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49 lines
1.3 KiB
Go
49 lines
1.3 KiB
Go
package handler
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import (
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"net/http"
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"strconv"
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"time"
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"github.com/tal-tech/go-zero/core/metric"
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"github.com/tal-tech/go-zero/core/timex"
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"github.com/tal-tech/go-zero/rest/internal/security"
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)
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const serverNamespace = "http_server"
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var (
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metricServerReqDur = metric.NewHistogramVec(&metric.HistogramVecOpts{
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Namespace: serverNamespace,
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Subsystem: "requests",
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Name: "duration_ms",
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Help: "http server requests duration(ms).",
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Labels: []string{"path"},
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Buckets: []float64{5, 10, 25, 50, 100, 250, 500, 1000},
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})
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metricServerReqCodeTotal = metric.NewCounterVec(&metric.CounterVecOpts{
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Namespace: serverNamespace,
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Subsystem: "requests",
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Name: "code_total",
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Help: "http server requests error count.",
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Labels: []string{"path", "code"},
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})
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)
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// PrometheusHandler returns a middleware that reports stats to prometheus.
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func PrometheusHandler(path string) func(http.Handler) http.Handler {
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return func(next http.Handler) http.Handler {
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return http.HandlerFunc(func(w http.ResponseWriter, r *http.Request) {
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startTime := timex.Now()
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cw := &security.WithCodeResponseWriter{Writer: w}
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defer func() {
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metricServerReqDur.Observe(int64(timex.Since(startTime)/time.Millisecond), path)
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metricServerReqCodeTotal.Inc(path, strconv.Itoa(cw.Code))
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}()
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next.ServeHTTP(cw, r)
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})
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}
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}
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