protected virtual void CaseCData(HtmlReader htmlReader, TextWriter result)
{
if (_enabled)
{
WriteCData(result, htmlReader.Value);
}
}
protected virtual void CaseElement(HtmlReader htmlReader, TextWriter result)
{
string tagName = htmlReader.Name.ToLowerInvariant();
// automatically close unclosed tag, if any
if (AutoClosedTags.Contains(tagName))
{
if (FuzzyPopTag(tagName))
{
WriteEndElement(result, RewriteTag(tagName));
}
}
// reevaluate tags stack
PushTag(tagName);
CheckStack();
if (_enabled && !IgnoreTags.Contains(tagName))
{
WriteElement(result, RewriteTag(tagName), htmlReader.Attributes, htmlReader.IsEmptyElement);
}
// pop empty tags immediately
if (htmlReader.IsEmptyElement || EmptyTags.Contains(tagName))
{
if (FuzzyPopTag(tagName))
{
CheckStack();
}
}
}
protected virtual void CaseEndElement(HtmlReader htmlReader, TextWriter result)
{
string tagName = htmlReader.Name.ToLowerInvariant();
if (FuzzyPopTag(tagName))
{
// only close tag if it was previously open
if (_enabled && !IgnoreTags.Contains(tagName))
{
WriteEndElement(result, RewriteTag(tagName));
}
CheckStack();
}
}
protected virtual void Sanitize(HtmlReader htmlReader, TextWriter result)
{
BeforeDocument(result);
var entity = string.Empty;
while (htmlReader.Read())
{
entity = htmlReader.Entity;
switch (htmlReader.NodeType)
{
case HtmlNodeType.Element:
CaseElement(htmlReader, result);
break;
case HtmlNodeType.EndElement:
CaseEndElement(htmlReader, result);
break;
case HtmlNodeType.Text:
CaseText(htmlReader, result);
break;
case HtmlNodeType.CDATA:
CaseCData(htmlReader, result);
break;
}
}
// close unclosed tags
while (_tags.Count > 0)
{
string tagName = PopTag();
CheckStack();
if (_enabled && !IgnoreTags.Contains(tagName))
{
WriteEndElement(result, tagName);
}
}
result.Write(entity);
if (!string.IsNullOrEmpty(htmlReader.Name))
{
result.Write("<{0}", htmlReader.Name);
}
AfterDocument(result);
result.Flush();
}
public void Sanitize(TextReader input, TextWriter result)
{
if (input == null)
{
throw new ArgumentNullException("input");
}
if (result == null)
{
throw new ArgumentNullException("result");
}
using (var htmlReader = new HtmlReader(input))
{
Sanitize(htmlReader, result);
}
Reset();
}
protected virtual void CaseCData(HtmlReader htmlReader, TextWriter result)
{
if (_enabled)
{
WriteCData(result, htmlReader.Value);
}
}
protected virtual void CaseEndElement(HtmlReader htmlReader, TextWriter result)
{
string tagName = htmlReader.Name.ToLowerInvariant();
if (FuzzyPopTag(tagName))
{
// only close tag if it was previously open
if (_enabled && !IgnoreTags.Contains(tagName))
{
WriteEndElement(result, RewriteTag(tagName));
}
CheckStack();
}
}
protected virtual void CaseElement(HtmlReader htmlReader, TextWriter result)
{
string tagName = htmlReader.Name.ToLowerInvariant();
// automatically close unclosed tag, if any
if (AutoClosedTags.Contains(tagName))
{
if (FuzzyPopTag(tagName))
{
WriteEndElement(result, RewriteTag(tagName));
}
}
// reevaluate tags stack
PushTag(tagName);
CheckStack();
if (_enabled && !IgnoreTags.Contains(tagName))
{
WriteElement(result, RewriteTag(tagName), htmlReader.Attributes, htmlReader.IsEmptyElement);
}
// pop empty tags immediately
if (htmlReader.IsEmptyElement || EmptyTags.Contains(tagName))
{
if (FuzzyPopTag(tagName))
{
CheckStack();
}
}
}
protected virtual void Sanitize(HtmlReader htmlReader, TextWriter result)
{
BeforeDocument(result);
var entity = string.Empty;
while (htmlReader.Read())
{
entity = htmlReader.Entity;
switch (htmlReader.NodeType)
{
case HtmlNodeType.Element:
CaseElement(htmlReader, result);
break;
case HtmlNodeType.EndElement:
CaseEndElement(htmlReader, result);
break;
case HtmlNodeType.Text:
CaseText(htmlReader, result);
break;
case HtmlNodeType.CDATA:
CaseCData(htmlReader, result);
break;
}
}
// close unclosed tags
while (_tags.Count > 0)
{
string tagName = PopTag();
CheckStack();
if (_enabled && !IgnoreTags.Contains(tagName))
{
WriteEndElement(result, tagName);
}
}
result.Write(entity);
if (!string.IsNullOrEmpty(htmlReader.Name))
result.Write("<{0}", htmlReader.Name);
AfterDocument(result);
result.Flush();
}
public void Sanitize(TextReader input, TextWriter result)
{
if (input == null)
{
throw new ArgumentNullException(nameof(input));
}
if (result == null)
{
throw new ArgumentNullException(nameof(result));
}
using (var htmlReader = new HtmlReader(input))
{
Sanitize(htmlReader, result);
}
Reset();
}
