BaseParser.cs :  » 2.6.4-mono-.net-core » System.Web » System » Web » UI » C# / CSharp Open Source

//
// System.Web.UI.BaseParser.cs
//
// Authors:
//   Duncan Mak  (duncan@ximian.com)
//  Gonzalo Paniagua Javier (gonzalo@ximian.com)
//
// (C) 2002 Ximian, Inc. (http://www.ximian.com)
// Copyright (C) 2005-2010 Novell, Inc (http://www.novell.com)
//
// Permission is hereby granted, free of charge, to any person obtaining
// a copy of this software and associated documentation files (the
// "Software"), to deal in the Software without restriction, including
// without limitation the rights to use, copy, modify, merge, publish,
// distribute, sublicense, and/or sell copies of the Software, and to
// permit persons to whom the Software is furnished to do so, subject to
// the following conditions:
// 
// The above copyright notice and this permission notice shall be
// included in all copies or substantial portions of the Software.
// 
// THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND,
// EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF
// MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND
// NONINFRINGEMENT. IN NO EVENT SHALL THE AUTHORS OR COPYRIGHT HOLDERS BE
// LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN AN ACTION
// OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN CONNECTION
// WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE SOFTWARE.
//

using System.Collections;
using System.IO;
using System.Security.Permissions;
using System.Web.Compilation;
using System.Web.Configuration;
using System.Globalization;
using System.Web.Util;

namespace System.Web.UI{
  // CAS
  [AspNetHostingPermission (SecurityAction.LinkDemand, Level = AspNetHostingPermissionLevel.Minimal)]
  [AspNetHostingPermission (SecurityAction.InheritanceDemand, Level = AspNetHostingPermissionLevel.Minimal)]
  public class BaseParser
  {
    HttpContext context;
    string baseDir;
    string baseVDir;
    ILocation location;

    internal string MapPath (string path)
    {
      return MapPath (path, true);
    }

    internal string MapPath (string path, bool allowCrossAppMapping)
    {
      if (context == null)
        throw new HttpException ("context is null!!");

      return context.Request.MapPath (path, BaseVirtualDir, allowCrossAppMapping);
    }

    internal string PhysicalPath (string path)
    {
      if (Path.DirectorySeparatorChar != '/')
        path = path.Replace ('/', '\\');
        
      return Path.Combine (BaseDir, path);
    }

    internal bool GetBool (IDictionary hash, string key, bool deflt)
    {
      string val = hash [key] as string;
      if (val == null)
        return deflt;

      hash.Remove (key);

      bool result = false;
      if (String.Compare (val, "true", true, Helpers.InvariantCulture) == 0)
        result = true;
      else if (String.Compare (val, "false", true, Helpers.InvariantCulture) != 0)
        ThrowParseException ("Invalid value for " + key);

      return result;
    }

    internal static string GetString (IDictionary hash, string key, string deflt)
    {
      string val = hash [key] as string;
      if (val == null)
        return deflt;

      hash.Remove (key);
      return val;
    }

    internal static bool IsDirective (string value, char directiveChar)
    {
      if (value == null || value == String.Empty)
        return false;
      
      value = value.Trim ();
      if (!StrUtils.StartsWith (value, "<%") || !StrUtils.EndsWith (value, "%>"))
        return false;

      int dcIndex = value.IndexOf (directiveChar, 2);
      if (dcIndex == -1)
        return false;

      if (dcIndex == 2)
        return true;
      dcIndex--;
      
      while (dcIndex >= 2) {
        if (!Char.IsWhiteSpace (value [dcIndex]))
          return false;
        dcIndex--;
      }

      return true;
    }
    
    internal static bool IsDataBound (string value)
    {
      return IsDirective (value, '#');
    }

    internal static bool IsExpression (string value)
    {
      return IsDirective (value, '$');
    }
    
    internal void ThrowParseException (string message, params object[] parms)
    {
      if (parms == null)
        throw new ParseException (location, message);
      throw new ParseException (location, String.Format (message, parms));
    }
    
    internal void ThrowParseException (string message, Exception inner, params object[] parms)
    {
      if (parms == null || parms.Length == 0)
        throw new ParseException (location, message, inner);
      else
        throw new ParseException (location, String.Format (message, parms), inner);
    }

    internal void ThrowParseFileNotFound (string path, params object[] parms)
    {
      ThrowParseException ("The file '" + path + "' does not exist", parms);
    }
    
    internal ILocation Location {
      get { return location; }
      set { location = value; }
    }

    internal HttpContext Context {
      get { return context; }
      set { context = value; }
    }

    internal string BaseDir {
      get {
        if (baseDir == null)
          baseDir = MapPath (BaseVirtualDir, false);

        return baseDir;
      }
    }

    internal virtual string BaseVirtualDir {
      get {
        if (baseVDir == null)
          baseVDir = VirtualPathUtility.GetDirectory (context.Request.FilePath);
        
        return baseVDir;
      }

      set {
        if (VirtualPathUtility.IsRooted (value))
          baseVDir = VirtualPathUtility.ToAbsolute (value);
        else
          baseVDir = value; 
      }
    }

    internal TSection GetConfigSection <TSection> (string section) where TSection: global::System.Configuration.ConfigurationSection
    {
      VirtualPath vpath = VirtualPath;
      string vp = vpath != null ? vpath.Absolute : null;
      if (vp == null)
        return WebConfigurationManager.GetSection (section) as TSection;
      else
        return WebConfigurationManager.GetSection (section, vp) as TSection;
    }
    
    internal VirtualPath VirtualPath {
      get;
      set;
    }

    internal CompilationSection CompilationConfig {
      get { return GetConfigSection <CompilationSection> ("system.web/compilation"); }
    }
  }
}