public static ValueTask DisposeAsync(this ILocker locker)
{
if (locker is IAsyncDisposable asyncDisposable)
{
return(asyncDisposable.DisposeAsync());
}
locker.Dispose();
return(default);
/// <summary>
/// 通过网络中心执行操作，避免网络中断导致异常
/// </summary>
/// <param name="func"></param>
/// <typeparam name="T"></typeparam>
/// <returns></returns>
public T Execute <T>(Func <T> func)
{
if (!SupportAdsl)
{
return(func());
}
ILocker locker = null;
ILocker redialLocker = null;
try
{
redialLocker = _lockerFactory.GetLocker(RedialLocker);
locker = _lockerFactory.GetLocker();
redialLocker.Dispose();
return(func());
}
finally
{
redialLocker?.Dispose();
locker?.Dispose();
}
}
/// <summary>
/// 通过网络中心执行操作，避免网络中断导致异常
/// </summary>
/// <param name="action"></param>
public void Execute(Action action)
{
if (!SupportAdsl)
{
action();
}
else
{
ILocker locker = null;
ILocker redialLocker = null;
try
{
redialLocker = _lockerFactory.GetLocker(RedialLocker);
locker = _lockerFactory.GetLocker();
redialLocker.Dispose();
action();
}
finally
{
redialLocker?.Dispose();
locker?.Dispose();
}
}
}
/// <summary>
/// 进行拨号
/// </summary>
/// <exception cref="SpiderException"></exception>
public void Redial()
{
if (!_options.SupportAdsl)
{
throw new SpiderException("下载代理器不支持 ADSL 拨号");
}
ILocker locker = null;
try
{
locker = _lockerFactory.GetLocker(RedialLocker);
var interval = double.MaxValue;
if (DateTime.TryParse(locker.Information, out DateTime latestRedialTime))
{
interval = (DateTime.Now - latestRedialTime).TotalSeconds;
}
if (interval < _options.RedialIntervalLimit * 60)
{
_logger.LogInformation($"在间隔时间内 {_options.RedialIntervalLimit} 已经拨号");
}
else
{
WaitForAllSessionsExit();
bool success = false;
for (int i = 0; i < 10; ++i)
{
try
{
if (!_options.IgnoreRedialForTest)
{
_logger.LogInformation($"尝试拨号 [{i}]");
_redialer.Redial();
}
if (_options.IgnoreRedialForTest || _internetDetector.Detect())
{
_logger.LogInformation("拨号成功");
success = true;
break;
}
}
catch (Exception ex)
{
_logger.LogInformation($"拨号失败 [{i}]: {ex}");
}
}
if (!success)
{
throw new SpiderException("拨号失败");
}
}
}
finally
{
locker?.Dispose();
}
}
