feat: set a default TTL for the cache of static files

README.md

@@ -34,6 +34,7 @@ env CGO_ENABLED=0 go install -trimpath -ldflags="-s -w" github.com/RoyXiang/plex
      * Or, you can set it to [the official one](https://plaxt.astandke.com/)
    - `PLEX_TOKEN` (Optional, if you need it, see [here](https://support.plex.tv/articles/204059436-finding-an-authentication-token-x-plex-token/))
    - `STATIC_CACHE_SIZE` (Optional, the cache size of static files, e.g. CSS files, images, default: `1000`)
+   - `STATIC_CACHE_TTL` (Optional, the cache TTL of static files, default: `72h`)
    - `REDIRECT_WEB_APP` (Optional, default: `true`)
    - `DISABLE_TRANSCODE` (Optional, default: `true`)
    - `NO_REQUEST_LOGS` (Optional, default: `false`)

handler/main.go

@@ -21,6 +21,7 @@ func init() {
 		Token:            os.Getenv("PLEX_TOKEN"),
 		PlaxtUrl:         os.Getenv("PLAXT_URL"),
 		StaticCacheSize:  os.Getenv("STATIC_CACHE_SIZE"),
+		StaticCacheTtl:   os.Getenv("STATIC_CACHE_TTL"),
 		RedirectWebApp:   os.Getenv("REDIRECT_WEB_APP"),
 		DisableTranscode: os.Getenv("DISABLE_TRANSCODE"),
 		NoRequestLogs:    os.Getenv("NO_REQUEST_LOGS"),

handler/plex.go

@@ -25,6 +25,7 @@ type PlexConfig struct {
 	Token            string
 	PlaxtUrl         string
 	StaticCacheSize  string
+	StaticCacheTtl   string
 	RedirectWebApp   string
 	DisableTranscode string
 	NoRequestLogs    string
@@ -77,12 +78,17 @@ func NewPlexClient(config PlexConfig) *PlexClient {
 		plaxtUrl = u.String()
 	}
 
-	var staticCache gcache.Cache
-	if config.StaticCacheSize == "" {
-		staticCache = gcache.New(1000).LFU().Build()
-	} else if staticCacheSize, err := strconv.Atoi(config.StaticCacheSize); err == nil && staticCacheSize > 0 {
-		staticCache = gcache.New(staticCacheSize).LFU().Build()
+	var (
+		staticCacheSize int
+		staticCacheTtl  time.Duration
+	)
+	if staticCacheSize, err = strconv.Atoi(config.StaticCacheSize); err != nil || staticCacheSize <= 0 {
+		staticCacheSize = 1000
 	}
+	if staticCacheTtl, err = time.ParseDuration(config.StaticCacheTtl); err != nil {
+		staticCacheTtl = time.Hour * 24 * 3
+	}
+	staticCache := gcache.New(staticCacheSize).LFU().Expiration(staticCacheTtl).Build()
 	dynamicCache := gcache.New(100).LRU().Expiration(time.Second).Build()
 
 	var redirectWebApp, disableTranscode, noRequestLogs bool