mcs/class/System.Web/System.Web/HttpResponseHeader.cs

   1 //
   2 // System.Web.HttpResponseHeader.cs
   3 //
   4 // Author:
   5 //      Chris Toshok (toshok@novell.com)
   6 //
   7
   8 //
   9 // Copyright (C) 2005 Novell, Inc (http://www.novell.com)
  10 //
  11 // Permission is hereby granted, free of charge, to any person obtaining
  12 // a copy of this software and associated documentation files (the
  13 // "Software"), to deal in the Software without restriction, including
  14 // without limitation the rights to use, copy, modify, merge, publish,
  15 // distribute, sublicense, and/or sell copies of the Software, and to
  16 // permit persons to whom the Software is furnished to do so, subject to
  17 // the following conditions:
  18 //
  19 // The above copyright notice and this permission notice shall be
  20 // included in all copies or substantial portions of the Software.
  21 //
  22 // THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND,
  23 // EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF
  24 // MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND
  25 // NONINFRINGEMENT. IN NO EVENT SHALL THE AUTHORS OR COPYRIGHT HOLDERS BE
  26 // LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN AN ACTION
  27 // OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN CONNECTION
  28 // WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE SOFTWARE.
  29 //
  30
  31 using System.Collections;
  32 using System.Text;
  33 using System.Web.Configuration;
  34
  35 namespace System.Web {
  36
  37         internal abstract class BaseResponseHeader {
  38                 string headerValue;
  39
  40                 public string Value {
  41                         get { return headerValue; }
  42                         set { headerValue = EncodeHeader (value); }
  43                 }
  44
  45                 static bool headerCheckingEnabled;
  46
  47                 static BaseResponseHeader () {
  48 #if NET_2_0
  49                         HttpRuntimeSection section = WebConfigurationManager.GetWebApplicationSection ("system.web/httpRuntime") as HttpRuntimeSection;
  50 #else
  51                         HttpRuntimeConfig section = HttpContext.GetAppConfig ("system.web/httpRuntime") as HttpRuntimeConfig;
  52 #endif
  53                         headerCheckingEnabled = section == null || section.EnableHeaderChecking;
  54                 }
  55
  56
  57                 internal BaseResponseHeader (string val)
  58                 {
  59                         Value = val;
  60                 }
  61
  62                 string EncodeHeader (string value)
  63                 {
  64                         if (value == null || value.Length == 0)
  65                                 return value;
  66
  67                         if (headerCheckingEnabled) {
  68                                 StringBuilder ret = new StringBuilder ();
  69                                 int len = value.Length;
  70
  71                                 for (int i = 0; i < len; i++) {
  72                                         switch (value [i]) {
  73                                                 case '\r':
  74                                                         ret.Append ("%0d");
  75                                                         break;
  76
  77                                                 case '\n':
  78                                                         ret.Append ("%0a");
  79                                                         break;
  80
  81                                                 default:
  82                                                         ret.Append (value [i]);
  83                                                         break;
  84                                         }
  85                                 }
  86
  87                                 return ret.ToString ();
  88                         } else
  89                                 return value;
  90                 }
  91
  92                 internal abstract void SendContent (HttpWorkerRequest wr);
  93         }
  94
  95         internal sealed class KnownResponseHeader : BaseResponseHeader {
  96                 public int ID;
  97
  98                 internal KnownResponseHeader (int ID, string val) : base (val)
  99                 {
 100                         this.ID = ID;
 101                 }
 102
 103                 internal override void SendContent (HttpWorkerRequest wr)
 104                 {
 105                         wr.SendKnownResponseHeader (ID, Value);
 106                 }
 107         }
 108
 109         internal  class UnknownResponseHeader : BaseResponseHeader {
 110                 public string Name;
 111
 112                 public UnknownResponseHeader (string name, string val) : base (val)
 113                 {
 114                         Name = name;
 115                 }
 116
 117                 internal override void SendContent (HttpWorkerRequest wr)
 118                 {
 119                         wr.SendUnknownResponseHeader (Name, Value);
 120                 }
 121
 122         }
 123 }
 124