/// <summary>
/// Creates a byte array useful for transmission, without packaging the data.
/// </summary>
/// <returns>Byte array.</returns>
internal byte[] ToHeaderBytes(long contentLength)
{
SetHeaderFieldBitmap();
byte[] headerFieldsBytes = new byte[8];
headerFieldsBytes = BitArrayToBytes(HeaderFields);
headerFieldsBytes = ReverseByteArray(headerFieldsBytes);
byte[] ret = new byte[headerFieldsBytes.Length];
Buffer.BlockCopy(headerFieldsBytes, 0, ret, 0, headerFieldsBytes.Length);
#region Header-Fields
for (int i = 0; i < HeaderFields.Length; i++)
{
if (HeaderFields[i])
{
if (_Debug)
{
Console.WriteLine("Header field " + i + " is set");
}
MessageField field = GetMessageField(i);
switch (i)
{
case 0: // preshared key
if (_Debug)
{
Console.WriteLine("PresharedKey: " + Encoding.UTF8.GetString(PresharedKey));
}
ret = AppendBytes(ret, PresharedKey);
break;
case 1: // status
if (_Debug)
{
Console.WriteLine("Status: " + Status.ToString() + " " + (int)Status);
}
ret = AppendBytes(ret, IntegerToBytes((int)Status));
break;
default:
throw new ArgumentException("Unknown bit number.");
}
}
}
#endregion
#region Prepend-Message-Length
long finalLen = ret.Length + contentLength;
if (_Debug)
{
Console.WriteLine("Content length: " + finalLen + " (" + ret.Length + " + " + contentLength + ")");
}
byte[] lengthHeader = Encoding.UTF8.GetBytes(finalLen.ToString() + ":");
byte[] final = new byte[(lengthHeader.Length + ret.Length)];
Buffer.BlockCopy(lengthHeader, 0, final, 0, lengthHeader.Length);
Buffer.BlockCopy(ret, 0, final, lengthHeader.Length, ret.Length);
#endregion
if (_Debug)
{
Console.WriteLine("ToHeaderBytes returning: " + Encoding.UTF8.GetString(final));
}
return(final);
}
/// <summary>
/// Awaitable async method to build the Message object from data that awaits in a NetworkStream or SslStream, returning the stream itself.
/// </summary>
/// <returns>Always returns true (void cannot be a return parameter).</returns>
internal async Task <bool> BuildStream()
{
try
{
#region Read-Message-Length
using (MemoryStream msgLengthMs = new MemoryStream())
{
while (true)
{
byte[] data = await ReadFromNetwork(1, "MessageLength");
await msgLengthMs.WriteAsync(data, 0, 1);
if (data[0] == 58)
{
break;
}
}
byte[] msgLengthBytes = msgLengthMs.ToArray();
if (msgLengthBytes == null || msgLengthBytes.Length < 1)
{
return(false);
}
string msgLengthString = Encoding.UTF8.GetString(msgLengthBytes).Replace(":", "");
long length;
Int64.TryParse(msgLengthString, out length);
Length = length;
Log("Message payload length: " + Length + " bytes");
}
#endregion Read-Message-Length
#region Process-Header-Fields
byte[] headerFields = await ReadFromNetwork(8, "HeaderFields");
headerFields = ReverseByteArray(headerFields);
HeaderFields = new BitArray(headerFields);
long payloadLength = Length - 8;
for (int i = 0; i < HeaderFields.Length; i++)
{
if (HeaderFields[i])
{
MessageField field = GetMessageField(i);
Log("Reading header field " + i + " " + field.Name + " " + field.Type.ToString() + " " + field.Length + " bytes");
object val = await ReadField(field.Type, field.Length, field.Name);
SetMessageValue(field, val);
payloadLength -= field.Length;
}
}
if (MetadataLength > 0)
{
MetadataBytes = await ReadFromNetwork(MetadataLength, "MetadataBytes");
// payloadLength -= MetadataLength;
Metadata = SerializationHelper.DeserializeJson <Dictionary <object, object> >(Encoding.UTF8.GetString(MetadataBytes));
}
ContentLength = payloadLength;
Data = null;
#endregion Process-Header-Fields
return(true);
}
catch (Exception e)
{
Log(Environment.NewLine +
"Message build from stream exception:" +
Environment.NewLine +
e.ToString() +
Environment.NewLine);
return(false);
}
}
/// <summary>
/// Awaitable async method to build the Message object from data that awaits in a NetworkStream or SslStream, returning the stream itself.
/// </summary>
/// <returns>Always returns true (void cannot be a return parameter).</returns>
internal async Task <bool> BuildStream()
{
try
{
#region Read-Message-Length
using (MemoryStream msgLengthMs = new MemoryStream())
{
while (true)
{
byte[] data = await ReadFromNetwork(1, "MessageLength");
await msgLengthMs.WriteAsync(data, 0, 1);
if (data[0] == 58)
{
break;
}
}
byte[] msgLengthBytes = msgLengthMs.ToArray();
if (msgLengthBytes == null || msgLengthBytes.Length < 1)
{
return(false);
}
string msgLengthString = Encoding.UTF8.GetString(msgLengthBytes).Replace(":", "");
long length;
Int64.TryParse(msgLengthString, out length);
Length = length;
if (_Debug)
{
Console.WriteLine("Message payload length: " + Length + " bytes");
}
}
#endregion
#region Process-Header-Fields
byte[] headerFields = await ReadFromNetwork(8, "HeaderFields");
headerFields = ReverseByteArray(headerFields);
HeaderFields = new BitArray(headerFields);
long payloadLength = Length - 8;
for (int i = 0; i < HeaderFields.Length; i++)
{
if (HeaderFields[i])
{
MessageField field = GetMessageField(i);
if (_Debug)
{
Console.WriteLine("Reading header field " + i + " " + field.Name + " " + field.Type.ToString() + " " + field.Length + " bytes");
}
object val = await ReadField(field.Type, field.Length, field.Name);
SetMessageValue(field, val);
payloadLength -= field.Length;
}
}
ContentLength = payloadLength;
Data = null;
if (_NetworkStream != null)
{
DataStream = _NetworkStream;
}
else if (_SslStream != null)
{
DataStream = _SslStream;
}
else
{
throw new IOException("No suitable input stream found.");
}
#endregion
return(true);
}
catch (Exception e)
{
if (_Debug)
{
Console.WriteLine(Common.SerializeJson(e));
}
throw e;
}
finally
{
if (_Debug)
{
Console.WriteLine("Message build completed:");
Console.WriteLine(this.ToString());
}
}
}
/// <summary>
/// Awaitable async method to build the Message object from data that awaits in a NetworkStream or SslStream.
/// </summary>
/// <returns>Always returns true (void cannot be a return parameter).</returns>
public async Task <bool> Build()
{
try
{
int read = 0;
int totalBytesRead = 0;
#region Read-Message-Length
using (MemoryStream msgLengthMs = new MemoryStream())
{
byte[] msgLengthBuffer = new byte[1];
if (_NetworkStream != null)
{
while ((read = await _NetworkStream.ReadAsync(msgLengthBuffer, 0, msgLengthBuffer.Length)) > 0)
{
await msgLengthMs.WriteAsync(msgLengthBuffer, 0, read);
// check if end of headers reached
if (msgLengthBuffer[0] == 58)
{
break;
}
}
}
else if (_SslStream != null)
{
while ((read = await _SslStream.ReadAsync(msgLengthBuffer, 0, msgLengthBuffer.Length)) > 0)
{
await msgLengthMs.WriteAsync(msgLengthBuffer, 0, read);
totalBytesRead += read;
// check if end of headers reached
if (msgLengthBuffer[0] == 58)
{
break;
}
}
}
else
{
throw new ArgumentException("Unknown stream type.");
}
byte[] msgLengthBytes = msgLengthMs.ToArray();
if (msgLengthBytes == null || msgLengthBytes.Length < 1)
{
return(false);
}
string msgLengthString = Encoding.UTF8.GetString(msgLengthBytes).Replace(":", "");
long length;
Int64.TryParse(msgLengthString, out length);
Length = length;
if (_Debug)
{
Console.WriteLine("Message payload length: " + Length + " bytes");
}
}
#endregion
#region Process-Header-Fields
byte[] headerFields = await ReadFromNetwork(8, "HeaderFields");
headerFields = ReverseByteArray(headerFields);
HeaderFields = new BitArray(headerFields);
long payloadBytes = Length - 8;
for (int i = 0; i < HeaderFields.Length; i++)
{
if (HeaderFields[i])
{
MessageField field = GetMessageField(i);
if (_Debug)
{
Console.WriteLine("Reading header field " + i + " " + field.Name + " " + field.Type.ToString() + " " + field.Length + " bytes");
}
object val = await ReadField(field.Type, field.Length, field.Name);
SetMessageValue(field, val);
payloadBytes -= field.Length;
}
}
Data = await ReadFromNetwork(payloadBytes, "Payload");
#endregion
return(true);
}
catch (Exception e)
{
if (_Debug)
{
Console.WriteLine("Message build exception: " + e.Message);
}
throw;
}
finally
{
if (_Debug)
{
Console.WriteLine("Message build completed");
}
}
}
