LogEncoder.cs :  » Bloggers » dasBlog » newtelligence » DasBlog » Runtime » C# / CSharp Open Source

using System;
using System.Text.RegularExpressions;

namespace newtelligence.DasBlog.Runtime{
  public static class LogEncoder
  {
    static readonly Regex badTagsRegEx =
      new Regex("<(?!span|/span|br/|br|/br|p|/p|a|/a)([^\"]+?|.+?\".*?\".*?)>",
                RegexOptions.IgnoreCase | RegexOptions.Compiled | RegexOptions.Singleline);

    public static string Encode(string input)
    {
      if (input != null)
      {
        return input.Replace("<", "&lt;").Replace(">", "&gt;");
      }
      else
      {
        return null;
      }
    }

    public static string EncodeBadTags(string input)
    {
      if (input != null)
      {
        foreach (Match match in badTagsRegEx.Matches(input))
        {
          input = input.Replace(match.Value, match.Value.Replace("<", "&lt;").Replace(">", "&gt;"));
        }

        return input;
      }
      else
      {
        return null;
      }
    }
  }
}