public async Task Invoke(HttpContext context)
{
// TODO: Use pathstrings instead?
string route = context.Request.Path.ToString().ToLower();
if (_options.IgnoreRoutesStartWith != null && _options.IgnoreRoutesStartWith.Any(i => route.StartsWith(i)))
{
await _next.Invoke(context);
return;
}
if (_options.IgnoreRoutesContains != null && _options.IgnoreRoutesContains.Any(i => route.Contains(i)))
{
await _next.Invoke(context);
return;
}
if (_options.IgnoreRoutesConcrete != null && _options.IgnoreRoutesConcrete.Any(i => route == i))
{
await _next.Invoke(context);
return;
}
var watch = Stopwatch.StartNew();
await _next.Invoke(context);
watch.Stop();
var labelValues = new string[_labelsCount];
var index = 0;
if (_options.IncludeStatusCode)
{
labelValues[index++] = context.Response.StatusCode.ToString();
}
if (_options.IncludeMethod)
{
labelValues[index++] = context.Request.Method;
}
if (_options.IncludePath)
{
labelValues[index++] = route;
}
if (_options.CustomLabels != null)
{
foreach (var customLabel in _options.CustomLabels)
{
labelValues[index++] = customLabel.Value;
}
}
_requestDurations.WithLabels(labelValues).Observe(watch.Elapsed.TotalSeconds);
}