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@@ -1,7 +1,8 @@
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using Ganss.XSS;
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-using Masuit.Tools.Win32;
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+using HtmlAgilityPack;
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using System;
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using System.Collections.Generic;
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+using System.Linq;
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using System.Text.RegularExpressions;
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namespace Masuit.Tools.Html
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@@ -80,8 +81,9 @@ namespace Masuit.Tools.Html
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/// <returns></returns>
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public static string RemoveHtmlTag(this string html, int length = 0)
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{
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- string strText = Regex.Replace(html, "<[^>]+>", "");
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- strText = Regex.Replace(strText, "&[^;]+;", "");
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+ var doc = new HtmlDocument();
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+ doc.LoadHtml(html);
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+ var strText = doc.DocumentNode.InnerText;
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if (length > 0 && strText.Length > length)
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{
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return strText.Substring(0, length);
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@@ -104,41 +106,6 @@ namespace Masuit.Tools.Html
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return s;
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}
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- ///<summary>
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- /// 清除HTML标记
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- ///</summary>
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- ///<param name="htmlstring">包括HTML的源码</param>
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- ///<returns>已经去除后的文字</returns>
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- public static string RemoveHtml(this string htmlstring)
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- {
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- //删除脚本
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- htmlstring = Regex.Replace(htmlstring, "<script[^>]*?>.*?</script>", "", RegexOptions.IgnoreCase);
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-
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- //删除HTML
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- Regex regex = new Regex("<.+?>", RegexOptions.IgnoreCase);
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- htmlstring = regex.Replace(htmlstring, "");
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- htmlstring = Regex.Replace(htmlstring, "<(.[^>]*)>", "", RegexOptions.IgnoreCase);
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- htmlstring = Regex.Replace(htmlstring, @"([\r\n])[\s]+", "", RegexOptions.IgnoreCase);
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- htmlstring = Regex.Replace(htmlstring, "-->", "", RegexOptions.IgnoreCase);
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- htmlstring = Regex.Replace(htmlstring, "<!--.*", "", RegexOptions.IgnoreCase);
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- htmlstring = Regex.Replace(htmlstring, "&(quot|#34);", "\"", RegexOptions.IgnoreCase);
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- htmlstring = Regex.Replace(htmlstring, "&(amp|#38);", "&", RegexOptions.IgnoreCase);
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- htmlstring = Regex.Replace(htmlstring, "&(lt|#60);", "<", RegexOptions.IgnoreCase);
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- htmlstring = Regex.Replace(htmlstring, "&(gt|#62);", ">", RegexOptions.IgnoreCase);
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- htmlstring = Regex.Replace(htmlstring, "&(nbsp|#160);", " ", RegexOptions.IgnoreCase);
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- htmlstring = Regex.Replace(htmlstring, "&(iexcl|#161);", "\xa1", RegexOptions.IgnoreCase);
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- htmlstring = Regex.Replace(htmlstring, "&(cent|#162);", "\xa2", RegexOptions.IgnoreCase);
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- htmlstring = Regex.Replace(htmlstring, "&(pound|#163);", "\xa3", RegexOptions.IgnoreCase);
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- htmlstring = Regex.Replace(htmlstring, "&(copy|#169);", "\xa9", RegexOptions.IgnoreCase);
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- htmlstring = Regex.Replace(htmlstring, @"&#(\d+);", "", RegexOptions.IgnoreCase);
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-
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- htmlstring.Replace("<", "");
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- htmlstring.Replace(">", "");
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- htmlstring.Replace("\r\n", "");
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-
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- return htmlstring;
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- }
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-
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/// <summary>
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/// 替换html的img路径为绝对路径
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/// </summary>
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@@ -157,14 +124,18 @@ namespace Masuit.Tools.Html
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return Regex.Replace(s, @"<img src=""(http:\/\/.+?)/", @"<img src=""/");
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}
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- private static readonly Regex ImgRegex = new Regex(@"<img\b[^<>]*?\bsrc[\s\t\r\n]*=[\s\t\r\n]*[""']?[\s\t\r\n]*(?<src>[^\s\t\r\n""'<>]*)[^<>]*?/?[\s\t\r\n]*>");
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-
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/// <summary>
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/// 匹配html的所有img标签集合
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/// </summary>
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/// <param name="html"></param>
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/// <returns></returns>
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- public static MatchCollection MatchImgTags(this string html) => ImgRegex.Matches(html);
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+ public static IEnumerable<HtmlNode> MatchImgTags(this string html)
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+ {
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+ var doc = new HtmlDocument();
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+ doc.LoadHtml(html);
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+ var nodes = doc.DocumentNode.Descendants("img");
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+ return nodes;
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+ }
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/// <summary>
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/// 匹配html的所有img标签的src集合
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@@ -173,19 +144,9 @@ namespace Masuit.Tools.Html
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/// <returns></returns>
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public static IEnumerable<string> MatchImgSrcs(this string html)
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{
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- foreach (Match m in ImgRegex.Matches(html))
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- {
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- yield return m.Groups["src"].Value;
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- }
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+ return MatchImgTags(html).Where(n => n.Attributes.Contains("src")).Select(n => n.Attributes["src"].Value);
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}
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- /// <summary>
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- /// 匹配html的一个img标签
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- /// </summary>
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- /// <param name="html"></param>
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- /// <returns></returns>
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- public static Match MatchImgTag(this string html) => ImgRegex.Match(html);
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-
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/// <summary>
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/// 获取html中第一个img标签的src
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/// </summary>
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@@ -193,14 +154,7 @@ namespace Masuit.Tools.Html
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/// <returns></returns>
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public static string MatchFirstImgSrc(this string html)
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{
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- string src = ImgRegex.Match(html).Groups["src"].Value;
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- int index = src.IndexOf("\"", StringComparison.Ordinal);
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- if (index > 0)
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- {
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- src = src.Substring(0, index);
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- }
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-
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- return src;
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+ return MatchImgSrcs(html).FirstOrDefault();
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}
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/// <summary>
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@@ -210,20 +164,9 @@ namespace Masuit.Tools.Html
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/// <returns></returns>
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public static string MatchRandomImgSrc(this string html)
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{
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- var collection = ImgRegex.Matches(html);
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- if (collection.Count > 0)
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- {
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- string src = collection[new Random().StrictNext(collection.Count)].Groups["src"].Value;
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- int index = src.IndexOf("\"", StringComparison.Ordinal);
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- if (index > 0)
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- {
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- src = src.Substring(0, index);
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- }
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-
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- return src;
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- }
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-
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- return string.Empty;
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+ int count = MatchImgSrcs(html).Count();
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+ var rnd = new Random();
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+ return MatchImgSrcs(html).ElementAtOrDefault(rnd.Next(count));
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}
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/// <summary>
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