private BoundingBox GetBoundingBoxFromRequest(StateVectorsRequestDto request)
{
if (request == null)
{
return(null);
}
if (request.LaMin.HasValue && request.LoMin.HasValue && request.LaMax.HasValue && request.LoMax.HasValue)
{
return(new BoundingBox
{
LaMin = request.LaMin.Value,
LoMin = request.LoMin.Value,
LaMax = request.LaMax.Value,
LoMax = request.LoMax.Value
});
}
return(null);
}
public async Task Get([FromQuery] StateVectorsRequestDto request, CancellationToken cancellationToken)
{
// Prepare some data for the OpenSkyClient request:
Credentials credentials = GetCredentials();
BoundingBox boundingBox = GetBoundingBoxFromRequest(request);
TimeSpan refreshInterval = GetRefreshInterval();
Response.Headers.Add("Content-Type", "text/event-stream");
Response.Headers.Add("Cache-Control", "no-cache");
while (!cancellationToken.IsCancellationRequested)
{
try
{
// Get the data for the given Request:
var data = await GetDataAsync(request.Time, request.Icao24, boundingBox, credentials, cancellationToken);
if (data == null)
{
logger.LogInformation("No Data received. See Error Logs for details. Skipping Event ...");
continue;
}
// Serialize as a Json String:
var dataAsJson = JsonSerializer.Serialize(data);
// Send the data as JSON over the wire:
await Response.WriteAsync($"data: {dataAsJson}\r\r", cancellationToken);
await Response.Body.FlushAsync(cancellationToken);
}
catch (Exception e)
{
logger.LogError(e, "Requesting Data failed");
}
await Task.Delay(refreshInterval);
}
}