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| Original file line number | Diff line number | Diff line change |
|---|---|---|
| @@ -0,0 +1,55 @@ | ||
| package middleware | ||
|
|
||
| import ( | ||
| "strconv" | ||
| "time" | ||
|
|
||
| "github.com/gin-gonic/gin" | ||
| "github.com/prometheus/client_golang/prometheus" | ||
| ) | ||
|
|
||
| var vangoghRegistry = prometheus.NewRegistry() | ||
|
|
||
| var ( | ||
| requestDuration = prometheus.NewHistogramVec( | ||
| prometheus.HistogramOpts{ | ||
| Name: "http_request_duration_milliseconds", | ||
| Help: "Duration of HTTP requests in milliseconds", | ||
| Buckets: []float64{50, 80, 100, 250, 500, 1000, 2000, 3000}, | ||
| }, | ||
| []string{"route", "status_code"}, | ||
| ) | ||
|
|
||
| requestsTotal = prometheus.NewCounterVec( | ||
| prometheus.CounterOpts{ | ||
| Name: "http_requests_total", | ||
| Help: "Total number of HTTP requests", | ||
| }, | ||
| []string{"route"}, | ||
| ) | ||
| ) | ||
|
|
||
| func init() { | ||
| vangoghRegistry.MustRegister(requestDuration) | ||
| vangoghRegistry.MustRegister(requestsTotal) | ||
| } | ||
|
|
||
| func MetricsMiddleware() gin.HandlerFunc { | ||
| return func(c *gin.Context) { | ||
| start := time.Now() | ||
| c.Next() | ||
|
|
||
| if c.Request.RequestURI != "/metrics" { | ||
| requestsTotal.WithLabelValues(c.Request.URL.Path).Inc() | ||
| } | ||
|
|
||
| if c.Request.Method == "POST" { | ||
| duration := time.Since(start).Milliseconds() | ||
| requestDuration.WithLabelValues(c.Request.URL.Path, strconv.Itoa(c.Writer.Status())).Observe(float64(duration)) | ||
| } | ||
| } | ||
| } | ||
|
|
||
| func GetCustomRegistry() *prometheus.Registry { | ||
| return vangoghRegistry | ||
| } |