src/Library/NetPro.Web.Api/Helper/CommonHelper.cs

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using System.Collections.Generic;
using System.ComponentModel;
using System.Globalization;
using System.Linq;
using System.Net;
using System.Security.Cryptography;
using System.Text.RegularExpressions;

namespace System.NetPro
{
    /// <summary>
    /// 常用公共操作
    /// </summary>
    internal static class CommonHelper
    {
        #region Fields

        private static readonly Regex _emailRegex = new Regex(_emailExpression, RegexOptions.IgnoreCase);
        //we use EmailValidator from FluentValidation. So let's keep them sync - https://github.com/JeremySkinner/FluentValidation/blob/master/src/FluentValidation/Validators/EmailValidator.cs
        private const string _emailExpression = @"^((([a-z]|\d|[!#\$%&'\*\+\-\/=\?\^_`{\|}~]|[\u00A0-\uD7FF\uF900-\uFDCF\uFDF0-\uFFEF])+(\.([a-z]|\d|[!#\$%&'\*\+\-\/=\?\^_`{\|}~]|[\u00A0-\uD7FF\uF900-\uFDCF\uFDF0-\uFFEF])+)*)|((\x22)((((\x20|\x09)*(\x0d\x0a))?(\x20|\x09)+)?(([\x01-\x08\x0b\x0c\x0e-\x1f\x7f]|\x21|[\x23-\x5b]|[\x5d-\x7e]|[\u00A0-\uD7FF\uF900-\uFDCF\uFDF0-\uFFEF])|(\\([\x01-\x09\x0b\x0c\x0d-\x7f]|[\u00A0-\uD7FF\uF900-\uFDCF\uFDF0-\uFFEF]))))*(((\x20|\x09)*(\x0d\x0a))?(\x20|\x09)+)?(\x22)))@((([a-z]|\d|[\u00A0-\uD7FF\uF900-\uFDCF\uFDF0-\uFFEF])|(([a-z]|\d|[\u00A0-\uD7FF\uF900-\uFDCF\uFDF0-\uFFEF])([a-z]|\d|-||_|~|[\u00A0-\uD7FF\uF900-\uFDCF\uFDF0-\uFFEF])*([a-z]|\d|[\u00A0-\uD7FF\uF900-\uFDCF\uFDF0-\uFFEF])))\.)+(([a-z]|[\u00A0-\uD7FF\uF900-\uFDCF\uFDF0-\uFFEF])+|(([a-z]|[\u00A0-\uD7FF\uF900-\uFDCF\uFDF0-\uFFEF])+([a-z]+|\d|-|\.{0,1}|_|~|[\u00A0-\uD7FF\uF900-\uFDCF\uFDF0-\uFFEF])?([a-z]|[\u00A0-\uD7FF\uF900-\uFDCF\uFDF0-\uFFEF])))$";

        #endregion

        /// <summary>
        /// 获取类型
        /// </summary>
        /// <typeparam name="T">类型</typeparam>
        public static Type GetType<T>()
        {
            return GetType(typeof(T));
        }

        /// <summary>
        /// 获取类型
        /// </summary>
        /// <param name="type">类型</param>
        public static Type GetType(Type type)
        {
            return Nullable.GetUnderlyingType(type) ?? type;
        }

        /// <summary>
        /// 换行符
        /// </summary>
        public static string Line => Environment.NewLine;

        /// <summary>
        /// 验证邮箱是否合法
        /// </summary>
        /// <param name="email">被验证的邮箱地址</param>
        /// <returns>true成功,false失败</returns>
        public static bool IsValidEmail(string email)
        {
            if (string.IsNullOrEmpty(email))
                return false;

            email = email.Trim();

            return _emailRegex.IsMatch(email);
        }