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truewhile
80 lines
2.6 KiB
Go
80 lines
2.6 KiB
Go
package service
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import (
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"crypto/sha256"
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"encoding/hex"
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"sort"
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"strconv"
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"strings"
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)
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type embyItemsCacheValue struct {
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Items []map[string]any `json:"items"`
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TotalRecordCount int64 `json:"total_record_count"`
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StartIndex int `json:"start_index"`
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Artwork map[string]embyArtworkRef `json:"artwork,omitempty"`
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}
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type embyLatestCacheValue struct {
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Items []map[string]any `json:"items"`
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Artwork map[string]embyArtworkRef `json:"artwork,omitempty"`
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}
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type embyCountsCacheValue struct {
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MovieCount int64 `json:"movie_count"`
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SeriesCount int64 `json:"series_count"`
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EpisodeCount int64 `json:"episode_count"`
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ItemCount int64 `json:"item_count"`
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}
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func (e *EmbyService) embyItemsCacheKey(kind string, p ItemsParams) string {
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includeTypes := append([]string(nil), p.IncludeItemTypes...)
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filters := append([]string(nil), p.Filters...)
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ids := append([]string(nil), p.IDs...)
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sort.Strings(includeTypes)
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sort.Strings(filters)
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sort.Strings(ids)
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sum := sha256.Sum256([]byte(strings.Join([]string{
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kind,
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p.UserID,
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p.ParentID,
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strings.Join(ids, ","),
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p.SearchTerm,
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strings.Join(includeTypes, ","),
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strings.Join(filters, ","),
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strconv.FormatBool(p.Recursive),
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p.SortBy,
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p.SortOrder,
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strconv.Itoa(p.StartIndex),
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strconv.Itoa(p.Limit),
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}, "|")))
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return "media:emby:" + hex.EncodeToString(sum[:])
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}
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func (e *EmbyService) embyLatestCacheKey(userID, parentID string, limit int) string {
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// v2: payload tags for virtual artwork changed so clients drop cached placeholders.
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sum := sha256.Sum256([]byte(strings.Join([]string{"latest-v2", userID, parentID, strconv.Itoa(limit)}, "|")))
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return "media:emby:" + hex.EncodeToString(sum[:])
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}
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// defaultEmbyLatestCacheTTLSeconds 是 Emby「最新添加」缓存的兜底时长。
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const defaultEmbyLatestCacheTTLSeconds = 300
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// embyLatestCacheTTLSeconds 返回「最新添加」列表的缓存时长。它刻意比通用
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// 媒体缓存更长：客户端刷新首页时会同时请求全部媒体库的 Latest（生产环境
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// 观察到 73 个并发），缓存一旦集中过期，这批请求会同时穿透并各自重建
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// payload。延长后稳态下几乎全部命中缓存，冷启动频率也随之下降。
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func (e *EmbyService) embyLatestCacheTTLSeconds() int {
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if e == nil || e.cfg == nil || e.cfg.Cache.EmbyLatestTTLSeconds < 1 {
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return defaultEmbyLatestCacheTTLSeconds
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}
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return e.cfg.Cache.EmbyLatestTTLSeconds
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}
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func (e *EmbyService) mediaCacheTTLSeconds() int {
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if e == nil || e.cfg == nil || e.cfg.Cache.MediaTTLSeconds < 1 {
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return 90
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}
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return e.cfg.Cache.MediaTTLSeconds
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}
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