add configurable static file caching with defaults

- added MaxAge and CacheDuration fields to server configuration
- implemented default values (0 for max-age, 10s for cache duration)
- integrated caching parameters with fiber's static file handling
- applied caching settings to all registered static routes

Author: Luca Buzzi

evo.config.go

@@ -36,6 +36,11 @@ var ProcessID int
 
 var DefaultPath = map[string][]string{}
 
+const (
+	defaultMaxAge        = 0
+	defaultCacheDuration = 10 * time.Second
+)
+
 type Configuration struct {
 	Log struct {
 		WriteFile bool   `yaml:"writefile"`
@@ -61,20 +66,22 @@ type Configuration struct {
 	} `yaml:"jwt"`
 
 	Server struct {
-		Host              string `yaml:"host"`
-		Port              string `yaml:"port"`
-		Cert              string `yaml:"cert"`
-		Key               string `yaml:"key"`
-		HTTPS             bool   `yaml:"https"`
-		Name              string `yaml:"name"`
-		MaxUploadSize     string `yaml:"max-upload-size"`
-		StrictRouting     bool   `yaml:"strict-routing"`
-		CaseSensitive     bool   `yaml:"case-sensitive"`
-		RequestID         bool   `yaml:"request-id"`
-		Debug             bool   `yaml:"debug"`
-		Recover           bool   `yaml:"recover"`
-		ProxyHeader       string `yaml:"proxy-header"`
-		ReduceMemoryUsage bool   `yaml:"reduce-memory-usage"`
+		Host              string        `yaml:"host"`
+		Port              string        `yaml:"port"`
+		Cert              string        `yaml:"cert"`
+		Key               string        `yaml:"key"`
+		HTTPS             bool          `yaml:"https"`
+		Name              string        `yaml:"name"`
+		MaxUploadSize     string        `yaml:"max-upload-size"`
+		StrictRouting     bool          `yaml:"strict-routing"`
+		CaseSensitive     bool          `yaml:"case-sensitive"`
+		RequestID         bool          `yaml:"request-id"`
+		Debug             bool          `yaml:"debug"`
+		Recover           bool          `yaml:"recover"`
+		ProxyHeader       string        `yaml:"proxy-header"`
+		ReduceMemoryUsage bool          `yaml:"reduce-memory-usage"`
+		MaxAge            int           `yaml:"static-max-age"`
+		CacheDuration     time.Duration `yaml:"static-cache-duration"`
 	} `yaml:"server"`
 
 	Database struct {

evo.go

@@ -129,9 +129,22 @@ func Run() {
 	}
 	parseArgs(false)
 
+	maxAge := config.Server.MaxAge
+	if maxAge <= 0 {
+		maxAge = defaultMaxAge
+	}
+
+	cacheDuration := config.Server.CacheDuration
+	if cacheDuration <= 0 {
+		cacheDuration = defaultCacheDuration
+	}
+
 	//Static Files
 	for _, item := range statics {
-		app.Static(item[0], item[1])
+		app.Static(item[0], item[1], fiber.Static{
+			MaxAge:        maxAge,
+			CacheDuration: cacheDuration,
+		})
 	}
 
 	for _, item := range onReady {