public async Task CheckUri(UriInfo uriInfo)
{
Uri uri;
UriEventArgs args;
UriStatus newStatus;
Exception error;
HttpStatusCode httpStatus;
uri = uriInfo.Uri;
if (!_settings.Statuses.TryGetValue(uri, out UriStatusInfo status))
{
status = new UriStatusInfo
{
LastChange = DateTimeOffset.UtcNow,
Status = UriStatus.Unknown,
Uri = uri
};
_settings.Statuses.Add(status);
}
args = new UriEventArgs(uri);
this.OnUriChecking(args);
(newStatus, httpStatus, error) = await this.GetUriStatus(uriInfo).ConfigureAwait(false);
if (error != null)
{
this.OnUriException(new UriExceptionEventArgs(uri, error));
}
this.UpdateStatus(status, httpStatus, newStatus);
this.OnUriChecked(args);
}
private void UpdateStatus(UriStatusInfo status, HttpStatusCode httpStatus, UriStatus newStatus)
{
UriStatus previousStatus;
previousStatus = status.Status;
if (newStatus == UriStatus.Unstable)
{
if (previousStatus == UriStatus.Offline ||
(previousStatus == UriStatus.Unstable && status.LastChange + _settings.UnstableInterval < DateTimeOffset.UtcNow))
{
newStatus = UriStatus.Offline;
}
}
if (newStatus != previousStatus)
{
status.LastChange = DateTimeOffset.UtcNow;
status.Status = newStatus;
status.HttpStatus = httpStatus;
this.OnUriStatusChanged(new UriStatusInfoEventArgs(status));
}
}
public UriStatusInfoEventArgs(UriStatusInfo statusInfo)
: base(statusInfo.Uri)
{
_statusInfo = statusInfo;
}