public static IApplicationBuilder UsePrometheusRequestDurations(this IApplicationBuilder app, Action <HttpRequestDurationsOptions> setupAction)
{
var options = new HttpRequestDurationsOptions();
setupAction?.Invoke(options);
return(app.UseMiddleware <HttpRequestDurationsMiddleware>(options));
}
public HttpRequestDurationsMiddleware(RequestDelegate next, HttpRequestDurationsOptions options)
{
_next = next;
_options = options;
var labels = new List <string>();
if (_options.IncludeStatusCode)
{
labels.Add("status_code");
}
if (_options.IncludeMethod)
{
labels.Add("method");
}
if (_options.IncludePath)
{
labels.Add("path");
}
_metricHelpText += string.Join(", ", labels);
_histogram = _options.CollectorRegistry == null
? Metrics.CreateHistogram(options.MetricName, _metricHelpText, labels.ToArray())
: Metrics.WithCustomRegistry(options.CollectorRegistry).CreateHistogram(options.MetricName, _metricHelpText, labels.ToArray());
}
/// <summary>
/// Metrics logging of request durations
/// </summary>
/// <param name="app">IApplicationBuilder</param>
/// <param name="setupOptions">Setup Options</param>
public static IApplicationBuilder UsePrometheusRequestDurations(this IApplicationBuilder app, Action <HttpRequestDurationsOptions> setupOptions)
{
var options = new HttpRequestDurationsOptions();
setupOptions?.Invoke(options);
options.CollectorRegistry
??= (ICollectorRegistry)app.ApplicationServices.GetService(typeof(ICollectorRegistry))
?? Metrics.DefaultCollectorRegistry;
return(app.UseMiddleware <HttpRequestDurationsMiddleware>(options));
}
public HttpRequestDurationsMiddleware(RequestDelegate next, HttpRequestDurationsOptions options)
{
_next = next;
_options = options;
var metricFactory = new MetricFactory(options.CollectorRegistry);
var labels = new List <string>();
if (_options.IncludeStatusCode)
{
labels.Add("status_code");
}
if (_options.IncludeMethod)
{
labels.Add("method");
}
#if HasRoutes
if (_options.IncludeController)
{
labels.Add("controller");
}
if (_options.IncludeAction)
{
labels.Add("action");
}
#endif
if (_options.IncludePath)
{
labels.Add("path");
}
if (_options.IncludeCustomLabels)
{
labels.AddRange(_options.CustomLabels.Select(customLabel => customLabel.Key));
}
_metricHelpText += string.Join(", ", labels);
_histogram = metricFactory.CreateHistogram(options.MetricName, _metricHelpText, options.IncludeTimestamp, options.Buckets, labels.ToArray());
}
