43 lines
2.0 KiB
Go
43 lines
2.0 KiB
Go
package app
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import (
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"fmt"
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"net/http"
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"sync/atomic"
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"time"
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)
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type metrics struct {
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startedAt time.Time
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requests atomic.Uint64
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badgeRenders atomic.Uint64
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validationRequests atomic.Uint64
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validationFailures atomic.Uint64
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panics atomic.Uint64
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}
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func newMetrics() *metrics { return &metrics{startedAt: time.Now()} }
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func (m *metrics) serveHTTP(w http.ResponseWriter, _ *http.Request) {
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w.Header().Set("Content-Type", "text/plain; version=0.0.4; charset=utf-8")
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w.Header().Set("Cache-Control", "no-store")
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fmt.Fprintf(w, "# HELP ai_disclosure_uptime_seconds Process uptime in seconds.\n")
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fmt.Fprintf(w, "# TYPE ai_disclosure_uptime_seconds gauge\n")
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fmt.Fprintf(w, "ai_disclosure_uptime_seconds %.0f\n", time.Since(m.startedAt).Seconds())
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fmt.Fprintf(w, "# HELP ai_disclosure_http_requests_total Total HTTP requests.\n")
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fmt.Fprintf(w, "# TYPE ai_disclosure_http_requests_total counter\n")
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fmt.Fprintf(w, "ai_disclosure_http_requests_total %d\n", m.requests.Load())
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fmt.Fprintf(w, "# HELP ai_disclosure_badge_renders_total Total rendered SVG badges.\n")
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fmt.Fprintf(w, "# TYPE ai_disclosure_badge_renders_total counter\n")
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fmt.Fprintf(w, "ai_disclosure_badge_renders_total %d\n", m.badgeRenders.Load())
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fmt.Fprintf(w, "# HELP ai_disclosure_validation_requests_total Total validation requests.\n")
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fmt.Fprintf(w, "# TYPE ai_disclosure_validation_requests_total counter\n")
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fmt.Fprintf(w, "ai_disclosure_validation_requests_total %d\n", m.validationRequests.Load())
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fmt.Fprintf(w, "# HELP ai_disclosure_validation_failures_total Failed validation requests.\n")
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fmt.Fprintf(w, "# TYPE ai_disclosure_validation_failures_total counter\n")
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fmt.Fprintf(w, "ai_disclosure_validation_failures_total %d\n", m.validationFailures.Load())
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fmt.Fprintf(w, "# HELP ai_disclosure_panics_total Recovered handler panics.\n")
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fmt.Fprintf(w, "# TYPE ai_disclosure_panics_total counter\n")
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fmt.Fprintf(w, "ai_disclosure_panics_total %d\n", m.panics.Load())
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}
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