[#446] Add support virtual-hosted-style

Signed-off-by: Roman Loginov <r.loginov@yadro.com>

cmd/s3-gw/app.go

@@ -105,9 +105,11 @@ type (
 		policyDenyByDefault           bool
 		sourceIPHeader                string
 		retryMaxAttempts              int
+		domains                       []string
+		vhsEnabled                    bool
+		vhsNamespacesEnabled          map[string]bool
 		retryMaxBackoff               time.Duration
 		retryStrategy                 handler.RetryStrategy
-		domains                       []string
 	}
 
 	maxClientsConfig struct {
@@ -256,13 +258,39 @@ func (s *appSettings) updateNamespacesSettings(v *viper.Viper, log *zap.Logger)
 	s.namespaces = nsConfig.Namespaces
 }
 
-func (s *appSettings) setVHSSettings(v *viper.Viper, _ *zap.Logger) {
-	domains := v.GetStringSlice(cfgListenDomains)
+func (s *appSettings) setVHSSettings(v *viper.Viper, log *zap.Logger) {
+	domains := fetchDomains(v, log)
+	vhsEnabled := v.GetBool(cfgVHSEnabled)
+	nsMap := fetchVHSNamespaces(v, log)
+	vhsNamespaces := make(map[string]bool, len(nsMap))
+	for ns, flag := range nsMap {
+		vhsNamespaces[s.ResolveNamespaceAlias(ns)] = flag
+	}
 
 	s.mu.Lock()
 	defer s.mu.Unlock()
 
 	s.domains = domains
+	s.vhsEnabled = vhsEnabled
+	s.vhsNamespacesEnabled = vhsNamespaces
+}
+
+func (s *appSettings) Domains() []string {
+	s.mu.RLock()
+	defer s.mu.RUnlock()
+	return s.domains
+}
+
+func (s *appSettings) GlobalVHS() bool {
+	s.mu.RLock()
+	defer s.mu.RUnlock()
+	return s.vhsEnabled
+}
+
+func (s *appSettings) VHSNamespacesEnabled() map[string]bool {
+	s.mu.RLock()
+	defer s.mu.RUnlock()
+	return s.vhsNamespacesEnabled
 }
 
 func (s *appSettings) BypassContentEncodingInChunks() bool {
@@ -467,12 +495,6 @@ func (s *appSettings) RetryStrategy() handler.RetryStrategy {
 	return s.retryStrategy
 }
 
-func (s *appSettings) Domains() []string {
-	s.mu.RLock()
-	defer s.mu.RUnlock()
-	return s.domains
-}
-
 func (a *App) initAPI(ctx context.Context) {
 	a.initLayer(ctx)
 	a.initHandler()
@@ -710,9 +732,6 @@ func (a *App) setHealthStatus() {
 
 // Serve runs HTTP server to handle S3 API requests.
 func (a *App) Serve(ctx context.Context) {
-	// Attach S3 API:
-	a.log.Info(logs.FetchDomainsPrepareToUseAPI, zap.Strings("domains", a.settings.Domains()))
-
 	cfg := api.Config{
 		Throttle: middleware.ThrottleOpts{
 			Limit:          a.settings.maxClient.count,
@@ -722,7 +741,6 @@ func (a *App) Serve(ctx context.Context) {
 		Center:  a.ctr,
 		Log:     a.log,
 		Metrics: a.metrics,
-		Domains: a.settings.Domains(),
 
 		MiddlewareSettings: a.settings,
 		PolicyChecker:      a.policyStorage,