private void ReadDataCallback(IAsyncResult asyncResult)
{
NetworkReadState state = ((NetworkReadState)asyncResult.AsyncState);
try
{
if (!state.DataStream.CanRead)
{
throw new IOException(String.Format(Messages.Exception_CouldNotReadFromStream, state.BytesLeft, 0));
}
int actualBytes = state.DataStream.EndRead(asyncResult);
if (actualBytes == 0)
{
throw new IOException(String.Format(Messages.Exception_CouldNotReadFromStream, state.BytesLeft, actualBytes));
}
state.BytesLeft -= actualBytes;
}
catch (Exception ex)
{
state.Exception = ex;
}
finally
{
_resetEvent.Set();
}
}
/// <summary>
/// Read requested bytes from response stream. The implementation will block until all requested bytes readed from source stream, or <see cref="TimeoutException"/> will be thrown.
/// </summary>
/// <param name="buffer">An array of type Byte that is the location in memory to store data read from the NetworkStream.</param>
/// <param name="length">Number of bytes to be read from the source stream.</param>
/// <exception cref="TimeoutException">Thrown when the time allotted for data read operation has expired.</exception>
public override int ReadBytes(byte[] buffer, int length)
{
ArgumentAssert.IsNotNull(buffer, "buffer");
ArgumentAssert.IsGreaterThan(length, 0, "length");
NetworkReadState state = new NetworkReadState();
state.DataStream = Stream;
state.BytesLeft = length;
_resetEvent = new ManualResetEvent(false);
while (state.BytesLeft > 0)
{
_resetEvent.Reset();
Stream.BeginRead(buffer, length - state.BytesLeft, state.BytesLeft, ReadDataCallback, state);
WaitForNetworkData();
if (state.Exception != null)
{
throw state.Exception;
}
}
return(length);
}
/// <summary>
/// Read requested bytes from response stream. The implementation will block until all requested bytes readed from source stream, or <see cref="TimeoutException"/> will be thrown.
/// </summary>
/// <param name="buffer">An array of type Byte that is the location in memory to store data read from the NetworkStream.</param>
/// <param name="length">Number of bytes to be read from the source stream.</param>
/// <exception cref="TimeoutException">Thrown when the time allotted for data read operation has expired.</exception>
public override int ReadBytes(byte[] buffer, int length)
{
ArgumentAssert.IsNotNull(buffer, "buffer");
ArgumentAssert.IsGreaterThan(length, 0, "length");
NetworkReadState state = new NetworkReadState();
state.DataStream = Stream;
state.BytesLeft = length;
_resetEvent = new ManualResetEvent(false);
while (state.BytesLeft > 0)
{
_resetEvent.Reset();
Stream.BeginRead(buffer, length - state.BytesLeft, state.BytesLeft, ReadDataCallback, state);
WaitForNetworkData();
}
return length;
}