using Furion.RemoteRequest.Extensions;
using System;
using System.Collections.Generic;
using System.IO;
using System.Linq;
using System.Net;
using System.Text;
using System.Text.RegularExpressions;
using System.Threading.Tasks;

namespace Vote.Services.Tools
{
    public class HtmlHelper
    {

        /// <summary>方法一：比较推荐
        /// 用HttpWebRequest取得网页源码
        /// 对于带BOM的网页很有效，不管是什么编码都能正确识别
        /// </summary>
        /// <param name="url">网页地址" </param>
        /// <returns>返回网页源文件</returns>
        public static string GetHtmlSource2(string url)
        {
            //处理内容
            string html = "";
            HttpWebRequest request = (HttpWebRequest)WebRequest.Create(url);
            request.Accept = "*/*"; //接受任意文件
            request.UserAgent = "Mozilla/4.0 (compatible; MSIE 6.0; Windows NT 5.2; .NET CLR 1.1.4322)";
            request.AllowAutoRedirect = true;//是否允许302
            //request.CookieContainer = new CookieContainer();//cookie容器，
            request.Referer = url; //当前页面的引用
            HttpWebResponse response = (HttpWebResponse)request.GetResponse();
            Stream stream = response.GetResponseStream();
            StreamReader reader = new StreamReader(stream, Encoding.Default);
            html = reader.ReadToEnd();
            stream.Close();
            return html;
        }
        //public static string CleanHtml(string strHtml)
        //{
        //    var r = new Regex(@"?[^>]*>", RegexOptions.IgnoreCase);
        //    Match m;
        //    for (m = r.Match(strHtml); m.Success; m = m.NextMatch())
        //    {
        //        strHtml = strHtml.Replace(m.Groups[0].ToString(), "");
        //    }
        //    return strHtml.Trim();
        //}
        /// <summary>
        /// 去掉HTML中的所有标签,只留下纯文本
        /// </summary>
        /// <param name="strHtml"></param>
        /// <returns></returns>

        public static string CleanHtml(string strHtml)
        {
            if (string.IsNullOrEmpty(strHtml)) return strHtml;
            //删除脚本
            //Regex.Replace(strHtml, @"<script[^>]*?>.*?</script>", "", RegexOptions.IgnoreCase)
            strHtml = Regex.Replace(strHtml, "(\\<script(.+?)\\</script\\>)|(\\<style(.+?)\\</style\\>)", "", RegexOptions.IgnoreCase | RegexOptions.Singleline);
            //删除标签
            var r = new Regex(@"</?[^>]*>", RegexOptions.IgnoreCase);
            Match m;
            for (m = r.Match(strHtml); m.Success; m = m.NextMatch())
            {
                strHtml = strHtml.Replace(m.Groups[0].ToString(), "");
            }
            return strHtml.Trim();
        }
        public static string HttpRequestGetImageBase64(string Url, int TimeOut = 100000)
        {
            try
            {
                HttpWebRequest request = (HttpWebRequest)HttpWebRequest.Create(Url);
                request.ContentType = "application/x-www-form-urlencoded";
                request.Method = "Get";
                request.Timeout = TimeOut;
                HttpWebResponse response = (HttpWebResponse)request.GetResponse();
                Stream responseStream = response.GetResponseStream();
                MemoryStream memoryStream = new MemoryStream();
                responseStream.CopyTo(memoryStream);
                byte[] buff = new byte[memoryStream.Length];
                memoryStream.Position = 0;
                memoryStream.Read(buff, 0, (int)memoryStream.Length);
                memoryStream.Close();
                return Convert.ToBase64String(buff);
            }
            catch (Exception ex)
            {
                return ex.Message;
            }
        }
    }
}