mcs/class/System.ServiceModel.Web/System.ServiceModel.Channels/WebMessageEncoder.cs

   1 //
   2 // WebMessageEncoder.cs
   3 //
   4 // Author:
   5 //      Atsushi Enomoto  <atsushi@ximian.com>
   6 //
   7 // Copyright (C) 2008 Novell, Inc (http://www.novell.com)
   8 //
   9 // Permission is hereby granted, free of charge, to any person obtaining
  10 // a copy of this software and associated documentation files (the
  11 // "Software"), to deal in the Software without restriction, including
  12 // without limitation the rights to use, copy, modify, merge, publish,
  13 // distribute, sublicense, and/or sell copies of the Software, and to
  14 // permit persons to whom the Software is furnished to do so, subject to
  15 // the following conditions:
  16 //
  17 // The above copyright notice and this permission notice shall be
  18 // included in all copies or substantial portions of the Software.
  19 //
  20 // THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND,
  21 // EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF
  22 // MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND
  23 // NONINFRINGEMENT. IN NO EVENT SHALL THE AUTHORS OR COPYRIGHT HOLDERS BE
  24 // LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN AN ACTION
  25 // OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN CONNECTION
  26 // WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE SOFTWARE.
  27 //
  28 using System;
  29 using System.IO;
  30 using System.Net.Mime;
  31 using System.Runtime.Serialization.Json;
  32 using System.ServiceModel;
  33 using System.ServiceModel.Dispatcher;
  34 using System.Text;
  35 using System.Xml;
  36
  37 namespace System.ServiceModel.Channels
  38 {
  39         internal class WebMessageEncoder : MessageEncoder
  40         {
  41                 internal const string ScriptPropertyName = "618BC2B0-38AA-21A3-DB4A-404FC87B9B11"; // randomly generated
  42
  43                 WebMessageEncodingBindingElement source;
  44
  45                 public WebMessageEncoder (WebMessageEncodingBindingElement source)
  46                 {
  47                         this.source = source;
  48                 }
  49
  50                 public override string ContentType {
  51 #if NET_2_1
  52                         get { return MediaType; }
  53 #else
  54                         get { return MediaType + "; charset=" + source.WriteEncoding.HeaderName; }
  55 #endif
  56                 }
  57
  58                 // FIXME: find out how it can be customized.
  59                 public override string MediaType {
  60                         get { return "application/xml"; }
  61                 }
  62
  63                 public override MessageVersion MessageVersion {
  64                         get { return MessageVersion.None; }
  65                 }
  66
  67                 public override Message ReadMessage (ArraySegment<byte> buffer, BufferManager bufferManager, string contentType)
  68                 {
  69                         throw new NotImplementedException ();
  70                 }
  71
  72                 public override Message ReadMessage (Stream stream, int maxSizeOfHeaders, string contentType)
  73                 {
  74                         if (stream == null)
  75                                 throw new ArgumentNullException ("stream");
  76
  77                         contentType = contentType ?? "application/octet-stream";
  78
  79                         Encoding enc = Encoding.UTF8;
  80                         ContentType ct = new ContentType (contentType);
  81                         if (ct.CharSet != null)
  82                                 enc = Encoding.GetEncoding (ct.CharSet);
  83
  84                         WebContentFormat fmt = WebContentFormat.Xml;
  85                         if (source.ContentTypeMapper != null)
  86                                 fmt = source.ContentTypeMapper.GetMessageFormatForContentType (contentType);
  87                         else {
  88                                 switch (ct.MediaType) {
  89                                 case "application/json":
  90                                         fmt = WebContentFormat.Json;
  91                                         break;
  92                                 case "application/xml":
  93                                         fmt = WebContentFormat.Xml;
  94                                         break;
  95                                 default:
  96                                         fmt = WebContentFormat.Raw;
  97                                         break;
  98                                 }
  99                         }
 100
 101                         Message msg = null;
 102                         WebBodyFormatMessageProperty wp = null;
 103                         switch (fmt) {
 104                         case WebContentFormat.Xml:
 105                                 // FIXME: is it safe/unsafe/required to keep XmlReader open?
 106                                 msg = Message.CreateMessage (MessageVersion.None, null, XmlReader.Create (new StreamReader (stream, enc)));
 107                                 wp = new WebBodyFormatMessageProperty (WebContentFormat.Xml);
 108                                 break;
 109                         case WebContentFormat.Json:
 110                                 // FIXME: is it safe/unsafe/required to keep XmlReader open?
 111 #if NET_2_1
 112                                 msg = Message.CreateMessage (MessageVersion.None, null, JsonReaderWriterFactory.CreateJsonReader (stream, source.ReaderQuotas));
 113 #else
 114                                 msg = Message.CreateMessage (MessageVersion.None, null, JsonReaderWriterFactory.CreateJsonReader (stream, enc, source.ReaderQuotas, null));
 115 #endif
 116                                 wp = new WebBodyFormatMessageProperty (WebContentFormat.Json);
 117                                 break;
 118                         case WebContentFormat.Raw:
 119                                 msg = new WebMessageFormatter.RawMessage (stream);
 120                                 wp = new WebBodyFormatMessageProperty (WebContentFormat.Raw);
 121                                 break;
 122                         default:
 123                                 throw new SystemException ("INTERNAL ERROR: cannot determine content format");
 124                         }
 125                         if (wp != null)
 126                                 msg.Properties.Add (WebBodyFormatMessageProperty.Name, wp);
 127                         return msg;
 128                 }
 129
 130                 WebContentFormat GetContentFormat (Message message)
 131                 {
 132                         string name = WebBodyFormatMessageProperty.Name;
 133                         if (message.Properties.ContainsKey (name))
 134                                 return ((WebBodyFormatMessageProperty) message.Properties [name]).Format;
 135
 136                         switch (MediaType) {
 137                         case "application/xml":
 138                         case "text/xml":
 139                                 return WebContentFormat.Xml;
 140                         case "application/json":
 141                         case "text/json":
 142                                 return WebContentFormat.Json;
 143                         case "application/octet-stream":
 144                                 return WebContentFormat.Raw;
 145                         default:
 146                                 return WebContentFormat.Default;
 147                         }
 148                 }
 149
 150                 public override void WriteMessage (Message message, Stream stream)
 151                 {
 152                         if (message == null)
 153                                 throw new ArgumentNullException ("message");
 154
 155                         // Handle /js and /jsdebug as the special cases.
 156                         var script = message.Properties [ScriptPropertyName] as string;
 157                         if (script != null) {
 158                                 var bytes = source.WriteEncoding.GetBytes (script);
 159                                 stream.Write (bytes, 0, bytes.Length);
 160                                 return;
 161                         }
 162
 163                         if (!MessageVersion.Equals (message.Version))
 164                                 throw new ProtocolException (String.Format ("MessageVersion {0} is not supported", message.Version));
 165                         if (stream == null)
 166                                 throw new ArgumentNullException ("stream");
 167
 168                         switch (GetContentFormat (message)) {
 169                         case WebContentFormat.Xml:
 170 #if NET_2_1
 171                                 using (XmlWriter w = XmlDictionaryWriter.CreateDictionaryWriter (XmlWriter.Create (new StreamWriter (stream, source.WriteEncoding))))
 172                                         message.WriteMessage (w);
 173 #else
 174                                 using (XmlWriter w = XmlDictionaryWriter.CreateTextWriter (stream, source.WriteEncoding))
 175                                         message.WriteMessage (w);
 176 #endif
 177                                 break;
 178                         case WebContentFormat.Json:
 179                                 using (XmlWriter w = JsonReaderWriterFactory.CreateJsonWriter (stream, source.WriteEncoding))
 180                                         message.WriteMessage (w);
 181                                 break;
 182                         case WebContentFormat.Raw:
 183                                 var rmsg = (WebMessageFormatter.RawMessage) message;
 184                                 var src = rmsg.Stream;
 185                                 if (src == null) // null output
 186                                         break;
 187
 188                                 int len = 0;
 189                                 byte [] buffer = new byte [4096];
 190                                 while ((len = src.Read (buffer, 0, buffer.Length)) > 0)
 191                                         stream.Write (buffer, 0, len);
 192                                 break;
 193                         case WebContentFormat.Default:
 194                                 throw new SystemException ("INTERNAL ERROR: cannot determine content format");
 195                         }
 196                 }
 197
 198                 public override ArraySegment<byte> WriteMessage (Message message, int maxMessageSize, BufferManager bufferManager,
 199                                                                  int messageOffset)
 200                 {
 201                         throw new NotImplementedException ();
 202                 }
 203         }
 204 }