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Process command prompt text on main thread (#1510)

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Fix possible threading issues when MCC commands interactively
This commit is contained in:
ORelio 2021-03-27 19:15:58 +01:00
parent 47c19466c3
commit 70d3b6175b
1 changed files with 60 additions and 40 deletions
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100
MinecraftClient/McClient.cs
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@ -26,7 +26,9 @@ namespace MinecraftClient
private static readonly List<string> cmd_names = new List<string>();
private static readonly Dictionary<string, Command> cmds = new Dictionary<string, Command>();
private readonly Dictionary<Guid, string> onlinePlayers = new Dictionary<Guid, string>();
private static bool CommandLoaded = false;
private static bool commandsLoaded = false;
private Queue<string> commandQueue = new Queue<string>();
private Queue<string> chatQueue = new Queue<string>();
private static DateTime nextMessageSendTime = DateTime.MinValue;
@ -289,58 +291,68 @@ namespace MinecraftClient
}
/// <summary>
/// Allows the user to send chat messages, commands, and to leave the server.
/// Allows the user to send chat messages, commands, and leave the server.
/// Enqueue text typed in the command prompt for processing on the main thread.
/// </summary>
private void CommandPrompt()
{
try
{
string text = "";
Thread.Sleep(500);
handler.SendRespawnPacket();
while (client.Client.Connected)
{
text = ConsoleIO.ReadLine();
if (ConsoleIO.BasicIO && text.Length > 0 && text[0] == (char)0x00)
string text = ConsoleIO.ReadLine();
lock (commandQueue)
{
//Process a request from the GUI
string[] command = text.Substring(1).Split((char)0x00);
switch (command[0].ToLower())
{
case "autocomplete":
if (command.Length > 1) { ConsoleIO.WriteLine((char)0x00 + "autocomplete" + (char)0x00 + handler.AutoComplete(command[1])); }
else Console.WriteLine((char)0x00 + "autocomplete" + (char)0x00);
break;
}
commandQueue.Enqueue(text);
}
else
{
text = text.Trim();
if (text.Length > 0)
{
if (Settings.internalCmdChar == ' ' || text[0] == Settings.internalCmdChar)
{
string response_msg = "";
string command = Settings.internalCmdChar == ' ' ? text : text.Substring(1);
if (!PerformInternalCommand(Settings.ExpandVars(command), ref response_msg) && Settings.internalCmdChar == '/')
{
SendText(text);
}
else if (response_msg.Length > 0)
{
Log.Info(response_msg);
}
}
else SendText(text);
}
}
}
}
}
catch (IOException) { }
catch (NullReferenceException) { }
}
/// <summary>
/// Allows the user to send chat messages, commands, and leave the server.
/// Process text from the MCC command prompt on the main thread.
/// </summary>
private void HandleCommandPromptText(string text)
{
if (ConsoleIO.BasicIO && text.Length > 0 && text[0] == (char)0x00)
{
//Process a request from the GUI
string[] command = text.Substring(1).Split((char)0x00);
switch (command[0].ToLower())
{
case "autocomplete":
if (command.Length > 1) { ConsoleIO.WriteLine((char)0x00 + "autocomplete" + (char)0x00 + handler.AutoComplete(command[1])); }
else Console.WriteLine((char)0x00 + "autocomplete" + (char)0x00);
break;
}
}
else
{
text = text.Trim();
if (text.Length > 0)
{
if (Settings.internalCmdChar == ' ' || text[0] == Settings.internalCmdChar)
{
string response_msg = "";
string command = Settings.internalCmdChar == ' ' ? text : text.Substring(1);
if (!PerformInternalCommand(Settings.ExpandVars(command), ref response_msg) && Settings.internalCmdChar == '/')
{
SendText(text);
}
else if (response_msg.Length > 0)
{
Log.Info(response_msg);
}
}
else SendText(text);
}
}
}
/// <summary>
/// Periodically checks for server keepalives and consider that connection has been lost if the last received keepalive is too old.
/// </summary>
@ -426,7 +438,7 @@ namespace MinecraftClient
{
/* Load commands from the 'Commands' namespace */
if (!CommandLoaded)
if (!commandsLoaded)
{
Type[] cmds_classes = Program.GetTypesInNamespace("MinecraftClient.Commands");
foreach (Type type in cmds_classes)
@ -447,7 +459,7 @@ namespace MinecraftClient
}
}
}
CommandLoaded = true;
commandsLoaded = true;
}
}
@ -560,6 +572,14 @@ namespace MinecraftClient
}
}
lock (commandQueue)
{
if (commandQueue.Count > 0)
{
HandleCommandPromptText(commandQueue.Dequeue());
}
}
lock (chatQueue)
{
if (chatQueue.Count > 0 && nextMessageSendTime < DateTime.Now)