52 lines
1.1 KiB
Go
52 lines
1.1 KiB
Go
package fshttp
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import (
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"fmt"
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"net/http"
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"github.com/prometheus/client_golang/prometheus"
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)
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// Metrics provide Transport HTTP level metrics.
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type Metrics struct {
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StatusCode *prometheus.CounterVec
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}
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// NewMetrics creates a new metrics instance, the instance shall be assigned to
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// DefaultMetrics before any processing takes place.
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func NewMetrics(namespace string) *Metrics {
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return &Metrics{
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StatusCode: prometheus.NewCounterVec(prometheus.CounterOpts{
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Namespace: namespace,
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Subsystem: "http",
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Name: "status_code",
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}, []string{"host", "method", "code"}),
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}
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}
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// DefaultMetrics specifies metrics used for new Transports.
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var DefaultMetrics = (*Metrics)(nil)
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// Collectors returns all prometheus metrics as collectors for registration.
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func (m *Metrics) Collectors() []prometheus.Collector {
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if m == nil {
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return nil
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}
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return []prometheus.Collector{
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m.StatusCode,
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}
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}
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func (m *Metrics) onResponse(req *http.Request, resp *http.Response) {
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if m == nil {
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return
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}
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var statusCode = 0
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if resp != nil {
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statusCode = resp.StatusCode
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}
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m.StatusCode.WithLabelValues(req.Host, req.Method, fmt.Sprint(statusCode)).Inc()
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}
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