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

//
// System.Net.FileWebResponse
//
// Author:
//   Lawrence Pit (loz@cable.a2000.nl)
//

//
// 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;

namespace System.Net{
  [Serializable]
  public class FileWebResponse : WebResponse, ISerializable, IDisposable
  {
    private Uri responseUri;
    private FileStream fileStream;
    private long contentLength;
    private WebHeaderCollection webHeaders;
    private bool disposed = false;
    
    // Constructors
    
    internal FileWebResponse (Uri responseUri, FileStream fileStream)
    {
      try {
        this.responseUri = responseUri;
        this.fileStream = fileStream;
        this.contentLength = fileStream.Length;
        this.webHeaders = new WebHeaderCollection ();
        this.webHeaders.Add ("Content-Length", Convert.ToString (contentLength));
        this.webHeaders.Add ("Content-Type", "application/octet-stream");
      } catch (Exception e) {
        throw new WebException (e.Message, e);
      }
    }
    
#if NET_2_0
    [Obsolete ("Serialization is obsoleted for this type", false)]
#endif
    protected FileWebResponse (SerializationInfo serializationInfo, StreamingContext streamingContext)
    {
      SerializationInfo info = serializationInfo;

      responseUri = (Uri) info.GetValue ("responseUri", typeof (Uri));
      contentLength = info.GetInt64 ("contentLength");
      webHeaders = (WebHeaderCollection) info.GetValue ("webHeaders", typeof (WebHeaderCollection));
    }
    
    // Properties
    
    public override long ContentLength {
      get {
        CheckDisposed ();
        return this.contentLength;
      }
    }
    
    public override string ContentType {
      get {
        CheckDisposed ();
        return "application/octet-stream";
      }
    }
    
    public override WebHeaderCollection Headers {
      get {
        CheckDisposed ();
        return this.webHeaders;
      }
    }
    
    public override Uri ResponseUri {
      get {
        CheckDisposed ();
        return this.responseUri;
      }
    }

    // Methods

    void ISerializable.GetObjectData (SerializationInfo serializationInfo, StreamingContext streamingContext)
    {
      GetObjectData (serializationInfo, streamingContext);
    }

#if NET_2_0
    protected override
#endif
    void GetObjectData (SerializationInfo serializationInfo, StreamingContext streamingContext)
    {
      SerializationInfo info = serializationInfo;

      info.AddValue ("responseUri", responseUri, typeof (Uri));
      info.AddValue ("contentLength", contentLength);
      info.AddValue ("webHeaders", webHeaders, typeof (WebHeaderCollection));
    }

    public override Stream GetResponseStream()
    {
      CheckDisposed ();
      return this.fileStream;
    }
        
    // Cleaning up stuff
    
    ~FileWebResponse ()
    {
      Dispose (false);
    }    
    
    public override void Close()
    {
      ((IDisposable) this).Dispose ();
    }

#if TARGET_JVM //enable overrides for extenders
    public override void Dispose()
#else
    void IDisposable.Dispose()
#endif
    {
      Dispose (true);
      
      // see spec, suppress finalization of this object.
      GC.SuppressFinalize (this);  
    }
    
#if !NET_2_0
    protected virtual
#endif
    void Dispose (bool disposing)
    {
      if (this.disposed)
        return;
      this.disposed = true;
      
      if (disposing) {
        // release managed resources
        this.responseUri = null;
        this.webHeaders = null;
      }
      
      // release unmanaged resources
      FileStream stream = fileStream;
      fileStream = null;
      if (stream != null)
        stream.Close (); // also closes webRequest
    }
    
    private void CheckDisposed ()
    {
      if (disposed)
        throw new ObjectDisposedException (GetType ().FullName);
    }    
  }
}