private void Stop()
{
try
{
lock (_internalLock)
{
CheckDisposed();
if (_state == State.Stopped)
{
return;
}
Log.ListenerStopping(Logger);
// If this instance registered URL prefixes then remove them before shutting down.
if (Options.RequestQueueMode == RequestQueueMode.Create || Options.RequestQueueMode == RequestQueueMode.CreateOrAttach)
{
Options.UrlPrefixes.UnregisterAllPrefixes();
UrlGroup.DetachFromQueue();
}
_state = State.Stopped;
}
}
catch (Exception exception)
{
Log.ListenerStopError(Logger, exception);
throw;
}
}
/// <summary>
/// Start accepting incoming requests.
/// </summary>
public void Start()
{
CheckDisposed();
Log.ListenerStarting(Logger);
// Make sure there are no race conditions between Start/Stop/Abort/Close/Dispose.
// Start needs to setup all resources. Abort/Stop must not interfere while Start is
// allocating those resources.
lock (_internalLock)
{
try
{
CheckDisposed();
if (_state == State.Started)
{
return;
}
// Always configure the UrlGroup if the intent was to create, only configure the queue if we actually created it
if (Options.RequestQueueMode == RequestQueueMode.Create || Options.RequestQueueMode == RequestQueueMode.CreateOrAttach)
{
Options.Apply(UrlGroup, _requestQueue.Created ? RequestQueue : null);
UrlGroup.AttachToQueue();
// All resources are set up correctly. Now add all prefixes.
try
{
Options.UrlPrefixes.RegisterAllPrefixes(UrlGroup);
}
catch (HttpSysException)
{
// If an error occurred while adding prefixes, free all resources allocated by previous steps.
UrlGroup.DetachFromQueue();
throw;
}
}
_state = State.Started;
}
catch (Exception exception)
{
// Make sure the HttpListener instance can't be used if Start() failed.
_state = State.Disposed;
DisposeInternal();
Log.ListenerStartError(Logger, exception);
throw;
}
}
}