Migrate to CDN SDK

app.go

@@ -3,33 +3,39 @@ package main
 import (
 	"context"
 	"crypto/ecdsa"
-	"errors"
+	"crypto/elliptic"
+	"crypto/rand"
+	"strconv"
 	"time"
 
 	"github.com/fasthttp/router"
+	sdk "github.com/nspcc-dev/cdn-neofs-sdk"
+	"github.com/nspcc-dev/cdn-neofs-sdk/creds/neofs"
+	"github.com/nspcc-dev/cdn-neofs-sdk/logger"
+	"github.com/nspcc-dev/cdn-neofs-sdk/pool"
+	crypto "github.com/nspcc-dev/neofs-crypto"
 	"github.com/spf13/viper"
 	"github.com/valyala/fasthttp"
 	"go.uber.org/zap"
+	"google.golang.org/grpc"
 	"google.golang.org/grpc/grpclog"
+	"google.golang.org/grpc/keepalive"
 )
 
 type (
 	app struct {
-		pool *Pool
+		cli  sdk.Client
+		pool pool.Client
 		log  *zap.Logger
 		cfg  *viper.Viper
 		key  *ecdsa.PrivateKey
 
-		wlog logger
+		wlog logger.Logger
 		web  *fasthttp.Server
 
 		jobDone chan struct{}
 		webDone chan struct{}
 
-		rebalanceTimer time.Duration
-
-		nodes []string
-
 		conTimeout time.Duration
 		reqTimeout time.Duration
 	}
@@ -61,7 +67,7 @@ func WithConfig(c *viper.Viper) Option {
 	}
 }
 
-func newApp(opt ...Option) App {
+func newApp(ctx context.Context, opt ...Option) App {
 	a := &app{
 		log: zap.L(),
 		cfg: viper.GetViper(),
@@ -75,14 +81,12 @@ func newApp(opt ...Option) App {
 		opt[i](a)
 	}
 
-	a.wlog = gRPCLogger(a.log)
+	a.wlog = logger.GRPC(a.log)
 
 	if a.cfg.GetBool("verbose") {
 		grpclog.SetLoggerV2(a.wlog)
 	}
 
-	a.key = fetchKey(a.log, a.cfg)
-	a.rebalanceTimer = a.cfg.GetDuration("rebalance_timer")
 	a.conTimeout = a.cfg.GetDuration("connect_timeout")
 	a.reqTimeout = a.cfg.GetDuration("request_timeout")
 
@@ -98,11 +102,68 @@ func newApp(opt ...Option) App {
 	a.web.NoDefaultContentType = true
 	// -- -- -- -- -- -- -- -- -- --
 
-	a.pool = newPool(a.log, a.cfg, a.key)
+	connections := make(map[string]float64)
+	for i := 0; ; i++ {
+		address := a.cfg.GetString("peers." + strconv.Itoa(i) + ".address")
+		weight := a.cfg.GetFloat64("peers." + strconv.Itoa(i) + ".weight")
+		if address == "" {
+			break
+		}
+
+		connections[address] = weight
+	}
+
+	cred, err := prepareCredentials(a.cfg.GetString("key"), a.log)
+	if err != nil {
+		a.log.Fatal("could not prepare credentials", zap.Error(err))
+	}
+
+	a.pool, err = pool.New(ctx,
+		pool.WithLogger(a.log),
+		pool.WithCredentials(cred),
+		pool.WithWeightPool(connections),
+		pool.WithGRPCOptions(
+			grpc.WithBlock(),
+			grpc.WithInsecure(),
+			grpc.WithKeepaliveParams(keepalive.ClientParameters{
+				Time:                a.cfg.GetDuration("keepalive.time"),
+				Timeout:             a.cfg.GetDuration("keepalive.timeout"),
+				PermitWithoutStream: a.cfg.GetBool("keepalive.permit_without_stream"),
+			})))
+
+	if err != nil {
+		a.log.Fatal("could not prepare connection pool", zap.Error(err))
+	}
+
+	a.cli, err = sdk.New(ctx,
+		sdk.WithLogger(a.log),
+		sdk.WithCredentials(cred),
+		sdk.WithConnectionPool(a.pool))
+	if err != nil {
+		a.log.Fatal("could not prepare sdk client", zap.Error(err))
+	}
 
 	return a
 }
 
+func prepareCredentials(key string, log *zap.Logger) (neofs.Credentials, error) {
+	if key == generated {
+		sk, err := ecdsa.GenerateKey(elliptic.P256(), rand.Reader)
+		if err != nil {
+			return nil, err
+		}
+
+		key, err = crypto.WIFEncode(sk)
+		if err != nil {
+			return nil, err
+		}
+
+		log.Info("generate new key", zap.String("wif", key))
+	}
+
+	return neofs.New(key)
+}
+
 func (a *app) Wait() {
 	a.log.Info("application started")
 
@@ -115,37 +176,7 @@ func (a *app) Wait() {
 }
 
 func (a *app) Worker(ctx context.Context) {
-	dur := a.rebalanceTimer
+	a.pool.Worker(ctx)
-	tick := time.NewTimer(dur)
-
-	a.pool.reBalance(ctx)
-
-	switch _, err := a.pool.getConnection(ctx); {
-	case err == nil:
-		// ignore
-	case errors.Is(err, context.Canceled):
-		// ignore
-		// l.Info("context canceled")
-	default:
-		a.log.Fatal("could get connection", zap.Error(err))
-	}
-
-loop:
-	for {
-		select {
-		case <-ctx.Done():
-			break loop
-		case <-tick.C:
-			a.pool.reBalance(ctx)
-			tick.Reset(dur)
-		}
-	}
-
-	a.pool.close()
-	tick.Stop()
-
-	a.log.Info("connection worker stopped")
-
 	close(a.jobDone)
 }
 
@@ -163,7 +194,7 @@ func (a *app) Serve(ctx context.Context) {
 	r.GET("/get/{cid}/{oid}", a.receiveFile)
 
 	// attaching /-/(ready,healthy)
-	attachHealthy(r, a.pool.unhealthy)
+	attachHealthy(r, a.pool.Status)
 
 	// enable metrics
 	if a.cfg.GetBool("metrics") {

go.mod

@@ -4,7 +4,8 @@ go 1.13
 
 require (
 	github.com/fasthttp/router v1.1.6
-	github.com/nspcc-dev/neofs-api-go v1.0.0
+	github.com/nspcc-dev/cdn-neofs-sdk v0.0.0-20201110112919-ed1430a93074
+	github.com/nspcc-dev/neofs-api-go v0.0.0-20201029071528-352e99d9b91a
 	github.com/nspcc-dev/neofs-crypto v0.3.0
 	github.com/pkg/errors v0.9.1
 	github.com/prometheus/client_golang v1.6.0
@@ -12,8 +13,6 @@ require (
 	github.com/spf13/pflag v1.0.5
 	github.com/spf13/viper v1.7.0
 	github.com/valyala/fasthttp v1.14.0
-	go.uber.org/atomic v1.6.0
+	go.uber.org/zap v1.16.0
-	go.uber.org/zap v1.15.0
+	google.golang.org/grpc v1.33.1
-	golang.org/x/crypto v0.0.0-20191227163750-53104e6ec876 // indirect
-	google.golang.org/grpc v1.29.1
 )

go.sum

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@@ -105,8 +134,9 @@ github.com/google/martian v2.1.0+incompatible/go.mod h1:9I4somxYTbIHy5NJKHRl3wXi
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@@ -205,6 +262,7 @@ github.com/posener/complete v1.1.1/go.mod h1:em0nMJCgc9GFtwrmVmEMR/ZL6WyhyjMBndr
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@@ -215,18 +273,20 @@ github.com/prometheus/client_model v0.2.0/go.mod h1:xMI15A0UPsDsEKsMN9yxemIoYk6T
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@@ -245,31 +305,40 @@ github.com/spf13/afero v1.1.2 h1:m8/z1t7/fwjysjQRYbP0RD+bUIF/8tJwPdEZsI83ACI=
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@@ -281,16 +350,19 @@ go.uber.org/multierr v1.5.0/go.mod h1:FeouvMocqHpRaaGuG9EjoKcStLC43Zu/fmqdUMPcKY
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@@ -310,8 +382,10 @@ golang.org/x/mobile v0.0.0-20190312151609-d3739f865fa6/go.mod h1:z+o9i4GpDbdi3rU
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@@ -325,8 +399,9 @@ golang.org/x/net v0.0.0-20190503192946-f4e77d36d62c/go.mod h1:t9HGtf8HONx5eT2rtn
 golang.org/x/net v0.0.0-20190603091049-60506f45cf65/go.mod h1:HSz+uSET+XFnRR8LxR5pz3Of3rY3CfYBVs4xY44aLks=
 golang.org/x/net v0.0.0-20190613194153-d28f0bde5980/go.mod h1:z5CRVTTTmAJ677TzLLGU+0bjPO0LkuOLi4/5GtJWs/s=
 golang.org/x/net v0.0.0-20190620200207-3b0461eec859/go.mod h1:z5CRVTTTmAJ677TzLLGU+0bjPO0LkuOLi4/5GtJWs/s=
-golang.org/x/net v0.0.0-20200324143707-d3edc9973b7e h1:3G+cUijn7XD+S4eJFddp53Pv7+slrESplyjG25HgL+k=
 golang.org/x/net v0.0.0-20200324143707-d3edc9973b7e/go.mod h1:qpuaurCH72eLCgpAm/N6yyVIVM9cpaDIP3A8BGJEC5A=
+golang.org/x/net v0.0.0-20200602114024-627f9648deb9 h1:pNX+40auqi2JqRfOP1akLGtYcn15TUbkhwuCO3foqqM=
+golang.org/x/net v0.0.0-20200602114024-627f9648deb9/go.mod h1:qpuaurCH72eLCgpAm/N6yyVIVM9cpaDIP3A8BGJEC5A=
 golang.org/x/oauth2 v0.0.0-20180821212333-d2e6202438be/go.mod h1:N/0e6XlmueqKjAGxoOufVs8QHGRruUQn6yWY3a++T0U=
 golang.org/x/oauth2 v0.0.0-20190226205417-e64efc72b421/go.mod h1:gOpvHmFTYa4IltrdGE7lF6nIHvwfUNPOp7c8zoXwtLw=
 golang.org/x/oauth2 v0.0.0-20190604053449-0f29369cfe45/go.mod h1:gOpvHmFTYa4IltrdGE7lF6nIHvwfUNPOp7c8zoXwtLw=
@@ -339,11 +414,14 @@ golang.org/x/sync v0.0.0-20190911185100-cd5d95a43a6e/go.mod h1:RxMgew5VJxzue5/jJ
 golang.org/x/sys v0.0.0-20180823144017-11551d06cbcc/go.mod h1:STP8DvDyc/dI5b8T5hshtkjS+E42TnysNCUPdjciGhY=
 golang.org/x/sys v0.0.0-20180830151530-49385e6e1522/go.mod h1:STP8DvDyc/dI5b8T5hshtkjS+E42TnysNCUPdjciGhY=
 golang.org/x/sys v0.0.0-20180905080454-ebe1bf3edb33/go.mod h1:STP8DvDyc/dI5b8T5hshtkjS+E42TnysNCUPdjciGhY=
+golang.org/x/sys v0.0.0-20180909124046-d0be0721c37e/go.mod h1:STP8DvDyc/dI5b8T5hshtkjS+E42TnysNCUPdjciGhY=
 golang.org/x/sys v0.0.0-20181026203630-95b1ffbd15a5/go.mod h1:STP8DvDyc/dI5b8T5hshtkjS+E42TnysNCUPdjciGhY=
 golang.org/x/sys v0.0.0-20181107165924-66b7b1311ac8/go.mod h1:STP8DvDyc/dI5b8T5hshtkjS+E42TnysNCUPdjciGhY=
 golang.org/x/sys v0.0.0-20181116152217-5ac8a444bdc5/go.mod h1:STP8DvDyc/dI5b8T5hshtkjS+E42TnysNCUPdjciGhY=
-golang.org/x/sys v0.0.0-20181228144115-9a3f9b0469bb/go.mod h1:STP8DvDyc/dI5b8T5hshtkjS+E42TnysNCUPdjciGhY=
+golang.org/x/sys v0.0.0-20181205085412-a5c9d58dba9a/go.mod h1:STP8DvDyc/dI5b8T5hshtkjS+E42TnysNCUPdjciGhY=
+golang.org/x/sys v0.0.0-20190204203706-41f3e6584952/go.mod h1:STP8DvDyc/dI5b8T5hshtkjS+E42TnysNCUPdjciGhY=
 golang.org/x/sys v0.0.0-20190215142949-d0b11bdaac8a/go.mod h1:STP8DvDyc/dI5b8T5hshtkjS+E42TnysNCUPdjciGhY=
+golang.org/x/sys v0.0.0-20190222072716-a9d3bda3a223/go.mod h1:STP8DvDyc/dI5b8T5hshtkjS+E42TnysNCUPdjciGhY=
 golang.org/x/sys v0.0.0-20190312061237-fead79001313/go.mod h1:h1NjWce9XRLGQEsW7wpKNCjG9DtNlClVuFLEZdDNbEs=
 golang.org/x/sys v0.0.0-20190412213103-97732733099d/go.mod h1:h1NjWce9XRLGQEsW7wpKNCjG9DtNlClVuFLEZdDNbEs=
 golang.org/x/sys v0.0.0-20190422165155-953cdadca894/go.mod h1:h1NjWce9XRLGQEsW7wpKNCjG9DtNlClVuFLEZdDNbEs=
@@ -351,11 +429,16 @@ golang.org/x/sys v0.0.0-20190502145724-3ef323f4f1fd/go.mod h1:h1NjWce9XRLGQEsW7w
 golang.org/x/sys v0.0.0-20190507160741-ecd444e8653b/go.mod h1:h1NjWce9XRLGQEsW7wpKNCjG9DtNlClVuFLEZdDNbEs=
 golang.org/x/sys v0.0.0-20190606165138-5da285871e9c/go.mod h1:h1NjWce9XRLGQEsW7wpKNCjG9DtNlClVuFLEZdDNbEs=
 golang.org/x/sys v0.0.0-20190624142023-c5567b49c5d0/go.mod h1:h1NjWce9XRLGQEsW7wpKNCjG9DtNlClVuFLEZdDNbEs=
+golang.org/x/sys v0.0.0-20190626221950-04f50cda93cb/go.mod h1:h1NjWce9XRLGQEsW7wpKNCjG9DtNlClVuFLEZdDNbEs=
+golang.org/x/sys v0.0.0-20190813064441-fde4db37ae7a/go.mod h1:h1NjWce9XRLGQEsW7wpKNCjG9DtNlClVuFLEZdDNbEs=
+golang.org/x/sys v0.0.0-20191008105621-543471e840be/go.mod h1:h1NjWce9XRLGQEsW7wpKNCjG9DtNlClVuFLEZdDNbEs=
+golang.org/x/sys v0.0.0-20191010194322-b09406accb47/go.mod h1:h1NjWce9XRLGQEsW7wpKNCjG9DtNlClVuFLEZdDNbEs=
 golang.org/x/sys v0.0.0-20200106162015-b016eb3dc98e/go.mod h1:h1NjWce9XRLGQEsW7wpKNCjG9DtNlClVuFLEZdDNbEs=
-golang.org/x/sys v0.0.0-20200113162924-86b910548bc1/go.mod h1:h1NjWce9XRLGQEsW7wpKNCjG9DtNlClVuFLEZdDNbEs=
+golang.org/x/sys v0.0.0-20200202164722-d101bd2416d5/go.mod h1:h1NjWce9XRLGQEsW7wpKNCjG9DtNlClVuFLEZdDNbEs=
 golang.org/x/sys v0.0.0-20200323222414-85ca7c5b95cd/go.mod h1:h1NjWce9XRLGQEsW7wpKNCjG9DtNlClVuFLEZdDNbEs=
-golang.org/x/sys v0.0.0-20200420163511-1957bb5e6d1f h1:gWF768j/LaZugp8dyS4UwsslYCYz9XgFxvlgsn0n9H8=
 golang.org/x/sys v0.0.0-20200420163511-1957bb5e6d1f/go.mod h1:h1NjWce9XRLGQEsW7wpKNCjG9DtNlClVuFLEZdDNbEs=
+golang.org/x/sys v0.0.0-20200602225109-6fdc65e7d980 h1:OjiUf46hAmXblsZdnoSXsEUSKU8r1UEzcL5RVZ4gO9Y=
+golang.org/x/sys v0.0.0-20200602225109-6fdc65e7d980/go.mod h1:h1NjWce9XRLGQEsW7wpKNCjG9DtNlClVuFLEZdDNbEs=
 golang.org/x/text v0.3.0/go.mod h1:NqM8EUOU14njkJ3fqMW+pc6Ldnwhi/IjpwHt7yyuwOQ=
 golang.org/x/text v0.3.1-0.20180807135948-17ff2d5776d2/go.mod h1:NqM8EUOU14njkJ3fqMW+pc6Ldnwhi/IjpwHt7yyuwOQ=
 golang.org/x/text v0.3.2 h1:tW2bmiBqwgJj/UpqtC8EpXEZVYOwU0yG4iWbprSVAcs=
@@ -363,8 +446,8 @@ golang.org/x/text v0.3.2/go.mod h1:bEr9sfX3Q8Zfm5fL9x+3itogRgK3+ptLWKqgva+5dAk=
 golang.org/x/time v0.0.0-20181108054448-85acf8d2951c/go.mod h1:tRJNPiyCQ0inRvYxbN9jk5I+vvW/OXSQhTDSoE431IQ=
 golang.org/x/time v0.0.0-20190308202827-9d24e82272b4/go.mod h1:tRJNPiyCQ0inRvYxbN9jk5I+vvW/OXSQhTDSoE431IQ=
 golang.org/x/tools v0.0.0-20180221164845-07fd8470d635/go.mod h1:n7NCudcB/nEzxVGmLbDWY5pfWTLqBcC2KZ6jyYvM4mQ=
+golang.org/x/tools v0.0.0-20180318012157-96caea41033d/go.mod h1:n7NCudcB/nEzxVGmLbDWY5pfWTLqBcC2KZ6jyYvM4mQ=
 golang.org/x/tools v0.0.0-20180917221912-90fa682c2a6e/go.mod h1:n7NCudcB/nEzxVGmLbDWY5pfWTLqBcC2KZ6jyYvM4mQ=
-golang.org/x/tools v0.0.0-20181030221726-6c7e314b6563/go.mod h1:n7NCudcB/nEzxVGmLbDWY5pfWTLqBcC2KZ6jyYvM4mQ=
 golang.org/x/tools v0.0.0-20190114222345-bf090417da8b/go.mod h1:n7NCudcB/nEzxVGmLbDWY5pfWTLqBcC2KZ6jyYvM4mQ=
 golang.org/x/tools v0.0.0-20190226205152-f727befe758c/go.mod h1:9Yl7xja0Znq3iFh3HoIrodX9oNMXvdceNzlUR8zjMvY=
 golang.org/x/tools v0.0.0-20190311212946-11955173bddd/go.mod h1:LCzVGOaR6xXOjkQ3onu1FJEFr0SW1gC7cKk1uF8kGRs=
@@ -381,11 +464,12 @@ golang.org/x/tools v0.0.0-20190816200558-6889da9d5479/go.mod h1:b+2E5dAYhXwXZwtn
 golang.org/x/tools v0.0.0-20190911174233-4f2ddba30aff/go.mod h1:b+2E5dAYhXwXZwtnZ6UAqBI28+e2cm9otk0dWdXHAEo=
 golang.org/x/tools v0.0.0-20191012152004-8de300cfc20a/go.mod h1:b+2E5dAYhXwXZwtnZ6UAqBI28+e2cm9otk0dWdXHAEo=
 golang.org/x/tools v0.0.0-20191029041327-9cc4af7d6b2c/go.mod h1:b+2E5dAYhXwXZwtnZ6UAqBI28+e2cm9otk0dWdXHAEo=
-golang.org/x/tools v0.0.0-20191029190741-b9c20aec41a5 h1:hKsoRgsbwY1NafxrwTs+k64bikrLBkAgPir1TNCj3Zs=
 golang.org/x/tools v0.0.0-20191029190741-b9c20aec41a5/go.mod h1:b+2E5dAYhXwXZwtnZ6UAqBI28+e2cm9otk0dWdXHAEo=
-golang.org/x/tools v0.0.0-20191112195655-aa38f8e97acc h1:NCy3Ohtk6Iny5V/reW2Ktypo4zIpWBdRJ1uFMjBxdg8=
 golang.org/x/tools v0.0.0-20191112195655-aa38f8e97acc/go.mod h1:b+2E5dAYhXwXZwtnZ6UAqBI28+e2cm9otk0dWdXHAEo=
+golang.org/x/tools v0.0.0-20200123022218-593de606220b h1:ztSlcncMErSAUzXwnVO1iTPxHwtvOHBB26SGiyYXIEE=
+golang.org/x/tools v0.0.0-20200123022218-593de606220b/go.mod h1:TB2adYChydJhpapKDTa4BR/hXlZSLoq2Wpct/0txZ28=
 golang.org/x/xerrors v0.0.0-20190717185122-a985d3407aa7/go.mod h1:I/5z698sn9Ka8TeJc9MKroUUfqBBauWjQqLJ2OPfmY0=
+golang.org/x/xerrors v0.0.0-20191011141410-1b5146add898/go.mod h1:I/5z698sn9Ka8TeJc9MKroUUfqBBauWjQqLJ2OPfmY0=
 golang.org/x/xerrors v0.0.0-20191204190536-9bdfabe68543 h1:E7g+9GITq07hpfrRu66IVDexMakfv52eLZ2CXBWiKr4=
 golang.org/x/xerrors v0.0.0-20191204190536-9bdfabe68543/go.mod h1:I/5z698sn9Ka8TeJc9MKroUUfqBBauWjQqLJ2OPfmY0=
 google.golang.org/api v0.4.0/go.mod h1:8k5glujaEP+g9n7WNsDg8QP6cUVNI86fCNMcbazEtwE=
@@ -403,7 +487,6 @@ google.golang.org/genproto v0.0.0-20190418145605-e7d98fc518a7/go.mod h1:VzzqZJRn
 google.golang.org/genproto v0.0.0-20190425155659-357c62f0e4bb/go.mod h1:VzzqZJRnGkLBvHegQrXjBqPurQTc5/KpmUdxsrq26oE=
 google.golang.org/genproto v0.0.0-20190502173448-54afdca5d873/go.mod h1:VzzqZJRnGkLBvHegQrXjBqPurQTc5/KpmUdxsrq26oE=
 google.golang.org/genproto v0.0.0-20190801165951-fa694d86fc64/go.mod h1:DMBHOl98Agz4BDEuKkezgsaosCRResVns1a3J2ZsMNc=
-google.golang.org/genproto v0.0.0-20190819201941-24fa4b261c55 h1:gSJIx1SDwno+2ElGhA4+qG2zF97qiUzTM+rQ0klBOcE=
 google.golang.org/genproto v0.0.0-20190819201941-24fa4b261c55/go.mod h1:DMBHOl98Agz4BDEuKkezgsaosCRResVns1a3J2ZsMNc=
 google.golang.org/genproto v0.0.0-20190911173649-1774047e7e51/go.mod h1:IbNlFCBrqXvoKpeg0TB2l7cyZUmoaFKYIwrEpbDKLA8=
 google.golang.org/genproto v0.0.0-20191108220845-16a3f7862a1a h1:Ob5/580gVHBJZgXnff1cZDbG+xLtMVE5mDRTe+nIsX4=
@@ -413,13 +496,13 @@ google.golang.org/grpc v1.20.1/go.mod h1:10oTOabMzJvdu6/UiuZezV6QK5dSlG84ov/aaiq
 google.golang.org/grpc v1.21.1/go.mod h1:oYelfM1adQP15Ek0mdvEgi9Df8B9CZIaU1084ijfRaM=
 google.golang.org/grpc v1.23.0/go.mod h1:Y5yQAOtifL1yxbo5wqy6BxZv8vAUGQwXBOALyacEbxg=
 google.golang.org/grpc v1.25.1/go.mod h1:c3i+UQWmh7LiEpx4sFZnkU36qjEYZ0imhYfXVyQciAY=
-google.golang.org/grpc v1.29.1 h1:EC2SB8S04d2r73uptxphDSUG+kTKVgjRPF+N3xpxRB4=
 google.golang.org/grpc v1.29.1/go.mod h1:itym6AZVZYACWQqET3MqgPpjcuV5QH3BxFS3IjizoKk=
+google.golang.org/grpc v1.33.1 h1:DGeFlSan2f+WEtCERJ4J9GJWk15TxUi8QGagfI87Xyc=
+google.golang.org/grpc v1.33.1/go.mod h1:fr5YgcSWrqhRRxogOsw7RzIpsmvOZ6IcH4kBYTpR3n0=
 google.golang.org/protobuf v0.0.0-20200109180630-ec00e32a8dfd/go.mod h1:DFci5gLYBciE7Vtevhsrf46CRTquxDuWsQurQQe4oz8=
 google.golang.org/protobuf v0.0.0-20200221191635-4d8936d0db64/go.mod h1:kwYJMbMJ01Woi6D6+Kah6886xMZcty6N08ah7+eCXa0=
 google.golang.org/protobuf v0.0.0-20200228230310-ab0ca4ff8a60/go.mod h1:cfTl7dwQJ+fmap5saPgwCLgHXTUD7jkjRqWcaiX5VyM=
 google.golang.org/protobuf v1.20.1-0.20200309200217-e05f789c0967/go.mod h1:A+miEFZTKqfCUM6K7xSMQL9OKL/b6hQv+e19PK+JZNE=
-google.golang.org/protobuf v1.21.0 h1:qdOKuR/EIArgaWNjetjgTzgVTAZ+S/WXVrq9HW9zimw=
 google.golang.org/protobuf v1.21.0/go.mod h1:47Nbq4nVaFHyn7ilMalzfO3qCViNmqZ2kzikPIcrTAo=
 google.golang.org/protobuf v1.23.0 h1:4MY060fB1DLGMB/7MBTLnwQUY6+F09GEiz6SsrNqyzM=
 google.golang.org/protobuf v1.23.0/go.mod h1:EGpADcykh3NcUnDUJcl1+ZksZNG86OlYog2l/sGQquU=
@@ -430,15 +513,19 @@ gopkg.in/check.v1 v1.0.0-20180628173108-788fd7840127/go.mod h1:Co6ibVJAznAaIkqp8
 gopkg.in/check.v1 v1.0.0-20190902080502-41f04d3bba15 h1:YR8cESwS4TdDjEe65xsg0ogRM/Nc3DYOhEAlW+xobZo=
 gopkg.in/check.v1 v1.0.0-20190902080502-41f04d3bba15/go.mod h1:Co6ibVJAznAaIkqp8huTwlJQCZ016jof/cbN4VW5Yz0=
 gopkg.in/errgo.v2 v2.1.0/go.mod h1:hNsd1EY+bozCKY1Ytp96fpM3vjJbqLJn88ws8XvfDNI=
+gopkg.in/fsnotify.v1 v1.4.7/go.mod h1:Tz8NjZHkW78fSQdbUxIjBTcgA1z1m8ZHf0WmKUhAMys=
 gopkg.in/ini.v1 v1.51.0 h1:AQvPpx3LzTDM0AjnIRlVFwFFGC+npRopjZxLJj6gdno=
 gopkg.in/ini.v1 v1.51.0/go.mod h1:pNLf8WUiyNEtQjuu5G5vTm06TEv9tsIgeAvK8hOrP4k=
 gopkg.in/resty.v1 v1.12.0/go.mod h1:mDo4pnntr5jdWRML875a/NmxYqAlA73dVijT2AXvQQo=
+gopkg.in/tomb.v1 v1.0.0-20141024135613-dd632973f1e7/go.mod h1:dt/ZhP58zS4L8KSrWDmTeBkI65Dw0HsyUHuEVlX15mw=
 gopkg.in/yaml.v2 v2.0.0-20170812160011-eb3733d160e7/go.mod h1:JAlM8MvJe8wmxCU4Bli9HhUf9+ttbYbLASfIpnQbh74=
 gopkg.in/yaml.v2 v2.2.1/go.mod h1:hI93XBmqTisBFMUTm0b8Fm+jr3Dg1NNxqwp+5A1VGuI=
 gopkg.in/yaml.v2 v2.2.2/go.mod h1:hI93XBmqTisBFMUTm0b8Fm+jr3Dg1NNxqwp+5A1VGuI=
 gopkg.in/yaml.v2 v2.2.4/go.mod h1:hI93XBmqTisBFMUTm0b8Fm+jr3Dg1NNxqwp+5A1VGuI=
 gopkg.in/yaml.v2 v2.2.5 h1:ymVxjfMaHvXD8RqPRmzHHsB3VvucivSkIAvJFDI5O3c=
 gopkg.in/yaml.v2 v2.2.5/go.mod h1:hI93XBmqTisBFMUTm0b8Fm+jr3Dg1NNxqwp+5A1VGuI=
+gopkg.in/yaml.v3 v3.0.0-20200313102051-9f266ea9e77c h1:dUUwHk2QECo/6vqA44rthZ8ie2QXMNeKRTHCNY2nXvo=
+gopkg.in/yaml.v3 v3.0.0-20200313102051-9f266ea9e77c/go.mod h1:K4uyk7z7BCEPqu6E+C64Yfv1cQ7kz7rIZviUmN+EgEM=
 honnef.co/go/tools v0.0.0-20190102054323-c2f93a96b099/go.mod h1:rf3lG4BRIbNafJWhAfAdb/ePZxsR/4RtNHQocxwk9r4=
 honnef.co/go/tools v0.0.0-20190106161140-3f1c8253044a/go.mod h1:rf3lG4BRIbNafJWhAfAdb/ePZxsR/4RtNHQocxwk9r4=
 honnef.co/go/tools v0.0.0-20190418001031-e561f6794a2a/go.mod h1:rf3lG4BRIbNafJWhAfAdb/ePZxsR/4RtNHQocxwk9r4=

grace.go

@@ -1,24 +0,0 @@
-package main
-
-import (
-	"context"
-	"os"
-	"os/signal"
-	"syscall"
-
-	"go.uber.org/zap"
-)
-
-// newGracefulContext returns graceful context
-func newGracefulContext(l *zap.Logger) context.Context {
-	ctx, cancel := context.WithCancel(context.Background())
-	go func() {
-		ch := make(chan os.Signal, 1)
-		signal.Notify(ch, syscall.SIGINT, syscall.SIGTERM, syscall.SIGHUP)
-		sig := <-ch
-		l.Info("received signal",
-			zap.String("signal", sig.String()))
-		cancel()
-	}()
-	return ctx
-}

health.go

@@ -3,15 +3,16 @@ package main
 import (
 	"github.com/fasthttp/router"
 	"github.com/valyala/fasthttp"
-	"go.uber.org/atomic"
 )
 
+type stater func() error
+
 const (
 	healthyState       = "NeoFS HTTP Gateway is "
 	defaultContentType = "text/plain; charset=utf-8"
 )
 
-func attachHealthy(r *router.Router, e *atomic.Error) {
+func attachHealthy(r *router.Router, e stater) {
 	r.GET("/-/ready/", func(ctx *fasthttp.RequestCtx) {
 		ctx.SetStatusCode(fasthttp.StatusOK)
 		ctx.SetBodyString(healthyState + "ready")
@@ -21,7 +22,7 @@ func attachHealthy(r *router.Router, e *atomic.Error) {
 		code := fasthttp.StatusOK
 		msg := "healthy"
 
-		if err := e.Load(); err != nil {
+		if err := e(); err != nil {
 			msg = "unhealthy: " + err.Error()
 			code = fasthttp.StatusBadRequest
 		}

logger.go

@@ -1,143 +0,0 @@
-package main
-
-import (
-	"strings"
-
-	"google.golang.org/grpc/grpclog"
-
-	"github.com/spf13/viper"
-	"go.uber.org/zap"
-	"go.uber.org/zap/zapcore"
-)
-
-type (
-	zapLogger struct {
-		zapcore.Core
-		log *zap.SugaredLogger
-	}
-
-	logger interface {
-		grpclog.LoggerV2
-		Println(v ...interface{})
-	}
-)
-
-const (
-	formatJSON    = "json"
-	formatConsole = "console"
-
-	defaultSamplingInitial    = 100
-	defaultSamplingThereafter = 100
-)
-
-func gRPCLogger(l *zap.Logger) logger {
-	log := l.WithOptions(
-		// skip gRPCLog + zapLogger in caller
-		zap.AddCallerSkip(2))
-	return &zapLogger{
-		Core: log.Core(),
-		log:  log.Sugar(),
-	}
-}
-
-func safeLevel(lvl string) zap.AtomicLevel {
-	switch strings.ToLower(lvl) {
-	case "debug":
-		return zap.NewAtomicLevelAt(zap.DebugLevel)
-	case "warn":
-		return zap.NewAtomicLevelAt(zap.WarnLevel)
-	case "error":
-		return zap.NewAtomicLevelAt(zap.ErrorLevel)
-	case "fatal":
-		return zap.NewAtomicLevelAt(zap.FatalLevel)
-	case "panic":
-		return zap.NewAtomicLevelAt(zap.PanicLevel)
-	default:
-		return zap.NewAtomicLevelAt(zap.InfoLevel)
-	}
-}
-
-func newLogger(v *viper.Viper) *zap.Logger {
-	c := zap.NewProductionConfig()
-
-	c.OutputPaths = []string{"stdout"}
-	c.ErrorOutputPaths = []string{"stdout"}
-
-	if v.IsSet("logger.sampling") {
-		c.Sampling = &zap.SamplingConfig{
-			Initial:    defaultSamplingInitial,
-			Thereafter: defaultSamplingThereafter,
-		}
-
-		if val := v.GetInt("logger.sampling.initial"); val > 0 {
-			c.Sampling.Initial = val
-		}
-
-		if val := v.GetInt("logger.sampling.thereafter"); val > 0 {
-			c.Sampling.Thereafter = val
-		}
-	}
-
-	// logger level
-	c.Level = safeLevel(v.GetString("logger.level"))
-	traceLvl := safeLevel(v.GetString("logger.trace_level"))
-
-	// logger format
-	switch f := v.GetString("logger.format"); strings.ToLower(f) {
-	case formatConsole:
-		c.Encoding = formatConsole
-	default:
-		c.Encoding = formatJSON
-	}
-
-	// logger time
-	c.EncoderConfig.EncodeTime = zapcore.ISO8601TimeEncoder
-
-	l, err := c.Build(
-		// enable trace only for current log-level
-		zap.AddStacktrace(traceLvl))
-	if err != nil {
-		panic(err)
-	}
-
-	if v.GetBool("logger.no_disclaimer") {
-		return l
-	}
-
-	name := v.GetString("app.name")
-	version := v.GetString("app.version")
-
-	return l.With(
-		zap.String("app_name", name),
-		zap.String("app_version", version))
-}
-
-func (z *zapLogger) Info(args ...interface{}) { z.log.Info(args...) }
-
-func (z *zapLogger) Infoln(args ...interface{}) { z.log.Info(args...) }
-
-func (z *zapLogger) Infof(format string, args ...interface{}) { z.log.Infof(format, args...) }
-
-func (z *zapLogger) Println(args ...interface{}) { z.log.Info(args...) }
-
-func (z *zapLogger) Printf(format string, args ...interface{}) { z.log.Infof(format, args...) }
-
-func (z *zapLogger) Warning(args ...interface{}) { z.log.Warn(args...) }
-
-func (z *zapLogger) Warningln(args ...interface{}) { z.log.Warn(args...) }
-
-func (z *zapLogger) Warningf(format string, args ...interface{}) { z.log.Warnf(format, args...) }
-
-func (z *zapLogger) Error(args ...interface{}) { z.log.Error(args...) }
-
-func (z *zapLogger) Errorln(args ...interface{}) { z.log.Error(args...) }
-
-func (z *zapLogger) Errorf(format string, args ...interface{}) { z.log.Errorf(format, args...) }
-
-func (z *zapLogger) Fatal(args ...interface{}) { z.log.Fatal(args...) }
-
-func (z *zapLogger) Fatalln(args ...interface{}) { z.log.Fatal(args...) }
-
-func (z *zapLogger) Fatalf(format string, args ...interface{}) { z.Fatalf(format, args...) }
-
-func (z *zapLogger) V(int) bool { return z.Enabled(zapcore.DebugLevel) }

main.go

@@ -1,12 +1,49 @@
 package main
 
+import (
+	"github.com/nspcc-dev/cdn-neofs-sdk/grace"
+	"github.com/nspcc-dev/cdn-neofs-sdk/logger"
+	"github.com/spf13/viper"
+	"go.uber.org/zap"
+)
+
+func newLogger(v *viper.Viper) *zap.Logger {
+	options := []logger.Option{
+		logger.WithLevel(v.GetString("logger.level")),
+		logger.WithTraceLevel(v.GetString("logger.trace_level")),
+
+		logger.WithFormat(v.GetString("logger.format")),
+
+		logger.WithSamplingInitial(v.GetInt("logger.sampling.initial")),
+		logger.WithSamplingThereafter(v.GetInt("logger.sampling.thereafter")),
+
+		logger.WithAppName(v.GetString("app_name")),
+		logger.WithAppVersion(v.GetString("app_version")),
+	}
+
+	if v.GetBool("logger.no_caller") {
+		options = append(options, logger.WithoutCaller())
+	}
+
+	if v.GetBool("logger.no_disclaimer") {
+		options = append(options, logger.WithoutDisclaimer())
+	}
+
+	l, err := logger.New(options...)
+	if err != nil {
+		panic(err)
+	}
+
+	return l
+}
+
 func main() {
 	var (
 		v = settings()
 		l = newLogger(v)
-		g = newGracefulContext(l)
+		g = grace.Context(l)
 
-		a = newApp(
+		a = newApp(g,
 			WithLogger(l),
 			WithConfig(v))
 	)

pool.go

@@ -1,335 +0,0 @@
-package main
-
-import (
-	"context"
-	"crypto/ecdsa"
-	crand "crypto/rand"
-	"encoding/binary"
-	"errors"
-	"math/rand"
-	"sort"
-	"strconv"
-	"sync"
-	"time"
-
-	"github.com/nspcc-dev/neofs-api-go/service"
-	"github.com/nspcc-dev/neofs-api-go/state"
-	"github.com/spf13/viper"
-	"go.uber.org/atomic"
-	"go.uber.org/zap"
-	"google.golang.org/grpc"
-	"google.golang.org/grpc/connectivity"
-	"google.golang.org/grpc/keepalive"
-)
-
-type (
-	node struct {
-		index   int32
-		address string
-		weight  uint32
-		usedAt  time.Time
-		conn    *grpc.ClientConn
-	}
-
-	Pool struct {
-		log *zap.Logger
-
-		ttl time.Duration
-
-		conTimeout time.Duration
-		reqTimeout time.Duration
-		opts       keepalive.ClientParameters
-
-		reqHealth *state.HealthRequest
-
-		currentIdx  *atomic.Int32
-		currentConn *grpc.ClientConn
-
-		*sync.Mutex
-		nodes []*node
-		keys  []uint32
-		conns map[uint32][]*node
-
-		unhealthy *atomic.Error
-	}
-)
-
-var (
-	errBootstrapping        = errors.New("bootstrapping")
-	errEmptyConnection      = errors.New("empty connection")
-	errNoHealthyConnections = errors.New("no active connections")
-)
-
-func newPool(l *zap.Logger, v *viper.Viper, key *ecdsa.PrivateKey) *Pool {
-	p := &Pool{
-		log:   l,
-		Mutex: new(sync.Mutex),
-		keys:  make([]uint32, 0),
-		nodes: make([]*node, 0),
-		conns: make(map[uint32][]*node),
-
-		ttl: defaultTTL,
-
-		currentIdx: atomic.NewInt32(-1),
-
-		// fill with defaults:
-		reqTimeout: defaultRequestTimeout,
-		conTimeout: defaultConnectTimeout,
-		opts: keepalive.ClientParameters{
-			Time:                defaultKeepaliveTime,
-			Timeout:             defaultKeepaliveTimeout,
-			PermitWithoutStream: true,
-		},
-
-		unhealthy: atomic.NewError(errBootstrapping),
-	}
-
-	buf := make([]byte, 8)
-	if _, err := crand.Read(buf); err != nil {
-		l.Panic("could not read seed", zap.Error(err))
-	}
-
-	seed := binary.BigEndian.Uint64(buf)
-	rand.Seed(int64(seed))
-	l.Info("used random seed", zap.Uint64("seed", seed))
-
-	p.reqHealth = new(state.HealthRequest)
-	p.reqHealth.SetTTL(service.NonForwardingTTL)
-
-	if err := service.SignDataWithSessionToken(key, p.reqHealth); err != nil {
-		l.Fatal("could not sign `HealthRequest`", zap.Error(err))
-	}
-
-	if val := v.GetDuration("conn_ttl"); val > 0 {
-		p.ttl = val
-	}
-
-	if val := v.GetDuration("connect_timeout"); val > 0 {
-		p.conTimeout = val
-	}
-
-	if val := v.GetDuration("keepalive.time"); val > 0 {
-		p.opts.Time = val
-	}
-
-	if val := v.GetDuration("keepalive.timeout"); val > 0 {
-		p.opts.Timeout = val
-	}
-
-	if v.IsSet("keepalive.permit_without_stream") {
-		p.opts.PermitWithoutStream = v.GetBool("keepalive.permit_without_stream")
-	}
-
-	for i := 0; ; i++ {
-		key := "peers." + strconv.Itoa(i) + "."
-		address := v.GetString(key + "address")
-		weight := v.GetFloat64(key + "weight")
-
-		if address == "" {
-			l.Warn("skip, empty address")
-			break
-		}
-
-		p.nodes = append(p.nodes, &node{
-			index:   int32(i),
-			address: address,
-			weight:  uint32(weight * 100),
-		})
-
-		l.Info("add new peer",
-			zap.String("address", p.nodes[i].address),
-			zap.Uint32("weight", p.nodes[i].weight))
-	}
-
-	return p
-}
-
-func (p *Pool) close() {
-	p.Lock()
-	defer p.Unlock()
-
-	for i := range p.nodes {
-		if p.nodes[i] == nil || p.nodes[i].conn == nil {
-			continue
-		}
-
-		p.log.Warn("close connection",
-			zap.String("address", p.nodes[i].address),
-			zap.Error(p.nodes[i].conn.Close()))
-	}
-}
-
-func (p *Pool) reBalance(ctx context.Context) {
-	p.Lock()
-	defer func() {
-		p.Unlock()
-
-		_, err := p.getConnection(ctx)
-		p.unhealthy.Store(err)
-	}()
-
-	keys := make(map[uint32]struct{})
-
-	p.log.Info("re-balancing connections")
-
-	for i := range p.nodes {
-		var (
-			idx    = -1
-			exists bool
-			err    error
-			start  = time.Now()
-			conn   = p.nodes[i].conn
-			weight = p.nodes[i].weight
-		)
-
-		if err = ctx.Err(); err != nil {
-			p.log.Warn("something went wrong", zap.Error(err))
-			p.unhealthy.Store(err)
-
-			return
-		}
-
-		if conn == nil {
-			p.log.Warn("empty connection, try to connect",
-				zap.String("address", p.nodes[i].address))
-
-			ctx, cancel := context.WithTimeout(ctx, p.conTimeout)
-			conn, err = grpc.DialContext(ctx, p.nodes[i].address,
-				grpc.WithBlock(),
-				grpc.WithInsecure(),
-				grpc.WithKeepaliveParams(p.opts))
-			cancel()
-
-			if err != nil || conn == nil {
-				p.log.Warn("skip, could not connect to node",
-					zap.String("address", p.nodes[i].address),
-					zap.Stringer("elapsed", time.Since(start)),
-					zap.Error(err))
-				continue
-			}
-
-			p.nodes[i].conn = conn
-			p.nodes[i].usedAt = time.Now()
-			p.log.Info("connected to node", zap.String("address", p.nodes[i].address))
-		}
-
-		for j := range p.conns[weight] {
-			if p.conns[weight][j] != nil && p.conns[weight][j].conn == conn {
-				idx = j
-				exists = true
-				break
-			}
-		}
-
-		usedAt := time.Since(p.nodes[i].usedAt)
-
-		// if something wrong with connection (bad state, unhealthy or not used a long time), try to close it and remove
-		if err = p.isAlive(ctx, conn); err != nil || usedAt > p.ttl {
-			p.log.Warn("connection not alive",
-				zap.String("address", p.nodes[i].address),
-				zap.Stringer("used_at", usedAt),
-				zap.Error(err))
-
-			if exists {
-				// remove from connections
-				p.conns[weight] = append(p.conns[weight][:idx], p.conns[weight][idx+1:]...)
-			}
-
-			if err = conn.Close(); err != nil {
-				p.log.Warn("could not close bad connection",
-					zap.String("address", p.nodes[i].address),
-					zap.Stringer("used_at", usedAt),
-					zap.Error(err))
-			}
-
-			if p.nodes[i].conn != nil {
-				p.nodes[i].conn = nil
-			}
-			continue
-		}
-
-		keys[weight] = struct{}{}
-
-		p.log.Info("connection alive",
-			zap.String("address", p.nodes[i].address),
-			zap.Stringer("used_at", usedAt))
-
-		if !exists {
-			p.conns[weight] = append(p.conns[weight], p.nodes[i])
-		}
-	}
-
-	p.keys = p.keys[:0]
-	for w := range keys {
-		p.keys = append(p.keys, w)
-	}
-
-	sort.Slice(p.keys, func(i, j int) bool {
-		return p.keys[i] > p.keys[j]
-	})
-}
-
-func (p *Pool) getConnection(ctx context.Context) (*grpc.ClientConn, error) {
-	p.Lock()
-	defer p.Unlock()
-
-	if err := p.isAlive(ctx, p.currentConn); err == nil {
-		if id := p.currentIdx.Load(); id != -1 && p.nodes[id] != nil {
-			p.nodes[id].usedAt = time.Now()
-		}
-
-		return p.currentConn, nil
-	}
-
-	for _, w := range p.keys {
-		switch ln := len(p.conns[w]); ln {
-		case 0:
-			continue
-		case 1:
-			p.currentConn = p.conns[w][0].conn
-			p.conns[w][0].usedAt = time.Now()
-			p.currentIdx.Store(p.conns[w][0].index)
-			return p.currentConn, nil
-		default: // > 1
-			i := rand.Intn(ln)
-			p.currentConn = p.conns[w][i].conn
-			p.conns[w][i].usedAt = time.Now()
-			p.currentIdx.Store(p.conns[w][i].index)
-			return p.currentConn, nil
-		}
-	}
-
-	p.currentConn = nil
-	p.currentIdx.Store(-1)
-
-	if ctx.Err() != nil {
-		return nil, ctx.Err()
-	}
-
-	return nil, errNoHealthyConnections
-}
-
-func (p *Pool) isAlive(ctx context.Context, cur *grpc.ClientConn) error {
-	if cur == nil {
-		return errEmptyConnection
-	}
-
-	switch st := cur.GetState(); st {
-	case connectivity.Idle, connectivity.Ready, connectivity.Connecting:
-		ctx, cancel := context.WithTimeout(ctx, p.reqTimeout)
-		defer cancel()
-
-		res, err := state.NewStatusClient(cur).HealthCheck(ctx, p.reqHealth)
-		if err != nil {
-			p.log.Warn("could not fetch health-check", zap.Error(err))
-
-			return err
-		} else if !res.Healthy {
-			return errors.New(res.Status)
-		}
-
-		return nil
-	default:
-		return errors.New(st.String())
-	}
-}

receive.go

@@ -1,35 +1,53 @@
 package main
 
 import (
-	"context"
 	"io"
 	"net/http"
 	"path"
 	"strconv"
+	"strings"
+	"sync"
 	"time"
 
-	"github.com/nspcc-dev/neofs-api-go/object"
+	sdk "github.com/nspcc-dev/cdn-neofs-sdk"
-	"github.com/nspcc-dev/neofs-api-go/refs"
+	"github.com/nspcc-dev/neofs-api-go/pkg/object"
-	"github.com/nspcc-dev/neofs-api-go/service"
 	"github.com/pkg/errors"
 	"github.com/valyala/fasthttp"
 	"go.uber.org/zap"
-	"google.golang.org/grpc"
 	"google.golang.org/grpc/codes"
 	"google.golang.org/grpc/status"
 )
 
+type detector struct {
+	io.Writer
+	sync.Once
+
+	contentType string
+}
+
+func newDetector(w io.Writer) *detector {
+	return &detector{Writer: w}
+}
+
+func (d *detector) Write(data []byte) (int, error) {
+	d.Once.Do(func() {
+		d.contentType = http.DetectContentType(data)
+	})
+
+	return d.Writer.Write(data)
+}
+
 func (a *app) receiveFile(c *fasthttp.RequestCtx) {
 	var (
 		err     error
-		cid     refs.CID
+		disp    = "inline"
-		oid     refs.ObjectID
 		start   = time.Now()
-		con     *grpc.ClientConn
+		address = object.NewAddress()
-		cli     object.Service_GetClient
-		ctx     context.Context
 		sCID, _ = c.UserValue("cid").(string)
 		sOID, _ = c.UserValue("oid").(string)
+		value   = strings.Join([]string{sCID, sOID}, "/")
+
+		filename string
 	)
 
 	log := a.log.With(
@@ -37,57 +55,15 @@ func (a *app) receiveFile(c *fasthttp.RequestCtx) {
 		zap.String("cid", sCID),
 		zap.String("oid", sOID))
 
-	if err = cid.Parse(sCID); err != nil {
+	if err = address.Parse(value); err != nil {
-		log.Error("wrong container id", zap.Error(err))
+		log.Error("wrong object address", zap.Error(err))
-
+		c.Error("wrong object address", fasthttp.StatusBadRequest)
-		c.Error("wrong container id", fasthttp.StatusBadRequest)
-		return
-	} else if err = oid.Parse(sOID); err != nil {
-		log.Error("wrong object id", zap.Error(err))
-
-		c.Error("wrong object id", fasthttp.StatusBadRequest)
 		return
 	}
 
-	{ // try to connect or throw http error:
+	writer := newDetector(c.Response.BodyWriter())
-		ctx, cancel := context.WithTimeout(c, a.reqTimeout)
+	obj, err := a.cli.Object().Get(c, address, sdk.WithGetWriter(writer))
-		defer cancel()
+	if err != nil {
-
-		if con, err = a.pool.getConnection(ctx); err != nil {
-			log.Error("getConnection timeout", zap.Error(err))
-			c.Error("could not get alive connection", fasthttp.StatusBadRequest)
-			return
-		}
-	}
-
-	ctx, cancel := context.WithTimeout(c, a.reqTimeout)
-	defer cancel()
-
-	log = log.With(zap.String("node", con.Target()))
-
-	defer func() {
-		if err != nil {
-			return
-		}
-
-		log.Info("object sent to client", zap.Stringer("elapsed", time.Since(start)))
-	}()
-
-	req := &object.GetRequest{Address: refs.Address{ObjectID: oid, CID: cid}}
-	req.SetTTL(service.SingleForwardingTTL)
-
-	if err = service.SignDataWithSessionToken(a.key, req); err != nil {
-		log.Error("could not sign request", zap.Error(err))
-		c.Error("could not sign request", fasthttp.StatusBadRequest)
-		return
-	}
-
-	if cli, err = object.NewServiceClient(con).Get(ctx, req); err != nil {
-		log.Error("could not prepare connection", zap.Error(err))
-
-		c.Error("could not prepare connection", fasthttp.StatusBadRequest)
-		return
-	} else if err = receiveObject(c, cli); err != nil {
 		log.Error("could not receive object",
 			zap.Stringer("elapsed", time.Since(start)),
 			zap.Error(err))
@@ -108,67 +84,26 @@ func (a *app) receiveFile(c *fasthttp.RequestCtx) {
 		c.Error(msg, code)
 		return
 	}
-}
 
-func receiveObject(c *fasthttp.RequestCtx, cli object.Service_GetClient) error {
+	if c.Request.URI().QueryArgs().GetBool("download") {
-	var (
+		disp = "attachment"
-		typ string
-		content_disp_type string = "inline"
-		put = c.Request.URI().QueryArgs().GetBool("download")
-	)
-
-	for {
-		resp, err := cli.Recv()
-		if err != nil {
-			if err == io.EOF {
-				break
-			}
-			return err
-		}
-
-		switch o := resp.R.(type) {
-		case *object.GetResponse_Object:
-			obj := o.Object
-
-			c.Response.Header.Set("Content-Length", strconv.FormatUint(obj.SystemHeader.PayloadLength, 10))
-			c.Response.Header.Set("x-object-id", obj.SystemHeader.ID.String())
-			c.Response.Header.Set("x-owner-id", obj.SystemHeader.OwnerID.String())
-			c.Response.Header.Set("x-container-id", obj.SystemHeader.CID.String())
-
-			for i := range obj.Headers {
-				if hdr := obj.Headers[i].GetUserHeader(); hdr != nil {
-					c.Response.Header.Set("x-"+hdr.Key, hdr.Value)
-
-					if hdr.Key == object.FilenameHeader {
-						if put { 
-							content_disp_type = "attachment" 
-						} 
-						// NOTE: we use path.Base because hdr.Value can be something like `/path/to/filename.ext`
-						c.Response.Header.Set("Content-Disposition", content_disp_type+"; filename="+path.Base(hdr.Value))
-					}
-				}
-			}
-
-			if len(obj.Payload) > 0 {
-				typ = http.DetectContentType(obj.Payload)
-			}
-
-			if _, err = c.Write(obj.Payload); err != nil {
-				return err
-			}
-
-		case *object.GetResponse_Chunk:
-			if typ == "" {
-				typ = http.DetectContentType(o.Chunk)
-			}
-
-			if _, err = c.Write(o.Chunk); err != nil {
-				return err
-			}
-		}
 	}
 
-	c.SetContentType(typ)
+	c.Response.Header.Set("Content-Length", strconv.FormatUint(obj.GetPayloadSize(), 10))
+	c.Response.Header.Set("x-object-id", obj.GetID().String())
+	c.Response.Header.Set("x-owner-id", obj.GetOwnerID().String())
+	c.Response.Header.Set("x-container-id", obj.GetContainerID().String())
 
-	return nil
+	for _, attr := range obj.GetAttributes() {
+		key := attr.GetKey()
+		val := attr.GetValue()
+		if key == object.AttributeFileName {
+			filename = val
+		}
+
+		c.Response.Header.Set("x-"+key, val)
+	}
+
+	c.SetContentType(writer.contentType)
+	c.Response.Header.Set("Content-Disposition", disp+"; filename="+path.Base(filename))
 }

settings.go

@@ -1,9 +1,6 @@
 package main
 
 import (
-	"crypto/ecdsa"
-	"crypto/elliptic"
-	"crypto/rand"
 	"fmt"
 	"io"
 	"os"
@@ -11,11 +8,8 @@ import (
 	"strings"
 	"time"
 
-	"github.com/nspcc-dev/neofs-api-go/refs"
-	crypto "github.com/nspcc-dev/neofs-crypto"
 	"github.com/spf13/pflag"
 	"github.com/spf13/viper"
-	"go.uber.org/zap"
 )
 
 type empty int
@@ -38,33 +32,6 @@ const (
 
 func (empty) Read([]byte) (int, error) { return 0, io.EOF }
 
-func fetchKey(l *zap.Logger, v *viper.Viper) *ecdsa.PrivateKey {
-	switch val := v.GetString("key"); val {
-	case generated:
-		key, err := ecdsa.GenerateKey(elliptic.P256(), rand.Reader)
-		if err != nil {
-			l.Fatal("could not generate private key", zap.Error(err))
-		}
-
-		id, err := refs.NewOwnerID(&key.PublicKey)
-		l.Info("generate new key",
-			zap.Stringer("key", id),
-			zap.Error(err))
-
-		return key
-
-	default:
-		key, err := crypto.LoadPrivateKey(val)
-		if err != nil {
-			l.Fatal("could not load private key",
-				zap.String("key", v.GetString("key")),
-				zap.Error(err))
-		}
-
-		return key
-	}
-}
-
 func settings() *viper.Viper {
 	v := viper.New()
 	v.AutomaticEnv()
@@ -104,6 +71,7 @@ func settings() *viper.Viper {
 	v.SetDefault("logger.level", "debug")
 	v.SetDefault("logger.format", "console")
 	v.SetDefault("logger.trace_level", "fatal")
+	v.SetDefault("logger.no_caller", false)
 	v.SetDefault("logger.no_disclaimer", true)
 	v.SetDefault("logger.sampling.initial", 1000)
 	v.SetDefault("logger.sampling.thereafter", 1000)