Merge pull request #4 from nspcc-dev/migrate-to-cdn-sdk

Migrate to new release of NeoFS API

Dockerfile

@@ -14,7 +14,12 @@ COPY . /src
 ARG VERSION=dev
 ENV LDFLAGS "-w -s -X main.Version=${VERSION}"
 RUN set -x \
-    && go build -v -mod=vendor -trimpath -ldflags "${LDFLAGS} -X main.Build=$(date -u +%s%N)" -o /go/bin/neofs-gw ./ \
+    && go build \
+      -v \
+      -mod=vendor \
+      -trimpath \
+      -ldflags "${LDFLAGS} -X main.Build=$(date -u +%s%N) -X main.Prefix=HTTP_GW" \
+      -o /go/bin/neofs-gw ./ \
     && upx -3 /go/bin/neofs-gw
 
 # Executable image

README.md

@@ -39,3 +39,6 @@ of Timeout and if no activity is seen even after that the connection is closed
 GW_KEEPALIVE_PERMIT_WITHOUT_STREAM=Bool - if true, client sends keepalive pings even with no active RPCs.
 If false, when there are no active RPCs, Time and Timeout will be ignored and no keepalive pings will be sent.
 ```
+
+### WARNING
+`generated` value for `GW_KEY` or `--key` is deprecated, you should use pre-generated keys.

app.go

@@ -6,7 +6,6 @@ import (
 	"crypto/elliptic"
 	"crypto/rand"
 	"strconv"
-	"time"
 
 	"github.com/fasthttp/router"
 	sdk "github.com/nspcc-dev/cdn-neofs-sdk"
@@ -35,9 +34,6 @@ type (
 
 		jobDone chan struct{}
 		webDone chan struct{}
-
-		conTimeout time.Duration
-		reqTimeout time.Duration
 	}
 
 	App interface {
@@ -87,8 +83,9 @@ func newApp(ctx context.Context, opt ...Option) App {
 		grpclog.SetLoggerV2(a.wlog)
 	}
 
-	a.conTimeout = a.cfg.GetDuration("connect_timeout")
+	conTimeout := a.cfg.GetDuration("connect_timeout")
-	a.reqTimeout = a.cfg.GetDuration("request_timeout")
+	reqTimeout := a.cfg.GetDuration("request_timeout")
+	tckTimeout := a.cfg.GetDuration("rebalance_timer")
 
 	// -- setup FastHTTP server: --
 	a.web.Name = "neofs-http-gate"
@@ -111,6 +108,9 @@ func newApp(ctx context.Context, opt ...Option) App {
 		}
 
 		connections[address] = weight
+		a.log.Info("add connection peer",
+			zap.String("address", address),
+			zap.Float64("weight", weight))
 	}
 
 	cred, err := prepareCredentials(a.cfg.GetString("key"), a.log)
@@ -122,6 +122,10 @@ func newApp(ctx context.Context, opt ...Option) App {
 		pool.WithLogger(a.log),
 		pool.WithCredentials(cred),
 		pool.WithWeightPool(connections),
+		pool.WithTickerTimeout(tckTimeout),
+		pool.WithConnectTimeout(conTimeout),
+		pool.WithRequestTimeout(reqTimeout),
+		pool.WithAPIPreparer(sdk.APIPreparer),
 		pool.WithGRPCOptions(
 			grpc.WithBlock(),
 			grpc.WithInsecure(),
@@ -138,7 +142,8 @@ func newApp(ctx context.Context, opt ...Option) App {
 	a.cli, err = sdk.New(ctx,
 		sdk.WithLogger(a.log),
 		sdk.WithCredentials(cred),
-		sdk.WithConnectionPool(a.pool))
+		sdk.WithConnectionPool(a.pool),
+		sdk.WithAPIPreparer(sdk.APIPreparer))
 	if err != nil {
 		a.log.Fatal("could not prepare sdk client", zap.Error(err))
 	}
@@ -148,6 +153,8 @@ func newApp(ctx context.Context, opt ...Option) App {
 
 func prepareCredentials(key string, log *zap.Logger) (neofs.Credentials, error) {
 	if key == generated {
+		log.Fatal("Don't use generated key, deprecated")
+
 		sk, err := ecdsa.GenerateKey(elliptic.P256(), rand.Reader)
 		if err != nil {
 			return nil, err

go.mod

@@ -3,16 +3,18 @@ module github.com/nspcc-dev/neofs-http-gate
 go 1.13
 
 require (
-	github.com/fasthttp/router v1.1.6
+	github.com/fasthttp/router v1.3.3
-	github.com/nspcc-dev/cdn-neofs-sdk v0.0.0-20201113175725-f448ffe8047c
+	github.com/nspcc-dev/cdn-neofs-sdk v0.0.0
-	github.com/nspcc-dev/neofs-api-go v0.0.0-20201029071528-352e99d9b91a
+	github.com/nspcc-dev/neofs-api-go v1.20.3
 	github.com/nspcc-dev/neofs-crypto v0.3.0
 	github.com/pkg/errors v0.9.1
-	github.com/prometheus/client_golang v1.6.0
+	github.com/prometheus/client_golang v1.8.0
-	github.com/prometheus/common v0.10.0
+	github.com/prometheus/common v0.15.0
 	github.com/spf13/pflag v1.0.5
-	github.com/spf13/viper v1.7.0
+	github.com/spf13/viper v1.7.1
-	github.com/valyala/fasthttp v1.14.0
+	github.com/valyala/fasthttp v1.17.0
 	go.uber.org/zap v1.16.0
-	google.golang.org/grpc v1.33.1
+	google.golang.org/grpc v1.33.2
 )
+
+replace github.com/nspcc-dev/cdn-neofs-sdk => ../sdk

go.sum

@@ -19,23 +19,35 @@ github.com/CityOfZion/neo-go v0.70.1-pre.0.20191209120015-fccb0085941e/go.mod h1
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@@ -51,6 +63,8 @@ github.com/btcsuite/goleveldb v0.0.0-20160330041536-7834afc9e8cd/go.mod h1:F+uVa
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@@ -60,17 +74,24 @@ github.com/cespare/xxhash/v2 v2.1.1/go.mod h1:VGX0DQ3Q6kWi7AoAeZDth3/j3BFtOZR5XL
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@@ -96,15 +126,22 @@ github.com/ghodss/yaml v1.0.0/go.mod h1:4dBDuWmgqj2HViK6kFavaiC9ZROes6MMH2rRYeME
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@@ -117,9 +154,12 @@ github.com/golang/protobuf v1.4.0-rc.1.0.20200221234624-67d41d38c208/go.mod h1:x
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@@ -129,11 +169,14 @@ github.com/google/go-cmp v0.3.0/go.mod h1:8QqcDgzrUqlUb/G2PQTWiueGozuR1884gddMyw
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@@ -141,12 +184,20 @@ github.com/googleapis/gax-go/v2 v2.0.4/go.mod h1:0Wqv26UfaUD9n4G6kQubkQ+KchISgw+
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@@ -157,6 +208,7 @@ github.com/hashicorp/go-sockaddr v1.0.0/go.mod h1:7Xibr9yA9JjQq1JpNB2Vw7kxv8xerX
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@@ -167,23 +219,30 @@ github.com/hashicorp/mdns v1.0.0/go.mod h1:tL+uN++7HEJ6SQLQ2/p+z2pH24WQKWjBPkE0m
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@@ -191,6 +250,9 @@ github.com/kr/pretty v0.2.0/go.mod h1:ipq/a2n7PKx3OHsz4KJII5eveXtPO4qwEXGdVfWzfn
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@@ -198,9 +260,11 @@ github.com/mattn/go-colorable v0.0.9/go.mod h1:9vuHe8Xs5qXnSaW/c/ABM9alt+Vo+STaO
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@@ -305,15 +410,20 @@ github.com/spf13/afero v1.1.2 h1:m8/z1t7/fwjysjQRYbP0RD+bUIF/8tJwPdEZsI83ACI=
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@@ -324,13 +434,15 @@ github.com/stretchr/testify v1.6.1/go.mod h1:6Fq8oRcR53rry900zMqJjRRixrwX3KX962/
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@@ -339,17 +451,25 @@ github.com/yuin/gopher-lua v0.0.0-20191128022950-c6266f4fe8d7/go.mod h1:gqRgreBU
 go.etcd.io/bbolt v1.3.2/go.mod h1:IbVyRI1SCnLcuJnV2u8VeU0CEYM7e686BmAb1XKL+uU=
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+go.opencensus.io v0.20.1/go.mod h1:6WKK9ahsWS3RSO+PY9ZHZUfv2irvY6gN279GOPZjmmk=
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@@ -361,6 +481,7 @@ golang.org/x/crypto v0.0.0-20190510104115-cbcb75029529/go.mod h1:yigFU9vqHzYiE8U
 golang.org/x/crypto v0.0.0-20190605123033-f99c8df09eb5/go.mod h1:yigFU9vqHzYiE8UmvKecakEJjdnWj3jj499lnFckfCI=
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@@ -391,6 +512,7 @@ golang.org/x/net v0.0.0-20181114220301-adae6a3d119a/go.mod h1:mL1N/T3taQHkDXs73r
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@@ -399,9 +521,12 @@ golang.org/x/net v0.0.0-20190503192946-f4e77d36d62c/go.mod h1:t9HGtf8HONx5eT2rtn
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@@ -418,6 +543,7 @@ golang.org/x/sys v0.0.0-20180909124046-d0be0721c37e/go.mod h1:STP8DvDyc/dI5b8T5h
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@@ -430,23 +556,35 @@ golang.org/x/sys v0.0.0-20190507160741-ecd444e8653b/go.mod h1:h1NjWce9XRLGQEsW7w
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 golang.org/x/sys v0.0.0-20200106162015-b016eb3dc98e/go.mod h1:h1NjWce9XRLGQEsW7wpKNCjG9DtNlClVuFLEZdDNbEs=
 golang.org/x/sys v0.0.0-20200202164722-d101bd2416d5/go.mod h1:h1NjWce9XRLGQEsW7wpKNCjG9DtNlClVuFLEZdDNbEs=
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 golang.org/x/sys v0.0.0-20200602225109-6fdc65e7d980 h1:OjiUf46hAmXblsZdnoSXsEUSKU8r1UEzcL5RVZ4gO9Y=
 golang.org/x/sys v0.0.0-20200602225109-6fdc65e7d980/go.mod h1:h1NjWce9XRLGQEsW7wpKNCjG9DtNlClVuFLEZdDNbEs=
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 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=
 golang.org/x/text v0.3.2/go.mod h1:bEr9sfX3Q8Zfm5fL9x+3itogRgK3+ptLWKqgva+5dAk=
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 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=
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 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=
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 golang.org/x/tools v0.0.0-20180917221912-90fa682c2a6e/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=
@@ -466,18 +604,21 @@ golang.org/x/tools v0.0.0-20191012152004-8de300cfc20a/go.mod h1:b+2E5dAYhXwXZwtn
 golang.org/x/tools v0.0.0-20191029041327-9cc4af7d6b2c/go.mod h1:b+2E5dAYhXwXZwtnZ6UAqBI28+e2cm9otk0dWdXHAEo=
 golang.org/x/tools v0.0.0-20191029190741-b9c20aec41a5/go.mod h1:b+2E5dAYhXwXZwtnZ6UAqBI28+e2cm9otk0dWdXHAEo=
 golang.org/x/tools v0.0.0-20191112195655-aa38f8e97acc/go.mod h1:b+2E5dAYhXwXZwtnZ6UAqBI28+e2cm9otk0dWdXHAEo=
+golang.org/x/tools v0.0.0-20200103221440-774c71fcf114/go.mod h1:TB2adYChydJhpapKDTa4BR/hXlZSLoq2Wpct/0txZ28=
 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 v0.3.1/go.mod h1:6wY9I6uQWHQ8EM57III9mq/AjF+i8G65rmVagqKMtkk=
 google.golang.org/api v0.4.0/go.mod h1:8k5glujaEP+g9n7WNsDg8QP6cUVNI86fCNMcbazEtwE=
 google.golang.org/api v0.7.0/go.mod h1:WtwebWUNSVBH/HAw79HIFXZNqEvBhG+Ra+ax0hx3E3M=
 google.golang.org/api v0.8.0/go.mod h1:o4eAsZoiT+ibD93RtjEohWalFOjRDx6CVaqeizhEnKg=
 google.golang.org/api v0.9.0/go.mod h1:o4eAsZoiT+ibD93RtjEohWalFOjRDx6CVaqeizhEnKg=
 google.golang.org/api v0.13.0/go.mod h1:iLdEw5Ide6rF15KTC1Kkl0iskquN2gFfn9o9XIsbkAI=
 google.golang.org/appengine v1.1.0/go.mod h1:EbEs0AVv82hx2wNQdGPgUI5lhzA/G0D9YwlJXL52JkM=
+google.golang.org/appengine v1.2.0/go.mod h1:xpcJRLb0r/rnEns0DIKYYv+WjYCduHsrkT7/EB5XEv4=
 google.golang.org/appengine v1.4.0/go.mod h1:xpcJRLb0r/rnEns0DIKYYv+WjYCduHsrkT7/EB5XEv4=
 google.golang.org/appengine v1.5.0/go.mod h1:xpcJRLb0r/rnEns0DIKYYv+WjYCduHsrkT7/EB5XEv4=
 google.golang.org/appengine v1.6.1/go.mod h1:i06prIuMbXzDqacNJfV5OdTW448YApPu5ww/cMBSeb0=
@@ -486,46 +627,68 @@ google.golang.org/genproto v0.0.0-20190307195333-5fe7a883aa19/go.mod h1:VzzqZJRn
 google.golang.org/genproto v0.0.0-20190418145605-e7d98fc518a7/go.mod h1:VzzqZJRnGkLBvHegQrXjBqPurQTc5/KpmUdxsrq26oE=
 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 v0.0.0-20190530194941-fb225487d101/go.mod h1:z3L6/3dTEVtUr6QSP8miRzeRqwQOioJ9I66odjN4I7s=
 google.golang.org/genproto v0.0.0-20190801165951-fa694d86fc64/go.mod h1:DMBHOl98Agz4BDEuKkezgsaosCRResVns1a3J2ZsMNc=
 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=
 google.golang.org/genproto v0.0.0-20191108220845-16a3f7862a1a/go.mod h1:n3cpQtvxv34hfy77yVDNjmbRyujviMdxYliBSkLhpCc=
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+gopkg.in/yaml.v2 v2.3.0 h1:clyUAQHOM3G0M3f5vQj7LuJrETvjVot3Z5el9nffUtU=
+gopkg.in/yaml.v2 v2.3.0/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 v0.0.0-20180728063816-88497007e858/go.mod h1:rf3lG4BRIbNafJWhAfAdb/ePZxsR/4RtNHQocxwk9r4=
 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=
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@@ -533,3 +696,5 @@ honnef.co/go/tools v0.0.0-20190523083050-ea95bdfd59fc/go.mod h1:rf3lG4BRIbNafJWh
 honnef.co/go/tools v0.0.1-2019.2.3 h1:3JgtbtFHMiCmsznwGVTUWbgGov+pVqnlf1dEJTNAXeM=
 honnef.co/go/tools v0.0.1-2019.2.3/go.mod h1:a3bituU0lyd329TUQxRnasdCoJDkEUEAqEt0JzvZhAg=
 rsc.io/binaryregexp v0.2.0/go.mod h1:qTv7/COck+e2FymRvadv62gMdZztPaShugOCi3I+8D8=
+sigs.k8s.io/yaml v1.1.0/go.mod h1:UJmg0vDUVViEyp3mgSv9WPwZCDxu4rQW1olrI1uml+o=
+sourcegraph.com/sourcegraph/appdash v0.0.0-20190731080439-ebfcffb1b5c0/go.mod h1:hI742Nqp5OhwiqlzhgfbWU4mW4yO10fP+LoT9WOswdU=

main.go

@@ -9,23 +9,23 @@ import (
 
 func newLogger(v *viper.Viper) *zap.Logger {
 	options := []logger.Option{
-		logger.WithLevel(v.GetString("logger.level")),
+		logger.WithLevel(v.GetString(cfgLoggerLevel)),
-		logger.WithTraceLevel(v.GetString("logger.trace_level")),
+		logger.WithTraceLevel(v.GetString(cfgLoggerTraceLevel)),
 
-		logger.WithFormat(v.GetString("logger.format")),
+		logger.WithFormat(v.GetString(cfgLoggerFormat)),
 
-		logger.WithSamplingInitial(v.GetInt("logger.sampling.initial")),
+		logger.WithSamplingInitial(v.GetInt(cfgLoggerSamplingInitial)),
-		logger.WithSamplingThereafter(v.GetInt("logger.sampling.thereafter")),
+		logger.WithSamplingThereafter(v.GetInt(cfgLoggerSamplingThereafter)),
 
-		logger.WithAppName(v.GetString("app_name")),
+		logger.WithAppName(v.GetString(cfgApplicationName)),
-		logger.WithAppVersion(v.GetString("app_version")),
+		logger.WithAppVersion(v.GetString(cfgApplicationVersion)),
 	}
 
-	if v.GetBool("logger.no_caller") {
+	if v.GetBool(cfgLoggerNoCaller) {
 		options = append(options, logger.WithoutCaller())
 	}
 
-	if v.GetBool("logger.no_disclaimer") {
+	if v.GetBool(cfgLoggerNoDisclaimer) {
 		options = append(options, logger.WithoutDisclaimer())
 	}
 

misc.go

@@ -3,4 +3,7 @@ package main
 var (
 	Build   = "now"
 	Version = "dev"
+
+	// TODO should be replaced with HTTP_GW
+	Prefix = "GW"
 )

receive.go

@@ -89,19 +89,34 @@ func (a *app) receiveFile(c *fasthttp.RequestCtx) {
 		disp = "attachment"
 	}
 
-	c.Response.Header.Set("Content-Length", strconv.FormatUint(obj.GetPayloadSize(), 10))
+	c.Response.Header.Set("Content-Length", strconv.FormatUint(obj.PayloadSize(), 10))
-	c.Response.Header.Set("x-object-id", obj.GetID().String())
+	c.Response.Header.Set("x-object-id", obj.ID().String())
-	c.Response.Header.Set("x-owner-id", obj.GetOwnerID().String())
+	c.Response.Header.Set("x-owner-id", obj.OwnerID().String())
-	c.Response.Header.Set("x-container-id", obj.GetContainerID().String())
+	c.Response.Header.Set("x-container-id", obj.ContainerID().String())
 
-	for _, attr := range obj.GetAttributes() {
+	for _, attr := range obj.Attributes() {
-		key := attr.GetKey()
+		key := attr.Key()
-		val := attr.GetValue()
+		val := attr.Value()
-		if key == object.AttributeFileName {
-			filename = val
-		}
 
 		c.Response.Header.Set("x-"+key, val)
+
+		switch key {
+		case object.AttributeFileName:
+			filename = val
+		case object.AttributeTimestamp:
+			value, err := strconv.ParseInt(val, 10, 64)
+			if err != nil {
+				a.log.Info("couldn't parse creation date",
+					zap.String("key", key),
+					zap.String("val", val),
+					zap.Error(err))
+				continue
+			}
+
+			c.Response.Header.Set("Last-Modified",
+				time.Unix(value, 0).Format(time.RFC1123))
+		}
+
 	}
 
 	c.SetContentType(writer.contentType)

settings.go

@@ -4,6 +4,7 @@ import (
 	"fmt"
 	"io"
 	"os"
+	"sort"
 	"strconv"
 	"strings"
 	"time"
@@ -28,14 +29,46 @@ const (
 
 	defaultKeepaliveTime    = 10 * time.Second
 	defaultKeepaliveTimeout = 10 * time.Second
+
+	// Logger:
+	cfgLoggerLevel              = "logger.level"
+	cfgLoggerFormat             = "logger.format"
+	cfgLoggerTraceLevel         = "logger.trace_level"
+	cfgLoggerNoCaller           = "logger.no_caller"
+	cfgLoggerNoDisclaimer       = "logger.no_disclaimer"
+	cfgLoggerSamplingInitial    = "logger.sampling.initial"
+	cfgLoggerSamplingThereafter = "logger.sampling.thereafter"
+
+	// Peers
+	cfgPeers = "peers"
+
+	// Application
+	cfgApplicationName      = "app.name"
+	cfgApplicationVersion   = "app.version"
+	cfgApplicationBuildTime = "app.build_time"
+
+	// command line args
+	cmdHelp    = "help"
+	cmdVersion = "version"
 )
 
+var ignore = map[string]struct{}{
+	cfgApplicationName:      {},
+	cfgApplicationVersion:   {},
+	cfgApplicationBuildTime: {},
+
+	cfgPeers: {},
+
+	cmdHelp:    {},
+	cmdVersion: {},
+}
+
 func (empty) Read([]byte) (int, error) { return 0, io.EOF }
 
 func settings() *viper.Viper {
 	v := viper.New()
 	v.AutomaticEnv()
-	v.SetEnvPrefix("GW")
+	v.SetEnvPrefix(Prefix)
 	v.SetConfigType("yaml")
 	v.SetEnvKeyReplacer(strings.NewReplacer(".", "_"))
 
@@ -46,8 +79,8 @@ func settings() *viper.Viper {
 	flags.Bool("pprof", false, "enable pprof")
 	flags.Bool("metrics", false, "enable prometheus")
 
-	help := flags.BoolP("help", "h", false, "show help")
+	help := flags.BoolP(cmdHelp, "h", false, "show help")
-	version := flags.BoolP("version", "v", false, "show version")
+	version := flags.BoolP(cmdVersion, "v", false, "show version")
 
 	flags.String("key", generated, `"`+generated+`" to generate key, path to private key file, hex string or wif`)
 
@@ -62,19 +95,19 @@ func settings() *viper.Viper {
 	peers := flags.StringArrayP("peers", "p", nil, "NeoFS nodes")
 
 	// set prefers:
-	v.Set("app.name", "neofs-gw")
+	v.Set(cfgApplicationName, "neofs-http-gw")
-	v.Set("app.version", Version)
+	v.Set(cfgApplicationVersion, Version)
 
 	// set defaults:
 
 	// logger:
-	v.SetDefault("logger.level", "debug")
+	v.SetDefault(cfgLoggerLevel, "debug")
-	v.SetDefault("logger.format", "console")
+	v.SetDefault(cfgLoggerFormat, "console")
-	v.SetDefault("logger.trace_level", "fatal")
+	v.SetDefault(cfgLoggerTraceLevel, "panic")
-	v.SetDefault("logger.no_caller", false)
+	v.SetDefault(cfgLoggerNoCaller, false)
-	v.SetDefault("logger.no_disclaimer", true)
+	v.SetDefault(cfgLoggerNoDisclaimer, true)
-	v.SetDefault("logger.sampling.initial", 1000)
+	v.SetDefault(cfgLoggerSamplingInitial, 1000)
-	v.SetDefault("logger.sampling.thereafter", 1000)
+	v.SetDefault(cfgLoggerSamplingThereafter, 1000)
 
 	// keepalive:
 	// If set below 10s, a minimum value of 10s will be used instead.
@@ -105,6 +138,29 @@ func settings() *viper.Viper {
 	case help != nil && *help:
 		fmt.Printf("NeoFS HTTP Gateway %s (%s)\n", Version, Build)
 		flags.PrintDefaults()
+
+		fmt.Println()
+		fmt.Println("Default environments:")
+		fmt.Println()
+		keys := v.AllKeys()
+		sort.Strings(keys)
+
+		for i := range keys {
+			if _, ok := ignore[keys[i]]; ok {
+				continue
+			}
+
+			k := strings.Replace(keys[i], ".", "_", -1)
+			fmt.Printf("%s_%s = %v\n", Prefix, strings.ToUpper(k), v.Get(keys[i]))
+		}
+
+		fmt.Println()
+		fmt.Println("Peers preset:")
+		fmt.Println()
+
+		fmt.Printf("%s_%s_[N]_ADDRESS = string\n", Prefix, strings.ToUpper(cfgPeers))
+		fmt.Printf("%s_%s_[N]_WEIGHT = 0..1 (float)\n", Prefix, strings.ToUpper(cfgPeers))
+
 		os.Exit(0)
 	case version != nil && *version:
 		fmt.Printf("NeoFS HTTP Gateway %s (%s)\n", Version, Build)
@@ -115,8 +171,8 @@ func settings() *viper.Viper {
 
 	if peers != nil && len(*peers) > 0 {
 		for i := range *peers {
-			v.SetDefault("peers."+strconv.Itoa(i)+".address", (*peers)[i])
+			v.SetDefault(cfgPeers+"."+strconv.Itoa(i)+".address", (*peers)[i])
-			v.SetDefault("peers."+strconv.Itoa(i)+".weight", 1)
+			v.SetDefault(cfgPeers+"."+strconv.Itoa(i)+".weight", 1)
 		}
 	}