mcs/class/Mono.Http/Mono.Http/GZipWebResponse.cs

   1 //
   2 // Mono.Http.GZipHttpWebResponse
   3 //
   4 // Authors:
   5 //      Gonzalo Paniagua Javier (gonzalo@ximian.com)
   6 //
   7 // (c) 2003 Ximian, Inc. (http://www.ximian.com)
   8 //
   9
  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;
  32 using System.IO;
  33 using System.Runtime.Serialization;
  34 using ICSharpCode.SharpZipLib.GZip;
  35
  36 namespace System.Net
  37 {
  38         [Serializable]
  39         public class GZipWebResponse : WebResponse, ISerializable, IDisposable
  40         {
  41                 WebResponse response;
  42                 bool compressed;
  43                 [NonSerialized] Stream stream;
  44                 [NonSerialized] long gzipLength;
  45
  46                 internal GZipWebResponse (WebResponse response, bool compressed)
  47                 {
  48                         this.response = response;
  49                         this.compressed = compressed;
  50                 }
  51
  52                 protected GZipWebResponse (SerializationInfo info, StreamingContext context)
  53                 {
  54                         response = (WebResponse) info.GetValue ("response", typeof (WebResponse));
  55                         compressed = info.GetBoolean ("compressed");
  56                 }
  57
  58                 public override long ContentLength {
  59                         get {
  60                                 SetStream ();
  61                                 if (compressed)
  62                                         return gzipLength;
  63
  64                                 return response.ContentLength;
  65                         }
  66                 }
  67
  68                 public override string ContentType {
  69                         get { return response.ContentType; }
  70                 }
  71
  72                 public override WebHeaderCollection Headers {
  73                         get { return response.Headers; }
  74                 }
  75
  76                 public override Uri ResponseUri {
  77                         get { return response.ResponseUri; }
  78                 }
  79
  80                 public WebResponse RealResponse {
  81                         get { return response; }
  82                 }
  83
  84                 public bool IsCompressed {
  85                         get { return compressed; }
  86                 }
  87
  88                 public override Stream GetResponseStream ()
  89                 {
  90                         SetStream ();
  91                         return stream;
  92                 }
  93
  94                 void SetStream ()
  95                 {
  96                         lock (this) {
  97                                 if (stream != null)
  98                                         return;
  99
 100                                 Stream st = response.GetResponseStream ();
 101                                 if (!compressed) {
 102                                         stream = st;
 103                                 } else {
 104                                         stream = new GZipInputStream (st);
 105                                         gzipLength = stream.Length;
 106                                 }
 107                         }
 108                 }
 109
 110                 void ISerializable.GetObjectData (SerializationInfo info, StreamingContext context)
 111                 {
 112                         info.AddValue ("response", response);
 113                         info.AddValue ("compressed", compressed);
 114                 }
 115
 116                 public override void Close ()
 117                 {
 118                         ((IDisposable) this).Dispose ();
 119                 }
 120
 121                 void IDisposable.Dispose ()
 122                 {
 123                         if (stream != null) {
 124                                 stream.Close ();
 125                                 stream = null;
 126                         }
 127
 128                         if (response != null) {
 129                                 response.Close ();
 130                                 response = null;
 131                         }
 132                 }
 133         }
 134 }
 135