));
}
public AccessControl GetAccessControl()
{
return new AccessControl(_data);
}
}
public enum UserActions
{
Read,
Write
}
public enum UserTypes
{
Admin,
Owner,
User,
Anonymous
}
public class AccessControlSettings
{ //Wraps specific access options so we make them set once in the builder
public bool Read { get { return _read; } }
public bool Write { get { return _write; } }
private bool _read;
private bool _write;
public AccessControlSettings(bool read, bool write)
{
_read = read;
_write = write;
}
}
#endregion