asp.net core项目mvc权限控制：分配权限

[AttributeUsage(AttributeTargets.Class | AttributeTargets.Method, AllowMultiple = true, Inherited =true)]　　//类名称可以改，因为我把系统操作当作资源来管理
  public class ResourceAttribute:AuthorizeAttribute
  {
    private string _resouceName;
    private string _action;
    public ResourceAttribute(string name)
    {
      if (string.IsNullOrEmpty(name))
      {
        throw new ArgumentNullException(nameof(name));
      }
      _resouceName = name;
　　　　　　　//把资源名称设置成Policy名称
      Policy = _resouceName;
    }
 
    public string GetResource()
    {
      return _resouceName;
    }
    public string Action
    {
      get
      {
        return _action;
      }
      set
      {
        _action = value;
        if (!string.IsNullOrEmpty(value))
        {　　　　　　　　　　　　//把资源名称跟操作名称组装成Policy
          Policy = _resouceName + "-" + value;
        }
      }
    }
  }

public class ResourceAuthorizationPolicyProvider : IAuthorizationPolicyProvider
  {
    private AuthorizationOptions _options;
    public ResourceAuthorizationPolicyProvider(IOptions<authorizationoptions> options)
    {
      if (options == null)
      {
        throw new ArgumentNullException(nameof(options));
      }
 
      _options = options.Value;
    }
    public Task<authorizationpolicy> GetDefaultPolicyAsync()
    {
      return Task.FromResult(_options.DefaultPolicy);
    }
　　
    public Task<authorizationpolicy> GetPolicyAsync(string policyName)
    {
      AuthorizationPolicy policy = _options.GetPolicy(policyName);　　　　　　　//因为我们policy的名称其实就是对应的权限名称，所以可以用下列逻辑返回需要的验证规则
      if (policy == null)
      {
        string[] resourceValues = policyName.Split(new char[] { '-' }, StringSplitOptions.None);
        if (resourceValues.Length == 1)
        {
          _options.AddPolicy(policyName, builder =>
          {
            builder.AddRequirements(new ClaimsAuthorizationRequirement(resourceValues[0], null));
          });
        }
        else
        {
          _options.AddPolicy(policyName, builder =>
          {
            builder.AddRequirements(new ClaimsAuthorizationRequirement(resourceValues[0], new string[] { resourceValues[1] }));
          });
        }
      }
      return Task.FromResult(_options.GetPolicy(policyName));
    }
  }
</authorizationpolicy></authorizationpolicy></authorizationoptions>

public class ResourceApplicationModelProvider : IApplicationModelProvider
  {
    private readonly IAuthorizationPolicyProvider _policyProvider;
 
    public ResourceApplicationModelProvider(IAuthorizationPolicyProvider policyProvider)
    {
      _policyProvider = policyProvider;
    }
     
 
    public void OnProvidersExecuted(ApplicationModelProviderContext context)
    {
      
    }
 
    public void OnProvidersExecuting(ApplicationModelProviderContext context)
    {
      if (context == null)
      {
        throw new ArgumentNullException(nameof(context));
      }
 
      List<resourceattribute> attributeData = new List<resourceattribute>();　　　　　　　　//循环获取所有的控制器
      foreach (var controllerModel in context.Result.Controllers)
      {　　　　　　　　//得到ResourceAttribute
        var resourceData = controllerModel.Attributes.OfType<resourceattribute>().ToArray();
        if (resourceData.Length > 0)
        {
          attributeData.AddRange(resourceData);
        }
　　　　　　　　　　//循环控制器方法
        foreach (var actionModel in controllerModel.Actions)
        {          //得到方法的ResourceAttribute
          var actionResourceData = actionModel.Attributes.OfType<resourceattribute>().ToArray();
          if (actionResourceData.Length > 0)
          {
            attributeData.AddRange(actionResourceData);
          }
        }
      }
　　　　　　　//把所有的resourceattribute的信息写到一个全局的resourcedata中，resourcedata就可以在其他地方进行使用，resourcedata定义后面补充　
      foreach (var item in attributeData)
      {
        ResourceData.AddResource(item.GetResource(), item.Action);
      }
    }
 
    public int Order { get { return -1000 + 11; } }
  }
</resourceattribute></resourceattribute></resourceattribute></resourceattribute>

public class ResourceData
  {
    static ResourceData()
    {
      Resources = new Dictionary<string, List<string>>();
    }
 
    public static void AddResource(string name)
    {
      AddResource(name, "");
    }
 
    public static void AddResource(string name,string action)
    {
      if (string.IsNullOrEmpty(name))
      {
        return;
      }
      if (!Resources.ContainsKey(name))
      {
        Resources.Add(name, new List<string>());
      }
 
      if (!string.IsNullOrEmpty(action) && !Resources[name].Contains(action))
      {
        Resources[name].Add(action);
      }
    }
 
    public static Dictionary<string, List<string>> Resources { get; set; }
  }