/// <summary>
/// Calculates how many bytes can be stored in the given message.
/// </summary>
/// <param name="message">The message in which the bytes will be stored.</param>
/// <returns>The number of bytes that can be stored until the message is too big to be sent.</returns>
public static int GetFreeByteElementCount(MessageIncomingMessageParts message)
{
message.Content = new byte[1];
var xmlText = MyAPIGateway.Utilities.SerializeToXML<MessageContainer>(new MessageContainer() { Content = message });
var oneEntry = System.Text.Encoding.Unicode.GetBytes(xmlText).Length;
message.Content = new byte[4];
xmlText = MyAPIGateway.Utilities.SerializeToXML<MessageContainer>(new MessageContainer() { Content = message });
var twoEntries = System.Text.Encoding.Unicode.GetBytes(xmlText).Length;
// we calculate the difference between one and two entries in the array to get the count of bytes that describe one entry
// we divide by 3 because 3 entries are stored in one block of the array
var difference = (double)(twoEntries - oneEntry) / 3d;
// get the size of the message without any entries
var freeBytes = MAX_MESSAGE_SIZE - oneEntry - Math.Ceiling(difference);
int count = (int)Math.Floor((double)freeBytes / difference);
// finally we test if the calculation was right
message.Content = new byte[count];
xmlText = MyAPIGateway.Utilities.SerializeToXML<MessageContainer>(new MessageContainer() { Content = message });
var finalLength = System.Text.Encoding.Unicode.GetBytes(xmlText).Length;
EconomyScript.Instance.ServerLogger.WriteVerbose(string.Format("FinalLength: {0}", finalLength));
if (MAX_MESSAGE_SIZE >= finalLength)
return count;
throw new Exception(string.Format("Calculation failed. OneEntry: {0}, TwoEntries: {1}, Difference: {2}, FreeBytes: {3}, Count: {4}, FinalLength: {5}", oneEntry, twoEntries, difference, freeBytes, count, finalLength));
}
private static void SendMessageParts(byte[] byteData, MessageSide side, ulong receiver = 0)
{
EconomyScript.Instance.ServerLogger.WriteVerbose("SendMessageParts {0} {1} {2}.", byteData.Length, side, receiver);
var byteList = byteData.ToList();
while (byteList.Count > 0)
{
// we create an empty message part
var messagePart = new MessageIncomingMessageParts()
{
Side = side,
SenderSteamId = side == MessageSide.ServerSide ? MyAPIGateway.Session.Player.SteamUserId : MyAPIGateway.Multiplayer.ServerId, // The 'side' indicates where it's going to, so the SenderId is the reverse of that.
SenderDisplayName = side == MessageSide.ServerSide ? MyAPIGateway.Session.Player.DisplayName : "",
SenderLanguage = side == MessageSide.ServerSide ? (int)MyAPIGateway.Session.Config.Language : 0,
LastPart = false,
};
try
{
// let's check how much we could store in the message
int freeBytes = GetFreeByteElementCount(messagePart);
int count = freeBytes;
// we check if that might be the last message
if (freeBytes > byteList.Count)
{
messagePart.LastPart = true;
// since we changed LastPart, we should make sure that we are still able to send all the stuff
if (GetFreeByteElementCount(messagePart) > byteList.Count)
{
count = byteList.Count;
}
else
throw new Exception("Failed to send message parts. The leftover could not be sent!");
}
// fill the message with content
messagePart.Content = byteList.GetRange(0, count).ToArray();
var xmlPart = MyAPIGateway.Utilities.SerializeToXML<MessageContainer>(new MessageContainer() { Content = messagePart });
var bytes = System.Text.Encoding.Unicode.GetBytes(xmlPart);
// and finally send the message
switch (side)
{
case MessageSide.ClientSide:
if (MyAPIGateway.Multiplayer.SendMessageTo(EconomyConsts.ConnectionId, bytes, receiver))
byteList.RemoveRange(0, count);
else
throw new Exception("Failed to send message parts to client.");
break;
case MessageSide.ServerSide:
if (MyAPIGateway.Multiplayer.SendMessageToServer(EconomyConsts.ConnectionId, bytes))
byteList.RemoveRange(0, count);
else
throw new Exception("Failed to send message parts to server.");
break;
}
}
catch (Exception ex)
{
EconomyScript.Instance.ServerLogger.WriteException(ex);
EconomyScript.Instance.ClientLogger.WriteException(ex);
return;
}
}
}