public async Task Invoke(HttpContext context, IBeatPulseService pulseService)
{
var request = context.Request;
if (!IsBeatPulseRequest(request, out string beatPulsePath))
{
await _next.Invoke(context);
return;
}
if (!await IsAuthenticatedRequest(context))
{
context.Response.StatusCode = StatusCodes.Status401Unauthorized;
return;
}
if (TryFromCache(beatPulsePath, out OutputLivenessMessage output))
{
await request.HttpContext
.Response
.WriteLivenessMessage(_options, output);
return;
}
output = new OutputLivenessMessage();
var responses = await pulseService.IsHealthy(beatPulsePath, _options, context);
if (!responses.Any())
{
// beat pulse path is not valid across any liveness
// return unavailable with not found reason.
output.SetNotFound();
}
else
{
// beat pulse is executed, set response
// messages and add to cache if is configured.
output.AddHealthCheckMessages(responses);
output.SetExecuted();
if (_options.CacheMode.UseServerMemory() && _options.CacheOutput)
{
_cache.TryAdd(beatPulsePath, output);
}
}
await request.HttpContext
.Response
.WriteLivenessMessage(_options, output);
}