sysops
9298216ce0
- PROJ-40: /api/health mit Version+Uptime, /metrics Prometheus-Format (mails_last_60min/24h/7d/30d, mails_total, storage_bytes, tenants_total, users_total, uptime_seconds) — Token-Schutz optional konfigurierbar - PROJ-41: GET /api/admin/stats/timeseries (30-Tage tagesgenau, Tenant-scoped) + SVG-Balkendiagramm im Dashboard (Mail-Eingang letzte 30 Tage) - storage.DBQueryRow() Helper für Metrics-Queries ohne Pool-Exposition - config.MetricsConfig (enabled, token) in config.go Co-Authored-By: Claude Sonnet 4.6 <noreply@anthropic.com>
93 lines
3.2 KiB
Go
93 lines
3.2 KiB
Go
package api
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import (
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"fmt"
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"net/http"
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"strings"
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"time"
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)
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// handleHealth returns a simple health check response.
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// GET /api/health (public, no auth)
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func (s *Server) handleHealth(w http.ResponseWriter, r *http.Request) {
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writeJSON(w, http.StatusOK, map[string]interface{}{
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"status": "ok",
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"version": s.appVersion,
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"uptime_sec": int64(time.Since(s.startTime).Seconds()),
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})
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}
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// handleMetrics serves Prometheus-compatible metrics.
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// GET /metrics (public or token-protected)
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//
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// Metrics are DB-backed gauges; no in-process counters needed.
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// Format: https://prometheus.io/docs/instrumenting/exposition_formats/
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func (s *Server) handleMetrics(w http.ResponseWriter, r *http.Request) {
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if !s.metricsCfg.Enabled {
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writeError(w, http.StatusNotFound, "metrics disabled")
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return
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}
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// Optional token protection
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if s.metricsCfg.Token != "" {
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tok := extractBearerToken(r)
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if tok == "" {
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// Also accept ?token= query param for scraper convenience
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tok = r.URL.Query().Get("token")
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}
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if tok != s.metricsCfg.Token {
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w.Header().Set("WWW-Authenticate", `Bearer realm="archivmail metrics"`)
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writeError(w, http.StatusUnauthorized, "invalid metrics token")
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return
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}
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}
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ctx := r.Context()
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var sb strings.Builder
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metric := func(name, help, typ string, val interface{}) {
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fmt.Fprintf(&sb, "# HELP %s %s\n", name, help)
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fmt.Fprintf(&sb, "# TYPE %s %s\n", name, typ)
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fmt.Fprintf(&sb, "%s %v\n", name, val)
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}
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// ── Mail counts ───────────────────────────────────────────────────────
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activity, _ := s.store.MailActivityStats(ctx)
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if activity != nil {
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metric("archivmail_mails_last_60min", "Mails received in the last 60 minutes", "gauge", activity.Last60Min)
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metric("archivmail_mails_last_24h", "Mails received in the last 24 hours", "gauge", activity.Last24h)
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metric("archivmail_mails_last_7d", "Mails received in the last 7 days", "gauge", activity.Last7d)
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metric("archivmail_mails_last_30d", "Mails received in the last 30 days", "gauge", activity.Last30d)
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}
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// Total mails + storage bytes from DB
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var totalMails int64
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var totalBytes int64
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if s.store != nil {
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_ = s.store.DBQueryRow(ctx,
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`SELECT COUNT(*), COALESCE(SUM(size_bytes),0) FROM emails`,
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).Scan(&totalMails, &totalBytes)
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}
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metric("archivmail_mails_total", "Total number of archived mails", "gauge", totalMails)
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metric("archivmail_storage_bytes", "Total size of archived mails in bytes", "gauge", totalBytes)
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// Tenant count
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var tenantCount int64
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if s.tenantStore != nil {
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_ = s.store.DBQueryRow(ctx, `SELECT COUNT(*) FROM tenants`).Scan(&tenantCount)
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}
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metric("archivmail_tenants_total", "Total number of tenants", "gauge", tenantCount)
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// User count
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var userCount int64
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_ = s.store.DBQueryRow(ctx, `SELECT COUNT(*) FROM users WHERE active = true`).Scan(&userCount)
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metric("archivmail_users_total", "Total number of active users", "gauge", userCount)
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// Process uptime
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metric("archivmail_uptime_seconds", "Process uptime in seconds", "gauge", int64(time.Since(s.startTime).Seconds()))
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w.Header().Set("Content-Type", "text/plain; version=0.0.4; charset=utf-8")
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w.WriteHeader(http.StatusOK)
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w.Write([]byte(sb.String())) //nolint:errcheck
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}
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