.net core xss攻擊防御的方法

 public class XSS
 {
 private HtmlSanitizer sanitizer;
 public XSS()
 {
 sanitizer = new HtmlSanitizer();
 //sanitizer.AllowedTags.Add("div");//標簽白名單
 sanitizer.AllowedAttributes.Add("class");//標簽屬性白名單,默認沒有class標簽屬性 
 //sanitizer.AllowedCssProperties.Add("font-family");//CSS屬性白名單
 }

 /// <summary>
 /// XSS過濾
 /// </summary>
 /// <param name="html">html代碼</param>
 /// <returns>過濾結果</returns>
 public string Filter(string html)
 {
 string str = sanitizer.Sanitize(html);
 return str;
 }
 }

 public class FieldFilterAttribute : Attribute,IActionFilter
 {
 private XSS xss;
 public FieldFilterAttribute()
 {
 xss = new XSS();
 }

 //在Action方法之回之后調用
 public void OnActionExecuted(ActionExecutedContext context)
 {

 }

 //在調用Action方法之前調用
 public void OnActionExecuting(ActionExecutingContext context)
 {
 //獲取Action參數集合
 var ps = context.ActionDescriptor.Parameters;
 //遍歷參數集合
 foreach (var p in ps)
 {
 if (context.ActionArguments[p.Name] != null)
 {
 //當參數等于字符串
 if (p.ParameterType.Equals(typeof(string)))
 {
 context.ActionArguments[p.Name] = xss.Filter(context.ActionArguments[p.Name].ToString());
 }
 else if (p.ParameterType.IsClass)//當參數等于類
 {
 ModelFieldFilter(p.Name, p.ParameterType, context.ActionArguments[p.Name]);
 }
 } 

 }
 }

 /// <summary>
 /// 遍歷修改類的字符串屬性
 /// </summary>
 /// <param name="key">類名</param>
 /// <param name="t">數據類型</param>
 /// <param name="obj">對象</param>
 /// <returns></returns>
 private object ModelFieldFilter(string key, Type t, object obj)
 {
 //獲取類的屬性集合
 var ats = t.GetCustomAttributes(typeof(FieldFilterAttribute), false);


 if (obj != null)
 {
 //獲取類的屬性集合
 var pps = t.GetProperties();

 foreach (var pp in pps)
 {
 if(pp.GetValue(obj) != null)
 {
 //當屬性等于字符串
 if (pp.PropertyType.Equals(typeof(string)))
 {
 string value = pp.GetValue(obj).ToString();
 pp.SetValue(obj, xss.Filter(value));
 }
 else if (pp.PropertyType.IsClass)//當屬性等于類進行遞歸
 {
 pp.SetValue(obj, ModelFieldFilter(pp.Name, pp.PropertyType, pp.GetValue(obj)));
 }
 }
 
 }
 }

 return obj;
 }
 }

 //屬性過濾器
 [FieldFilter]
 public class NoteBookController : ManageController
 {
 //筆記操作接口
 private INoteBookAppService _noteBookApp;
 public NoteBookController(INoteBookAppService noteBookApp)
 {
 this._noteBookApp = noteBookApp;
 }
 public IActionResult Tab()
 {
 return View();
 }

 }