48 lines
1.2 KiB
Go
48 lines
1.2 KiB
Go
|
package api
|
||
|
|
|
||
|
|
import (
|
||
|
|
"net/http"
|
||
|
|
"strconv"
|
||
|
|
"time"
|
||
|
|
|
||
|
|
"github.com/fonu/fonu/internal/metrics"
|
||
|
|
)
|
||
|
|
|
||
|
|
type MetricsHandler struct {
|
||
|
|
store *metrics.Store
|
||
|
|
}
|
||
|
|
|
||
|
|
func NewMetricsHandler(store *metrics.Store) *MetricsHandler {
|
||
|
|
return &MetricsHandler{store: store}
|
||
|
|
}
|
||
|
|
|
||
|
|
// History 返回指标历史：窗口内的序列已按桶取平均，前端拿到就能直接画。
|
||
|
|
// hours 最多 30 天（＝保留期），buckets 最多 metrics.MaxBuckets。
|
||
|
|
func (h *MetricsHandler) History(w http.ResponseWriter, r *http.Request) {
|
||
|
|
hours := 24
|
||
|
|
if raw := r.URL.Query().Get("hours"); raw != "" {
|
||
|
|
if parsed, err := strconv.Atoi(raw); err == nil && parsed > 0 && parsed <= 24*30 {
|
||
|
|
hours = parsed
|
||
|
|
}
|
||
|
|
}
|
||
|
|
buckets := 48
|
||
|
|
if raw := r.URL.Query().Get("buckets"); raw != "" {
|
||
|
|
if parsed, err := strconv.Atoi(raw); err == nil && parsed > 0 {
|
||
|
|
buckets = parsed
|
||
|
|
}
|
||
|
|
}
|
||
|
|
if buckets > metrics.MaxBuckets {
|
||
|
|
buckets = metrics.MaxBuckets
|
||
|
|
}
|
||
|
|
series, err := h.store.Query(r.Context(), time.Duration(hours)*time.Hour, buckets)
|
||
|
|
if err != nil {
|
||
|
|
writeError(r, w, http.StatusInternalServerError, "读取指标历史失败", err)
|
||
|
|
return
|
||
|
|
}
|
||
|
|
writeJSON(w, http.StatusOK, map[string]any{
|
||
|
|
"hours": hours,
|
||
|
|
"buckets": buckets,
|
||
|
|
"series": series,
|
||
|
|
})
|
||
|
|
}
|