/// <summary>
/// Copies data from the stream to the buffer.
/// If the stream does not contain specified number of bytes, an exception will be thrown.
/// </summary>
/// <param name="inputStream">The source stream to copy data from.</param>
/// <param name="buffer">The buffer to copy data from.</param>
/// <param name="offset">The zero-based byte offset in a buffer at which to begin storing the data read from the current stream.</param>
/// <param name="sizeToRead">The size of the chunk being copied.</param>
public static void ReadDataFromStream(Stream inputStream, byte[] buffer, int offset, int sizeToRead)
{
if (sizeToRead <= 0)
{
return;
}
int readPortion = 0;
int readSize = inputStream.Read(buffer, offset, sizeToRead);
for ( ; readSize < sizeToRead; readSize += readPortion)
{
readPortion = inputStream.Read(buffer, offset + readSize, sizeToRead - readSize);
if (readPortion <= 0)
{
throw GenuineExceptions.Get_Receive_Portion();
}
}
}
/// <summary>
/// Synchronously reads the next network packet if it is available.
/// </summary>
/// <param name="deriveHeader">Indicates whether it is necessary to take header from the provided connection.</param>
private void ReadNextPortion(bool deriveHeader)
{
int bytesRead = 0;
int lengthToRead = 0;
if (!deriveHeader)
{
// try to read the remaining part of the packet
if (this._currentPacketBytesRead < this._currentPacketSize)
{
// read the next part of the packet
lengthToRead = Math.Min(this._currentPacketSize - this._currentPacketBytesRead, this._readBuffer.Length);
this._validLength = this.ReadFromSocket(this._readBuffer, 0, lengthToRead);
if (this._validLength == 0)
{
throw GenuineExceptions.Get_Receive_Portion();
}
// Fixed in 2.5.9.7
//this._tcpSocketInfo.ITransportContext.ConnectionManager.IncreaseBytesReceived(this._validLength);
this._currentPacketBytesRead += this._validLength;
this._currentPosition = 0;
if (this._currentPacketBytesRead == this._currentPacketSize && this._messageRead)
{
this.ReadingCompleted();
}
return;
}
// the underlying stream ends
if (this._messageRead)
{
return;
}
// prepare for reading a header
this._currentPosition = 0;
}
lengthToRead = TcpConnectionManager.HEADER_SIZE;
if (deriveHeader)
{
if (this._tcpSocketInfo.ReceivingBufferCurrentPosition > 0)
{
Buffer.BlockCopy(this._tcpSocketInfo.ReceivingHeaderBuffer, 0, this._readBuffer, 0, this._tcpSocketInfo.ReceivingBufferCurrentPosition);
}
this._currentPosition = this._tcpSocketInfo.ReceivingBufferCurrentPosition;
}
// read the header
while (this._currentPosition < lengthToRead)
{
bytesRead = this.ReadFromSocket(this._readBuffer, this._currentPosition, lengthToRead - this._currentPosition);
if (bytesRead == 0)
{
throw GenuineExceptions.Get_Receive_Portion();
}
// Fixed in 2.5.9.7
//this._tcpSocketInfo.ITransportContext.ConnectionManager.IncreaseBytesReceived(bytesRead);
this._currentPosition += bytesRead;
}
// parse the header
if (this._readBuffer[0] != MessageCoder.COMMAND_MAGIC_CODE)
{
throw GenuineExceptions.Get_Receive_IncorrectData();
}
this._currentPacketSize = MessageCoder.ReadInt32(this._readBuffer, 1);
this._messageRead = this._readBuffer[5] != 0;
this._currentPacketBytesRead = 0;
// and read the part of the packet
if (this._currentPacketBytesRead < this._currentPacketSize)
{
// read the next part of the packet
lengthToRead = Math.Min(this._currentPacketSize - this._currentPacketBytesRead, this._readBuffer.Length);
this._validLength = this.ReadFromSocket(this._readBuffer, 0, lengthToRead);
if (this._validLength == 0)
{
throw GenuineExceptions.Get_Receive_Portion();
}
// Fixed in 2.5.9.7
//this._tcpSocketInfo.ITransportContext.ConnectionManager.IncreaseBytesReceived(this._validLength);
this._currentPacketBytesRead += this._validLength;
this._currentPosition = 0;
}
if (this._currentPacketBytesRead == this._currentPacketSize && this._messageRead)
{
this.ReadingCompleted();
}
}
/// <summary>
/// Synchronously reads the next network packet if it is available.
/// </summary>
private void ReadNextPortion()
{
int bytesRead = 0;
int lengthToRead = 0;
// try to read the remaining part of the packet
if (this._currentPacketBytesRead < this._currentPacketSize)
{
// read the next part of the packet
lengthToRead = Math.Min(this._currentPacketSize - this._currentPacketBytesRead, this._readBuffer.Length);
this._validLength = this._underlyingStream.Read(this._readBuffer, 0, lengthToRead);
if (this._validLength == 0)
{
throw GenuineExceptions.Get_Receive_Portion();
}
this.ITransportContext.ConnectionManager.IncreaseBytesReceived(this._validLength);
this._currentPacketBytesRead += this._validLength;
this._currentPosition = 0;
return;
}
// the underlying stream ends
if (this._messageRead)
{
return;
}
// prepare for reading a header
lengthToRead = MessageCoder.LABEL_HEADER_SIZE;
this._currentPosition = 0;
// read the header
while (this._currentPosition < lengthToRead)
{
bytesRead = this._underlyingStream.Read(this._readBuffer, this._currentPosition, lengthToRead - this._currentPosition);
if (bytesRead == 0)
{
throw GenuineExceptions.Get_Receive_Portion();
}
this.ITransportContext.ConnectionManager.IncreaseBytesReceived(bytesRead);
this._currentPosition += bytesRead;
}
// parse the header
if (this._readBuffer[0] != MessageCoder.COMMAND_MAGIC_CODE)
{
throw GenuineExceptions.Get_Receive_IncorrectData();
}
this._currentPacketSize = MessageCoder.ReadInt32(this._readBuffer, 1);
this._messageRead = this._readBuffer[5] != 0;
this._currentPacketBytesRead = 0;
// and read the part of the packet
if (this._currentPacketBytesRead < this._currentPacketSize)
{
// read the next part of the packet
lengthToRead = Math.Min(this._currentPacketSize - this._currentPacketBytesRead, this._readBuffer.Length);
// GenuineUtility.ReadDataFromStream(this._underlyingStream, this._readBuffer, 0, lengthToRead);
// this._validLength = lengthToRead;
this._validLength = this._underlyingStream.Read(this._readBuffer, 0, lengthToRead);
if (this._validLength == 0)
{
throw GenuineExceptions.Get_Receive_Portion();
}
this.ITransportContext.ConnectionManager.IncreaseBytesReceived(this._validLength);
this._currentPacketBytesRead += this._validLength;
this._currentPosition = 0;
}
}