public override void ExecuteCommand(ChatSession session, StringRequestInfo requestInfo)
{
var result = new MsgInfo(MsgType.JOIN_RESULT);
var frame = MsgFrame.Parse(requestInfo.Body);
var msg = MsgInfo.FromFrame(new[] { frame });
var username = msg.FromUser;
// 用户未输入昵称
if (string.IsNullOrWhiteSpace(username))
{
result.Success = false;
result.Message = "Please enter your Nickname.";
MsgUtil.Send(session, result);
return;
}
var sessions = session.AppServer.GetSessions(_ => !string.IsNullOrWhiteSpace(_.UserName)).ToList();
// 昵称已经存在
if (sessions.Any(_ => _.UserName.Equals(username, StringComparison.OrdinalIgnoreCase)))
{
result.Success = false;
result.Message = "Nickname [" + username + "] exists, please get another one.";
MsgUtil.Send(session, result);
return;
}
// 昵称不存在，可以加入聊天
session.UserName = username;
// 返回当前的用户列表
var users = sessions.Where(sess => sess.SessionID != session.SessionID)
.Select(sess => sess.UserName);
result.Data = string.Join(",", users).ToBin();
MsgUtil.Send(session, result);
// 通知其它用户
MsgUtil.SendAll(session, new MsgInfo(MsgType.NEW_JOIN)
{
FromUser = session.UserName
});
}
private void client_DataReceived(object sender, DataEventArgs e)
{
// 这里要注意：
// e.Length 是实际数据的长度
// 如果直接使用 Encoding.UTF8.GetString(e.Data)
// 会读取到填充的\0字符，这会引起不可预知的意外
var data = buffer + Encoding.UTF8.GetString(e.Data, 0, e.Length);
buffer.Clear();
var temp = data.Split(new[] { "\r\n" }, StringSplitOptions.RemoveEmptyEntries);
switch (temp.Length)
{
case 0:
return;
case 1:
data = temp[0];
break;
default:
data = temp[0];
buffer.Append(temp[1]);
break;
}
var frame = MsgFrame.Parse(data);
if (Cache.Check(frame))
{
return;
}
var msg = MsgInfo.FromFrame(Cache.Get(frame.Id));
switch (msg.Type)
{
case MsgType.JOIN_RESULT: // 加入结果
// 加入成功
if (msg.Success)
{
// 更新标题
Text = "Client - " + tName.Text;
if (msg.Data != null && msg.Data.Length != 0)
{
list.Items.Clear();
var onlineusers = msg.Data.ToStr().Split(",".ToArray());
foreach (var item in onlineusers)
{
AddUser(item);
}
}
AppendNotify("U can enjoy the chat now");
}
else
{
client.Close();
bConnect.Text = "Connect";
AppendNotify(msg.Message);
}
break;
case MsgType.NEW_JOIN: // 有新用户加入
AppendNotify(string.Format("User {0} join", msg.FromUser));
AddUser(msg.FromUser);
break;
case MsgType.SEND_RESULT: // 发送消息结果
if (!msg.Success)
{
AppendNotify(msg.Message);
}
break;
case MsgType.MSG: // 收到消息
AppendMsg(msg, false);
break;
case MsgType.QUIT: // 用户退出
AppendNotify(string.Format("User {0} leave", msg.FromUser));
RemoveUser(msg.FromUser);
break;
}
}