private static Command ParseResponse(APIResponse response)
{
// Make sure there was a tag on the response
if (response.Tag == null)
{
Console.WriteLine($"No tag ({response})");
return(null);
}
// Find command using tag
Command command = CommandsWaitingForResponse[response.Tag];
// Don't need to proceed if this is the response to our KeepAlive ping
if (response.Tag == _keepAliveTag)
{
// TODO do NAT stuff here instead of where we sent this ping, since we have the port the API sees
AniDB.InvokeKeepAlivePong();
return(null);
}
if (command != null)
{
return(command);
}
// We should always have a command here, since we set a tag on every command we send
// Raise an error saying we're missing a command
AniDB.InvokeClientError(
new ClientErrorArgs($"Command is null; tag is probably not set on reply\nData: {response}")
);
return(null);
}
private static ICommandResult WaitForResponse(CommandTag tag)
{
int waitTime = 0;
while (CommandsWithResponse.ContainsKey(tag) == false)
{
if (waitTime > 20_000)
{
// Note: I *think* that this should fix itself it it encounters a race condition.
lock (rlLock) {
_timeOutsSinceLastResponse++;
if (_timeOutsSinceLastResponse > 5)
{
// we're probably rate limited
_rateLimited = true;
}
}
return(new CommandResult(ReturnCode.RequestTimedOut));
}
Thread.Sleep(50);
waitTime += 50;
}
lock (rlLock) {
_timeOutsSinceLastResponse = 0;
}
AniDB.InvokeCommandResultReceived(new CommandResultReceivedArgs());
tag.Release();
return(CommandsWithResponse[tag]);
}
public static Task <ICommandResult> QueueCommand(Command command)
{
if (Connected == false)
{
AniDB.InvokeClientError(
new ClientErrorArgs(
$"Connection must be initialized before queueing commands! {command.CommandBase}"));
}
CommandQueue.Enqueue(command);
return(Task.Run(() => WaitForResponse(command.Tag)));
}
private static void KeepConnectionAlive(DateTime lastCommandSentTime)
{
// Check if last command we sent was more than 5 minutes ago so we can keep connection alive (for NAT)
if (lastCommandSentTime < DateTime.Now.AddMinutes(-5) && lastCommandSentTime != DateTime.MinValue)
{
PingCommand pingCommand = new PingCommand();
bool parameterSet = pingCommand.SetOptionalParameter("nat", "1", out string error);
if (parameterSet == false)
{
AniDB.InvokeClientError(new ClientErrorArgs($"Setting parameter failed ({error})"));
return;
}
_keepAliveTag = pingCommand.Tag;
Task <ICommandResult> _ = pingCommand.Send();
AniDB.InvokeKeepAlivePing();
}
Thread.Sleep(150); // small timeout
}
private static void SendCommand(Command command)
{
if (ShouldSendCommand(command) == false)
{
return;
}
string commandString = $"{command.CommandBase} {command.GetParameters()}".Trim();
if (command.RequiresSession)
{
commandString += $"&{Session.SessionKey}";
}
// TEMP
Console.WriteLine("Sending data: " + commandString);
AniDB.InvokeCommandSent(new CommandSentArgs(command));
byte[] bytes = Encoding.ASCII.GetBytes(commandString);
_connection.Send(bytes, bytes.Length);
CommandsWaitingForResponse.Add(command.Tag, command);
}
