HtmlAgilityPack錯誤的解析<輸入

我想從我的輸入使用HtmlAgilityPack刪除任何腳本。HtmlAgilityPack錯誤的解析<輸入

我輸入：

<div>If the amount<500 show results. Else do not show results.<mytag1>This is an xml element</mytag1></div><script>alert("welcome");</script>

預期結果：

<div>If the amount<500 show results. Else do not show results.<mytag1>This is an xml element</mytag1></div>

最終結果：

<div>If the amount<500 show="" results.="" else="" do="" not="" /><mytag1>This is an xml element</mytag1></div>

這裏是我的代碼

public HashSet<string> BlackList = new HashSet<string>() 
    { 
      { "script" }, 
      { "iframe" }, 
      { "form" }, 
      { "head" }, 
      { "meta" }, 
      { "comment" } 
    }; 
    public static string GetSafeHtmlString(string sInputString) 
    {   
     HtmlDocument doc = new HtmlDocument();   
     doc.OptionFixNestedTags = true; 
     //doc.OptionAutoCloseOnEnd = true; 
     doc.OptionDefaultStreamEncoding = System.Text.Encoding.UTF8; 

     doc.LoadHtml(HttpUtility.HtmlDecode(sInputString)); 

     HtmlSanitizer sanitizer = new HtmlSanitizer(); 
     sanitizer.SanitizeHtmlNode(doc.DocumentNode); 

     string output = null; 

     using (StringWriter sw = new StringWriter()) 
     { 
      XmlWriter writer = new XmlTextWriter(sw); 
      doc.DocumentNode.WriteTo(writer); 
      output = sw.ToString(); 

      if (!string.IsNullOrEmpty(output)) 
      { 
       int at = output.IndexOf("?>"); 
       output = output.Substring(at + 2); 
      } 
      writer.Close(); 
     }   

     doc = null;   

     return output; 
    } 
    private void SanitizeHtmlNode(HtmlNode node) 
    { 
     if (node.NodeType == HtmlNodeType.Element) 
     { 
      // check for blacklist items and remove 
      if (BlackList.Contains(node.Name)) 
      { 
       node.Remove(); 
       return; 
      } 
     } 

     if (node.HasChildNodes) 
     { 
      for (int i = node.ChildNodes.Count - 1; i >= 0; i--) 
      { 
       SanitizeHtmlNode(node.ChildNodes[i]); 
      } 
     } 
    }

我如何得到預期的結果。 html解析器將<作爲新的html標籤的開始。如何在輸入中添加不是html標籤開頭的「<」（小於）字符。

來源

2015-11-24 sreddy

HtmlAgilityPack錯誤的解析<輸入

回答

相關問題