panel
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c
227
NetPanel.Help/HtmlTag.cs
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227
NetPanel.Help/HtmlTag.cs
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using System;
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using System.Collections;
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using System.Collections.Generic;
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using System.Net;
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using System.Text;
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using System.Text.RegularExpressions;
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namespace NetPanel.Help
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{
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public class HtmlTag
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{
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private String m_Name;
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private String m_BeginTag;
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private String m_InnerHTML;
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private Hashtable m_Attributes = new Hashtable();
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static Regex attrReg = new Regex(@"([a-zA-Z1-9_-]+)\s*=\s*(\x27|\x22)([^\x27\x22]*)(\x27|\x22)", RegexOptions.IgnoreCase);
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private HtmlTag(string name, string beginTag, string innerHTML)
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{
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m_Name = name;
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m_BeginTag = beginTag;
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m_InnerHTML = innerHTML;
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MatchCollection matchs = attrReg.Matches(beginTag);
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foreach (Match match in matchs)
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{
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m_Attributes[match.Groups[1].Value.ToUpper()] = match.Groups[3].Value;
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}
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}
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public string GetBeginTag()
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{
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return m_BeginTag;
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}
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public List<HtmlTag> FindTag(String name)
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{
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return FindTag(m_InnerHTML, name, String.Format(@"<{0}(\s[^<>]*|)>", name));
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}
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public List<HtmlTag> FindImgTag()
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{
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return FindTag(m_InnerHTML, "img", @"<img\b[^<>]*?\bsrc[\s\t\r\n]*=[\s\t\r\n]*[""']?[\s\t\r\n]*(?<imgUrl>[^\s\t\r\n""'<>]*)[^<>]*?/?[\s\t\r\n]*>");
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}
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public List<HtmlTag> FindTag(String name, String format)
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{
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return FindTag(m_InnerHTML, name, format);
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}
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public List<HtmlTag> FindTagByAttr(String tagName, String attrName, String attrValue)
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{
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return FindTagByAttr(m_InnerHTML, tagName, attrName, attrValue);
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}
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public String TagName
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{
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get { return m_Name; }
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}
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public String InnerHTML
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{
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get { return m_InnerHTML; }
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}
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public String InnerText
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{
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get { return checkStr(m_InnerHTML); }
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}
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public String GetAttribute(string name)
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{
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return m_Attributes[name.ToUpper()] as String;
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}
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public String FindDate
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{
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get
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{
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Match m = Regex.Match(InnerText, @"(?<date>((1[6-9]|[2-3]\d)\d{2})-(\d{1,2})-(\d{1,2}))");
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if (m.Groups.Count > 0)
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{
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return m.Groups["date"].Value;
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}
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else
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{
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return null;
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}
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}
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}
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public static string checkStr2(string html)
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{
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html = html.Replace("<br>", "$br$");
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html = html.Replace("<br/>", "$br/$");
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System.Text.RegularExpressions.Regex regex1 = new System.Text.RegularExpressions.Regex(@"<script[\s\S]+</script *>", System.Text.RegularExpressions.RegexOptions.IgnoreCase);
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System.Text.RegularExpressions.Regex regex2 = new System.Text.RegularExpressions.Regex(@" href *= *[\s\S]*script *:", System.Text.RegularExpressions.RegexOptions.IgnoreCase);
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System.Text.RegularExpressions.Regex regex3 = new System.Text.RegularExpressions.Regex(@" no[\s\S]*=", System.Text.RegularExpressions.RegexOptions.IgnoreCase);
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System.Text.RegularExpressions.Regex regex4 = new System.Text.RegularExpressions.Regex(@"<iframe[\s\S]+</iframe *>", System.Text.RegularExpressions.RegexOptions.IgnoreCase);
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System.Text.RegularExpressions.Regex regex5 = new System.Text.RegularExpressions.Regex(@"<frameset[\s\S]+</frameset *>", System.Text.RegularExpressions.RegexOptions.IgnoreCase);
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System.Text.RegularExpressions.Regex regex6 = new System.Text.RegularExpressions.Regex(@"\<img[^\>]+\>", System.Text.RegularExpressions.RegexOptions.IgnoreCase);
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System.Text.RegularExpressions.Regex regex7 = new System.Text.RegularExpressions.Regex(@"</p>", System.Text.RegularExpressions.RegexOptions.IgnoreCase);
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System.Text.RegularExpressions.Regex regex8 = new System.Text.RegularExpressions.Regex(@"<p>", System.Text.RegularExpressions.RegexOptions.IgnoreCase);
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System.Text.RegularExpressions.Regex regex9 = new System.Text.RegularExpressions.Regex(@"<[^>]*>", System.Text.RegularExpressions.RegexOptions.IgnoreCase);
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html = regex1.Replace(html, ""); //过滤<script></script>标记
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html = regex2.Replace(html, ""); //过滤href=javascript: (<A>) 属性
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html = regex3.Replace(html, " _disibledevent="); //过滤其它控件的on...事件
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html = regex4.Replace(html, ""); //过滤iframe
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html = regex5.Replace(html, ""); //过滤frameset
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html = regex6.Replace(html, ""); //过滤frameset
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// html = regex7.Replace(html, ""); //过滤frameset
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// html = regex8.Replace(html, ""); //过滤frameset
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html = regex9.Replace(html, "");
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html = html.Replace(" ", "");
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html = html.Replace("</strong>", "");
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html = html.Replace("<strong>", "");
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html = html.Replace("$br$", "<br>");
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html = html.Replace("$br/$", "<br/>");
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return html;
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}
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public static string checkStr(string html)
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{
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if (string.IsNullOrEmpty(html))
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{
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return html;
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}
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System.Text.RegularExpressions.Regex regex1 = new System.Text.RegularExpressions.Regex(@"<script[\s\S]+</script *>", System.Text.RegularExpressions.RegexOptions.IgnoreCase);
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System.Text.RegularExpressions.Regex regex2 = new System.Text.RegularExpressions.Regex(@" href *= *[\s\S]*script *:", System.Text.RegularExpressions.RegexOptions.IgnoreCase);
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System.Text.RegularExpressions.Regex regex3 = new System.Text.RegularExpressions.Regex(@" no[\s\S]*=", System.Text.RegularExpressions.RegexOptions.IgnoreCase);
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System.Text.RegularExpressions.Regex regex4 = new System.Text.RegularExpressions.Regex(@"<iframe[\s\S]+</iframe *>", System.Text.RegularExpressions.RegexOptions.IgnoreCase);
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System.Text.RegularExpressions.Regex regex5 = new System.Text.RegularExpressions.Regex(@"<frameset[\s\S]+</frameset *>", System.Text.RegularExpressions.RegexOptions.IgnoreCase);
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System.Text.RegularExpressions.Regex regex6 = new System.Text.RegularExpressions.Regex(@"\<img[^\>]+\>", System.Text.RegularExpressions.RegexOptions.IgnoreCase);
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System.Text.RegularExpressions.Regex regex7 = new System.Text.RegularExpressions.Regex(@"</p>", System.Text.RegularExpressions.RegexOptions.IgnoreCase);
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System.Text.RegularExpressions.Regex regex8 = new System.Text.RegularExpressions.Regex(@"<p>", System.Text.RegularExpressions.RegexOptions.IgnoreCase);
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System.Text.RegularExpressions.Regex regex9 = new System.Text.RegularExpressions.Regex(@"<[^>]*>", System.Text.RegularExpressions.RegexOptions.IgnoreCase);
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html = regex1.Replace(html, ""); //过滤<script></script>标记
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html = regex2.Replace(html, ""); //过滤href=javascript: (<A>) 属性
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html = regex3.Replace(html, " _disibledevent="); //过滤其它控件的on...事件
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html = regex4.Replace(html, ""); //过滤iframe
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html = regex5.Replace(html, ""); //过滤frameset
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html = regex6.Replace(html, ""); //过滤frameset
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html = regex7.Replace(html, ""); //过滤frameset
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html = regex8.Replace(html, ""); //过滤frameset
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html = regex9.Replace(html, "");
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html = html.Replace(" ", "");
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html = html.Replace("</strong>", "");
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html = html.Replace("<strong>", "");
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html = html.Replace(" ", " ");
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return html;
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}
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public static string HtmlToText(string str)
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{
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string m_outstr = str;
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m_outstr = new Regex(@"(?m)<script[^>]*>(\w|\W)*?</script[^>]*>", RegexOptions.Multiline | RegexOptions.IgnoreCase).Replace(m_outstr, "");
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m_outstr = new Regex(@"(?m)<style[^>]*>(\w|\W)*?</style[^>]*>", RegexOptions.Multiline | RegexOptions.IgnoreCase).Replace(m_outstr, "");
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m_outstr = new Regex(@"(?m)<select[^>]*>(\w|\W)*?</select[^>]*>", RegexOptions.Multiline | RegexOptions.IgnoreCase).Replace(m_outstr, "");
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//m_outstr = new Regex(@"(?m)<a[^>]*>(\w|\W)*?</a[^>]*>", RegexOptions.Multiline | RegexOptions.IgnoreCase).Replace(m_outstr, "");
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Regex objReg = new System.Text.RegularExpressions.Regex("(<[^>]+?>)| ", RegexOptions.Multiline | RegexOptions.IgnoreCase);
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m_outstr = objReg.Replace(m_outstr, "");
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Regex objReg2 = new System.Text.RegularExpressions.Regex("(\\s)+", RegexOptions.Multiline | RegexOptions.IgnoreCase);
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m_outstr = objReg2.Replace(m_outstr, " ");
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return m_outstr;
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}
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/// <summary>
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/// 在文本html的文本查找标志名为tagName,并且属性attrName的值为attrValue的所有标志
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/// 例如：FindTagByAttr(html, "div", "class", "demo")
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/// 返回所有class为demo的div标志
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/// </summary>
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public static List<HtmlTag> FindTagByAttr(String html, String tagName, String attrName, String attrValue)
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{
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String format = String.Format(@"<{0}\s[^<>]*{1}\s*=\s*(\x27|\x22){2}(\x27|\x22)[^<>]*>", tagName, attrName, attrValue);
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return FindTag(html, tagName, format);
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}
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public static List<HtmlTag> FindTag(String html, String name, String format)
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{
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Regex reg = new Regex(format, RegexOptions.IgnoreCase);
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Regex tagReg = new Regex(String.Format(@"<(\/|)({0})(\s[^<>]*|)>", name), RegexOptions.IgnoreCase);
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List<HtmlTag> tags = new List<HtmlTag>();
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int start = 0;
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while (true)
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{
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Match match = reg.Match(html, start);
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if (match.Success)
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{
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start = match.Index + match.Length;
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Match tagMatch = null;
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int beginTagCount = 1;
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while (true)
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{
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tagMatch = tagReg.Match(html, start);
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if (!tagMatch.Success)
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{
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tagMatch = null;
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break;
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}
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start = tagMatch.Index + tagMatch.Length;
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if (tagMatch.Groups[1].Value == "/") beginTagCount--;
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else beginTagCount++;
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if (beginTagCount == 0) break;
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}
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if (tagMatch != null)
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{
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HtmlTag tag = new HtmlTag(name, match.Value, html.Substring(match.Index + match.Length, tagMatch.Index - match.Index - match.Length));
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tags.Add(tag);
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}
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else
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{
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break;
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}
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}
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else
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{
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break;
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}
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}
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return tags;
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}
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}
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}
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