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

//
// System.Web.HttpResponseHeader.cs 
//
// Author:
//  Chris Toshok (toshok@novell.com)
//

//
// Copyright (C) 2005-2009 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.Text;
using System.Web.Configuration;

namespace System.Web{
  abstract class BaseResponseHeader
  {
    string headerValue;
    
    public string Value {
      get { return headerValue; }
      set { headerValue = EncodeHeader (value); }
    }
    
    static bool headerCheckingEnabled;
    
    static BaseResponseHeader ()
    {
      HttpRuntimeSection section = WebConfigurationManager.GetWebApplicationSection ("system.web/httpRuntime") as HttpRuntimeSection;
      headerCheckingEnabled = section == null || section.EnableHeaderChecking;
    }


    internal BaseResponseHeader (string val)
    {
      Value = val;
    }

    string EncodeHeader (string value)
    {
      if (value == null || value.Length == 0)
        return value;
      
      if (headerCheckingEnabled) {
        StringBuilder ret = new StringBuilder ();
        int len = value.Length;

        for (int i = 0; i < len; i++) {
          switch (value [i]) {
            case '\r':
              ret.Append ("%0d");
              break;

            case '\n':
              ret.Append ("%0a");
              break;

            default:
              ret.Append (value [i]);
              break;
          }
        }

        return ret.ToString ();
      } else
        return value;
    }
    
    internal abstract void SendContent (HttpWorkerRequest wr);
  }

  internal sealed class KnownResponseHeader : BaseResponseHeader {
    public int ID;

    internal KnownResponseHeader (int ID, string val) : base (val)
    {
      this.ID = ID;
    }

    internal override void SendContent (HttpWorkerRequest wr)
    {
      wr.SendKnownResponseHeader (ID, Value);
    }
  }

  internal  class UnknownResponseHeader : BaseResponseHeader {
    public string Name;

    public UnknownResponseHeader (string name, string val) : base (val)
    {
      Name = name;
    }
  
    internal override void SendContent (HttpWorkerRequest wr)
    {
      wr.SendUnknownResponseHeader (Name, Value);
    }
    
  }
}