/// <summary>
/// Checks if this message is the only or final message in response to a request.
/// </summary>
/// <param name="header">The message header.</param>
/// <param name="version">The ETP version.</param>
/// <returns><c>true</c> if this is an acknowledge message with NoData set,
/// a protocol exception, or a different message type that is either the final
/// part of a multi-part message or not part of a multi-part message;
/// <c>false</c> otherwise.</returns>
public static bool IsFinalResponse(this IMessageHeader header, EtpVersion version)
{
if (!header.HasCorrelationId())
{
return(false);
}
if (version == EtpVersion.v11)
{
if (header.IsAcknowledge() && header.IsNoData())
{
return(true);
}
if (header.IsProtocolException())
{
return(true);
}
return(!header.IsMultiPart() || header.IsFinalPart());
}
else
{
return(header.IsFinalPart());
}
}
/// <summary>
/// Determines whether the message body and optional header extension can be compressed based on the specified header.
/// </summary>
/// <param name="header">The header.</param>
/// <returns><c>true</c> if the message body and optional header extension can be comressed; otherwise, <c>false</c>.</returns>
public static bool CanBeCompressed(this IMessageHeader header)
{
// Never compress RequestSession or OpenSession in Core protocol
if (header.Protocol == 0 && (header.IsRequestSession() || header.IsOpenSession()))
{
return(false);
}
// Don't compress Acknowledge or ProtocolException when sent by any protocol
if (header.IsAcknowledge() || header.IsProtocolException())
{
return(false);
}
return(true);
}
/// <summary>
/// Determines whether the message body can be compressed based on the specified header.
/// </summary>
/// <param name="header">The header.</param>
/// <param name="checkMessageFlags">A flag to check the message flags provided in the header.</param>
/// <returns><c>true</c> if the message body can be comressed; otherwise, <c>false</c>.</returns>
public static bool CanCompressMessageBody(this IMessageHeader header, bool checkMessageFlags = false)
{
// Never compress RequestSession or OpenSession in Core protocol
if (header.Protocol == 0 && (header.IsRequestSession() || header.IsOpenSession()))
{
return(false);
}
// Don't compress Acknowledge or ProtocolException when sent by any protocol
if (header.IsAcknowledge() || header.IsProtocolException())
{
return(false);
}
// Do the message flags indicate the body was compressed
return(!checkMessageFlags || header.HasFlag(MessageFlags.Compressed));
}
/// <summary>
/// Checks if this header is from an open session message.
/// </summary>
/// <param name="header">The message header.</param>
/// <returns><c>true</c> if the header is from an open session message; <c>false</c> otherwise.</returns>
public static bool IsAllowedBeforeSessionIsOpen(this IMessageHeader header)
{
return(header.IsRequestSession() || header.IsOpenSession() || header.IsAcknowledge() || header.IsProtocolException() || header.IsCloseSession());
}
