.Net集成敏感词组件的步骤

    public class MinganCheckInput
    {
        [MinGanCheck]
        public string Text { get; set; }
    }
    
    public class MinganReplaceInput
    {
        [MinGanReplace]
        public string Text { get; set; }
    }

  /// <summary>
    /// 敏感词检查的特性，一匹配就抛异常
    /// </summary>
    [AttributeUsage(AttributeTargets.Property)]
    public class MinGanCheck : ValidationAttribute
    {
        protected override ValidationResult IsValid(object value, ValidationContext validationContext)
        {
            throw  new NotImplementedException();
        }
    }

    /// <summary>
    /// 敏感词替换
    /// </summary>
    [AttributeUsage(AttributeTargets.Property)]
    public class MinGanReplace : ValidationAttribute
    {
        protected override ValidationResult IsValid(object value, ValidationContext validationContext)
        {
            return ValidationResult.Success;
        }
    }

       // 检查
        protected override ValidationResult IsValid(object value, ValidationContext validationContext)
        {
            return validationContext.GetService<IMinGanCheckValidator>().IsValid(value, validationContext);
        }
        // 替换
        protected override ValidationResult IsValid(object value, ValidationContext validationContext)
        {
            validationContext.GetService<IMinGanReplaceValidator>().IsValid(value, validationContext);
            return ValidationResult.Success;
        }

// 检查
   public class MinGanCheckValidator : IMinGanCheckValidator
    {
        public ValidationResult IsValid(object value, ValidationContext validationContext)
        {
            if (value is string v)
            {
                if (!String.IsNullOrEmpty(v))
                {
                   // 文字检查
                    if (MinGanProvider.Instance.IllegalWordsSearch.ContainsAny(v))
                    {
                        return new ValidationResult("存在敏感词", new[] { validationContext.MemberName });
                    }
                    // 检查拼音
                    if (MinGanProvider.Instance.IllegalWordsSearch.ContainsAny(WordsHelper.GetPinyin(v)))
                    {
                        return new ValidationResult("存在敏感词",new []{ validationContext.MemberName });
                    }
                    // todo:其他变种
                }
            }
            return ValidationResult.Success;
        }
    }

//替换
 public class MinGanReplaceValidator : IMinGanReplaceValidator
    {
        public void Replace(object value, ValidationContext validationContext)
        {
            if (value is string v)
            {
                if (!String.IsNullOrEmpty(v))
                {
                    v = MinGanProvider.Instance.IllegalWordsSearch.Replace(v);
                    SetPropertyByName(validationContext.ObjectInstance,validationContext.MemberName, v);
                }
            }
        }
        
        static bool SetPropertyByName(Object obj, string name, Object value)
        {
            var type = obj.GetType();
            var prop = type.GetProperty(name, BindingFlags.Public | BindingFlags.Instance);
            if (null == prop || !prop.CanWrite) return false;
            prop.SetValue(obj, value, null);
            return true;
        }
    }

          public static IHostBuilder CreateHostBuilder(string[] args) =>
            Host.CreateDefaultBuilder(args)
                .ConfigureAppConfiguration((builderContext, config) =>
                {
                    config.AddJsonFile("IllegalKeywords.json", optional: false, reloadOnChange: true);// 配置可热重载
                })
                .ConfigureWEBHostDefaults(webBuilder => { webBuilder.UseStartup<Startup>(); });

           ChangeToken.OnChange(() => Configuration.GetReloadToken(), () =>
            {
                // 敏感词重载
            var keys= Configuration.GetSection("IllegalKeywords").Get<List<string>>();
            if (keys!=null&&keys.Any())
            {
                var allKeys = new List<string>();
                foreach (var k in keys)
                {
                    allKeys.Add(k); // 增加词汇
                    allKeys.Add(WordsHelper.ToTraditionalChinese(k)); // 增加繁体
                    allKeys.Add(WordsHelper.GetPinyin(k)); // 增加拼音
                }
                IllegalWordsSearch.SeTKEywords(allKeys);
            }
            });