[#172] Convert handler config to interface

Signed-off-by: Marina Biryukova <m.biryukova@yadro.com>

api/handler/api.go

@@ -21,7 +21,7 @@ type (
 		log         *zap.Logger
 		obj         layer.Client
 		notificator Notificator
-		cfg         *Config
+		cfg         Config
 	}
 
 	Notificator interface {
@@ -30,29 +30,17 @@ type (
 	}
 
 	// Config contains data which handler needs to keep.
-	Config struct {
+	Config interface {
-		Policy                     PlacementPolicy
-		XMLDecoder                 XMLDecoderProvider
-		DefaultMaxAge              int
-		NotificatorEnabled         bool
-		ResolveZoneList            []string
-		IsResolveListAllow         bool // True if ResolveZoneList contains allowed zones
-		CompleteMultipartKeepalive time.Duration
-		Kludge                     KludgeSettings
-	}
-
-	PlacementPolicy interface {
 		DefaultPlacementPolicy() netmap.PlacementPolicy
 		PlacementPolicy(string) (netmap.PlacementPolicy, bool)
 		CopiesNumbers(string) ([]uint32, bool)
 		DefaultCopiesNumbers() []uint32
-	}
-
-	XMLDecoderProvider interface {
 		NewCompleteMultipartDecoder(io.Reader) *xml.Decoder
-	}
+		DefaultMaxAge() int
-
+		NotificatorEnabled() bool
-	KludgeSettings interface {
+		ResolveZoneList() []string
+		IsResolveListAllow() bool
+		CompleteMultipartKeepalive() time.Duration
 		BypassContentEncodingInChunks() bool
 	}
 )
@@ -60,7 +48,7 @@ type (
 var _ api.Handler = (*handler)(nil)
 
 // New creates new api.Handler using given logger and client.
-func New(log *zap.Logger, obj layer.Client, notificator Notificator, cfg *Config) (api.Handler, error) {
+func New(log *zap.Logger, obj layer.Client, notificator Notificator, cfg Config) (api.Handler, error) {
 	switch {
 	case obj == nil:
 		return nil, errors.New("empty FrostFS Object Layer")
@@ -68,7 +56,7 @@ func New(log *zap.Logger, obj layer.Client, notificator Notificator, cfg *Config
 		return nil, errors.New("empty logger")
 	}
 
-	if !cfg.NotificatorEnabled {
+	if !cfg.NotificatorEnabled() {
 		log.Warn(logs.NotificatorIsDisabledS3WontProduceNotificationEvents)
 	} else if notificator == nil {
 		return nil, errors.New("empty notificator")
@@ -96,12 +84,12 @@ func (h *handler) pickCopiesNumbers(metadata map[string]string, locationConstrai
 		return result, nil
 	}
 
-	copiesNumbers, ok := h.cfg.Policy.CopiesNumbers(locationConstraint)
+	copiesNumbers, ok := h.cfg.CopiesNumbers(locationConstraint)
 	if ok {
 		return copiesNumbers, nil
 	}
 
-	return h.cfg.Policy.DefaultCopiesNumbers(), nil
+	return h.cfg.DefaultCopiesNumbers(), nil
 }
 
 func parseCopiesNumbers(copiesNumbersStr string) ([]uint32, error) {

api/handler/api_test.go

@@ -12,11 +12,9 @@ func TestCopiesNumberPicker(t *testing.T) {
 	locationConstraint2 := "two"
 	locationConstraints[locationConstraint1] = []uint32{2, 3, 4}
 
-	config := &Config{
+	config := &configMock{
-		Policy: &placementPolicyMock{
 		copiesNumbers:        locationConstraints,
 		defaultCopiesNumbers: []uint32{1},
-		},
 	}
 	h := handler{
 		cfg: config,

api/handler/cors.go

@@ -194,7 +194,7 @@ func (h *handler) Preflight(w http.ResponseWriter, r *http.Request) {
 						if rule.MaxAgeSeconds > 0 || rule.MaxAgeSeconds == -1 {
 							w.Header().Set(api.AccessControlMaxAge, strconv.Itoa(rule.MaxAgeSeconds))
 						} else {
-							w.Header().Set(api.AccessControlMaxAge, strconv.Itoa(h.cfg.DefaultMaxAge))
+							w.Header().Set(api.AccessControlMaxAge, strconv.Itoa(h.cfg.DefaultMaxAge()))
 						}
 						if o != wildcard {
 							w.Header().Set(api.AccessControlAllowCredentials, "true")

api/handler/handlers_test.go

@@ -37,7 +37,7 @@ type handlerContext struct {
 	tp      *layer.TestFrostFS
 	tree    *tree.Tree
 	context context.Context
-	kludge  *kludgeSettingsMock
+	config  *configMock
 
 	layerFeatures *layer.FeatureSettingsMock
 }
@@ -58,41 +58,56 @@ func (hc *handlerContext) Context() context.Context {
 	return hc.context
 }
 
-type placementPolicyMock struct {
+type configMock struct {
 	defaultPolicy                 netmap.PlacementPolicy
 	copiesNumbers                 map[string][]uint32
 	defaultCopiesNumbers          []uint32
-}
-
-func (p *placementPolicyMock) DefaultPlacementPolicy() netmap.PlacementPolicy {
-	return p.defaultPolicy
-}
-
-func (p *placementPolicyMock) PlacementPolicy(string) (netmap.PlacementPolicy, bool) {
-	return netmap.PlacementPolicy{}, false
-}
-
-func (p *placementPolicyMock) CopiesNumbers(locationConstraint string) ([]uint32, bool) {
-	result, ok := p.copiesNumbers[locationConstraint]
-	return result, ok
-}
-
-func (p *placementPolicyMock) DefaultCopiesNumbers() []uint32 {
-	return p.defaultCopiesNumbers
-}
-
-type xmlDecoderProviderMock struct{}
-
-func (p *xmlDecoderProviderMock) NewCompleteMultipartDecoder(r io.Reader) *xml.Decoder {
-	return xml.NewDecoder(r)
-}
-
-type kludgeSettingsMock struct {
 	bypassContentEncodingInChunks bool
 }
 
-func (k *kludgeSettingsMock) BypassContentEncodingInChunks() bool {
+func (c *configMock) DefaultPlacementPolicy() netmap.PlacementPolicy {
-	return k.bypassContentEncodingInChunks
+	return c.defaultPolicy
+}
+
+func (c *configMock) PlacementPolicy(string) (netmap.PlacementPolicy, bool) {
+	return netmap.PlacementPolicy{}, false
+}
+
+func (c *configMock) CopiesNumbers(locationConstraint string) ([]uint32, bool) {
+	result, ok := c.copiesNumbers[locationConstraint]
+	return result, ok
+}
+
+func (c *configMock) DefaultCopiesNumbers() []uint32 {
+	return c.defaultCopiesNumbers
+}
+
+func (c *configMock) NewCompleteMultipartDecoder(r io.Reader) *xml.Decoder {
+	return xml.NewDecoder(r)
+}
+
+func (c *configMock) BypassContentEncodingInChunks() bool {
+	return c.bypassContentEncodingInChunks
+}
+
+func (c *configMock) DefaultMaxAge() int {
+	return 0
+}
+
+func (c *configMock) NotificatorEnabled() bool {
+	return false
+}
+
+func (c *configMock) ResolveZoneList() []string {
+	return []string{}
+}
+
+func (c *configMock) IsResolveListAllow() bool {
+	return false
+}
+
+func (c *configMock) CompleteMultipartKeepalive() time.Duration {
+	return time.Duration(0)
 }
 
 func prepareHandlerContext(t *testing.T) *handlerContext {
@@ -139,16 +154,13 @@ func prepareHandlerContextBase(t *testing.T, minCache bool) *handlerContext {
 	err = pp.DecodeString("REP 1")
 	require.NoError(t, err)
 
-	kludge := &kludgeSettingsMock{}
+	cfg := &configMock{
-
+		defaultPolicy: pp,
+	}
 	h := &handler{
 		log: l,
 		obj: layer.NewLayer(l, tp, layerCfg),
-		cfg: &Config{
+		cfg: cfg,
-			Policy:     &placementPolicyMock{defaultPolicy: pp},
-			XMLDecoder: &xmlDecoderProviderMock{},
-			Kludge:     kludge,
-		},
 	}
 
 	return &handlerContext{
@@ -158,7 +170,7 @@ func prepareHandlerContextBase(t *testing.T, minCache bool) *handlerContext {
 		tp:      tp,
 		tree:    treeMock,
 		context: middleware.SetBoxData(context.Background(), newTestAccessBox(t, key)),
-		kludge:  kludge,
+		config:  cfg,
 
 		layerFeatures: features,
 	}

api/handler/head.go

@@ -135,7 +135,7 @@ func (h *handler) HeadBucketHandler(w http.ResponseWriter, r *http.Request) {
 	w.Header().Set(api.ContainerID, bktInfo.CID.EncodeToString())
 	w.Header().Set(api.AmzBucketRegion, bktInfo.LocationConstraint)
 
-	if isAvailableToResolve(bktInfo.Zone, h.cfg.ResolveZoneList, h.cfg.IsResolveListAllow) {
+	if isAvailableToResolve(bktInfo.Zone, h.cfg.ResolveZoneList(), h.cfg.IsResolveListAllow()) {
 		w.Header().Set(api.ContainerName, bktInfo.Name)
 		w.Header().Set(api.ContainerZone, bktInfo.Zone)
 	}

api/handler/multipart_upload.go

@@ -406,7 +406,7 @@ func (h *handler) CompleteMultipartUploadHandler(w http.ResponseWriter, r *http.
 	)
 
 	reqBody := new(CompleteMultipartUpload)
-	if err = h.cfg.XMLDecoder.NewCompleteMultipartDecoder(r.Body).Decode(reqBody); err != nil {
+	if err = h.cfg.NewCompleteMultipartDecoder(r.Body).Decode(reqBody); err != nil {
 		h.logAndSendError(w, "could not read complete multipart upload xml", reqInfo,
 			errors.GetAPIError(errors.ErrMalformedXML), additional...)
 		return
@@ -424,7 +424,7 @@ func (h *handler) CompleteMultipartUploadHandler(w http.ResponseWriter, r *http.
 	// Next operations might take some time, so we want to keep client's
 	// connection alive. To do so, gateway sends periodic white spaces
 	// back to the client the same way as Amazon S3 service does.
-	stopPeriodicResponseWriter := periodicXMLWriter(w, h.cfg.CompleteMultipartKeepalive)
+	stopPeriodicResponseWriter := periodicXMLWriter(w, h.cfg.CompleteMultipartKeepalive())
 
 	// Start complete multipart upload which may take some time to fetch object
 	// and re-upload it part by part.

api/handler/notifications.go

@@ -155,7 +155,7 @@ func (h *handler) GetBucketNotificationHandler(w http.ResponseWriter, r *http.Re
 }
 
 func (h *handler) sendNotifications(ctx context.Context, p *SendNotificationParams) error {
-	if !h.cfg.NotificatorEnabled {
+	if !h.cfg.NotificatorEnabled() {
 		return nil
 	}
 
@@ -198,7 +198,7 @@ func (h *handler) checkBucketConfiguration(ctx context.Context, conf *data.Notif
 			return
 		}
 
-		if h.cfg.NotificatorEnabled {
+		if h.cfg.NotificatorEnabled() {
 			if err = h.notificator.SendTestNotification(q.QueueArn, r.BucketName, r.RequestID, r.Host, layer.TimeNow(ctx)); err != nil {
 				return
 			}

api/handler/put.go

@@ -348,7 +348,7 @@ func (h *handler) getBodyReader(r *http.Request) (io.ReadCloser, error) {
 	}
 	r.Header.Set(api.ContentEncoding, strings.Join(resultContentEncoding, ","))
 
-	if !chunkedEncoding && !h.cfg.Kludge.BypassContentEncodingInChunks() {
+	if !chunkedEncoding && !h.cfg.BypassContentEncodingInChunks() {
 		return nil, fmt.Errorf("%w: request is not chunk encoded, encodings '%s'",
 			errors.GetAPIError(errors.ErrInvalidEncodingMethod), strings.Join(encodings, ","))
 	}
@@ -797,7 +797,7 @@ func (h *handler) CreateBucketHandler(w http.ResponseWriter, r *http.Request) {
 }
 
 func (h handler) setPolicy(prm *layer.CreateBucketParams, locationConstraint string, userPolicies []*accessbox.ContainerPolicy) error {
-	prm.Policy = h.cfg.Policy.DefaultPlacementPolicy()
+	prm.Policy = h.cfg.DefaultPlacementPolicy()
 	prm.LocationConstraint = locationConstraint
 
 	if locationConstraint == "" {
@@ -811,7 +811,7 @@ func (h handler) setPolicy(prm *layer.CreateBucketParams, locationConstraint str
 		}
 	}
 
-	if policy, ok := h.cfg.Policy.PlacementPolicy(locationConstraint); ok {
+	if policy, ok := h.cfg.PlacementPolicy(locationConstraint); ok {
 		prm.Policy = policy
 		return nil
 	}

api/handler/put_test.go

@@ -230,7 +230,7 @@ func TestPutChunkedTestContentEncoding(t *testing.T) {
 	hc.Handler().PutObjectHandler(w, req)
 	assertS3Error(t, w, s3errors.GetAPIError(s3errors.ErrInvalidEncodingMethod))
 
-	hc.kludge.bypassContentEncodingInChunks = true
+	hc.config.bypassContentEncodingInChunks = true
 	w, req, _ = getChunkedRequest(hc.context, t, bktName, objName)
 	req.Header.Set(api.ContentEncoding, "gzip")
 	hc.Handler().PutObjectHandler(w, req)

cmd/s3-gw/app.go

@@ -3,13 +3,14 @@ package main
 import (
 	"context"
 	"encoding/hex"
+	"encoding/xml"
 	"fmt"
+	"io"
 	"net/http"
 	"os"
 	"os/signal"
 	"runtime/debug"
 	"sync"
-	"sync/atomic"
 	"syscall"
 	"time"
 
@@ -27,7 +28,6 @@ import (
 	"git.frostfs.info/TrueCloudLab/frostfs-s3-gw/internal/logs"
 	"git.frostfs.info/TrueCloudLab/frostfs-s3-gw/internal/version"
 	"git.frostfs.info/TrueCloudLab/frostfs-s3-gw/internal/wallet"
-	"git.frostfs.info/TrueCloudLab/frostfs-s3-gw/internal/xml"
 	"git.frostfs.info/TrueCloudLab/frostfs-s3-gw/metrics"
 	"git.frostfs.info/TrueCloudLab/frostfs-s3-gw/pkg/service/tree"
 	"git.frostfs.info/TrueCloudLab/frostfs-sdk-go/netmap"
@@ -42,6 +42,8 @@ import (
 	"google.golang.org/grpc"
 )
 
+const awsDefaultNamespace = "http://s3.amazonaws.com/doc/2006-03-01/"
+
 type (
 	// App is the main application structure.
 	App struct {
@@ -68,11 +70,21 @@ type (
 
 	appSettings struct {
 		logLevel                   zap.AtomicLevel
-		policies                      *placementPolicy
-		xmlDecoder                    *xml.DecoderProvider
 		maxClient                  maxClientsConfig
-		bypassContentEncodingInChunks atomic.Bool
+		defaultMaxAge              int
-		clientCut                     atomic.Bool
+		notificatorEnabled         bool
+		resolveZoneList            []string
+		isResolveListAllow         bool // True if ResolveZoneList contains allowed zones
+		completeMultipartKeepalive time.Duration
+
+		mu                               sync.RWMutex
+		defaultPolicy                    netmap.PlacementPolicy
+		regionMap                        map[string]netmap.PlacementPolicy
+		copiesNumbers                    map[string][]uint32
+		defaultCopiesNumbers             []uint32
+		defaultXMLNSForCompleteMultipart bool
+		bypassContentEncodingInChunks    bool
+		clientCut                        bool
 	}
 
 	maxClientsConfig struct {
@@ -84,14 +96,6 @@ type (
 		logger *zap.Logger
 		lvl    zap.AtomicLevel
 	}
-
-	placementPolicy struct {
-		mu                   sync.RWMutex
-		defaultPolicy        netmap.PlacementPolicy
-		regionMap            map[string]netmap.PlacementPolicy
-		copiesNumbers        map[string][]uint32
-		defaultCopiesNumbers []uint32
-	}
 )
 
 func newApp(ctx context.Context, log *Logger, v *viper.Viper) *App {
@@ -169,31 +173,129 @@ func (a *App) initLayer(ctx context.Context) {
 func newAppSettings(log *Logger, v *viper.Viper) *appSettings {
 	settings := &appSettings{
 		logLevel:                         log.lvl,
-		policies:   newPlacementPolicy(log.logger, v),
-		xmlDecoder: xml.NewDecoderProvider(v.GetBool(cfgKludgeUseDefaultXMLNSForCompleteMultipartUpload)),
 		maxClient:                        newMaxClients(v),
+		defaultXMLNSForCompleteMultipart: v.GetBool(cfgKludgeUseDefaultXMLNSForCompleteMultipartUpload),
+		defaultMaxAge:                    fetchDefaultMaxAge(v, log.logger),
+		notificatorEnabled:               v.GetBool(cfgEnableNATS),
+		completeMultipartKeepalive:       v.GetDuration(cfgKludgeCompleteMultipartUploadKeepalive),
+	}
+
+	settings.resolveZoneList = v.GetStringSlice(cfgResolveBucketAllow)
+	settings.isResolveListAllow = len(settings.resolveZoneList) > 0
+	if !settings.isResolveListAllow {
+		settings.resolveZoneList = v.GetStringSlice(cfgResolveBucketDeny)
 	}
 
 	settings.setBypassContentEncodingInChunks(v.GetBool(cfgKludgeBypassContentEncodingCheckInChunks))
 	settings.setClientCut(v.GetBool(cfgClientCut))
+	settings.initPlacementPolicy(log.logger, v)
 
 	return settings
 }
 
 func (s *appSettings) BypassContentEncodingInChunks() bool {
-	return s.bypassContentEncodingInChunks.Load()
+	s.mu.RLock()
+	defer s.mu.RUnlock()
+	return s.bypassContentEncodingInChunks
 }
 
 func (s *appSettings) setBypassContentEncodingInChunks(bypass bool) {
-	s.bypassContentEncodingInChunks.Store(bypass)
+	s.mu.Lock()
+	s.bypassContentEncodingInChunks = bypass
+	s.mu.Unlock()
 }
 
 func (s *appSettings) ClientCut() bool {
-	return s.clientCut.Load()
+	s.mu.RLock()
+	defer s.mu.RUnlock()
+	return s.clientCut
 }
 
 func (s *appSettings) setClientCut(clientCut bool) {
-	s.clientCut.Store(clientCut)
+	s.mu.Lock()
+	s.clientCut = clientCut
+	s.mu.Unlock()
+}
+
+func (s *appSettings) initPlacementPolicy(l *zap.Logger, v *viper.Viper) {
+	defaultPolicy := fetchDefaultPolicy(l, v)
+	regionMap := fetchRegionMappingPolicies(l, v)
+	defaultCopies := fetchDefaultCopiesNumbers(l, v)
+	copiesNumbers := fetchCopiesNumbers(l, v)
+
+	s.mu.Lock()
+	defer s.mu.Unlock()
+
+	s.defaultPolicy = defaultPolicy
+	s.regionMap = regionMap
+	s.defaultCopiesNumbers = defaultCopies
+	s.copiesNumbers = copiesNumbers
+}
+
+func (s *appSettings) DefaultPlacementPolicy() netmap.PlacementPolicy {
+	s.mu.RLock()
+	defer s.mu.RUnlock()
+	return s.defaultPolicy
+}
+
+func (s *appSettings) PlacementPolicy(name string) (netmap.PlacementPolicy, bool) {
+	s.mu.RLock()
+	policy, ok := s.regionMap[name]
+	s.mu.RUnlock()
+
+	return policy, ok
+}
+
+func (s *appSettings) CopiesNumbers(locationConstraint string) ([]uint32, bool) {
+	s.mu.RLock()
+	copiesNumbers, ok := s.copiesNumbers[locationConstraint]
+	s.mu.RUnlock()
+
+	return copiesNumbers, ok
+}
+
+func (s *appSettings) DefaultCopiesNumbers() []uint32 {
+	s.mu.RLock()
+	defer s.mu.RUnlock()
+	return s.defaultCopiesNumbers
+}
+
+func (s *appSettings) NewCompleteMultipartDecoder(r io.Reader) *xml.Decoder {
+	dec := xml.NewDecoder(r)
+
+	s.mu.RLock()
+	if s.defaultXMLNSForCompleteMultipart {
+		dec.DefaultSpace = awsDefaultNamespace
+	}
+	s.mu.RUnlock()
+
+	return dec
+}
+
+func (s *appSettings) useDefaultNamespaceForCompleteMultipart(useDefaultNamespace bool) {
+	s.mu.Lock()
+	s.defaultXMLNSForCompleteMultipart = useDefaultNamespace
+	s.mu.Unlock()
+}
+
+func (s *appSettings) DefaultMaxAge() int {
+	return s.defaultMaxAge
+}
+
+func (s *appSettings) NotificatorEnabled() bool {
+	return s.notificatorEnabled
+}
+
+func (s *appSettings) ResolveZoneList() []string {
+	return s.resolveZoneList
+}
+
+func (s *appSettings) IsResolveListAllow() bool {
+	return s.isResolveListAllow
+}
+
+func (s *appSettings) CompleteMultipartKeepalive() time.Duration {
+	return s.completeMultipartKeepalive
 }
 
 func (a *App) initAPI(ctx context.Context) {
@@ -348,55 +450,6 @@ func getPools(ctx context.Context, logger *zap.Logger, cfg *viper.Viper) (*pool.
 	return p, treePool, key
 }
 
-func newPlacementPolicy(l *zap.Logger, v *viper.Viper) *placementPolicy {
-	var policies placementPolicy
-	policies.update(l, v)
-	return &policies
-}
-
-func (p *placementPolicy) DefaultPlacementPolicy() netmap.PlacementPolicy {
-	p.mu.RLock()
-	defer p.mu.RUnlock()
-	return p.defaultPolicy
-}
-
-func (p *placementPolicy) PlacementPolicy(name string) (netmap.PlacementPolicy, bool) {
-	p.mu.RLock()
-	policy, ok := p.regionMap[name]
-	p.mu.RUnlock()
-
-	return policy, ok
-}
-
-func (p *placementPolicy) CopiesNumbers(locationConstraint string) ([]uint32, bool) {
-	p.mu.RLock()
-	copiesNumbers, ok := p.copiesNumbers[locationConstraint]
-	p.mu.RUnlock()
-
-	return copiesNumbers, ok
-}
-
-func (p *placementPolicy) DefaultCopiesNumbers() []uint32 {
-	p.mu.RLock()
-	defer p.mu.RUnlock()
-	return p.defaultCopiesNumbers
-}
-
-func (p *placementPolicy) update(l *zap.Logger, v *viper.Viper) {
-	defaultPolicy := fetchDefaultPolicy(l, v)
-	regionMap := fetchRegionMappingPolicies(l, v)
-	defaultCopies := fetchDefaultCopiesNumbers(l, v)
-	copiesNumbers := fetchCopiesNumbers(l, v)
-
-	p.mu.Lock()
-	defer p.mu.Unlock()
-
-	p.defaultPolicy = defaultPolicy
-	p.regionMap = regionMap
-	p.defaultCopiesNumbers = defaultCopies
-	p.copiesNumbers = copiesNumbers
-}
-
 func remove(list []string, element string) []string {
 	for i, item := range list {
 		if item == element {
@@ -531,9 +584,9 @@ func (a *App) updateSettings() {
 		a.settings.logLevel.SetLevel(lvl)
 	}
 
-	a.settings.policies.update(a.log, a.cfg)
+	a.settings.initPlacementPolicy(a.log, a.cfg)
 
-	a.settings.xmlDecoder.UseDefaultNamespaceForCompleteMultipart(a.cfg.GetBool(cfgKludgeUseDefaultXMLNSForCompleteMultipartUpload))
+	a.settings.useDefaultNamespaceForCompleteMultipart(a.cfg.GetBool(cfgKludgeUseDefaultXMLNSForCompleteMultipartUpload))
 	a.settings.setBypassContentEncodingInChunks(a.cfg.GetBool(cfgKludgeBypassContentEncodingCheckInChunks))
 	a.settings.setClientCut(a.cfg.GetBool(cfgClientCut))
 }
@@ -664,24 +717,8 @@ func getAccessBoxCacheConfig(v *viper.Viper, l *zap.Logger) *cache.Config {
 }
 
 func (a *App) initHandler() {
-	cfg := &handler.Config{
-		Policy:             a.settings.policies,
-		DefaultMaxAge:      fetchDefaultMaxAge(a.cfg, a.log),
-		NotificatorEnabled: a.cfg.GetBool(cfgEnableNATS),
-		XMLDecoder:         a.settings.xmlDecoder,
-	}
-
-	cfg.ResolveZoneList = a.cfg.GetStringSlice(cfgResolveBucketAllow)
-	cfg.IsResolveListAllow = len(cfg.ResolveZoneList) > 0
-	if !cfg.IsResolveListAllow {
-		cfg.ResolveZoneList = a.cfg.GetStringSlice(cfgResolveBucketDeny)
-	}
-
-	cfg.CompleteMultipartKeepalive = a.cfg.GetDuration(cfgKludgeCompleteMultipartUploadKeepalive)
-	cfg.Kludge = a.settings
-
 	var err error
-	a.api, err = handler.New(a.log, a.obj, a.nc, cfg)
+	a.api, err = handler.New(a.log, a.obj, a.nc, a.settings)
 	if err != nil {
 		a.log.Fatal(logs.CouldNotInitializeAPIHandler, zap.Error(err))
 	}

cmd/s3-gw/decoder_test.go

@@ -1,4 +1,4 @@
-package xml
+package main
 
 import (
 	"bytes"
@@ -35,44 +35,56 @@ func TestDefaultNamespace(t *testing.T) {
 `
 
 	for _, tc := range []struct {
-		provider *DecoderProvider
+		settings *appSettings
 		input    string
 		err      bool
 	}{
 		{
-			provider: NewDecoderProvider(false),
+			settings: &appSettings{
+				defaultXMLNSForCompleteMultipart: false,
+			},
 			input: xmlBodyWithNamespace,
 			err:   false,
 		},
 		{
-			provider: NewDecoderProvider(false),
+			settings: &appSettings{
+				defaultXMLNSForCompleteMultipart: false,
+			},
 			input: xmlBody,
 			err:   true,
 		},
 		{
-			provider: NewDecoderProvider(false),
+			settings: &appSettings{
+				defaultXMLNSForCompleteMultipart: false,
+			},
 			input: xmlBodyWithInvalidNamespace,
 			err:   true,
 		},
 		{
-			provider: NewDecoderProvider(true),
+			settings: &appSettings{
+				defaultXMLNSForCompleteMultipart: true,
+			},
 			input: xmlBodyWithNamespace,
 			err:   false,
 		},
 		{
-			provider: NewDecoderProvider(true),
+			settings: &appSettings{
+				defaultXMLNSForCompleteMultipart: true,
+			},
 			input: xmlBody,
 			err:   false,
 		},
 		{
-			provider: NewDecoderProvider(true),
+			settings: &appSettings{
+				defaultXMLNSForCompleteMultipart: true,
+			},
 			input: xmlBodyWithInvalidNamespace,
 			err:   true,
 		},
 	} {
 		t.Run("", func(t *testing.T) {
 			model := new(handler.CompleteMultipartUpload)
-			err := tc.provider.NewCompleteMultipartDecoder(bytes.NewBufferString(tc.input)).Decode(model)
+			err := tc.settings.NewCompleteMultipartDecoder(bytes.NewBufferString(tc.input)).Decode(model)
 			if tc.err {
 				require.Error(t, err)
 			} else {

internal/xml/decoder.go

@@ -1,38 +0,0 @@
-package xml
-
-import (
-	"encoding/xml"
-	"io"
-	"sync"
-)
-
-const awsDefaultNamespace = "http://s3.amazonaws.com/doc/2006-03-01/"
-
-type DecoderProvider struct {
-	mu                               sync.RWMutex
-	defaultXMLNSForCompleteMultipart bool
-}
-
-func NewDecoderProvider(defaultNamespace bool) *DecoderProvider {
-	return &DecoderProvider{
-		defaultXMLNSForCompleteMultipart: defaultNamespace,
-	}
-}
-
-func (d *DecoderProvider) NewCompleteMultipartDecoder(r io.Reader) *xml.Decoder {
-	dec := xml.NewDecoder(r)
-
-	d.mu.RLock()
-	if d.defaultXMLNSForCompleteMultipart {
-		dec.DefaultSpace = awsDefaultNamespace
-	}
-	d.mu.RUnlock()
-
-	return dec
-}
-
-func (d *DecoderProvider) UseDefaultNamespaceForCompleteMultipart(useDefaultNamespace bool) {
-	d.mu.Lock()
-	d.defaultXMLNSForCompleteMultipart = useDefaultNamespace
-	d.mu.Unlock()
-}