code/Athena0.0.1/common/Util/WebHelper.cs

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using System.Collections.Generic;
using System.IO;
using System.Net;
using System.Text;
using System.Web;
using Athena.common.Util.Extension;
using System;
using System.Text.RegularExpressions;

namespace Athena.common.Util
{
    /// <summary>
    /// Web操作
    /// </summary>
    public static class WebHelper
    {
        #region Host(获取主机名)

        /// <summary>
        /// 获取主机名,即域名，
        /// 范例：用户输入网址http://www.a.com/b.htm?a=1&amp;b=2，
        /// 返回值为: www.a.com
        /// </summary>
        public static string Host
        {
            get
            {
                return HttpContext.Current.Request.Url.Host;
            }
        }
        #endregion

        #region ResolveUrl(解析相对Url)

        /// <summary>
        /// 解析相对Url
        /// </summary>
        /// <param name="relativeUrl">相对Url</param>
        public static string ResolveUrl(string relativeUrl)
        {
            if (string.IsNullOrWhiteSpace(relativeUrl))
                return string.Empty;
            relativeUrl = relativeUrl.Replace("\\", "/");
            if (relativeUrl.StartsWith("/"))
                return relativeUrl;
            if (relativeUrl.Contains("://"))
                return relativeUrl;
            return VirtualPathUtility.ToAbsolute(relativeUrl);
        }

        #endregion

        #region HtmlEncode(对html字符串进行编码)

        /// <summary>
        /// 对html字符串进行编码
        /// </summary>
        /// <param name="html">html字符串</param>
        public static string HtmlEncode(string html)
        {