Simple data controller for taking incoming sensor data.

DataController.cs

public class DataController : Controller
{
  private readonly SampleWriter sampleWriter;

  public DataController(SampleWriter sampleWriter)
  {
    this.sampleWriter = sampleWriter;
  }

  [HttpPost]
  public async Task<ActionResult> ProvideReading(uint milliseconds, double speed)
  {
    // sampleWriter is just a singleton dependency with an open file stream,
    // writing each record to a CSV file as it arrives.
    await sampleWriter.ProvideSample(milliseconds, speed);

    return StatusCode(200);
  }
}