48 lines
1.2 KiB
Go
48 lines
1.2 KiB
Go
package api
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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/havline/havline/internal/metrics"
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)
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type MetricsHandler struct {
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store *metrics.Store
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}
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func NewMetricsHandler(store *metrics.Store) *MetricsHandler {
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return &MetricsHandler{store: store}
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}
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// 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。
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// hours 最多 30 天（＝保留期），buckets 最多 metrics.MaxBuckets。
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func (h *MetricsHandler) History(w http.ResponseWriter, r *http.Request) {
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hours := 24
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if raw := r.URL.Query().Get("hours"); raw != "" {
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if parsed, err := strconv.Atoi(raw); err == nil && parsed > 0 && parsed <= 24*30 {
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hours = parsed
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}
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}
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buckets := 48
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if raw := r.URL.Query().Get("buckets"); raw != "" {
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if parsed, err := strconv.Atoi(raw); err == nil && parsed > 0 {
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buckets = parsed
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}
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}
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if buckets > metrics.MaxBuckets {
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buckets = metrics.MaxBuckets
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}
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series, err := h.store.Query(r.Context(), time.Duration(hours)*time.Hour, buckets)
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if err != nil {
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writeError(r, w, http.StatusInternalServerError, "读取指标历史失败", err)
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return
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}
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writeJSON(w, http.StatusOK, map[string]any{
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"hours": hours,
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"buckets": buckets,
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"series": series,
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})
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}
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