[#233] Fix browsing

Simplify tree listing (we need only nodes in exactly the same parent level)

Signed-off-by: Denis Kirillov <d.kirillov@yadro.com>

internal/handler/browse.go

@@ -130,11 +130,15 @@ func parentDir(prefix string) string {
 	return prefix[index:]
 }
 
-func trimPrefix(encPrefix string) string {
+func getParent(encPrefix string) string {
 	prefix, err := url.PathUnescape(encPrefix)
 	if err != nil {
 		return ""
 	}
+	if prefix != "" && prefix[len(prefix)-1] == '/' {
+		prefix = prefix[:len(prefix)-1]
+	}
+
 	slashIndex := strings.LastIndex(prefix, "/")
 	if slashIndex == -1 {
 		return ""
@@ -164,7 +168,11 @@ type GetObjectsResponse struct {
 }
 
 func (h *Handler) getDirObjectsS3(ctx context.Context, bucketInfo *data.BucketInfo, prefix string) (*GetObjectsResponse, error) {
-	nodes, _, err := h.tree.GetSubTreeByPrefix(ctx, bucketInfo, prefix, true)
+	if prefix != "" && prefix[len(prefix)-1] == '/' {
+		prefix = prefix[:len(prefix)-1]
+	}
+
+	nodes, err := h.tree.GetSubTreeByPrefix(ctx, bucketInfo, prefix, true)
 	if err != nil {
 		return nil, err
 	}
@@ -185,7 +193,7 @@ func (h *Handler) getDirObjectsS3(ctx context.Context, bucketInfo *data.BucketIn
 		if obj.IsDeleteMarker {
 			continue
 		}
-		obj.FilePath = prefix + obj.FileName
+		obj.FilePath = prefix + "/" + obj.FileName
 		obj.GetURL = "/get/" + bucketInfo.Name + urlencode(obj.FilePath)
 		result.objects = append(result.objects, obj)
 	}
@@ -194,9 +202,9 @@ func (h *Handler) getDirObjectsS3(ctx context.Context, bucketInfo *data.BucketIn
 }
 
 func (h *Handler) getDirObjectsNative(ctx context.Context, bucketInfo *data.BucketInfo, prefix string) (*GetObjectsResponse, error) {
-	var basePath string
-	if ind := strings.LastIndex(prefix, "/"); ind != -1 {
-		basePath = prefix[:ind+1]
+	basePath := prefix
+	if basePath != "" && basePath[len(basePath)-1] != '/' {
+		basePath += "/"
 	}
 
 	filters := object.NewSearchFilters()
@@ -342,7 +350,7 @@ func (h *Handler) browseObjects(ctx context.Context, req *fasthttp.RequestCtx, p
 
 	tmpl, err := template.New("index").Funcs(template.FuncMap{
 		"formatSize": formatSize,
-		"trimPrefix": trimPrefix,
+		"getParent":  getParent,
 		"urlencode":  urlencode,
 		"parentDir":  parentDir,
 	}).Parse(h.config.IndexPageTemplate())
@@ -356,9 +364,14 @@ func (h *Handler) browseObjects(ctx context.Context, req *fasthttp.RequestCtx, p
 		bucketName = p.bucketInfo.CID.EncodeToString()
 		protocol = FrostfsProtocol
 	}
+	prefix := p.prefix
+	if prefix != "" && prefix[len(prefix)-1] != '/' {
+		prefix += "/"
+	}
+
 	if err = tmpl.Execute(req, &BrowsePageData{
 		Container: bucketName,
-		Prefix:    p.prefix,
+		Prefix:    prefix,
 		Objects:   objects,
 		Protocol:  protocol,
 		HasErrors: p.objects.hasErrors,

internal/handler/download.go

@@ -14,8 +14,8 @@ import (
 	"time"
 
 	"git.frostfs.info/TrueCloudLab/frostfs-http-gw/internal/data"
-	"git.frostfs.info/TrueCloudLab/frostfs-http-gw/internal/layer"
 	"git.frostfs.info/TrueCloudLab/frostfs-http-gw/internal/logs"
+	"git.frostfs.info/TrueCloudLab/frostfs-http-gw/tree"
 	"git.frostfs.info/TrueCloudLab/frostfs-http-gw/utils"
 	"git.frostfs.info/TrueCloudLab/frostfs-observability/tracing"
 	cid "git.frostfs.info/TrueCloudLab/frostfs-sdk-go/container/id"
@@ -51,7 +51,7 @@ func (h *Handler) DownloadByAddressOrBucketName(req *fasthttp.RequestCtx) {
 	}
 
 	checkS3Err := h.tree.CheckSettingsNodeExists(ctx, bktInfo)
-	if checkS3Err != nil && !errors.Is(checkS3Err, layer.ErrNodeNotFound) {
+	if checkS3Err != nil && !errors.Is(checkS3Err, tree.ErrNodeNotFound) {
 		h.logAndSendError(ctx, req, logs.FailedToCheckIfSettingsNodeExist, checkS3Err)
 		return
 	}
@@ -156,7 +156,7 @@ func (h *Handler) byS3PathMiddleware(handler func(context.Context, *fasthttp.Req
 			return false
 		}
 
-		if !errors.Is(err, layer.ErrNodeNotFound) {
+		if !errors.Is(err, tree.ErrNodeNotFound) {
 			h.logAndSendError(ctx, prm.Request, logs.FailedToGetLatestVersionOfIndexObject, err, zap.String("path", path))
 			return false
 		}

internal/handler/handler.go

@@ -11,8 +11,8 @@ import (
 	"git.frostfs.info/TrueCloudLab/frostfs-http-gw/internal/cache"
 	"git.frostfs.info/TrueCloudLab/frostfs-http-gw/internal/data"
 	"git.frostfs.info/TrueCloudLab/frostfs-http-gw/internal/handler/middleware"
-	"git.frostfs.info/TrueCloudLab/frostfs-http-gw/internal/layer"
 	"git.frostfs.info/TrueCloudLab/frostfs-http-gw/internal/logs"
+	"git.frostfs.info/TrueCloudLab/frostfs-http-gw/tree"
 	"git.frostfs.info/TrueCloudLab/frostfs-http-gw/utils"
 	"git.frostfs.info/TrueCloudLab/frostfs-observability/tracing"
 	"git.frostfs.info/TrueCloudLab/frostfs-sdk-go/bearer"
@@ -173,7 +173,7 @@ type Handler struct {
 	ownerID           *user.ID
 	config            Config
 	containerResolver ContainerResolver
-	tree              layer.TreeService
+	tree              *tree.Tree
 	cache             *cache.BucketCache
 	workerPool        *ants.Pool
 	corsCnrID         cid.ID
@@ -190,7 +190,7 @@ type AppParams struct {
 	CORSCache *cache.CORSCache
 }
 
-func New(params *AppParams, config Config, tree layer.TreeService, workerPool *ants.Pool) *Handler {
+func New(params *AppParams, config Config, tree *tree.Tree, workerPool *ants.Pool) *Handler {
 	return &Handler{
 		log:               params.Logger,
 		frostfs:           params.FrostFS,

internal/handler/handler_test.go

@@ -14,9 +14,10 @@ import (
 	"git.frostfs.info/TrueCloudLab/frostfs-http-gw/internal/cache"
 	"git.frostfs.info/TrueCloudLab/frostfs-http-gw/internal/data"
 	"git.frostfs.info/TrueCloudLab/frostfs-http-gw/internal/handler/middleware"
-	"git.frostfs.info/TrueCloudLab/frostfs-http-gw/internal/layer"
+	"git.frostfs.info/TrueCloudLab/frostfs-http-gw/internal/templates"
 	"git.frostfs.info/TrueCloudLab/frostfs-http-gw/resolver"
 	"git.frostfs.info/TrueCloudLab/frostfs-http-gw/tokens"
+	"git.frostfs.info/TrueCloudLab/frostfs-http-gw/tree"
 	"git.frostfs.info/TrueCloudLab/frostfs-http-gw/utils"
 	v2container "git.frostfs.info/TrueCloudLab/frostfs-sdk-go/api/container"
 	"git.frostfs.info/TrueCloudLab/frostfs-sdk-go/container"
@@ -36,32 +37,6 @@ import (
 	"go.uber.org/zap/zaptest"
 )
 
-type treeServiceMock struct {
-	system map[string]map[string]*data.BaseNodeVersion
-}
-
-func newTreeService() *treeServiceMock {
-	return &treeServiceMock{
-		system: make(map[string]map[string]*data.BaseNodeVersion),
-	}
-}
-
-func (t *treeServiceMock) CheckSettingsNodeExists(context.Context, *data.BucketInfo) error {
-	_, ok := t.system["bucket-settings"]
-	if !ok {
-		return layer.ErrNodeNotFound
-	}
-	return nil
-}
-
-func (t *treeServiceMock) GetSubTreeByPrefix(context.Context, *data.BucketInfo, string, bool) ([]data.NodeInfo, string, error) {
-	return nil, "", nil
-}
-
-func (t *treeServiceMock) GetLatestVersion(context.Context, *cid.ID, string) (*data.NodeVersion, error) {
-	return nil, nil
-}
-
 type configMock struct {
 	additionalFilenameSearch bool
 	additionalSlashSearch    bool
@@ -82,7 +57,7 @@ func (c *configMock) IndexPageEnabled() bool {
 }
 
 func (c *configMock) IndexPageTemplate() string {
-	return ""
+	return templates.DefaultIndexTemplate
 }
 
 func (c *configMock) IndexPageNativeTemplate() string {
@@ -124,7 +99,7 @@ type handlerContext struct {
 
 	h       *Handler
 	frostfs *TestFrostFS
-	tree    *treeServiceMock
+	tree    *treeServiceClientMock
 	cfg     *configMock
 }
 
@@ -174,14 +149,14 @@ func prepareHandlerContextBase(logger *zap.Logger) (*handlerContext, error) {
 		}),
 	}
 
-	treeMock := newTreeService()
+	treeMock := newTreeServiceClientMock()
 	cfgMock := &configMock{}
 
 	workerPool, err := ants.NewPool(1)
 	if err != nil {
 		return nil, err
 	}
-	handler := New(params, cfgMock, treeMock, workerPool)
+	handler := New(params, cfgMock, tree.NewTree(treeMock, logger), workerPool)
 
 	return &handlerContext{
 		key:     key,
@@ -532,6 +507,100 @@ func TestGetObjectWithFallback(t *testing.T) {
 	})
 }
 
+func TestIndex(t *testing.T) {
+	ctx := middleware.SetNamespace(context.Background(), "")
+
+	t.Run("s3", func(t *testing.T) {
+		hc, cnrID := prepareHandlerAndBucket(t)
+
+		obj1ID := oidtest.ID()
+		obj1 := object.New()
+		obj1.SetID(obj1ID)
+		obj1.SetPayload([]byte("obj1"))
+		obj1.SetAttributes(prepareObjectAttributes(object.AttributeFilePath, "prefix/obj1"))
+		hc.frostfs.objects[cnrID.String()+"/"+obj1ID.String()] = obj1
+
+		hc.tree.containers[cnrID.String()] = containerInfo{
+			trees: map[string]map[string]nodeResponse{
+				"system": {"bucket-settings": nodeResponse{nodeID: 1}},
+				"version": {
+					"": nodeResponse{}, //root
+					"prefix": nodeResponse{
+						nodeID: 1,
+						meta:   []nodeMeta{{key: tree.FileNameKey, value: []byte("prefix")}}},
+					"obj1": nodeResponse{
+						parentID: 1,
+						nodeID:   2,
+						meta: []nodeMeta{
+							{key: tree.FileNameKey, value: []byte("obj1")},
+							{key: "OID", value: []byte(obj1ID.String())},
+						},
+					},
+				},
+			},
+		}
+
+		r := prepareGetRequest(ctx, cnrID.EncodeToString(), "prefix/")
+		hc.Handler().DownloadByAddressOrBucketName(r)
+		require.Equal(t, fasthttp.StatusNotFound, r.Response.StatusCode())
+
+		r = prepareGetRequest(ctx, cnrID.EncodeToString(), "prefix")
+		hc.Handler().DownloadByAddressOrBucketName(r)
+		require.Equal(t, fasthttp.StatusNotFound, r.Response.StatusCode())
+
+		hc.cfg.indexEnabled = true
+
+		r = prepareGetRequest(ctx, cnrID.EncodeToString(), "prefix")
+		hc.Handler().DownloadByAddressOrBucketName(r)
+		require.Contains(t, string(r.Response.Body()), "Index of s3://bucket/prefix")
+		require.Contains(t, string(r.Response.Body()), obj1ID.String())
+
+		r = prepareGetRequest(ctx, cnrID.EncodeToString(), "prefix/")
+		hc.Handler().DownloadByAddressOrBucketName(r)
+		require.Contains(t, string(r.Response.Body()), "Index of s3://bucket/prefix")
+		require.Contains(t, string(r.Response.Body()), obj1ID.String())
+
+		r = prepareGetRequest(ctx, "bucket", "dummy")
+		hc.Handler().DownloadByAddressOrBucketName(r)
+		require.Contains(t, string(r.Response.Body()), "Index of s3://bucket/dummy")
+	})
+
+	t.Run("native", func(t *testing.T) {
+		hc, cnrID := prepareHandlerAndBucket(t)
+
+		obj1ID := oidtest.ID()
+		obj1 := object.New()
+		obj1.SetID(obj1ID)
+		obj1.SetPayload([]byte("obj1"))
+		obj1.SetAttributes(prepareObjectAttributes(object.AttributeFilePath, "prefix/obj1"))
+		hc.frostfs.objects[cnrID.String()+"/"+obj1ID.String()] = obj1
+
+		r := prepareGetRequest(ctx, cnrID.EncodeToString(), "prefix/")
+		hc.Handler().DownloadByAddressOrBucketName(r)
+		require.Equal(t, fasthttp.StatusNotFound, r.Response.StatusCode())
+
+		r = prepareGetRequest(ctx, cnrID.EncodeToString(), "prefix")
+		hc.Handler().DownloadByAddressOrBucketName(r)
+		require.Equal(t, fasthttp.StatusNotFound, r.Response.StatusCode())
+
+		hc.cfg.indexEnabled = true
+
+		r = prepareGetRequest(ctx, cnrID.EncodeToString(), "prefix")
+		hc.Handler().DownloadByAddressOrBucketName(r)
+		require.Contains(t, string(r.Response.Body()), "Index of frostfs://"+cnrID.String()+"/prefix")
+		require.Contains(t, string(r.Response.Body()), obj1ID.String())
+
+		r = prepareGetRequest(ctx, cnrID.EncodeToString(), "prefix/")
+		hc.Handler().DownloadByAddressOrBucketName(r)
+		require.Contains(t, string(r.Response.Body()), "Index of frostfs://"+cnrID.String()+"/prefix")
+		require.Contains(t, string(r.Response.Body()), obj1ID.String())
+
+		r = prepareGetRequest(ctx, cnrID.EncodeToString(), "dummy")
+		hc.Handler().DownloadByAddressOrBucketName(r)
+		require.Contains(t, string(r.Response.Body()), "Index of frostfs://"+cnrID.String()+"/dummy")
+	})
+}
+
 func prepareUploadRequest(ctx context.Context, bucket, content string) (*fasthttp.RequestCtx, error) {
 	r := new(fasthttp.RequestCtx)
 	utils.SetContextToRequest(ctx, r)

internal/handler/head.go

@@ -9,8 +9,8 @@ import (
 	"strconv"
 	"time"
 
-	"git.frostfs.info/TrueCloudLab/frostfs-http-gw/internal/layer"
 	"git.frostfs.info/TrueCloudLab/frostfs-http-gw/internal/logs"
+	"git.frostfs.info/TrueCloudLab/frostfs-http-gw/tree"
 	"git.frostfs.info/TrueCloudLab/frostfs-http-gw/utils"
 	"git.frostfs.info/TrueCloudLab/frostfs-observability/tracing"
 	"git.frostfs.info/TrueCloudLab/frostfs-sdk-go/object"
@@ -142,7 +142,7 @@ func (h *Handler) HeadByAddressOrBucketName(req *fasthttp.RequestCtx) {
 	}
 
 	checkS3Err := h.tree.CheckSettingsNodeExists(ctx, bktInfo)
-	if checkS3Err != nil && !errors.Is(checkS3Err, layer.ErrNodeNotFound) {
+	if checkS3Err != nil && !errors.Is(checkS3Err, tree.ErrNodeNotFound) {
 		h.logAndSendError(ctx, req, logs.FailedToCheckIfSettingsNodeExist, checkS3Err)
 		return
 	}
@@ -157,7 +157,7 @@ func (h *Handler) HeadByAddressOrBucketName(req *fasthttp.RequestCtx) {
 	indexPageEnabled := h.config.IndexPageEnabled()
 
 	if checkS3Err == nil {
-		run(prm, h.errorMiddleware(logs.ObjectNotFound, layer.ErrNodeNotFound),
+		run(prm, h.errorMiddleware(logs.ObjectNotFound, tree.ErrNodeNotFound),
 			Middleware{Func: h.byS3PathMiddleware(h.headObject, noopFormer), Enabled: true},
 			Middleware{Func: h.byS3PathMiddleware(h.headObject, indexFormer), Enabled: indexPageEnabled},
 		)

internal/handler/tree_service_client_mock_test.go

@@ -0,0 +1,150 @@
+package handler
+
+import (
+	"context"
+	"errors"
+	"strings"
+
+	"git.frostfs.info/TrueCloudLab/frostfs-http-gw/internal/data"
+	"git.frostfs.info/TrueCloudLab/frostfs-http-gw/tree"
+)
+
+type nodeMeta struct {
+	key   string
+	value []byte
+}
+
+func (m nodeMeta) GetKey() string {
+	return m.key
+}
+
+func (m nodeMeta) GetValue() []byte {
+	return m.value
+}
+
+type nodeResponse struct {
+	meta      []nodeMeta
+	nodeID    uint64
+	parentID  uint64
+	timestamp uint64
+}
+
+func (n nodeResponse) GetNodeID() []uint64 {
+	return []uint64{n.nodeID}
+}
+
+func (n nodeResponse) GetParentID() []uint64 {
+	return []uint64{n.parentID}
+}
+
+func (n nodeResponse) GetTimestamp() []uint64 {
+	return []uint64{n.timestamp}
+}
+
+func (n nodeResponse) GetMeta() []tree.Meta {
+	res := make([]tree.Meta, len(n.meta))
+	for i, value := range n.meta {
+		res[i] = value
+	}
+	return res
+}
+
+func (n nodeResponse) getValue(key string) string {
+	for _, value := range n.meta {
+		if value.key == key {
+			return string(value.value)
+		}
+	}
+	return ""
+}
+
+type containerInfo struct {
+	trees map[string]map[string]nodeResponse
+}
+
+type treeServiceClientMock struct {
+	containers map[string]containerInfo
+}
+
+func newTreeServiceClientMock() *treeServiceClientMock {
+	return &treeServiceClientMock{
+		containers: make(map[string]containerInfo),
+	}
+}
+
+func (t *treeServiceClientMock) GetNodes(_ context.Context, p *tree.GetNodesParams) ([]tree.NodeResponse, error) {
+	cnr, ok := t.containers[p.CnrID.EncodeToString()]
+	if !ok {
+		return nil, tree.ErrNodeNotFound
+	}
+
+	tr, ok := cnr.trees[p.TreeID]
+	if !ok {
+		return nil, tree.ErrNodeNotFound
+	}
+
+	node, ok := tr[strings.Join(p.Path, "/")]
+	if !ok {
+		return nil, tree.ErrNodeNotFound
+	}
+
+	return []tree.NodeResponse{node}, nil
+}
+
+func (t *treeServiceClientMock) GetSubTree(_ context.Context, bktInfo *data.BucketInfo, treeID string, rootID []uint64, depth uint32, _ bool) ([]tree.NodeResponse, error) {
+	cnr, ok := t.containers[bktInfo.CID.EncodeToString()]
+	if !ok {
+		return nil, tree.ErrNodeNotFound
+	}
+
+	tr, ok := cnr.trees[treeID]
+	if !ok {
+		return nil, tree.ErrNodeNotFound
+	}
+
+	if len(rootID) != 1 {
+		return nil, errors.New("invalid rootID")
+	}
+
+	var root *nodeResponse
+	for _, v := range tr {
+		if v.nodeID == rootID[0] {
+			root = &v
+			break
+		}
+	}
+
+	if root == nil {
+		return nil, tree.ErrNodeNotFound
+	}
+
+	var res []nodeResponse
+	if depth == 0 {
+		for _, v := range tr {
+			res = append(res, v)
+		}
+	} else {
+		res = append(res, *root)
+		depthIndex := 0
+		for i := uint32(0); i < depth-1; i++ {
+			childrenCount := 0
+			for _, v := range tr {
+				for j := range res[depthIndex:] {
+					if v.parentID == res[j].nodeID {
+						res = append(res, v)
+						childrenCount++
+						break
+					}
+				}
+			}
+			depthIndex = len(res) - childrenCount
+		}
+	}
+
+	res2 := make([]tree.NodeResponse, len(res))
+	for i := range res {
+		res2[i] = res[i]
+	}
+
+	return res2, nil
+}

internal/handler/utils.go

@@ -6,9 +6,9 @@ import (
 	"fmt"
 	"strings"
 
-	"git.frostfs.info/TrueCloudLab/frostfs-http-gw/internal/layer"
 	"git.frostfs.info/TrueCloudLab/frostfs-http-gw/internal/logs"
 	"git.frostfs.info/TrueCloudLab/frostfs-http-gw/tokens"
+	"git.frostfs.info/TrueCloudLab/frostfs-http-gw/tree"
 	"git.frostfs.info/TrueCloudLab/frostfs-http-gw/utils"
 	"git.frostfs.info/TrueCloudLab/frostfs-sdk-go/bearer"
 	cid "git.frostfs.info/TrueCloudLab/frostfs-sdk-go/container/id"
@@ -93,7 +93,7 @@ func formErrorResponse(err error) (string, int) {
 	switch {
 	case errors.Is(err, ErrAccessDenied):
 		return fmt.Sprintf("Storage Access Denied:\n%v", err), fasthttp.StatusForbidden
-	case errors.Is(err, layer.ErrNodeAccessDenied):
+	case errors.Is(err, tree.ErrNodeAccessDenied):
 		return fmt.Sprintf("Tree Access Denied:\n%v", err), fasthttp.StatusForbidden
 	case errors.Is(err, ErrQuotaLimitReached):
 		return fmt.Sprintf("Quota Reached:\n%v", err), fasthttp.StatusConflict
@@ -101,7 +101,7 @@ func formErrorResponse(err error) (string, int) {
 		return fmt.Sprintf("Container Not Found:\n%v", err), fasthttp.StatusNotFound
 	case errors.Is(err, ErrObjectNotFound):
 		return fmt.Sprintf("Object Not Found:\n%v", err), fasthttp.StatusNotFound
-	case errors.Is(err, layer.ErrNodeNotFound):
+	case errors.Is(err, tree.ErrNodeNotFound):
 		return fmt.Sprintf("Tree Node Not Found:\n%v", err), fasthttp.StatusNotFound
 	case errors.Is(err, ErrGatewayTimeout):
 		return fmt.Sprintf("Gateway Timeout:\n%v", err), fasthttp.StatusGatewayTimeout

internal/layer/tree_service.go

@@ -1,24 +0,0 @@
-package layer
-
-import (
-	"context"
-	"errors"
-
-	"git.frostfs.info/TrueCloudLab/frostfs-http-gw/internal/data"
-	cid "git.frostfs.info/TrueCloudLab/frostfs-sdk-go/container/id"
-)
-
-// TreeService provide interface to interact with tree service using s3 data models.
-type TreeService interface {
-	GetLatestVersion(ctx context.Context, cnrID *cid.ID, objectName string) (*data.NodeVersion, error)
-	GetSubTreeByPrefix(ctx context.Context, bktInfo *data.BucketInfo, prefix string, latestOnly bool) ([]data.NodeInfo, string, error)
-	CheckSettingsNodeExists(ctx context.Context, bktInfo *data.BucketInfo) error
-}
-
-var (
-	// ErrNodeNotFound is returned from Tree service in case of not found error.
-	ErrNodeNotFound = errors.New("not found")
-
-	// ErrNodeAccessDenied is returned from Tree service in case of access denied error.
-	ErrNodeAccessDenied = errors.New("access denied")
-)

internal/templates/index.gotmpl

@@ -1,11 +1,9 @@
 {{$container := .Container}}
-{{ $prefix := trimPrefix .Prefix }}
 <!DOCTYPE html>
 <html lang="en">
 <head>
     <meta charset="UTF-8"/>
-    <title>Index of {{.Protocol}}://{{$container}}
-        /{{if $prefix}}/{{$prefix}}/{{end}}</title>
+    <title>Index of {{.Protocol}}://{{$container}}/{{.Prefix}}</title>
     <style>
         .alert {
             width: 80%;
@@ -40,7 +38,7 @@
     </style>
 </head>
 <body>
-<h1>Index of {{.Protocol}}://{{$container}}/{{if $prefix}}{{$prefix}}/{{end}}</h1>
+<h1>Index of {{.Protocol}}://{{$container}}/{{.Prefix}}</h1>
 {{ if .HasErrors }}
     <div class="alert">
         Errors occurred while processing the request. Perhaps some objects are missing
@@ -57,11 +55,11 @@
     </tr>
     </thead>
     <tbody>
-    {{ $trimmedPrefix := trimPrefix $prefix }}
-    {{if $trimmedPrefix }}
+    {{ $parentPrefix := getParent .Prefix }}
+    {{if $parentPrefix }}
         <tr>
             <td>
-                ⮐<a href="/get/{{$container}}{{ urlencode $trimmedPrefix }}/">..</a>
+                ⮐<a href="/get/{{$container}}{{ urlencode $parentPrefix }}/">..</a>
             </td>
             <td></td>
             <td></td>

tree/tree.go

@@ -7,7 +7,6 @@ import (
 	"strings"
 
 	"git.frostfs.info/TrueCloudLab/frostfs-http-gw/internal/data"
-	"git.frostfs.info/TrueCloudLab/frostfs-http-gw/internal/layer"
 	"git.frostfs.info/TrueCloudLab/frostfs-http-gw/internal/logs"
 	"git.frostfs.info/TrueCloudLab/frostfs-http-gw/utils"
 	"git.frostfs.info/TrueCloudLab/frostfs-observability/tracing"
@@ -52,10 +51,10 @@ type (
 
 var (
 	// ErrNodeNotFound is returned from ServiceClient in case of not found error.
-	ErrNodeNotFound = layer.ErrNodeNotFound
+	ErrNodeNotFound = errors.New("not found")
 
 	// ErrNodeAccessDenied is returned from ServiceClient service in case of access denied error.
-	ErrNodeAccessDenied = layer.ErrNodeAccessDenied
+	ErrNodeAccessDenied = errors.New("access denied")
 )
 
 const (
@@ -259,7 +258,7 @@ func (c *Tree) getSystemNode(ctx context.Context, bktInfo *data.BucketInfo, name
 	nodes = filterMultipartNodes(nodes)
 
 	if len(nodes) == 0 {
-		return nil, layer.ErrNodeNotFound
+		return nil, ErrNodeNotFound
 	}
 	if len(nodes) != 1 {
 		c.reqLogger(ctx).Warn(logs.FoundSeveralSystemTreeNodes, zap.String("name", name), logs.TagField(logs.TagExternalStorageTree))
@@ -303,7 +302,7 @@ func getLatestVersionNode(nodes []NodeResponse) (NodeResponse, error) {
 	}
 
 	if targetIndexNode == -1 {
-		return nil, fmt.Errorf("latest version: %w", layer.ErrNodeNotFound)
+		return nil, fmt.Errorf("latest version: %w", ErrNodeNotFound)
 	}
 
 	return nodes[targetIndexNode], nil
@@ -324,20 +323,23 @@ func pathFromName(objectName string) []string {
 	return strings.Split(objectName, separator)
 }
 
-func (c *Tree) GetSubTreeByPrefix(ctx context.Context, bktInfo *data.BucketInfo, prefix string, latestOnly bool) ([]data.NodeInfo, string, error) {
+func (c *Tree) GetSubTreeByPrefix(ctx context.Context, bktInfo *data.BucketInfo, prefix string, latestOnly bool) ([]data.NodeInfo, error) {
 	ctx, span := tracing.StartSpanFromContext(ctx, "tree.GetSubTreeByPrefix")
 	defer span.End()
 
-	rootID, tailPrefix, err := c.determinePrefixNode(ctx, bktInfo, versionTree, prefix)
+	rootID, err := c.getPrefixNodeID(ctx, bktInfo, versionTree, strings.Split(prefix, separator))
 	if err != nil {
-		return nil, "", err
+		if errors.Is(err, ErrNodeNotFound) {
+			return nil, nil
+		}
+		return nil, err
 	}
 	subTree, err := c.service.GetSubTree(ctx, bktInfo, versionTree, rootID, 2, false)
 	if err != nil {
 		if errors.Is(err, ErrNodeNotFound) {
-			return nil, "", nil
+			return nil, nil
 		}
-		return nil, "", err
+		return nil, err
 	}
 
 	nodesMap := make(map[string][]NodeResponse, len(subTree))
@@ -347,10 +349,6 @@ func (c *Tree) GetSubTreeByPrefix(ctx context.Context, bktInfo *data.BucketInfo,
 		}
 
 		fileName := GetFilename(node)
-		if !strings.HasPrefix(fileName, tailPrefix) {
-			continue
-		}
-
 		nodes := nodesMap[fileName]
 
 		// Add all nodes if flag latestOnly is false.
@@ -374,7 +372,7 @@ func (c *Tree) GetSubTreeByPrefix(ctx context.Context, bktInfo *data.BucketInfo,
 		result = append(result, nodeResponseToNodeInfo(nodes)...)
 	}
 
-	return result, strings.TrimSuffix(prefix, tailPrefix), nil
+	return result, nil
 }
 
 func nodeResponseToNodeInfo(nodes []NodeResponse) []data.NodeInfo {
@@ -386,22 +384,6 @@ func nodeResponseToNodeInfo(nodes []NodeResponse) []data.NodeInfo {
 	return nodesInfo
 }
 
-func (c *Tree) determinePrefixNode(ctx context.Context, bktInfo *data.BucketInfo, treeID, prefix string) ([]uint64, string, error) {
-	rootID := []uint64{0}
-	path := strings.Split(prefix, separator)
-	tailPrefix := path[len(path)-1]
-
-	if len(path) > 1 {
-		var err error
-		rootID, err = c.getPrefixNodeID(ctx, bktInfo, treeID, path[:len(path)-1])
-		if err != nil {
-			return nil, "", err
-		}
-	}
-
-	return rootID, tailPrefix, nil
-}
-
 func (c *Tree) getPrefixNodeID(ctx context.Context, bktInfo *data.BucketInfo, treeID string, prefixPath []string) ([]uint64, error) {
 	p := &GetNodesParams{
 		CnrID:      bktInfo.CID,
@@ -424,7 +406,7 @@ func (c *Tree) getPrefixNodeID(ctx context.Context, bktInfo *data.BucketInfo, tr
 	}
 
 	if len(intermediateNodes) == 0 {
-		return nil, layer.ErrNodeNotFound
+		return nil, ErrNodeNotFound
 	}
 
 	return intermediateNodes, nil