在.Net MVC结构API接口中推断http头信息实现公共的权限验证过滤器演示样例

//control   action 

public class TestController : ApiController
{
	[MyAuthFilter]
	public string test(string str)
	{
		return str.Trim();
	}
}

	//过虑器类
    public class MyAuthFilter : ActionFilterAttribute
    {
        const string SecurityKeyName = "MySecurityKey";//http头的name
        public object _EBACLS = new object();
        public override void OnActionExecuting(System.Web.Http.Controllers.HttpActionContext actionContext)
        {
            if (EBPermission == "1")//推断权限
            {
                if (EBACLS == null)
                {
                    lock (_EBACLS)
                    {
                        EBACLS = SetEBACLSData();
                    }
                }
                bool isAuth = false;
                bool isPermission = false;
                EBSecurityData EBSecurityData = null;//自己定义对象
                IEnumerable<string> lists;
                if (actionContext.Request.Headers.TryGetValues(SecurityKeyName, out lists))
                {
                    string securityKey = lists.FirstOrDefault();
                    LogUtility.WriteLog(SecurityKeyName + securityKey);//写日志文件
                    try
                    {
                        EBSecurityData = EBSecurityUtility.GetSecurityData(securityKey);//解密得到的加密串
                        LogUtility.WriteLog("EBSecurityData：" + (EBSecurityData != null ? EBSecurityData.ObjectToJson() : ""));
                    }
                    catch (Exception)
                    { }
                    if (EBSecurityData != null && EBSecurityData.Expire > DateTime.Now && EBSecurityData.ProviderId > 0)
                    {
                        GenericIdentity identity = new GenericIdentity(EBSecurityData.ProviderId.ToString(), "Forms");
                        GenericPrincipal principal = new GenericPrincipal(identity, new string[] { });
                        HttpContext.Current.User = principal;
                        isAuth = true;

                        string actionName = actionContext.ActionDescriptor.ActionName.ToLower();
                        string actionNo;
                        EBACLS.TryGetValue(actionName, out actionNo);
                        if (!string.IsNullOrWhiteSpace(EBSecurityData.Acl) && !string.IsNullOrWhiteSpace(actionNo))
                        {
                            string acl = string.Format(",{0},", EBSecurityData.Acl);
                            isPermission = acl.Contains("," + actionNo + ",");
                        }
                    }
                }

                if (!isAuth)
                {
                    throw new BusinessException("登录验证失败", 401);
                }
                else if (!isPermission)
                {
                    throw new BusinessException("未授权", 403);
                }
            }
        }

        public static Dictionary<string, string> EBACLS { get; set; }

        Dictionary<string, string> SetEBACLSData()
        {
            Dictionary<string, string> dic = new Dictionary<string, string>();
            dic.Add("getorderitemoperaterecords", "01");
            dic.Add("getorderitemchangedetail", "02");
            return dic;
        }
    }

http头请求演示样例：

User-Agent: Fiddler
Host: localhost
Content-Length: 478
Content-Type: text/json
MySecurityKey: roxnQNJLa0voulfXMcGugvhKJT1njtDV1Hmu67MbGPIU0UlEVmKXjXkPJ5d7dn1HdD%2BPDM%2Fsa9IJn36NksxQE1MdQ8Mqt1JqhvTTvQfG3zhrSFYgMQVAe3AuYcEN%2F9873lIjXXyuK%2FUQ75vJ3kH3bYIZykRmSvR4fPMbxNVWhVHuhO%2BdVJJQDpLS2Pihy1KbjffkcMNYBZJWdPu%2FLzYCIesaLh%2FDC85IOUi9OOdWzaPMjbvPXoBN7ahN%2Fj%2BkmWNJiYBxPPVO3IU%3D

拿到了 MySecurityKey 的值 ，想怎么处理就怎么处理。我这里仅仅是一样演示样例，有效添加api安全系数。

假设哪个方法非常重要。要使用权限，仅仅要在上面加[MyAuthFilter] 标签，就能实现权限验证，当然，假设不同的方法 。也能够使用不同的过虑器~自己能够随便定义。