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//
// System.Net.WebConnectionStream
//
// Authors:
// Gonzalo Paniagua Javier (gonzalo@ximian.com)
// Martin Baulig <mabaul@microsoft.com>
//
// (C) 2003 Ximian, Inc (http://www.ximian.com)
// (C) 2004 Novell, Inc (http://www.novell.com)
// Copyright (c) 2017 Xamarin Inc. (http://www.xamarin.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.IO;
using System.Text;
using System.Threading;
using System.Threading.Tasks;
using System.Runtime.ExceptionServices;
using System.Net.Sockets;
namespace System.Net
{
abstract class WebConnectionStream : Stream
{
protected bool closed;
bool disposed;
object locker = new object ();
int read_timeout;
int write_timeout;
internal bool IgnoreIOErrors;
protected WebConnectionStream (WebConnection cnc, WebOperation operation)
{
Connection = cnc;
Operation = operation;
Request = operation.Request;
read_timeout = Request.ReadWriteTimeout;
write_timeout = read_timeout;
}
internal HttpWebRequest Request {
get;
}
internal WebConnection Connection {
get;
}
internal WebOperation Operation {
get;
}
internal ServicePoint ServicePoint => Connection.ServicePoint;
public override bool CanTimeout {
get { return true; }
}
public override int ReadTimeout {
get {
return read_timeout;
}
set {
if (value < -1)
throw new ArgumentOutOfRangeException ("value");
read_timeout = value;
}
}
public override int WriteTimeout {
get {
return write_timeout;
}
set {
if (value < -1)
throw new ArgumentOutOfRangeException ("value");
write_timeout = value;
}
}
protected Exception GetException (Exception e)
{
e = HttpWebRequest.FlattenException (e);
if (e is WebException)
return e;
if (Operation.Aborted || e is OperationCanceledException || e is ObjectDisposedException)
return HttpWebRequest.CreateRequestAbortedException ();
return e;
}
public override int Read (byte[] buffer, int offset, int count)
{
if (!CanRead)
throw new NotSupportedException (SR.net_writeonlystream);
Operation.ThrowIfClosedOrDisposed ();
if (buffer == null)
throw new ArgumentNullException (nameof (buffer));
int length = buffer.Length;
if (offset < 0 || length < offset)
throw new ArgumentOutOfRangeException (nameof (offset));
if (count < 0 || (length - offset) < count)
throw new ArgumentOutOfRangeException (nameof (count));
try {
return ReadAsync (buffer, offset, count, CancellationToken.None).Result;
} catch (Exception e) {
throw GetException (e);
}
}
public override IAsyncResult BeginRead (byte[] buffer, int offset, int count,
AsyncCallback cb, object state)
{
if (!CanRead)
throw new NotSupportedException (SR.net_writeonlystream);
Operation.ThrowIfClosedOrDisposed ();
if (buffer == null)
throw new ArgumentNullException (nameof (buffer));
int length = buffer.Length;
if (offset < 0 || length < offset)
throw new ArgumentOutOfRangeException (nameof (offset));
if (count < 0 || (length - offset) < count)
throw new ArgumentOutOfRangeException (nameof (count));
var task = ReadAsync (buffer, offset, count, CancellationToken.None);
return TaskToApm.Begin (task, cb, state);
}
public override int EndRead (IAsyncResult r)
{
if (r == null)
throw new ArgumentNullException (nameof (r));
try {
return TaskToApm.End<int> (r);
} catch (Exception e) {
throw GetException (e);
}
}
public override IAsyncResult BeginWrite (byte[] buffer, int offset, int count,
AsyncCallback cb, object state)
{
if (buffer == null)
throw new ArgumentNullException (nameof (buffer));
int length = buffer.Length;
if (offset < 0 || length < offset)
throw new ArgumentOutOfRangeException (nameof (offset));
if (count < 0 || (length - offset) < count)
throw new ArgumentOutOfRangeException (nameof (count));
if (!CanWrite)
throw new NotSupportedException (SR.net_readonlystream);
Operation.ThrowIfClosedOrDisposed ();
var task = WriteAsync (buffer, offset, count, CancellationToken.None);
return TaskToApm.Begin (task, cb, state);
}
public override void EndWrite (IAsyncResult r)
{
if (r == null)
throw new ArgumentNullException (nameof (r));
try {
TaskToApm.End (r);
} catch (Exception e) {
throw GetException (e);
}
}
public override void Write (byte[] buffer, int offset, int count)
{
if (buffer == null)
throw new ArgumentNullException (nameof (buffer));
int length = buffer.Length;
if (offset < 0 || length < offset)
throw new ArgumentOutOfRangeException (nameof (offset));
if (count < 0 || (length - offset) < count)
throw new ArgumentOutOfRangeException (nameof (count));
if (!CanWrite)
throw new NotSupportedException (SR.net_readonlystream);
Operation.ThrowIfClosedOrDisposed ();
try {
WriteAsync (buffer, offset, count).Wait ();
} catch (Exception e) {
throw GetException (e);
}
}
public override void Flush ()
{
}
public override Task FlushAsync (CancellationToken cancellationToken)
{
return cancellationToken.IsCancellationRequested ?
Task.FromCancellation (cancellationToken) :
Task.CompletedTask;
}
internal void InternalClose ()
{
disposed = true;
}
protected abstract void Close_internal (ref bool disposed);
public override void Close ()
{
Close_internal (ref disposed);
}
public override long Seek (long a, SeekOrigin b)
{
throw new NotSupportedException (SR.net_noseek);
}
public override void SetLength (long a)
{
throw new NotSupportedException (SR.net_noseek);
}
public override bool CanSeek => false;
public override long Length => throw new NotSupportedException (SR.net_noseek);
public override long Position {
get { throw new NotSupportedException (SR.net_noseek); }
set { throw new NotSupportedException (SR.net_noseek); }
}
}
}