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

//
// Mono.Http.GZipHttpWebResponse
//
// Authors:
//   Gonzalo Paniagua Javier (gonzalo@ximian.com)
//
// (c) 2003 Ximian, Inc. (http://www.ximian.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;
using System.IO;
using System.Runtime.Serialization;
using ICSharpCode.SharpZipLib.GZip;

namespace System.Net{
  [Serializable]
  public class GZipWebResponse : WebResponse, ISerializable, IDisposable
  {
    WebResponse response;
    bool compressed;
    [NonSerialized] Stream stream;
    [NonSerialized] long gzipLength;

    internal GZipWebResponse (WebResponse response, bool compressed)
    {
      this.response = response;
      this.compressed = compressed;
    }

    protected GZipWebResponse (SerializationInfo info, StreamingContext context)
    {
      response = (WebResponse) info.GetValue ("response", typeof (WebResponse));
      compressed = info.GetBoolean ("compressed");
    }
    
    public override long ContentLength {    
      get {
        SetStream ();
        if (compressed)
          return gzipLength;

        return response.ContentLength;
      }
    }
    
    public override string ContentType {
      get { return response.ContentType; }
    }
    
    public override WebHeaderCollection Headers {
      get { return response.Headers; }
    }
    
    public override Uri ResponseUri {    
      get { return response.ResponseUri; }
    }    
    
    public WebResponse RealResponse {
      get { return response; }
    }

    public bool IsCompressed {
      get { return compressed; }
    }

    public override Stream GetResponseStream ()
    {
      SetStream ();
      return stream;
    }
    
    void SetStream ()
    {
      lock (this) {
        if (stream != null)
          return;

        Stream st = response.GetResponseStream ();
        if (!compressed) {
          stream = st;
        } else {
          stream = new GZipInputStream (st);
          gzipLength = stream.Length;
        }
      }
    }

    void ISerializable.GetObjectData (SerializationInfo info, StreamingContext context)
    {
      info.AddValue ("response", response);
      info.AddValue ("compressed", compressed);
    }    

    public override void Close ()
    {
      ((IDisposable) this).Dispose ();
    }
    
    void IDisposable.Dispose ()
    {
      if (stream != null) {
        stream.Close ();
        stream = null;
      }

      if (response != null) {
        response.Close ();
        response = null;
      }
    }
  }  
}