public async Task Invoke(HttpContext context, IBeatPulseService pulseService)
{
var request = context.Request;
if (!IsBeatPulseRequest(request, out string beatPulsePath))
{
await _next.Invoke(context);
return;
}
else
{
if (TryFromCache(beatPulsePath, out OutputMessage output))
{
await WriteResponseAsync(request.HttpContext, output, _options.DetailedOutput);
}
else
{
output = new OutputMessage();
using (var cancellationTokenSource = new CancellationTokenSource())
{
var task = pulseService.IsHealthy(beatPulsePath, context, cancellationTokenSource.Token);
if (await Task.WhenAny(task, Task.Delay(_options.Timeout, cancellationTokenSource.Token)) == task)
{
var responses = await task;
if (!responses.Any())
{
await WriteNotFoundAsync(request.HttpContext, _options.DetailedOutput);
return;
}
output.AddHealthCheckMessages(responses);
output.EndAtUtc = DateTime.UtcNow;
if (_options.CacheMode.UseServerMemory() && _options.CacheOutput)
{
_cache.TryAdd(beatPulsePath, output);
}
await WriteResponseAsync(request.HttpContext, output, _options.DetailedOutput);
}
else
{
//timeout
_cache.TryRemove(beatPulsePath, out OutputMessage removed);
cancellationTokenSource.Cancel();
await WriteTimeoutAsync(request.HttpContext, _options.DetailedOutput);
}
}
}
}
}