public string FilterHtml(string input)
{
if (string.IsNullOrWhiteSpace(input))
{
return(string.Empty);
}
if (SiteConfiguration.ValidCommentTags == null || SiteConfiguration.ValidCommentTags[0].Tag.Count(s => s.Allowed == true) == 0)
{
return(WebUtility.HtmlEncode(input));
}
// check for matches
var matches = htmlFilterRegex.Matches(input);
// no matches, normal encoding
if (matches.Count == 0)
{
return(WebUtility.HtmlEncode(input));
}
var sb = new StringBuilder();
var collection = new MatchedTagCollection(SiteConfiguration.ValidCommentTags);
collection.Init(matches);
int inputIndex = 0;
foreach (MatchedTag tag in collection)
{
// add the normal text between the current index and the index of the current tag
if (inputIndex < tag.Index)
{
sb.Append(WebUtility.HtmlEncode(input.Substring(inputIndex, tag.Index - inputIndex)));
}
// add the filtered value
sb.Append(tag.FilteredValue);
// move the current index past the tag
inputIndex = tag.Index + tag.Length;
}
// add remainder
if (inputIndex < input.Length)
{
sb.Append(WebUtility.HtmlEncode(input.Substring(inputIndex)));
}
return(sb.ToString());
}
public string FilterHtml(string input)
{
#if POSIX
return(input);
#else
if (SiteConfiguration.AllowedTags == null || SiteConfiguration.AllowedTags.Count == 0)
{
return(WebUtility.HtmlEncode(input));
}
// check for matches
MatchCollection matches = htmlFilterRegex.Matches(input);
// no matches, normal encoding
if (matches.Count == 0)
{
return(WebUtility.HtmlEncode(input));
}
StringBuilder sb = new StringBuilder();
MatchedTagCollection collection = new MatchedTagCollection(SiteConfiguration.AllowedTags);
collection.Init(matches);
int inputIndex = 0;
foreach (MatchedTag tag in collection)
{
// add the normal text between the current index and the index of the current tag
if (inputIndex < tag.Index)
{
sb.Append(WebUtility.HtmlEncode(input.Substring(inputIndex, tag.Index - inputIndex)));
}
// add the filtered value
sb.Append(tag.FilteredValue);
// move the current index past the tag
inputIndex = tag.Index + tag.Length;
}
// add remainder
if (inputIndex < input.Length)
{
sb.Append(WebUtility.HtmlEncode(input.Substring(inputIndex)));
}
return(sb.ToString());
#endif // #if POSIX #else
}