static void Echo(Instance instance, bool writeLog)
{
if (instance.MessageConnection.ConnectState != ConnectionState.Connected)
{
return;
}
// 验证一次请求
// string text = Guid.NewGuid().ToString();
string text = "!verify";
if (writeLog)
{
instance.WriteErrorLog("Begin echo: " + text);
}
try
{
string result = instance.MessageConnection.EchoTaskAsync(text, TimeSpan.FromSeconds(5), instance._cancel.Token).Result;
// 此用法在 dp2mserver 不存在 echo() API 的时候会挂起当前线程
// string result = instance.MessageConnection.echo(text).Result;
if (result == null)
{
result = "(timeout)";
}
if (writeLog)
{
instance.WriteErrorLog("End echo: " + result);
}
}
catch (Exception ex)
{
instance.WriteErrorLog("echo 出现异常: " + ExceptionUtil.GetExceptionText(ex));
{
string strErrorCode = "";
if (MessageConnection.IsHttpClientException(ex, out strErrorCode))
{
// echo 的时候有小概率可能会返回用户认证异常？重置连接
Task.Run(() => instance.TryResetConnection());
}
}
}
}
