magicajax-0.3.0-source/Core/Util.cs

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#region LGPL License
/*
MagicAjax.NET Framework
Copyright (C) 2005  MagicAjax Project Team

This library is free software; you can redistribute it and/or
modify it under the terms of the GNU Lesser General Public
License as published by the Free Software Foundation; either
version 2.1 of the License, or (at your option) any later version.

This library is distributed in the hope that it will be useful,
but WITHOUT ANY WARRANTY; without even the implied warranty of
MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
Lesser General Public License for more details.

You should have received a copy of the GNU Lesser General Public
License along with this library; if not, write to the Free Software
Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA
*/
#endregion

using System;
using System.Collections;
using System.Web;
using System.Web.UI;
using System.Web.UI.HtmlControls;
using System.Security.Cryptography;
using System.Text;
using System.Text.RegularExpressions;

namespace MagicAjax
{
	/// <summary>
	/// Helper methods intented to be used internally be the framework.
	/// </summary>
	internal class Util
	{
		public const string ScriptPattern = "<script.[^>]*>";
		public const string FormElementPattern = @"<(?<tag>input|textarea|select)\s+(?<attribute>(?<attrname>[-\w]+)=(""(?<attrvalue>.*?)""\s*|'(?<attrvalue>.*?)'\s*|(?<attrvalue>[-\w]+)\s*))*.*?(/>|>((?<inner>.*?)</\k'tag'>)?)";
		public const string StyleElementPattern = @"<(?<tag>style|link)\s*(?<attribute>(?<attrname>[-\w]+)=((""|')(?<attrvalue>.*?)(""|')\s*|(?<attrvalue>[-\w]+)\s*))*.*?(/>|>(?<inner>.*?)</\k'tag'>)";

		#region Global Regular Expressions
		private static RegexOptions _options = RegexOptions.Singleline | RegexOptions.IgnoreCase | RegexOptions.Compiled | RegexOptions.ExplicitCapture;
		public static Regex FormElementRegEx = new Regex(Util.FormElementPattern, _options);
		public static Regex FormElementOptionsRegEx = new Regex("<option\\s((?<attrname>[-\\w]+)=\"(?<attrvalue>.*?)\"\\s?)*\\s*>.*?</option>", _options);
		public static Regex FormElementOptionSelectedRegEx = new Regex(@"<option.*?(?<selected>selected=(""|'|)selected(""|'|)(\s+|(?=>))).*?>", _options);
		public static Regex ScriptPatternRegEx = new Regex(Util.ScriptPattern, RegexOptions.IgnoreCase);
		public static Regex ScriptTagsRegEx = new Regex("<script\\s((?<attrname>[-\\w]+)=[\"'](?<attrvalue>.*?)[\"']\\s?)*\\s*>(?<script>.*?)</script>", _options);
		public static Regex HeaderStyleTagsRegEx = new Regex(StyleElementPattern, _options);
		#endregion

		/// <summary>
		///	Gets the ClientID of the given Page's Form.
		/// </summary>
		/// <param name="page"></param>
		/// <returns></returns>
		public static string GetPageFormID(Page page)
		{
			string id = null;
#if NET_2_0