[#151] index page: Add browse via native protocol

Signed-off-by: Nikita Zinkevich <n.zinkevich@yadro.com>

cmd/http-gw/app.go

@@ -40,6 +40,7 @@ import (
 	"github.com/nspcc-dev/neo-go/pkg/crypto/keys"
 	"github.com/nspcc-dev/neo-go/pkg/util"
 	"github.com/nspcc-dev/neo-go/pkg/wallet"
+	"github.com/panjf2000/ants/v2"
 	"github.com/spf13/viper"
 	"github.com/valyala/fasthttp"
 	"go.opentelemetry.io/otel/trace"
@@ -89,6 +90,7 @@ type (
 	appSettings struct {
 		reconnectInterval time.Duration
 		dialerSource      *internalnet.DialerSource
+		workerPoolSize    int
 
 		mu                   sync.RWMutex
 		defaultTimestamp     bool
@@ -184,6 +186,7 @@ func (a *app) initAppSettings() {
 	a.settings = &appSettings{
 		reconnectInterval: fetchReconnectInterval(a.cfg),
 		dialerSource:      getDialerSource(a.log, a.cfg),
+		workerPoolSize:    a.cfg.GetInt(cfgWorkerPoolSize),
 	}
 	a.settings.update(a.cfg, a.log)
 }
@@ -490,7 +493,13 @@ func (a *app) setHealthStatus() {
 }
 
 func (a *app) Serve() {
-	handler := handler.New(a.AppParams(), a.settings, tree.NewTree(frostfs.NewPoolWrapper(a.treePool)))
+	workerPool := a.initWorkerPool()
+	defer func() {
+		workerPool.Release()
+		close(a.webDone)
+	}()
+
+	handler := handler.New(a.AppParams(), a.settings, tree.NewTree(frostfs.NewPoolWrapper(a.treePool)), workerPool)
 
 	// Configure router.
 	a.configureRouter(handler)
@@ -532,8 +541,14 @@ LOOP:
 	a.metrics.Shutdown()
 	a.stopServices()
 	a.shutdownTracing()
+}
 
-	close(a.webDone)
+func (a *app) initWorkerPool() *ants.Pool {
+	workerPool, err := ants.NewPool(a.settings.workerPoolSize)
+	if err != nil {
+		a.log.Fatal(logs.FailedToCreateWorkerPool, zap.Error(err))
+	}
+	return workerPool
 }
 
 func (a *app) shutdownTracing() {
@@ -609,6 +624,7 @@ func (a *app) stopServices() {
 		svc.ShutDown(ctx)
 	}
 }
+
 func (a *app) configureRouter(handler *handler.Handler) {
 	r := router.New()
 	r.RedirectTrailingSlash = true