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

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

cmd/http-gw/app.go

@@ -94,7 +94,8 @@ type (
 		zipCompression          bool
 		clientCut               bool
 		returnIndexPage         bool
-		indexPageTemplate   string
+		indexPageS3Template     string
+		indexPageNativeTemplate string
 		bufferMaxSizeForPut     uint64
 		namespaceHeader         string
 		defaultNamespaces       []string
@@ -159,7 +160,7 @@ func newApp(ctx context.Context, opt ...Option) App {
 	a.initResolver()
 	a.initMetrics()
 	a.initTracing(ctx)
-	a.loadIndexPageTemplate()
+	a.loadIndexPageTemplates()
 
 	return a
 }
@@ -188,13 +189,22 @@ func (s *appSettings) IndexPageEnabled() bool {
 	return s.returnIndexPage
 }
 
-func (s *appSettings) IndexPageTemplate() string {
+func (s *appSettings) IndexPageS3Template() string {
 	s.mu.RLock()
 	defer s.mu.RUnlock()
-	if s.indexPageTemplate == "" {
+	if s.indexPageS3Template == "" {
 		return templates.DefaultIndexTemplate
 	}
-	return s.indexPageTemplate
+	return s.indexPageS3Template
+}
+
+func (s *appSettings) IndexPageNativeTemplate() string {
+	s.mu.RLock()
+	defer s.mu.RUnlock()
+	if s.indexPageNativeTemplate == "" {
+		return templates.DefaultIndexNativeTemplate
+	}
+	return s.indexPageNativeTemplate
 }
 
 func (s *appSettings) setZipCompression(val bool) {
@@ -209,30 +219,50 @@ func (s *appSettings) setReturnIndexPage(val bool) {
 	s.mu.Unlock()
 }
 
-func (s *appSettings) setIndexTemplate(val string) {
+func (s *appSettings) setIndexS3Template(val string) {
 	s.mu.Lock()
-	s.indexPageTemplate = val
+	s.indexPageS3Template = val
 	s.mu.Unlock()
 }
 
-func (a *app) loadIndexPageTemplate() {
+func (s *appSettings) setIndexNativeTemplate(val string) {
+	s.mu.Lock()
+	s.indexPageNativeTemplate = val
+	s.mu.Unlock()
+}
+
+func (a *app) loadIndexPageTemplates() {
 	if !a.settings.IndexPageEnabled() {
 		return
 	}
-	reader, err := os.Open(a.cfg.GetString(cfgIndexPageTemplatePath))
+
+	pathS3 := a.cfg.GetString(cfgIndexPageS3TemplatePath)
+	tmpl, err := a.readTemplate(pathS3)
 	if err != nil {
-		a.settings.setIndexTemplate("")
+		a.settings.setIndexS3Template("")
 		a.log.Warn(logs.FailedToReadIndexPageTemplate, zap.Error(err))
-		return
+	} else {
+		a.settings.setIndexS3Template(string(tmpl))
+		a.log.Info(logs.SetCustomIndexPageTemplate, zap.String("path", pathS3))
 	}
-	tmpl, err := io.ReadAll(reader)
+
+	pathNative := a.cfg.GetString(cfgIndexPageNativeTemplatePath)
+	tmpl, err = a.readTemplate(pathNative)
 	if err != nil {
-		a.settings.setIndexTemplate("")
+		a.settings.setIndexNativeTemplate("")
 		a.log.Warn(logs.FailedToReadIndexPageTemplate, zap.Error(err))
-		return
+	} else {
+		a.settings.setIndexNativeTemplate(string(tmpl))
+		a.log.Info(logs.SetCustomIndexPageTemplate, zap.String("path", pathNative))
 	}
-	a.settings.setIndexTemplate(string(tmpl))
-	a.log.Info(logs.SetCustomIndexPageTemplate)
+}
+
+func (a *app) readTemplate(path string) ([]byte, error) {
+	reader, err := os.Open(path)
+	if err != nil {
+		return nil, err
+	}
+	return io.ReadAll(reader)
 }
 
 func (s *appSettings) ClientCut() bool {
@@ -543,7 +573,7 @@ func (a *app) configReload(ctx context.Context) {
 
 	a.metrics.SetEnabled(a.cfg.GetBool(cfgPrometheusEnabled))
 	a.initTracing(ctx)
-	a.loadIndexPageTemplate()
+	a.loadIndexPageTemplates()
 	a.setHealthStatus()
 
 	a.log.Info(logs.SIGHUPConfigReloadCompleted)

cmd/http-gw/settings.go

@@ -63,7 +63,8 @@ const (
 	cfgReconnectInterval = "reconnect_interval"
 
 	cfgIndexPageEnabled            = "index_page.enabled"
-	cfgIndexPageTemplatePath = "index_page.template_path"
+	cfgIndexPageS3TemplatePath     = "index_page.template_path.s3"
+	cfgIndexPageNativeTemplatePath = "index_page.template_path.native"
 
 	// Web.
 	cfgWebReadBufferSize     = "web.read_buffer_size"
@@ -207,7 +208,8 @@ func settings() *viper.Viper {
 	v.SetDefault(cfgPoolErrorThreshold, defaultPoolErrorThreshold)
 
 	v.SetDefault(cfgIndexPageEnabled, false)
-	v.SetDefault(cfgIndexPageTemplatePath, "")
+	v.SetDefault(cfgIndexPageS3TemplatePath, "")
+	v.SetDefault(cfgIndexPageNativeTemplatePath, "")
 
 	// frostfs:
 	v.SetDefault(cfgBufferMaxSizeForPut, defaultBufferMaxSizeForPut)

docs/gate-configuration.md

@@ -351,15 +351,23 @@ resolve_bucket:
 
 # `index_page` section
 
-Parameters for index HTML-page output with S3-bucket or S3-subdir content for `Get object` request
+Parameters for index HTML-page output. Activates if `GetObject` request returns `not found`. Two
+index page modes available:
+
+* `s3` mode uses tree service for listing objects,
+* `native` sends requests to nodes via native protocol.
+  If request pass S3-bucket name instead of CID, `s3` mode will be used, otherwise `native`.
 
 ```yaml
 index_page:
   enabled: false
-  template_path: ""
+  template_path:
+    s3: ""
+    native: ""
 ```
 
 | Parameter              | Type     | SIGHUP reload | Default value | Description                                                                     |
-|-----------------|----------|---------------|---------------|---------------------------------------------------------------------------------|
+|------------------------|----------|---------------|---------------|---------------------------------------------------------------------------------|
 | `enabled`              | `bool`   | yes           | `false`       | Flag to enable index_page return if no object with specified S3-name was found. |
-| `template_path` | `string` | yes           | `""`          | Path to .gotmpl file with html template for index_page.                         |
+| `template_path.s3`     | `string` | yes           | `""`          | Path to .gotmpl file with html templates for S3 index_page.                     |
+| `template_path.native` | `string` | yes           | `""`          | Path to .gotmpl file with html templates for native index_page.                 |

internal/handler/browse.go

@@ -1,15 +1,21 @@
 package handler
 
 import (
+	"context"
 	"html/template"
 	"net/url"
 	"sort"
 	"strconv"
 	"strings"
+	"sync"
 	"time"
 
 	"git.frostfs.info/TrueCloudLab/frostfs-http-gw/internal/data"
+	"git.frostfs.info/TrueCloudLab/frostfs-http-gw/internal/logs"
 	"git.frostfs.info/TrueCloudLab/frostfs-http-gw/utils"
+	cid "git.frostfs.info/TrueCloudLab/frostfs-sdk-go/container/id"
+	"git.frostfs.info/TrueCloudLab/frostfs-sdk-go/object"
+	oid "git.frostfs.info/TrueCloudLab/frostfs-sdk-go/object/id"
 	"github.com/docker/go-units"
 	"github.com/valyala/fasthttp"
 	"go.uber.org/zap"
@@ -25,7 +31,7 @@ const (
 
 type (
 	BrowsePageData struct {
-		BucketName,
+		BucketInfo *data.BucketInfo
 		Prefix     string
 		Objects    []ResponseObject
 	}
@@ -33,11 +39,50 @@ type (
 		OID      string
 		Created  string
 		FileName string
+		FilePath string
 		Size     string
 		IsDir    bool
 	}
 )
 
+func newListObjectsResponseS3(attrs map[string]string) ResponseObject {
+	return ResponseObject{
+		OID:      attrs[attrOID],
+		Created:  attrs[attrCreated],
+		FileName: attrs[attrFileName],
+		Size:     attrs[attrSize],
+		IsDir:    attrs[attrOID] == "",
+	}
+}
+
+func newListObjectsResponseNative(attrs map[string]string) ResponseObject {
+	return ResponseObject{
+		OID:      attrs[attrOID],
+		Created:  attrs[object.AttributeTimestamp] + "000",
+		FileName: lastPathElement(attrs[object.AttributeFilePath]),
+		FilePath: attrs[object.AttributeFilePath],
+		Size:     attrs[attrSize],
+		IsDir:    false,
+	}
+}
+
+func getNextDir(filepath, prefix string) string {
+	restPath := strings.Replace(filepath, prefix, "", 1)
+	index := strings.Index(restPath, "/")
+	if index == -1 {
+		return ""
+	}
+	return restPath[:index]
+}
+
+func lastPathElement(path string) string {
+	index := strings.LastIndex(path, "/")
+	if index == len(path)-1 {
+		index = strings.LastIndex(path[:index], "/")
+	}
+	return path[index+1:]
+}
+
 func parseTimestamp(tstamp string) (time.Time, error) {
 	millis, err := strconv.ParseInt(tstamp, 10, 64)
 	if err != nil {
@@ -47,16 +92,6 @@ func parseTimestamp(tstamp string) (time.Time, error) {
 	return time.UnixMilli(millis), nil
 }
 
-func NewResponseObject(nodes map[string]string) ResponseObject {
-	return ResponseObject{
-		OID:      nodes[attrOID],
-		Created:  nodes[attrCreated],
-		FileName: nodes[attrFileName],
-		Size:     nodes[attrSize],
-		IsDir:    nodes[attrOID] == "",
-	}
-}
-
 func formatTimestamp(strdate string) string {
 	date, err := parseTimestamp(strdate)
 	if err != nil || date.IsZero() {
@@ -94,12 +129,9 @@ func trimPrefix(encPrefix string) string {
 	return prefix[:slashIndex]
 }
 
-func urlencode(prefix, filename string) string {
+func urlencode(path string) string {
 	var res strings.Builder
-	path := filename
-	if prefix != "" {
-		path = strings.Join([]string{prefix, filename}, "/")
-	}
+
 	prefixParts := strings.Split(path, "/")
 	for _, prefixPart := range prefixParts {
 		prefixPart = "/" + url.PathEscape(prefixPart)
@@ -112,28 +144,155 @@ func urlencode(prefix, filename string) string {
 	return res.String()
 }
 
-func (h *Handler) browseObjects(c *fasthttp.RequestCtx, bucketInfo *data.BucketInfo, prefix string) {
-	log := h.log.With(zap.String("bucket", bucketInfo.Name))
+func (h *Handler) getDirObjectsS3(ctx context.Context, bucketInfo *data.BucketInfo, prefix string) ([]ResponseObject, error) {
+	nodes, _, err := h.tree.GetSubTreeByPrefix(ctx, bucketInfo, prefix, true)
+	if err != nil {
+		return nil, err
+	}
+
+	var objects = make([]ResponseObject, 0, len(nodes))
+	for _, node := range nodes {
+		meta := node.GetMeta()
+		if meta == nil {
+			continue
+		}
+		var attrs = make(map[string]string, len(meta))
+		for _, m := range meta {
+			attrs[m.GetKey()] = string(m.GetValue())
+		}
+		obj := newListObjectsResponseS3(attrs)
+		obj.FilePath = prefix + obj.FileName
+		objects = append(objects, obj)
+	}
+
+	return objects, nil
+}
+
+func (h *Handler) getDirObjectsNative(ctx context.Context, bucketInfo *data.BucketInfo, prefix string) ([]ResponseObject, error) {
+	basePath := strings.TrimRightFunc(prefix, func(r rune) bool {
+		return r != '/'
+	})
+	objectIDs, err := h.search(ctx, bucketInfo.CID, object.AttributeFilePath, prefix, object.MatchCommonPrefix)
+	if err != nil {
+		return nil, err
+	}
+	defer objectIDs.Close()
+
+	objects, err := h.headDirObjects(ctx, bucketInfo.CID, objectIDs, basePath)
+	if err != nil {
+		return nil, err
+	}
+	return objects, nil
+}
+
+func (h *Handler) headDirObjects(ctx context.Context, cID cid.ID, objectIDs ResObjectSearch, basePath string) ([]ResponseObject, error) {
+	const initialSliceCapacity = 100
+
+	var (
+		log = h.log.With(
+			zap.String("cid", cID.EncodeToString()),
+			zap.String("prefix", basePath),
+		)
+		mu      = sync.Mutex{}
+		wg      = sync.WaitGroup{}
+		errChan = make(chan error)
+
+		addr    oid.Address
+		objects = make([]ResponseObject, 0, initialSliceCapacity)
+		dirs    = sync.Map{}
+		auth    = PrmAuth{
+			BearerToken: bearerToken(ctx),
+		}
+	)
+
+	ctx, cancel := context.WithCancel(ctx)
+	defer cancel()
+
+	go func() {
+		for err := range errChan {
+			if err != nil {
+				log.Error(logs.FailedToHeadObject, zap.Error(err))
+			}
+		}
+	}()
+
+	addr.SetContainer(cID)
+	err := objectIDs.Iterate(func(id oid.ID) bool {
+		wg.Add(1)
+		go func() {
+			defer wg.Done()
+
+			addr.SetObject(id)
+			obj, err := h.frostfs.HeadObject(ctx, PrmObjectHead{
+				PrmAuth: auth,
+				Address: addr,
+			})
+			if err != nil {
+				errChan <- err
+				cancel()
+				return
+			}
+
+			attrs := loadAttributes(obj.Attributes())
+			attrs[attrOID] = id.EncodeToString()
+			attrs[attrSize] = strconv.FormatUint(obj.PayloadSize(), 10)
+
+			dirname := getNextDir(attrs[object.AttributeFilePath], basePath)
+			if dirname == "" {
+				mu.Lock()
+				objects = append(objects, newListObjectsResponseNative(attrs))
+				mu.Unlock()
+			} else if _, ok := dirs.Load(dirname); !ok {
+				mu.Lock()
+				objects = append(objects, ResponseObject{
+					FileName: dirname,
+					FilePath: basePath + dirname,
+					IsDir:    true,
+				})
+				mu.Unlock()
+				dirs.Store(dirname, true)
+			}
+		}()
+
+		return false
+	})
+
+	if err != nil {
+		return nil, err
+	}
+
+	wg.Wait()
+	close(errChan)
+
+	return objects, nil
+}
+
+type browseParams struct {
+	bucketInfo  *data.BucketInfo
+	template    string
+	listObjects func(ctx context.Context, bucketName *data.BucketInfo, prefix string) ([]ResponseObject, error)
+	prefix      string
+}
+
+func (h *Handler) browseObjects(c *fasthttp.RequestCtx, p browseParams) {
+	log := h.log.With(
+		zap.String("bucket", p.bucketInfo.Name),
+		zap.String("container", p.bucketInfo.CID.EncodeToString()),
+		zap.String("prefix", p.prefix),
+	)
 	ctx := utils.GetContextFromRequest(c)
-	nodes, err := h.listObjects(ctx, bucketInfo, prefix)
+	objects, err := p.listObjects(ctx, p.bucketInfo, p.prefix)
 	if err != nil {
 		logAndSendBucketError(c, log, err)
 		return
 	}
 
-	respObjects := make([]ResponseObject, len(nodes))
-
-	for i, node := range nodes {
-		respObjects[i] = NewResponseObject(node)
+	sort.Slice(objects, func(i, j int) bool {
+		if objects[i].IsDir == objects[j].IsDir {
+			return objects[i].FileName < objects[j].FileName
 		}
-
-	sort.Slice(respObjects, func(i, j int) bool {
-		if respObjects[i].IsDir == respObjects[j].IsDir {
-			return respObjects[i].FileName < respObjects[j].FileName
-		}
-		return respObjects[i].IsDir
+		return objects[i].IsDir
 	})
-	indexTemplate := h.config.IndexPageTemplate()
 
 	tmpl, err := template.New("index").Funcs(template.FuncMap{
 		"formatTimestamp": formatTimestamp,
@@ -141,15 +300,15 @@ func (h *Handler) browseObjects(c *fasthttp.RequestCtx, bucketInfo *data.BucketI
 		"trimPrefix":      trimPrefix,
 		"urlencode":       urlencode,
 		"parentDir":       parentDir,
-	}).Parse(indexTemplate)
+	}).Parse(p.template)
 	if err != nil {
 		logAndSendBucketError(c, log, err)
 		return
 	}
 	if err = tmpl.Execute(c, &BrowsePageData{
-		BucketName: bucketInfo.Name,
-		Prefix:     prefix,
-		Objects:    respObjects,
+		BucketInfo: p.bucketInfo,
+		Prefix:     p.prefix,
+		Objects:    objects,
 	}); err != nil {
 		logAndSendBucketError(c, log, err)
 		return

internal/handler/download.go

@@ -23,10 +23,9 @@ import (
 
 // DownloadByAddressOrBucketName handles download requests using simple cid/oid or bucketname/key format.
 func (h *Handler) DownloadByAddressOrBucketName(c *fasthttp.RequestCtx) {
-	test, _ := c.UserValue("oid").(string)
-	var id oid.ID
-	err := id.DecodeString(test)
-	if err != nil {
+	testCID, _ := c.UserValue("cid").(string)
+	var cntID cid.ID
+	if err := cntID.DecodeString(testCID); err != nil {
 		h.byObjectName(c, h.receiveFile)
 	} else {
 		h.byAddress(c, h.receiveFile)
@@ -45,7 +44,7 @@ func (h *Handler) DownloadByAttribute(c *fasthttp.RequestCtx) {
 	h.byAttribute(c, h.receiveFile)
 }
 
-func (h *Handler) search(ctx context.Context, cnrID *cid.ID, key, val string, op object.SearchMatchType) (ResObjectSearch, error) {
+func (h *Handler) search(ctx context.Context, cnrID cid.ID, key, val string, op object.SearchMatchType) (ResObjectSearch, error) {
 	filters := object.NewSearchFilters()
 	filters.AddRootFilter()
 	filters.AddFilter(key, val, op)
@@ -54,7 +53,7 @@ func (h *Handler) search(ctx context.Context, cnrID *cid.ID, key, val string, op
 		PrmAuth: PrmAuth{
 			BearerToken: bearerToken(ctx),
 		},
-		Container: *cnrID,
+		Container: cnrID,
 		Filters:   filters,
 	}
 
@@ -101,7 +100,7 @@ func (h *Handler) DownloadZipped(c *fasthttp.RequestCtx) {
 		return
 	}
 
-	resSearch, err := h.search(ctx, &bktInfo.CID, object.AttributeFilePath, prefix, object.MatchCommonPrefix)
+	resSearch, err := h.search(ctx, bktInfo.CID, object.AttributeFilePath, prefix, object.MatchCommonPrefix)
 	if err != nil {
 		log.Error(logs.CouldNotSearchForObjects, zap.Error(err))
 		response.Error(c, "could not search for objects: "+err.Error(), fasthttp.StatusBadRequest)

internal/handler/handler.go

@@ -31,7 +31,8 @@ type Config interface {
 	ZipCompression() bool
 	ClientCut() bool
 	IndexPageEnabled() bool
-	IndexPageTemplate() string
+	IndexPageS3Template() string
+	IndexPageNativeTemplate() string
 	BufferMaxSizeForPut() uint64
 	NamespaceHeader() string
 }
@@ -182,7 +183,7 @@ func New(params *AppParams, config Config, tree *tree.Tree) *Handler {
 func (h *Handler) byAddress(c *fasthttp.RequestCtx, f func(context.Context, request, oid.Address)) {
 	var (
 		idCnr, _ = c.UserValue("cid").(string)
-		idObj, _ = c.UserValue("oid").(string)
+		idObj, _ = url.PathUnescape(c.UserValue("oid").(string))
 		log      = h.log.With(zap.String("cid", idCnr), zap.String("oid", idObj))
 	)
 
@@ -196,6 +197,18 @@ func (h *Handler) byAddress(c *fasthttp.RequestCtx, f func(context.Context, requ
 
 	objID := new(oid.ID)
 	if err = objID.DecodeString(idObj); err != nil {
+		if h.config.IndexPageEnabled() {
+			var addr oid.Address
+			addr.SetContainer(bktInfo.CID)
+			c.SetStatusCode(fasthttp.StatusNotFound)
+			h.browseObjects(c, browseParams{
+				bucketInfo:  bktInfo,
+				prefix:      idObj,
+				listObjects: h.getDirObjectsNative,
+				template:    h.config.IndexPageNativeTemplate(),
+			})
+			return
+		}
 		log.Error(logs.WrongObjectID, zap.Error(err))
 		response.Error(c, "wrong object id", fasthttp.StatusBadRequest)
 		return
@@ -205,6 +218,28 @@ func (h *Handler) byAddress(c *fasthttp.RequestCtx, f func(context.Context, requ
 	addr.SetContainer(bktInfo.CID)
 	addr.SetObject(*objID)
 
+	_, err = h.frostfs.GetObject(ctx, PrmObjectGet{
+		PrmAuth: PrmAuth{
+			BearerToken: bearerToken(ctx),
+		},
+		Address: addr,
+	})
+
+	if err != nil {
+		if h.config.IndexPageEnabled() {
+			c.SetStatusCode(fasthttp.StatusNotFound)
+			h.browseObjects(c, browseParams{
+				bucketInfo:  bktInfo,
+				prefix:      "",
+				listObjects: h.getDirObjectsNative,
+				template:    h.config.IndexPageNativeTemplate(),
+			})
+			return
+		}
+		logAndSendBucketError(c, log, err)
+		return
+	}
+
 	f(ctx, *h.newRequest(c, log), addr)
 }
 
@@ -237,7 +272,12 @@ func (h *Handler) byObjectName(c *fasthttp.RequestCtx, f func(context.Context, r
 		if isDir(unescapedKey) || isContainerRoot(unescapedKey) {
 			if code := checkErrorType(err); code == fasthttp.StatusNotFound || code == fasthttp.StatusOK {
 				c.SetStatusCode(code)
-				h.browseObjects(c, bktInfo, unescapedKey)
+				h.browseObjects(c, browseParams{
+					bucketInfo:  bktInfo,
+					prefix:      unescapedKey,
+					listObjects: h.getDirObjectsS3,
+					template:    h.config.IndexPageS3Template(),
+				})
 				return
 			}
 		}
@@ -294,7 +334,7 @@ func (h *Handler) byAttribute(c *fasthttp.RequestCtx, f func(context.Context, re
 		return
 	}
 
-	res, err := h.search(ctx, &bktInfo.CID, key, val, object.MatchStringEqual)
+	res, err := h.search(ctx, bktInfo.CID, key, val, object.MatchStringEqual)
 	if err != nil {
 		log.Error(logs.CouldNotSearchForObjects, zap.Error(err))
 		response.Error(c, "could not search for objects: "+err.Error(), fasthttp.StatusBadRequest)
@@ -390,25 +430,3 @@ func (h *Handler) readContainer(ctx context.Context, cnrID cid.ID) (*data.Bucket
 
 	return bktInfo, err
 }
-
-func (h *Handler) listObjects(ctx context.Context, bucketInfo *data.BucketInfo, prefix string) ([]map[string]string, error) {
-	nodes, _, err := h.tree.GetSubTreeByPrefix(ctx, bucketInfo, prefix, true)
-	if err != nil {
-		return nil, err
-	}
-
-	var objects = make([]map[string]string, 0, len(nodes))
-	for _, node := range nodes {
-		meta := node.GetMeta()
-		if meta == nil {
-			continue
-		}
-		var obj = make(map[string]string, len(meta))
-		for _, m := range meta {
-			obj[m.GetKey()] = string(m.GetValue())
-		}
-		objects = append(objects, obj)
-	}
-
-	return objects, nil
-}

internal/handler/handler_test.go

@@ -57,10 +57,10 @@ func (c *configMock) IndexPageEnabled() bool {
 	return false
 }
 
-func (c *configMock) IndexPageTemplatePath() string {
+func (c *configMock) IndexPageS3Template() string {
 	return ""
 }
-func (c *configMock) IndexPageTemplate() string {
+func (c *configMock) IndexPageNativeTemplate() string {
 	return ""
 }
 

internal/handler/utils.go

@@ -12,6 +12,7 @@ import (
 	"git.frostfs.info/TrueCloudLab/frostfs-http-gw/tree"
 	"git.frostfs.info/TrueCloudLab/frostfs-sdk-go/bearer"
 	"git.frostfs.info/TrueCloudLab/frostfs-sdk-go/client"
+	"git.frostfs.info/TrueCloudLab/frostfs-sdk-go/object"
 	"github.com/valyala/fasthttp"
 	"go.uber.org/zap"
 )
@@ -59,6 +60,14 @@ func checkErrorType(err error) int {
 	}
 }
 
+func loadAttributes(attrs []object.Attribute) map[string]string {
+	result := make(map[string]string)
+	for _, attr := range attrs {
+		result[attr.Key()] = attr.Value()
+	}
+	return result
+}
+
 func isValidToken(s string) bool {
 	for _, c := range s {
 		if c <= ' ' || c > 127 {

internal/logs/logs.go

@@ -71,6 +71,7 @@ const (
 	AddedStoragePeer                                                      = "added storage peer"                                                                     // Info in ../../settings.go
 	CouldntGetBucket                                                      = "could not get bucket"                                                                   // Error in ../handler/utils.go
 	CouldntPutBucketIntoCache                                             = "couldn't put bucket info into cache"                                                    // Warn in ../handler/handler.go
+	FailedToHeadObject                                                    = "failed to HEAD object"                                                                  // Error in ../handler/handler.go
 	InvalidCacheEntryType                                                 = "invalid cache entry type"                                                               // Warn in ../cache/buckets.go
 	InvalidLifetimeUsingDefaultValue                                      = "invalid lifetime, using default value (in seconds)"                                     // Error in ../../cmd/http-gw/settings.go
 	InvalidCacheSizeUsingDefaultValue                                     = "invalid cache size, using default value"                                                // Error in ../../cmd/http-gw/settings.go

internal/templates/index.gotmpl

@@ -1,4 +1,4 @@
-{{$bucketName := .BucketName}}
+{{$bucketName := .BucketInfo.Name}}
 {{ $prefix := trimPrefix .Prefix }}
 <!DOCTYPE html>
 <html lang="en">
@@ -42,7 +42,7 @@
     {{if $trimmedPrefix }}
         <tr>
             <td>
-                ⮐<a href="/get/{{$bucketName}}{{ urlencode $trimmedPrefix "" }}">..</a>
+                ⮐<a href="/get/{{$bucketName}}{{ urlencode $trimmedPrefix }}/">..</a>
             </td>
             <td></td>
             <td></td>
@@ -63,12 +63,12 @@
             <td>
                 {{if .IsDir}}
                     🗀
-                    <a href="/get/{{ $bucketName }}{{ urlencode $prefix .FileName }}/">
+                    <a href="/get/{{ $bucketName }}{{ urlencode .FilePath }}/">
                         {{.FileName}}/
                     </a>
                 {{else}}
                     🗎
-                    <a href="/get/{{ $bucketName }}{{ urlencode $prefix .FileName }}">
+                    <a href="/get/{{ $bucketName }}{{ urlencode .FilePath }}">
                         {{.FileName}}
                     </a>
                 {{end}}
@@ -77,7 +77,7 @@
             <td>{{if not .IsDir}}{{ formatTimestamp .Created }}{{end}}</td>
             <td>
                 {{ if not .IsDir }}
-                    <a href="/get/{{ $bucketName}}{{ urlencode $prefix .FileName }}?download=true">
+                    <a href="/get/{{ $bucketName}}{{ urlencode .FilePath }}?download=true">
                         Link
                     </a>
                 {{ end }}

internal/templates/index_native.gotmpl

@@ -0,0 +1,101 @@
+{{$container := .BucketInfo.CID}}
+{{ $prefix := trimPrefix .Prefix }}
+<!DOCTYPE html>
+<html lang="en">
+<head>
+    <meta charset="UTF-8"/>
+    <title>Index of frostfs://{{$container}}/{{if $prefix}}/{{$prefix}}/{{end}}</title>
+    <style>
+        table {
+            width: 80%;
+            border-collapse: collapse;
+        }
+
+        body {
+            background: #f2f2f2;
+        }
+
+        table, th, td {
+            border: 0 solid transparent;
+        }
+
+        th, td {
+            padding: 10px;
+            text-align: left;
+        }
+
+        th {
+            background-color: #c3bcbc;
+        }
+
+        h1 {
+            font-size: 1.5em;
+        }
+
+        tr:nth-child(even) {
+            background-color: #ebe7e7;
+        }
+    </style>
+</head>
+<body>
+<h1>Index of frostfs://{{$container}}/{{if $prefix}}{{$prefix}}/{{end}}</h1>
+<table>
+    <thead>
+    <tr>
+        <th>Filename</th>
+        <th>Size</th>
+        <th>Created</th>
+        <th>Download</th>
+    </tr>
+    </thead>
+    <tbody>
+    {{ $trimmedPrefix := trimPrefix $prefix }}
+    {{if $trimmedPrefix }}
+        <tr>
+            <td>
+                ⮐<a href="/get/{{$container}}{{ urlencode $trimmedPrefix }}/">..</a>
+            </td>
+            <td></td>
+            <td></td>
+            <td></td>
+        </tr>
+    {{else}}
+        <tr>
+            <td>
+                ⮐<a href="/get/{{ $container }}/">..</a>
+            </td>
+            <td></td>
+            <td></td>
+            <td></td>
+        </tr>
+    {{end}}
+    {{range .Objects}}
+        <tr>
+            <td>
+                {{if .IsDir}}
+                    🗀
+                    <a href="/get/{{ $container }}{{ urlencode .FilePath }}/">
+                        {{.FileName}}/
+                    </a>
+                {{else}}
+                    🗎
+                    <a href="/get/{{ $container }}/{{ .OID }}">
+                        {{.FileName}}
+                    </a>
+                {{end}}
+            </td>
+            <td>{{if .Size}}{{ formatSize .Size }}{{end}}</td>
+            <td>{{if .Created}}{{ formatTimestamp .Created }}{{end}}</td>
+            <td>
+                {{ if .OID }}
+                    <a href="/get/{{ $container}}/{{ .OID }}?download=true">
+                        Link
+                    </a>
+                {{ end }}
+            </td>
+        </tr>
+    {{end}}
+    </tbody>
+</table>
+</body>
+</html>

internal/templates/template.go

@@ -4,3 +4,6 @@ import _ "embed"
 
 //go:embed index.gotmpl
 var DefaultIndexTemplate string
+
+//go:embed index_native.gotmpl
+var DefaultIndexNativeTemplate string